merge null_safety branch into master (#28)
* Migrate package to Null Safety.
- Update CHANGELOG.md.
- Add unsound entry point for test, so it can be run.
- Update SDK dependency to 2.9.0-1
- Updates travis config to run nnbd tests/analysis
- Adds dependency overrides so tests can be ran in null safety mode
- Updates package version to expected pre-release version
- Updates sdk constraints to restrict to dev sdks with the allow list
Co-authored-by @lrhn.
diff --git a/.travis.yml b/.travis.yml
index 8f0ecf6..afa42c9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,14 +1,38 @@
language: dart
dart:
- dev
-- stable
-# Only building master means that we don't run two builds for each pull request.
-dart_task:
-- test: --platform vm,chrome
-- dartanalyzer
-- dartfmt
+
+jobs:
+ include:
+ - stage: analyze_and_format
+ name: "Analyze lib/ (no experiment flag)"
+ dart: dev
+ os: linux
+ script: dartanalyzer --fatal-warnings --fatal-infos lib/
+ - stage: analyze_and_format
+ name: "Analyze (with experiment flag)"
+ dart: dev
+ os: linux
+ script: dartanalyzer --enable-experiment=non-nullable --fatal-warnings --fatal-infos .
+ - stage: analyze_and_format
+ name: "Format"
+ dart: dev
+ os: linux
+ script: dartfmt -n --set-exit-if-changed .
+ - stage: test
+ name: "Vm Tests"
+ dart: dev
+ os: linux
+ script: pub run --enable-experiment=non-nullable test -p vm
+ - stage: test
+ name: "Web Tests"
+ dart: dev
+ os: linux
+ script: pub run --enable-experiment=non-nullable test -p chrome
+
branches:
- only: [master]
+ only: [master, null_safety]
+
cache:
directories:
- $HOME/.pub-cache
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b8a7dce..458b8c8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
# Changelog
+## 1.1.0-nullsafety
+
+* Make package null safe.
+
## 1.0.0
* Core APIs deemed stable; package version set to 1.0.0.
diff --git a/analysis_options.yaml b/analysis_options.yaml
index 3bad72b..d34d1f0 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -5,3 +5,5 @@
annotate_overrides: ignore
prefer_single_quotes: ignore
use_function_type_syntax_for_parameters: ignore
+ enable-experiment:
+ - non-nullable
diff --git a/lib/src/characters.dart b/lib/src/characters.dart
index 676716b..70b40eb 100644
--- a/lib/src/characters.dart
+++ b/lib/src/characters.dart
@@ -47,14 +47,14 @@
/// as well as controlling the iteration in more detail.
CharacterRange get iteratorAtEnd;
- /// Whether [Character] is an element of this sequence of
- /// characters.
+ /// Whether [other] is an element of this sequence of
+ /// others.
///
- /// Returns false if [Character] is not a string containing
+ /// Returns false if [other] is not a string containing
/// a single character,
/// because then it is not a single element of this [Iterable]
/// of characters.
- bool contains(Object Character);
+ bool contains(Object? other);
/// Whether this sequence of characters contains [other]
/// as a subsequence.
@@ -79,13 +79,14 @@
/// Returns a [CharacterRange] containing the first occurrence of
/// [characters] in this string.
/// Returns `null` if there is no such occurrence.
- CharacterRange /*?*/ findFirst(Characters characters);
+ CharacterRange? findFirst(Characters characters);
/// Finds the last occurrence of [characters].
///
/// Returns a [CharacterRange] containing the last occurrence of
- /// [characters]. Returns `null` if there is no such occurrence,
- CharacterRange /*?*/ findLast(Characters characters);
+ /// [characters].
+ /// Returns `null` if there is no such occurrence,
+ CharacterRange? findLast(Characters characters);
/// Eagerly selects a subset of the characters.
///
@@ -132,7 +133,7 @@
/// of characters.
Characters skipWhile(bool Function(String) test);
- /// Eagerly selects a leading sequnce of characters.
+ /// Eagerly selects a leading sequence of characters.
///
/// Checks each character, from first to last, against [test],
/// until one is found whwere [test] returns `false`.
@@ -143,7 +144,7 @@
/// is returned.
Characters takeWhile(bool Function(String) test);
- /// Eagerly selects a leading sequnce of characters.
+ /// Eagerly selects a leading sequence of characters.
///
/// Checks each character, from last to first, against [test],
/// until one is found whwere [test] returns `false`.
@@ -679,7 +680,7 @@
///
/// Returns `null` if there are no occurrences of [pattern]
/// in the current range.
- CharacterRange /*?*/ replaceAll(Characters pattern, Characters replacement);
+ CharacterRange? replaceAll(Characters pattern, Characters replacement);
/// Splits the current range of characters at each occurrence of [pattern].
///
@@ -737,7 +738,7 @@
///
/// Returns `null` if there are no occurrences of [pattern]
/// in the current range.
- CharacterRange /*?*/ replaceFirst(Characters pattern, Characters replacement);
+ CharacterRange? replaceFirst(Characters pattern, Characters replacement);
/// Whether the current range starts with [characters].
///
diff --git a/lib/src/characters_impl.dart b/lib/src/characters_impl.dart
index 4f474c8..dde34d5 100644
--- a/lib/src/characters_impl.dart
+++ b/lib/src/characters_impl.dart
@@ -69,7 +69,7 @@
@override
Iterable<T> whereType<T>() {
- Iterable<Object> self = this;
+ Iterable<Object?> self = this;
if (self is Iterable<T>) {
return self.map<T>((x) => x);
}
@@ -83,7 +83,7 @@
}
@override
- String lastWhere(bool test(String element), {String orElse()}) {
+ String lastWhere(bool test(String element), {String orElse()?}) {
int cursor = string.length;
var brk = BackBreaks(string, cursor, 0, stateEoTNoBreak);
int next = 0;
@@ -114,7 +114,7 @@
}
@override
- bool contains(Object other) {
+ bool contains(Object? other) {
if (other is String) {
if (other.isEmpty) return false;
int next = Breaks(other, 0, other.length, stateSoTNoBreak).nextBreak();
@@ -375,14 +375,14 @@
String toString() => string;
@override
- CharacterRange findFirst(Characters characters) {
+ CharacterRange? findFirst(Characters characters) {
var range = _rangeAll;
if (range.collapseToFirst(characters)) return range;
return null;
}
@override
- CharacterRange findLast(Characters characters) {
+ CharacterRange? findLast(Characters characters) {
var range = _rangeAll;
if (range.collapseToLast(characters)) return range;
return null;
@@ -408,7 +408,7 @@
/// The [current] value is created lazily and cached to avoid repeated
/// or unnecessary string allocation.
- String _currentCache;
+ String? _currentCache;
StringCharacterRange(String string) : this._(string, 0, 0);
StringCharacterRange._(this._string, this._start, this._end);
@@ -778,8 +778,7 @@
}
@override
- CharacterRange /*?*/ replaceFirst(
- Characters pattern, Characters replacement) {
+ CharacterRange? replaceFirst(Characters pattern, Characters replacement) {
String patternString = pattern.string;
String replacementString = replacement.string;
String replaced;
@@ -799,7 +798,7 @@
}
@override
- CharacterRange /*?*/ replaceAll(Characters pattern, Characters replacement) {
+ CharacterRange? replaceAll(Characters pattern, Characters replacement) {
var patternString = pattern.string;
var replacementString = replacement.string;
if (patternString.isEmpty) {
@@ -811,7 +810,7 @@
if (_start == _end) return null;
int start = 0;
int cursor = _start;
- StringBuffer buffer;
+ StringBuffer? buffer;
while ((cursor = _indexOf(_string, patternString, cursor, _end)) >= 0) {
(buffer ??= StringBuffer())
..write(_string.substring(start, cursor))
diff --git a/pubspec.yaml b/pubspec.yaml
index 8863486..c0b1dc4 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,10 +1,96 @@
name: characters
-version: 1.0.0
+version: 1.1.0-nullsafety
description: String replacement with operations that are Unicode/grapheme cluster aware.
homepage: https://www.github.com/dart-lang/characters
environment:
- sdk: ">=2.6.0 <3.0.0"
+ # This must remain a tight constraint (only allow dev versions) until nnbd is
+ # stable.
+ sdk: '>=2.9.0-18.0 <2.9.0'
+
dev_dependencies:
test: "^1.6.0"
pedantic: ^1.9.0
+
+dependency_overrides:
+ async:
+ git:
+ url: git://github.com/dart-lang/async.git
+ ref: null_safety
+ boolean_selector:
+ git:
+ url: git://github.com/dart-lang/boolean_selector.git
+ ref: null_safety
+ charcode:
+ git:
+ url: git://github.com/dart-lang/charcode.git
+ ref: null_safety
+ collection:
+ git: git://github.com/dart-lang/collection.git
+ js:
+ git:
+ url: git://github.com/dart-lang/sdk.git
+ path: pkg/js
+ matcher:
+ git:
+ url: git://github.com/dart-lang/matcher.git
+ ref: null_safety
+ meta:
+ git:
+ url: git://github.com/dart-lang/sdk.git
+ path: pkg/meta
+ path:
+ git:
+ url: git://github.com/dart-lang/path.git
+ ref: null_safety
+ pedantic:
+ git:
+ url: git://github.com/dart-lang/pedantic.git
+ ref: null_safety
+ pool:
+ git:
+ url: git://github.com/dart-lang/pool.git
+ ref: null_safety
+ source_maps:
+ git:
+ url: git://github.com/dart-lang/source_maps.git
+ ref: null_safety
+ source_map_stack_trace:
+ git:
+ url: git://github.com/dart-lang/source_map_stack_trace.git
+ ref: null_safety
+ source_span:
+ git:
+ url: git://github.com/dart-lang/source_span.git
+ ref: null_safety
+ stack_trace:
+ git:
+ url: git://github.com/dart-lang/stack_trace.git
+ ref: null_safety
+ stream_channel:
+ git:
+ url: git://github.com/dart-lang/stream_channel.git
+ ref: null_safety
+ string_scanner:
+ git:
+ url: git://github.com/dart-lang/string_scanner.git
+ ref: null_safety
+ term_glyph:
+ git:
+ url: git://github.com/dart-lang/term_glyph.git
+ ref: null_safety
+ test_api:
+ git:
+ url: git://github.com/dart-lang/test.git
+ ref: null_safety
+ path: pkgs/test_api
+ test_core:
+ git:
+ url: git://github.com/dart-lang/test.git
+ ref: null_safety
+ path: pkgs/test_core
+ test:
+ git:
+ url: git://github.com/dart-lang/test.git
+ ref: null_safety
+ path: pkgs/test
diff --git a/test/characters_test.dart b/test/characters_test.dart
index f34e6ec..d7f057b 100644
--- a/test/characters_test.dart
+++ b/test/characters_test.dart
@@ -1,668 +1,13 @@
-// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-import "dart:math";
-
-import "package:test/test.dart";
-
-import "package:characters/characters.dart";
-
-import "src/unicode_tests.dart";
-import "src/unicode_grapheme_tests.dart";
-import "src/various_tests.dart";
-
-Random random;
-
-void main([List<String> args]) {
- // Ensure random seed is part of every test failure message,
- // and that it can be reapplied for testing.
- var seed = (args != null && args.isNotEmpty)
- ? int.parse(args[0])
- : Random().nextInt(0x3FFFFFFF);
- random = Random(seed);
- group("[Random Seed: $seed]", tests);
- group("characters", () {
- test("operations", () {
- var flag = "\u{1F1E9}\u{1F1F0}"; // Regional Indicators "DK".
- var string = "Hi $flag!";
- expect(string.length, 8);
- var cs = gc(string);
- expect(cs.length, 5);
- expect(cs.toList(), ["H", "i", " ", flag, "!"]);
- expect(cs.skip(2).toString(), " $flag!");
- expect(cs.skipLast(2).toString(), "Hi ");
- expect(cs.take(2).toString(), "Hi");
- expect(cs.takeLast(2).toString(), "$flag!");
-
- expect(cs.contains("\u{1F1E9}"), false);
- expect(cs.contains(flag), true);
- expect(cs.contains("$flag!"), false);
- expect(cs.containsAll(gc("$flag!")), true);
-
- expect(cs.takeWhile((x) => x != " ").toString(), "Hi");
- expect(cs.takeLastWhile((x) => x != " ").toString(), "$flag!");
- expect(cs.skipWhile((x) => x != " ").toString(), " $flag!");
- expect(cs.skipLastWhile((x) => x != " ").toString(), "Hi ");
-
- expect(cs.findFirst(gc("")).moveBack(), false);
- expect(cs.findFirst(gc(flag)).current, flag);
- expect(cs.findLast(gc(flag)).current, flag);
- expect(cs.iterator.moveNext(), true);
- expect(cs.iterator.moveBack(), false);
- expect((cs.iterator..moveNext()).current, "H");
- expect(cs.iteratorAtEnd.moveNext(), false);
- expect(cs.iteratorAtEnd.moveBack(), true);
- expect((cs.iteratorAtEnd..moveBack()).current, "!");
- });
-
- testParts(gc("a"), gc("b"), gc("c"), gc("d"), gc("e"));
-
- // Composite pictogram example, from https://en.wikipedia.org/wiki/Zero-width_joiner.
- var flag = "\u{1f3f3}"; // U+1F3F3, Flag, waving. Category Pictogram.
- var white = "\ufe0f"; // U+FE0F, Variant selector 16. Category Extend.
- var zwj = "\u200d"; // U+200D, ZWJ
- var rainbow = "\u{1f308}"; // U+1F308, Rainbow. Category Pictogram
-
- testParts(gc("$flag$white$zwj$rainbow"), gc("$flag$white"), gc("$rainbow"),
- gc("$flag$zwj$rainbow"), gc("!"));
- });
-}
-
-void tests() {
- test("empty", () {
- expectGC(gc(""), []);
- });
- group("gc-ASCII", () {
- for (var text in [
- "",
- "A",
- "123456abcdefab",
- ]) {
- test('"$text"', () {
- expectGC(gc(text), charsOf(text));
- });
- }
- test("CR+NL", () {
- expectGC(gc("a\r\nb"), ["a", "\r\n", "b"]);
- expectGC(gc("a\n\rb"), ["a", "\n", "\r", "b"]);
- });
- });
- group("Non-ASCII single-code point", () {
- for (var text in [
- "à la mode",
- "rødgrød-æble-ål",
- ]) {
- test('"$text"', () {
- expectGC(gc(text), charsOf(text));
- });
- }
- });
- group("Combining marks", () {
- var text = "a\u0300 la mode";
- test('"$text"', () {
- expectGC(gc(text), ["a\u0300", " ", "l", "a", " ", "m", "o", "d", "e"]);
- });
- var text2 = "æble-a\u030Al";
- test('"$text2"', () {
- expectGC(gc(text2), ["æ", "b", "l", "e", "-", "a\u030A", "l"]);
- });
- });
-
- group("Regional Indicators", () {
- test('"π¦π©π°πΎπͺπΈ"', () {
- // Andorra, Cayman Islands, Spain.
- expectGC(gc("π¦π©π°πΎπͺπΈ"), ["π¦π©", "π°πΎ", "πͺπΈ"]);
- });
- test('"Xπ¦π©π°πΎπͺπΈ"', () {
- // Other, Andorra, Cayman Islands, Spain.
- expectGC(gc("Xπ¦π©π°πΎπͺπΈ"), ["X", "π¦π©", "π°πΎ", "πͺπΈ"]);
- });
- test('"π©π°πΎπͺπΈ"', () {
- // Denmark, Yemen, unmatched S.
- expectGC(gc("π©π°πΎπͺπΈ"), ["π©π°", "πΎπͺ", "πΈ"]);
- });
- test('"Xπ©π°πΎπͺπΈ"', () {
- // Other, Denmark, Yemen, unmatched S.
- expectGC(gc("Xπ©π°πΎπͺπΈ"), ["X", "π©π°", "πΎπͺ", "πΈ"]);
- });
- });
-
- group("Hangul", () {
- // Individual characters found on Wikipedia. Not expected to make sense.
- test('"μμλλ°"', () {
- expectGC(gc("μμλλ°"), ["μ", "μ", "λ", "λ°"]);
- });
- });
-
- group("Unicode test", () {
- for (var gcs in splitTests) {
- test("[${testDescription(gcs)}]", () {
- expectGC(gc(gcs.join()), gcs);
- });
- }
- });
-
- group("Emoji test", () {
- for (var gcs in emojis) {
- test("[${testDescription(gcs)}]", () {
- expectGC(gc(gcs.join()), gcs);
- });
- }
- });
-
- group("Zalgo test", () {
- for (var gcs in zalgo) {
- test("[${testDescription(gcs)}]", () {
- expectGC(gc(gcs.join()), gcs);
- });
- }
- });
-}
-
-// Converts text with no multi-code-point grapheme clusters into
-// list of grapheme clusters.
-List<String> charsOf(String text) =>
- text.runes.map((r) => String.fromCharCode(r)).toList();
-
-void expectGC(Characters actual, List<String> expected) {
- var text = expected.join();
-
- // Iterable operations.
- expect(actual.string, text);
- expect(actual.toString(), text);
- expect(actual.toList(), expected);
- expect(actual.length, expected.length);
- if (expected.isNotEmpty) {
- expect(actual.first, expected.first);
- expect(actual.last, expected.last);
- } else {
- expect(() => actual.first, throwsStateError);
- expect(() => actual.last, throwsStateError);
- }
- if (expected.length == 1) {
- expect(actual.single, expected.single);
- } else {
- expect(() => actual.single, throwsStateError);
- }
- expect(actual.isEmpty, expected.isEmpty);
- expect(actual.isNotEmpty, expected.isNotEmpty);
- expect(actual.contains(""), false);
- for (var char in expected) {
- expect(actual.contains(char), true);
- }
- for (int i = 1; i < expected.length; i++) {
- expect(actual.contains(expected[i - 1] + expected[i]), false);
- }
- expect(actual.skip(1).toList(), expected.skip(1).toList());
- expect(actual.take(1).toList(), expected.take(1).toList());
- expect(actual.skip(1).toString(), expected.skip(1).join());
- expect(actual.take(1).toString(), expected.take(1).join());
-
- if (expected.isNotEmpty) {
- expect(actual.skipLast(1).toList(),
- expected.take(expected.length - 1).toList());
- expect(actual.takeLast(1).toList(),
- expected.skip(expected.length - 1).toList());
- expect(actual.skipLast(1).toString(),
- expected.take(expected.length - 1).join());
- expect(actual.takeLast(1).toString(),
- expected.skip(expected.length - 1).join());
- }
- bool isEven(String s) => s.length.isEven;
-
- expect(
- actual.skipWhile(isEven).toList(), expected.skipWhile(isEven).toList());
- expect(
- actual.takeWhile(isEven).toList(), expected.takeWhile(isEven).toList());
- expect(
- actual.skipWhile(isEven).toString(), expected.skipWhile(isEven).join());
- expect(
- actual.takeWhile(isEven).toString(), expected.takeWhile(isEven).join());
-
- expect(actual.skipLastWhile(isEven).toString(),
- expected.toList().reversed.skipWhile(isEven).toList().reversed.join());
- expect(actual.takeLastWhile(isEven).toString(),
- expected.toList().reversed.takeWhile(isEven).toList().reversed.join());
-
- expect(actual.where(isEven).toString(), expected.where(isEven).join());
-
- expect((actual + actual).toString(), actual.string + actual.string);
-
- // Iteration.
- var it = actual.iterator;
- expect(it.isEmpty, true);
- for (var i = 0; i < expected.length; i++) {
- expect(it.moveNext(), true);
- expect(it.current, expected[i]);
-
- expect(actual.elementAt(i), expected[i]);
- expect(actual.skip(i).first, expected[i]);
- }
- expect(it.moveNext(), false);
- for (var i = expected.length - 1; i >= 0; i--) {
- expect(it.moveBack(), true);
- expect(it.current, expected[i]);
- }
- expect(it.moveBack(), false);
- expect(it.isEmpty, true);
-
- // GraphemeClusters operations.
- expect(actual.toUpperCase().string, text.toUpperCase());
- expect(actual.toLowerCase().string, text.toLowerCase());
-
- expect(actual.string, text);
-
- expect(actual.containsAll(gc("")), true);
- expect(actual.containsAll(actual), true);
- if (expected.isNotEmpty) {
- int steps = min(5, expected.length);
- for (int s = 0; s <= steps; s++) {
- int i = expected.length * s ~/ steps;
- expect(actual.startsWith(gc(expected.sublist(0, i).join())), true);
- expect(actual.endsWith(gc(expected.sublist(i).join())), true);
- for (int t = s + 1; t <= steps; t++) {
- int j = expected.length * t ~/ steps;
- var slice = expected.sublist(i, j).join();
- var gcs = gc(slice);
- expect(actual.containsAll(gcs), true);
- }
- }
- }
-
- {
- // Random walk back and forth.
- var it = actual.iterator;
- int pos = -1;
- if (random.nextBool()) {
- pos = expected.length;
- it = actual.iteratorAtEnd;
- }
- int steps = 5 + random.nextInt(expected.length * 2 + 1);
- bool lastMove = false;
- while (true) {
- bool back = false;
- if (pos < 0) {
- expect(lastMove, false);
- expect(it.isEmpty, true);
- } else if (pos >= expected.length) {
- expect(lastMove, false);
- expect(it.isEmpty, true);
- back = true;
- } else {
- expect(lastMove, true);
- expect(it.current, expected[pos]);
- back = random.nextBool();
- }
- if (--steps < 0) break;
- if (back) {
- lastMove = it.moveBack();
- pos -= 1;
- } else {
- lastMove = it.moveNext();
- pos += 1;
- }
- }
- }
-}
-
-Characters gc(String string) => Characters(string);
-
-void testParts(
- Characters a, Characters b, Characters c, Characters d, Characters e) {
- var cs = gc("$a$b$c$d$e");
- test("$cs", () {
- var it = cs.iterator;
- expect(it.isEmpty, true);
- expect(it.isNotEmpty, false);
- expect(it.current, "");
-
- // moveNext().
- expect(it.moveNext(), true);
- expect(it.isEmpty, false);
- expect(it.current, "$a");
- expect(it.moveNext(), true);
- expect(it.isEmpty, false);
- expect(it.current, "$b");
- expect(it.moveNext(), true);
- expect(it.isEmpty, false);
- expect(it.current, "$c");
- expect(it.moveNext(), true);
- expect(it.isEmpty, false);
- expect(it.current, "$d");
- expect(it.moveNext(), true);
- expect(it.isEmpty, false);
- expect(it.current, "$e");
- expect(it.moveNext(), false);
- expect(it.isEmpty, true);
- expect(it.current, "");
-
- // moveBack().
- expect(it.moveBack(), true);
- expect(it.isEmpty, false);
- expect(it.current, "$e");
- expect(it.moveBack(), true);
- expect(it.isEmpty, false);
- expect(it.current, "$d");
- expect(it.moveBack(), true);
- expect(it.isEmpty, false);
- expect(it.current, "$c");
- expect(it.moveBack(), true);
- expect(it.isEmpty, false);
- expect(it.current, "$b");
- expect(it.moveBack(), true);
- expect(it.isEmpty, false);
- expect(it.current, "$a");
- expect(it.moveBack(), false);
- expect(it.isEmpty, true);
- expect(it.current, "");
-
- // moveNext(int).
- expect(it.moveTo(c), true);
- expect(it.current, "$c");
- expect(it.moveTo(b), false);
- expect(it.moveTo(c), false);
- expect(it.current, "$c");
- expect(it.moveTo(d), true);
- expect(it.current, "$d");
-
- // moveBack(c).
- expect(it.moveBackTo(c), true);
- expect(it.current, "$c");
- expect(it.moveBackTo(d), false);
- expect(it.moveBackTo(c), false);
- expect(it.moveBackTo(a), true);
- expect(it.current, "$a");
-
- // moveNext(n)
- expect(it.moveBack(), false);
-
- expect(it.moveNext(2), true);
- expect(it.current, "$a$b");
- expect(it.moveNext(4), false);
- expect(it.current, "$c$d$e");
- expect(it.moveNext(0), true);
- expect(it.current, "");
- expect(it.moveNext(1), false);
- expect(it.current, "");
-
- // moveBack(n).
- expect(it.moveBack(2), true);
- expect(it.current, "$d$e");
- expect(it.moveBack(1), true);
- expect(it.current, "$c");
- expect(it.moveBack(3), false);
- expect(it.current, "$a$b");
- expect(it.moveBack(), false);
-
- // moveFirst.
- it.expandAll();
- expect(it.current, "$a$b$c$d$e");
- expect(it.collapseToFirst(b), true);
- expect(it.current, "$b");
- it.expandAll();
- expect(it.current, "$b$c$d$e");
- expect(it.collapseToFirst(a), false);
- expect(it.current, "$b$c$d$e");
-
- // moveBackTo
- it.expandBackAll();
- expect(it.current, "$a$b$c$d$e");
- expect(it.collapseToLast(c), true);
- expect(it.current, "$c");
-
- // includeNext/includePrevious
- expect(it.expandTo(e), true);
- expect(it.current, "$c$d$e");
- expect(it.expandTo(e), false);
- expect(it.expandBackTo(b), true);
- expect(it.current, "$b$c$d$e");
- expect(it.expandBackTo(b), false);
- expect(it.current, "$b$c$d$e");
- expect(it.collapseToFirst(c), true);
- expect(it.current, "$c");
-
- // includeUntilNext/expandBackUntil
- expect(it.expandBackUntil(a), true);
- expect(it.current, "$b$c");
- expect(it.expandBackUntil(a), true);
- expect(it.current, "$b$c");
- expect(it.expandUntil(e), true);
- expect(it.current, "$b$c$d");
- expect(it.expandUntil(e), true);
- expect(it.current, "$b$c$d");
-
- // dropFirst/dropLast
- expect(it.dropFirst(), true);
- expect(it.current, "$c$d");
- expect(it.dropLast(), true);
- expect(it.current, "$c");
- it.expandBackAll();
- it.expandAll();
- expect(it.current, "$a$b$c$d$e");
- expect(it.dropTo(b), true);
- expect(it.current, "$c$d$e");
- expect(it.dropBackTo(d), true);
- expect(it.current, "$c");
-
- it.expandBackAll();
- it.expandAll();
- expect(it.current, "$a$b$c$d$e");
-
- expect(it.dropUntil(b), true);
- expect(it.current, "$b$c$d$e");
- expect(it.dropBackUntil(d), true);
- expect(it.current, "$b$c$d");
-
- it.dropWhile((x) => x == b.string);
- expect(it.current, "$c$d");
- it.expandBackAll();
- expect(it.current, "$a$b$c$d");
- it.dropBackWhile((x) => x != b.string);
- expect(it.current, "$a$b");
- it.dropBackWhile((x) => false);
- expect(it.current, "$a$b");
-
- // include..While
- it.expandWhile((x) => false);
- expect(it.current, "$a$b");
- it.expandWhile((x) => x != e.string);
- expect(it.current, "$a$b$c$d");
- expect(it.collapseToFirst(c), true);
- expect(it.current, "$c");
- it.expandBackWhile((x) => false);
- expect(it.current, "$c");
- it.expandBackWhile((x) => x != a.string);
- expect(it.current, "$b$c");
-
- var cs2 = cs.replaceAll(c, gc(""));
- var cs3 = cs.replaceFirst(c, gc(""));
- var cs4 = cs.findFirst(c).replaceRange(gc("")).source;
- var cse = gc("$a$b$d$e");
- expect(cs2, cse);
- expect(cs3, cse);
- expect(cs4, cse);
- var cs5 = cs4.replaceAll(a, c);
- expect(cs5, gc("$c$b$d$e"));
- var cs6 = cs5.replaceAll(gc(""), a);
- expect(cs6, gc("$a$c$a$b$a$d$a$e$a"));
- var cs7 = cs6.replaceFirst(b, a);
- expect(cs7, gc("$a$c$a$a$a$d$a$e$a"));
- var cs8 = cs7.replaceFirst(e, a);
- expect(cs8, gc("$a$c$a$a$a$d$a$a$a"));
- var cs9 = cs8.replaceAll(a + a, b);
- expect(cs9, gc("$a$c$b$a$d$b$a"));
- it = cs9.iterator;
- it.moveTo(b + a);
- expect("$b$a", it.current);
- it.expandTo(b + a);
- expect("$b$a$d$b$a", it.current);
- var cs10 = it.replaceAll(b + a, e + e);
- expect(cs10.currentCharacters, e + e + d + e + e);
- expect(cs10.source, gc("$a$c$e$e$d$e$e"));
- var cs11 = it.replaceRange(e);
- expect(cs11.currentCharacters, e);
- expect(cs11.source, gc("$a$c$e"));
-
- var cs12 = gc("$a$b$a");
- expect(cs12.split(b), [a, a]);
- expect(cs12.split(a), [gc(""), b, gc("")]);
- expect(cs12.split(a, 2), [gc(""), gc("$b$a")]);
-
- expect(cs12.split(gc("")), [a, b, a]);
- expect(cs12.split(gc(""), 2), [a, gc("$b$a")]);
-
- expect(gc("").split(gc("")), [gc("")]);
-
- var cs13 = gc("$b$a$b$a$b$a");
- expect(cs13.split(b), [gc(""), a, a, a]);
- expect(cs13.split(b, 1), [cs13]);
- expect(cs13.split(b, 2), [gc(""), gc("$a$b$a$b$a")]);
- expect(cs13.split(b, 3), [gc(""), a, gc("$a$b$a")]);
- expect(cs13.split(b, 4), [gc(""), a, a, a]);
- expect(cs13.split(b, 5), [gc(""), a, a, a]);
- expect(cs13.split(b, 9999), [gc(""), a, a, a]);
- expect(cs13.split(b, 0), [gc(""), a, a, a]);
- expect(cs13.split(b, -1), [gc(""), a, a, a]);
- expect(cs13.split(b, -9999), [gc(""), a, a, a]);
-
- it = cs13.iterator..expandAll();
- expect(it.current, "$b$a$b$a$b$a");
- it.dropFirst();
- it.dropLast();
- expect(it.current, "$a$b$a$b");
- expect(it.split(a).map((range) => range.current), ["", "$b", "$b"]);
- expect(it.split(a, 2).map((range) => range.current), ["", "$b$a$b"]);
- // Each split is after an *a*.
- bool first = true;
- for (var range in it.split(a)) {
- if (range.isEmpty) {
- // First range is empty.
- expect(first, true);
- first = false;
- continue;
- }
- // Later ranges are "b" that come after "a".
- expect(range.current, "$b");
- range.moveBack();
- expect(range.current, "$a");
- }
-
- expect(it.split(gc("")).map((range) => range.current),
- ["$a", "$b", "$a", "$b"]);
-
- expect(gc("").iterator.split(gc("")).map((range) => range.current), [""]);
-
- expect(cs.startsWith(gc("")), true);
- expect(cs.startsWith(a), true);
- expect(cs.startsWith(a + b), true);
- expect(cs.startsWith(gc("$a$b$c")), true);
- expect(cs.startsWith(gc("$a$b$c$d")), true);
- expect(cs.startsWith(gc("$a$b$c$d$e")), true);
- expect(cs.startsWith(b), false);
- expect(cs.startsWith(c), false);
- expect(cs.startsWith(d), false);
- expect(cs.startsWith(e), false);
-
- expect(cs.endsWith(gc("")), true);
- expect(cs.endsWith(e), true);
- expect(cs.endsWith(d + e), true);
- expect(cs.endsWith(gc("$c$d$e")), true);
- expect(cs.endsWith(gc("$b$c$d$e")), true);
- expect(cs.endsWith(gc("$a$b$c$d$e")), true);
- expect(cs.endsWith(d), false);
- expect(cs.endsWith(c), false);
- expect(cs.endsWith(b), false);
- expect(cs.endsWith(a), false);
-
- it = cs.findFirst(b + c);
- expect(it.startsWith(gc("")), true);
- expect(it.startsWith(b), true);
- expect(it.startsWith(b + c), true);
- expect(it.startsWith(a + b + c), false);
- expect(it.startsWith(b + c + d), false);
- expect(it.startsWith(a), false);
-
- expect(it.endsWith(gc("")), true);
- expect(it.endsWith(c), true);
- expect(it.endsWith(b + c), true);
- expect(it.endsWith(a + b + c), false);
- expect(it.endsWith(b + c + d), false);
- expect(it.endsWith(d), false);
-
- it.collapseToFirst(c);
- expect(it.isPrecededBy(gc("")), true);
- expect(it.isPrecededBy(b), true);
- expect(it.isPrecededBy(a + b), true);
- expect(it.isPrecededBy(a + b + c), false);
- expect(it.isPrecededBy(a), false);
-
- expect(it.isFollowedBy(gc("")), true);
- expect(it.isFollowedBy(d), true);
- expect(it.isFollowedBy(d + e), true);
- expect(it.isFollowedBy(c + d + e), false);
- expect(it.isFollowedBy(e), false);
- });
- test("replace methods", () {
- // Unicode grapheme breaking character classes,
- // represented by their first value.
-
- var pattern = gc("\t"); // A non-combining entry to be replaced.
- var non = gc("");
-
- var c = otr + cr + pattern + lf + pic + pattern + zwj + pic + otr;
- var r = c.replaceAll(pattern, non);
- expect(r, otr + cr + lf + pic + zwj + pic + otr);
- var ci = c.iterator..moveNextAll();
- var ri = ci.replaceAll(pattern, non);
- expect(ri.currentCharacters, otr + cr + lf + pic + zwj + pic + otr);
- ci.dropFirst();
- ci.dropLast();
- expect(ci.currentCharacters, cr + pattern + lf + pic + pattern + zwj + pic);
- expect(ci.currentCharacters.length, 7);
- ri = ci.replaceAll(pattern, non);
- expect(ri.currentCharacters, cr + lf + pic + zwj + pic);
- expect(ri.currentCharacters.length, 2);
- ci.dropFirst();
- ci.dropLast(5);
- expect(ci.currentCharacters, pattern);
- ri = ci.replaceAll(pattern, non);
- expect(ri.currentCharacters, cr + lf);
- ci.moveNext(2);
- ci.moveNext(1);
- expect(ci.currentCharacters, pattern);
- ri = ci.replaceAll(pattern, non);
- expect(ri.currentCharacters, pic + zwj + pic);
-
- c = otr + pic + ext + pattern + pic + ext + otr;
- expect(c.length, 5);
- ci = c.iterator..moveTo(pattern);
- expect(ci.currentCharacters, pattern);
- ri = ci.replaceAll(pattern, zwj);
- expect(ri.currentCharacters, pic + ext + zwj + pic + ext);
-
- c = reg + pattern + reg + reg;
- ci = c.iterator..moveTo(pattern);
- ri = ci.replaceRange(non);
- expect(ri.currentCharacters, reg + reg);
- expect(ri.moveNext(), true);
- expect(ri.currentCharacters, reg);
- });
-}
-
-/// Sample characters from each breaking algorithm category.
-final Characters ctl = gc("\x00"); // Control, NUL.
-final Characters cr = gc("\r"); // Carriage Return, CR.
-final Characters lf = gc("\n"); // Newline, NL.
-final Characters otr = gc(" "); // Other, Space.
-final Characters ext = gc("\u0300"); // Extend, Combining Grave Accent.
-final Characters spc = gc("\u0903"); // Spacing Mark, Devanagari Sign Visarga.
-final Characters pre = gc("\u0600"); // Prepend, Arabic Number Sign.
-final Characters zwj = gc("\u200d"); // Zero-Width Joiner.
-final Characters pic = gc("\u00a9"); // Extended Pictographic, Copyright.
-final Characters reg = gc("\u{1f1e6}"); // Regional Identifier "a".
-final Characters hanl = gc("\u1100"); // Hangul L, Choseong Kiyeok.
-final Characters hanv = gc("\u1160"); // Hangul V, Jungseong Filler.
-final Characters hant = gc("\u11a8"); // Hangul T, Jongseong Kiyeok.
-final Characters hanlv = gc("\uac00"); // Hangul LV, Syllable Ga.
-final Characters hanlvt = gc("\uac01"); // Hangul LVT, Syllable Gag.
+// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// Unsound entry point. Use until all dependencies are sound.
+// Then move `characters_test.dart` back out from `sound_tests/`.
+
+// @dart=2.8
+import 'sound_tests/characters_test.dart' as sound;
+
+void main() {
+ sound.main();
+}
diff --git a/test/sound_tests/characters_test.dart b/test/sound_tests/characters_test.dart
new file mode 100644
index 0000000..5fe41fe
--- /dev/null
+++ b/test/sound_tests/characters_test.dart
@@ -0,0 +1,668 @@
+// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import "dart:math";
+
+import "package:test/test.dart";
+
+import "package:characters/characters.dart";
+
+import "../src/unicode_tests.dart";
+import "../src/unicode_grapheme_tests.dart";
+import "../src/various_tests.dart";
+
+late Random random;
+
+void main([List<String>? args]) {
+ // Ensure random seed is part of every test failure message,
+ // and that it can be reapplied for testing.
+ var seed = (args != null && args.isNotEmpty)
+ ? int.parse(args[0])
+ : Random().nextInt(0x3FFFFFFF);
+ random = Random(seed);
+ group("[Random Seed: $seed]", tests);
+ group("characters", () {
+ test("operations", () {
+ var flag = "\u{1F1E9}\u{1F1F0}"; // Regional Indicators "DK".
+ var string = "Hi $flag!";
+ expect(string.length, 8);
+ var cs = gc(string);
+ expect(cs.length, 5);
+ expect(cs.toList(), ["H", "i", " ", flag, "!"]);
+ expect(cs.skip(2).toString(), " $flag!");
+ expect(cs.skipLast(2).toString(), "Hi ");
+ expect(cs.take(2).toString(), "Hi");
+ expect(cs.takeLast(2).toString(), "$flag!");
+
+ expect(cs.contains("\u{1F1E9}"), false);
+ expect(cs.contains(flag), true);
+ expect(cs.contains("$flag!"), false);
+ expect(cs.containsAll(gc("$flag!")), true);
+
+ expect(cs.takeWhile((x) => x != " ").toString(), "Hi");
+ expect(cs.takeLastWhile((x) => x != " ").toString(), "$flag!");
+ expect(cs.skipWhile((x) => x != " ").toString(), " $flag!");
+ expect(cs.skipLastWhile((x) => x != " ").toString(), "Hi ");
+
+ expect(cs.findFirst(gc(""))!.moveBack(), false);
+ expect(cs.findFirst(gc(flag))!.current, flag);
+ expect(cs.findLast(gc(flag))!.current, flag);
+ expect(cs.iterator.moveNext(), true);
+ expect(cs.iterator.moveBack(), false);
+ expect((cs.iterator..moveNext()).current, "H");
+ expect(cs.iteratorAtEnd.moveNext(), false);
+ expect(cs.iteratorAtEnd.moveBack(), true);
+ expect((cs.iteratorAtEnd..moveBack()).current, "!");
+ });
+
+ testParts(gc("a"), gc("b"), gc("c"), gc("d"), gc("e"));
+
+ // Composite pictogram example, from https://en.wikipedia.org/wiki/Zero-width_joiner.
+ var flag = "\u{1f3f3}"; // U+1F3F3, Flag, waving. Category Pictogram.
+ var white = "\ufe0f"; // U+FE0F, Variant selector 16. Category Extend.
+ var zwj = "\u200d"; // U+200D, ZWJ
+ var rainbow = "\u{1f308}"; // U+1F308, Rainbow. Category Pictogram
+
+ testParts(gc("$flag$white$zwj$rainbow"), gc("$flag$white"), gc("$rainbow"),
+ gc("$flag$zwj$rainbow"), gc("!"));
+ });
+}
+
+void tests() {
+ test("empty", () {
+ expectGC(gc(""), []);
+ });
+ group("gc-ASCII", () {
+ for (var text in [
+ "",
+ "A",
+ "123456abcdefab",
+ ]) {
+ test('"$text"', () {
+ expectGC(gc(text), charsOf(text));
+ });
+ }
+ test("CR+NL", () {
+ expectGC(gc("a\r\nb"), ["a", "\r\n", "b"]);
+ expectGC(gc("a\n\rb"), ["a", "\n", "\r", "b"]);
+ });
+ });
+ group("Non-ASCII single-code point", () {
+ for (var text in [
+ "à la mode",
+ "rødgrød-æble-ål",
+ ]) {
+ test('"$text"', () {
+ expectGC(gc(text), charsOf(text));
+ });
+ }
+ });
+ group("Combining marks", () {
+ var text = "a\u0300 la mode";
+ test('"$text"', () {
+ expectGC(gc(text), ["a\u0300", " ", "l", "a", " ", "m", "o", "d", "e"]);
+ });
+ var text2 = "æble-a\u030Al";
+ test('"$text2"', () {
+ expectGC(gc(text2), ["æ", "b", "l", "e", "-", "a\u030A", "l"]);
+ });
+ });
+
+ group("Regional Indicators", () {
+ test('"π¦π©π°πΎπͺπΈ"', () {
+ // Andorra, Cayman Islands, Spain.
+ expectGC(gc("π¦π©π°πΎπͺπΈ"), ["π¦π©", "π°πΎ", "πͺπΈ"]);
+ });
+ test('"Xπ¦π©π°πΎπͺπΈ"', () {
+ // Other, Andorra, Cayman Islands, Spain.
+ expectGC(gc("Xπ¦π©π°πΎπͺπΈ"), ["X", "π¦π©", "π°πΎ", "πͺπΈ"]);
+ });
+ test('"π©π°πΎπͺπΈ"', () {
+ // Denmark, Yemen, unmatched S.
+ expectGC(gc("π©π°πΎπͺπΈ"), ["π©π°", "πΎπͺ", "πΈ"]);
+ });
+ test('"Xπ©π°πΎπͺπΈ"', () {
+ // Other, Denmark, Yemen, unmatched S.
+ expectGC(gc("Xπ©π°πΎπͺπΈ"), ["X", "π©π°", "πΎπͺ", "πΈ"]);
+ });
+ });
+
+ group("Hangul", () {
+ // Individual characters found on Wikipedia. Not expected to make sense.
+ test('"μμλλ°"', () {
+ expectGC(gc("μμλλ°"), ["μ", "μ", "λ", "λ°"]);
+ });
+ });
+
+ group("Unicode test", () {
+ for (var gcs in splitTests) {
+ test("[${testDescription(gcs)}]", () {
+ expectGC(gc(gcs.join()), gcs);
+ });
+ }
+ });
+
+ group("Emoji test", () {
+ for (var gcs in emojis) {
+ test("[${testDescription(gcs)}]", () {
+ expectGC(gc(gcs.join()), gcs);
+ });
+ }
+ });
+
+ group("Zalgo test", () {
+ for (var gcs in zalgo) {
+ test("[${testDescription(gcs)}]", () {
+ expectGC(gc(gcs.join()), gcs);
+ });
+ }
+ });
+}
+
+// Converts text with no multi-code-point grapheme clusters into
+// list of grapheme clusters.
+List<String> charsOf(String text) =>
+ text.runes.map((r) => String.fromCharCode(r)).toList();
+
+void expectGC(Characters actual, List<String> expected) {
+ var text = expected.join();
+
+ // Iterable operations.
+ expect(actual.string, text);
+ expect(actual.toString(), text);
+ expect(actual.toList(), expected);
+ expect(actual.length, expected.length);
+ if (expected.isNotEmpty) {
+ expect(actual.first, expected.first);
+ expect(actual.last, expected.last);
+ } else {
+ expect(() => actual.first, throwsStateError);
+ expect(() => actual.last, throwsStateError);
+ }
+ if (expected.length == 1) {
+ expect(actual.single, expected.single);
+ } else {
+ expect(() => actual.single, throwsStateError);
+ }
+ expect(actual.isEmpty, expected.isEmpty);
+ expect(actual.isNotEmpty, expected.isNotEmpty);
+ expect(actual.contains(""), false);
+ for (var char in expected) {
+ expect(actual.contains(char), true);
+ }
+ for (int i = 1; i < expected.length; i++) {
+ expect(actual.contains(expected[i - 1] + expected[i]), false);
+ }
+ expect(actual.skip(1).toList(), expected.skip(1).toList());
+ expect(actual.take(1).toList(), expected.take(1).toList());
+ expect(actual.skip(1).toString(), expected.skip(1).join());
+ expect(actual.take(1).toString(), expected.take(1).join());
+
+ if (expected.isNotEmpty) {
+ expect(actual.skipLast(1).toList(),
+ expected.take(expected.length - 1).toList());
+ expect(actual.takeLast(1).toList(),
+ expected.skip(expected.length - 1).toList());
+ expect(actual.skipLast(1).toString(),
+ expected.take(expected.length - 1).join());
+ expect(actual.takeLast(1).toString(),
+ expected.skip(expected.length - 1).join());
+ }
+ bool isEven(String s) => s.length.isEven;
+
+ expect(
+ actual.skipWhile(isEven).toList(), expected.skipWhile(isEven).toList());
+ expect(
+ actual.takeWhile(isEven).toList(), expected.takeWhile(isEven).toList());
+ expect(
+ actual.skipWhile(isEven).toString(), expected.skipWhile(isEven).join());
+ expect(
+ actual.takeWhile(isEven).toString(), expected.takeWhile(isEven).join());
+
+ expect(actual.skipLastWhile(isEven).toString(),
+ expected.toList().reversed.skipWhile(isEven).toList().reversed.join());
+ expect(actual.takeLastWhile(isEven).toString(),
+ expected.toList().reversed.takeWhile(isEven).toList().reversed.join());
+
+ expect(actual.where(isEven).toString(), expected.where(isEven).join());
+
+ expect((actual + actual).toString(), actual.string + actual.string);
+
+ // Iteration.
+ var it = actual.iterator;
+ expect(it.isEmpty, true);
+ for (var i = 0; i < expected.length; i++) {
+ expect(it.moveNext(), true);
+ expect(it.current, expected[i]);
+
+ expect(actual.elementAt(i), expected[i]);
+ expect(actual.skip(i).first, expected[i]);
+ }
+ expect(it.moveNext(), false);
+ for (var i = expected.length - 1; i >= 0; i--) {
+ expect(it.moveBack(), true);
+ expect(it.current, expected[i]);
+ }
+ expect(it.moveBack(), false);
+ expect(it.isEmpty, true);
+
+ // GraphemeClusters operations.
+ expect(actual.toUpperCase().string, text.toUpperCase());
+ expect(actual.toLowerCase().string, text.toLowerCase());
+
+ expect(actual.string, text);
+
+ expect(actual.containsAll(gc("")), true);
+ expect(actual.containsAll(actual), true);
+ if (expected.isNotEmpty) {
+ int steps = min(5, expected.length);
+ for (int s = 0; s <= steps; s++) {
+ int i = expected.length * s ~/ steps;
+ expect(actual.startsWith(gc(expected.sublist(0, i).join())), true);
+ expect(actual.endsWith(gc(expected.sublist(i).join())), true);
+ for (int t = s + 1; t <= steps; t++) {
+ int j = expected.length * t ~/ steps;
+ var slice = expected.sublist(i, j).join();
+ var gcs = gc(slice);
+ expect(actual.containsAll(gcs), true);
+ }
+ }
+ }
+
+ {
+ // Random walk back and forth.
+ var it = actual.iterator;
+ int pos = -1;
+ if (random.nextBool()) {
+ pos = expected.length;
+ it = actual.iteratorAtEnd;
+ }
+ int steps = 5 + random.nextInt(expected.length * 2 + 1);
+ bool lastMove = false;
+ while (true) {
+ bool back = false;
+ if (pos < 0) {
+ expect(lastMove, false);
+ expect(it.isEmpty, true);
+ } else if (pos >= expected.length) {
+ expect(lastMove, false);
+ expect(it.isEmpty, true);
+ back = true;
+ } else {
+ expect(lastMove, true);
+ expect(it.current, expected[pos]);
+ back = random.nextBool();
+ }
+ if (--steps < 0) break;
+ if (back) {
+ lastMove = it.moveBack();
+ pos -= 1;
+ } else {
+ lastMove = it.moveNext();
+ pos += 1;
+ }
+ }
+ }
+}
+
+Characters gc(String string) => Characters(string);
+
+void testParts(
+ Characters a, Characters b, Characters c, Characters d, Characters e) {
+ var cs = gc("$a$b$c$d$e");
+ test("$cs", () {
+ var it = cs.iterator;
+ expect(it.isEmpty, true);
+ expect(it.isNotEmpty, false);
+ expect(it.current, "");
+
+ // moveNext().
+ expect(it.moveNext(), true);
+ expect(it.isEmpty, false);
+ expect(it.current, "$a");
+ expect(it.moveNext(), true);
+ expect(it.isEmpty, false);
+ expect(it.current, "$b");
+ expect(it.moveNext(), true);
+ expect(it.isEmpty, false);
+ expect(it.current, "$c");
+ expect(it.moveNext(), true);
+ expect(it.isEmpty, false);
+ expect(it.current, "$d");
+ expect(it.moveNext(), true);
+ expect(it.isEmpty, false);
+ expect(it.current, "$e");
+ expect(it.moveNext(), false);
+ expect(it.isEmpty, true);
+ expect(it.current, "");
+
+ // moveBack().
+ expect(it.moveBack(), true);
+ expect(it.isEmpty, false);
+ expect(it.current, "$e");
+ expect(it.moveBack(), true);
+ expect(it.isEmpty, false);
+ expect(it.current, "$d");
+ expect(it.moveBack(), true);
+ expect(it.isEmpty, false);
+ expect(it.current, "$c");
+ expect(it.moveBack(), true);
+ expect(it.isEmpty, false);
+ expect(it.current, "$b");
+ expect(it.moveBack(), true);
+ expect(it.isEmpty, false);
+ expect(it.current, "$a");
+ expect(it.moveBack(), false);
+ expect(it.isEmpty, true);
+ expect(it.current, "");
+
+ // moveNext(int).
+ expect(it.moveTo(c), true);
+ expect(it.current, "$c");
+ expect(it.moveTo(b), false);
+ expect(it.moveTo(c), false);
+ expect(it.current, "$c");
+ expect(it.moveTo(d), true);
+ expect(it.current, "$d");
+
+ // moveBack(c).
+ expect(it.moveBackTo(c), true);
+ expect(it.current, "$c");
+ expect(it.moveBackTo(d), false);
+ expect(it.moveBackTo(c), false);
+ expect(it.moveBackTo(a), true);
+ expect(it.current, "$a");
+
+ // moveNext(n)
+ expect(it.moveBack(), false);
+
+ expect(it.moveNext(2), true);
+ expect(it.current, "$a$b");
+ expect(it.moveNext(4), false);
+ expect(it.current, "$c$d$e");
+ expect(it.moveNext(0), true);
+ expect(it.current, "");
+ expect(it.moveNext(1), false);
+ expect(it.current, "");
+
+ // moveBack(n).
+ expect(it.moveBack(2), true);
+ expect(it.current, "$d$e");
+ expect(it.moveBack(1), true);
+ expect(it.current, "$c");
+ expect(it.moveBack(3), false);
+ expect(it.current, "$a$b");
+ expect(it.moveBack(), false);
+
+ // moveFirst.
+ it.expandAll();
+ expect(it.current, "$a$b$c$d$e");
+ expect(it.collapseToFirst(b), true);
+ expect(it.current, "$b");
+ it.expandAll();
+ expect(it.current, "$b$c$d$e");
+ expect(it.collapseToFirst(a), false);
+ expect(it.current, "$b$c$d$e");
+
+ // moveBackTo
+ it.expandBackAll();
+ expect(it.current, "$a$b$c$d$e");
+ expect(it.collapseToLast(c), true);
+ expect(it.current, "$c");
+
+ // includeNext/includePrevious
+ expect(it.expandTo(e), true);
+ expect(it.current, "$c$d$e");
+ expect(it.expandTo(e), false);
+ expect(it.expandBackTo(b), true);
+ expect(it.current, "$b$c$d$e");
+ expect(it.expandBackTo(b), false);
+ expect(it.current, "$b$c$d$e");
+ expect(it.collapseToFirst(c), true);
+ expect(it.current, "$c");
+
+ // includeUntilNext/expandBackUntil
+ expect(it.expandBackUntil(a), true);
+ expect(it.current, "$b$c");
+ expect(it.expandBackUntil(a), true);
+ expect(it.current, "$b$c");
+ expect(it.expandUntil(e), true);
+ expect(it.current, "$b$c$d");
+ expect(it.expandUntil(e), true);
+ expect(it.current, "$b$c$d");
+
+ // dropFirst/dropLast
+ expect(it.dropFirst(), true);
+ expect(it.current, "$c$d");
+ expect(it.dropLast(), true);
+ expect(it.current, "$c");
+ it.expandBackAll();
+ it.expandAll();
+ expect(it.current, "$a$b$c$d$e");
+ expect(it.dropTo(b), true);
+ expect(it.current, "$c$d$e");
+ expect(it.dropBackTo(d), true);
+ expect(it.current, "$c");
+
+ it.expandBackAll();
+ it.expandAll();
+ expect(it.current, "$a$b$c$d$e");
+
+ expect(it.dropUntil(b), true);
+ expect(it.current, "$b$c$d$e");
+ expect(it.dropBackUntil(d), true);
+ expect(it.current, "$b$c$d");
+
+ it.dropWhile((x) => x == b.string);
+ expect(it.current, "$c$d");
+ it.expandBackAll();
+ expect(it.current, "$a$b$c$d");
+ it.dropBackWhile((x) => x != b.string);
+ expect(it.current, "$a$b");
+ it.dropBackWhile((x) => false);
+ expect(it.current, "$a$b");
+
+ // include..While
+ it.expandWhile((x) => false);
+ expect(it.current, "$a$b");
+ it.expandWhile((x) => x != e.string);
+ expect(it.current, "$a$b$c$d");
+ expect(it.collapseToFirst(c), true);
+ expect(it.current, "$c");
+ it.expandBackWhile((x) => false);
+ expect(it.current, "$c");
+ it.expandBackWhile((x) => x != a.string);
+ expect(it.current, "$b$c");
+
+ var cs2 = cs.replaceAll(c, gc(""));
+ var cs3 = cs.replaceFirst(c, gc(""));
+ var cs4 = cs.findFirst(c)!.replaceRange(gc("")).source;
+ var cse = gc("$a$b$d$e");
+ expect(cs2, cse);
+ expect(cs3, cse);
+ expect(cs4, cse);
+ var cs5 = cs4.replaceAll(a, c);
+ expect(cs5, gc("$c$b$d$e"));
+ var cs6 = cs5.replaceAll(gc(""), a);
+ expect(cs6, gc("$a$c$a$b$a$d$a$e$a"));
+ var cs7 = cs6.replaceFirst(b, a);
+ expect(cs7, gc("$a$c$a$a$a$d$a$e$a"));
+ var cs8 = cs7.replaceFirst(e, a);
+ expect(cs8, gc("$a$c$a$a$a$d$a$a$a"));
+ var cs9 = cs8.replaceAll(a + a, b);
+ expect(cs9, gc("$a$c$b$a$d$b$a"));
+ it = cs9.iterator;
+ it.moveTo(b + a);
+ expect("$b$a", it.current);
+ it.expandTo(b + a);
+ expect("$b$a$d$b$a", it.current);
+ var cs10 = it.replaceAll(b + a, e + e)!;
+ expect(cs10.currentCharacters, e + e + d + e + e);
+ expect(cs10.source, gc("$a$c$e$e$d$e$e"));
+ var cs11 = it.replaceRange(e);
+ expect(cs11.currentCharacters, e);
+ expect(cs11.source, gc("$a$c$e"));
+
+ var cs12 = gc("$a$b$a");
+ expect(cs12.split(b), [a, a]);
+ expect(cs12.split(a), [gc(""), b, gc("")]);
+ expect(cs12.split(a, 2), [gc(""), gc("$b$a")]);
+
+ expect(cs12.split(gc("")), [a, b, a]);
+ expect(cs12.split(gc(""), 2), [a, gc("$b$a")]);
+
+ expect(gc("").split(gc("")), [gc("")]);
+
+ var cs13 = gc("$b$a$b$a$b$a");
+ expect(cs13.split(b), [gc(""), a, a, a]);
+ expect(cs13.split(b, 1), [cs13]);
+ expect(cs13.split(b, 2), [gc(""), gc("$a$b$a$b$a")]);
+ expect(cs13.split(b, 3), [gc(""), a, gc("$a$b$a")]);
+ expect(cs13.split(b, 4), [gc(""), a, a, a]);
+ expect(cs13.split(b, 5), [gc(""), a, a, a]);
+ expect(cs13.split(b, 9999), [gc(""), a, a, a]);
+ expect(cs13.split(b, 0), [gc(""), a, a, a]);
+ expect(cs13.split(b, -1), [gc(""), a, a, a]);
+ expect(cs13.split(b, -9999), [gc(""), a, a, a]);
+
+ it = cs13.iterator..expandAll();
+ expect(it.current, "$b$a$b$a$b$a");
+ it.dropFirst();
+ it.dropLast();
+ expect(it.current, "$a$b$a$b");
+ expect(it.split(a).map((range) => range.current), ["", "$b", "$b"]);
+ expect(it.split(a, 2).map((range) => range.current), ["", "$b$a$b"]);
+ // Each split is after an *a*.
+ bool first = true;
+ for (var range in it.split(a)) {
+ if (range.isEmpty) {
+ // First range is empty.
+ expect(first, true);
+ first = false;
+ continue;
+ }
+ // Later ranges are "b" that come after "a".
+ expect(range.current, "$b");
+ range.moveBack();
+ expect(range.current, "$a");
+ }
+
+ expect(it.split(gc("")).map((range) => range.current),
+ ["$a", "$b", "$a", "$b"]);
+
+ expect(gc("").iterator.split(gc("")).map((range) => range.current), [""]);
+
+ expect(cs.startsWith(gc("")), true);
+ expect(cs.startsWith(a), true);
+ expect(cs.startsWith(a + b), true);
+ expect(cs.startsWith(gc("$a$b$c")), true);
+ expect(cs.startsWith(gc("$a$b$c$d")), true);
+ expect(cs.startsWith(gc("$a$b$c$d$e")), true);
+ expect(cs.startsWith(b), false);
+ expect(cs.startsWith(c), false);
+ expect(cs.startsWith(d), false);
+ expect(cs.startsWith(e), false);
+
+ expect(cs.endsWith(gc("")), true);
+ expect(cs.endsWith(e), true);
+ expect(cs.endsWith(d + e), true);
+ expect(cs.endsWith(gc("$c$d$e")), true);
+ expect(cs.endsWith(gc("$b$c$d$e")), true);
+ expect(cs.endsWith(gc("$a$b$c$d$e")), true);
+ expect(cs.endsWith(d), false);
+ expect(cs.endsWith(c), false);
+ expect(cs.endsWith(b), false);
+ expect(cs.endsWith(a), false);
+
+ it = cs.findFirst(b + c)!;
+ expect(it.startsWith(gc("")), true);
+ expect(it.startsWith(b), true);
+ expect(it.startsWith(b + c), true);
+ expect(it.startsWith(a + b + c), false);
+ expect(it.startsWith(b + c + d), false);
+ expect(it.startsWith(a), false);
+
+ expect(it.endsWith(gc("")), true);
+ expect(it.endsWith(c), true);
+ expect(it.endsWith(b + c), true);
+ expect(it.endsWith(a + b + c), false);
+ expect(it.endsWith(b + c + d), false);
+ expect(it.endsWith(d), false);
+
+ it.collapseToFirst(c);
+ expect(it.isPrecededBy(gc("")), true);
+ expect(it.isPrecededBy(b), true);
+ expect(it.isPrecededBy(a + b), true);
+ expect(it.isPrecededBy(a + b + c), false);
+ expect(it.isPrecededBy(a), false);
+
+ expect(it.isFollowedBy(gc("")), true);
+ expect(it.isFollowedBy(d), true);
+ expect(it.isFollowedBy(d + e), true);
+ expect(it.isFollowedBy(c + d + e), false);
+ expect(it.isFollowedBy(e), false);
+ });
+ test("replace methods", () {
+ // Unicode grapheme breaking character classes,
+ // represented by their first value.
+
+ var pattern = gc("\t"); // A non-combining entry to be replaced.
+ var non = gc("");
+
+ var c = otr + cr + pattern + lf + pic + pattern + zwj + pic + otr;
+ var r = c.replaceAll(pattern, non);
+ expect(r, otr + cr + lf + pic + zwj + pic + otr);
+ var ci = c.iterator..moveNextAll();
+ var ri = ci.replaceAll(pattern, non)!;
+ expect(ri.currentCharacters, otr + cr + lf + pic + zwj + pic + otr);
+ ci.dropFirst();
+ ci.dropLast();
+ expect(ci.currentCharacters, cr + pattern + lf + pic + pattern + zwj + pic);
+ expect(ci.currentCharacters.length, 7);
+ ri = ci.replaceAll(pattern, non)!;
+ expect(ri.currentCharacters, cr + lf + pic + zwj + pic);
+ expect(ri.currentCharacters.length, 2);
+ ci.dropFirst();
+ ci.dropLast(5);
+ expect(ci.currentCharacters, pattern);
+ ri = ci.replaceAll(pattern, non)!;
+ expect(ri.currentCharacters, cr + lf);
+ ci.moveNext(2);
+ ci.moveNext(1);
+ expect(ci.currentCharacters, pattern);
+ ri = ci.replaceAll(pattern, non)!;
+ expect(ri.currentCharacters, pic + zwj + pic);
+
+ c = otr + pic + ext + pattern + pic + ext + otr;
+ expect(c.length, 5);
+ ci = c.iterator..moveTo(pattern);
+ expect(ci.currentCharacters, pattern);
+ ri = ci.replaceAll(pattern, zwj)!;
+ expect(ri.currentCharacters, pic + ext + zwj + pic + ext);
+
+ c = reg + pattern + reg + reg;
+ ci = c.iterator..moveTo(pattern);
+ ri = ci.replaceRange(non);
+ expect(ri.currentCharacters, reg + reg);
+ expect(ri.moveNext(), true);
+ expect(ri.currentCharacters, reg);
+ });
+}
+
+/// Sample characters from each breaking algorithm category.
+final Characters ctl = gc("\x00"); // Control, NUL.
+final Characters cr = gc("\r"); // Carriage Return, CR.
+final Characters lf = gc("\n"); // Newline, NL.
+final Characters otr = gc(" "); // Other, Space.
+final Characters ext = gc("\u0300"); // Extend, Combining Grave Accent.
+final Characters spc = gc("\u0903"); // Spacing Mark, Devanagari Sign Visarga.
+final Characters pre = gc("\u0600"); // Prepend, Arabic Number Sign.
+final Characters zwj = gc("\u200d"); // Zero-Width Joiner.
+final Characters pic = gc("\u00a9"); // Extended Pictographic, Copyright.
+final Characters reg = gc("\u{1f1e6}"); // Regional Identifier "a".
+final Characters hanl = gc("\u1100"); // Hangul L, Choseong Kiyeok.
+final Characters hanv = gc("\u1160"); // Hangul V, Jungseong Filler.
+final Characters hant = gc("\u11a8"); // Hangul T, Jongseong Kiyeok.
+final Characters hanlv = gc("\uac00"); // Hangul LV, Syllable Ga.
+final Characters hanlvt = gc("\uac01"); // Hangul LVT, Syllable Gag.
diff --git a/test/src/unicode_tests.dart b/test/src/unicode_tests.dart
index 740c966..23bc1ca 100644
--- a/test/src/unicode_tests.dart
+++ b/test/src/unicode_tests.dart
@@ -16,7 +16,7 @@
" ÷";
}
-var categoryName = List<String>(16)
+var categoryName = List<String>.filled(16, "")
..[categoryOther] = "Other"
..[categoryCR] = "CR"
..[categoryLF] = "LF"
