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// Copyright (c) 2011, 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.
// @dart = 2.9
import "package:expect/expect.dart";
void main() {
testOutOfRange();
testConcat();
testIndex();
testCodeUnitAt();
testEquals();
testEndsWith();
testStartsWith();
testIndexOf();
testLastIndexOf();
testContains();
testReplaceAll();
testCompareTo();
testCharCodes();
testRepeat();
testPadLeft();
testPadRight();
}
void testLength() {
String str = "";
for (var i = 0; i < 20; i++) {
testStringLength(i, str);
str += " ";
}
}
void testOutOfRange() {
String a = "Hello";
bool exception_caught = false;
try {
var c = a[20]; // Throw exception.
} on RangeError catch (e) {
exception_caught = true;
}
Expect.isTrue(exception_caught);
}
void testIndex() {
String str = "string";
for (int i = 0; i < str.length; i++) {
Expect.isTrue(str[i] is String);
testStringLength(1, str[i]);
}
}
void testCodeUnitAt() {
String str = "string";
for (int i = 0; i < str.length; i++) {
Expect.isTrue(str.codeUnitAt(i) is int);
}
}
void testConcat() {
var a = "One";
var b = "Four";
var c = a + b;
testStringLength(7, c);
Expect.equals("OneFour", c);
}
void testEquals() {
Expect.equals("str", "str");
Expect.equals("str", "s" + "t" + "r");
Expect.equals("s" + "t" + "r", "str");
Expect.isFalse("str" == "s");
Expect.isFalse("str" == "r");
Expect.isFalse("str" == "st");
Expect.isFalse("str" == "tr");
Expect.isFalse("s" == "str");
Expect.isFalse("r" == "str");
Expect.isFalse("st" == "str");
Expect.isFalse("tr" == "str");
Expect.isFalse("" == "s");
Expect.equals("", "");
}
void testEndsWith() {
Expect.isTrue("str".endsWith("r"));
Expect.isTrue("str".endsWith("tr"));
Expect.isTrue("str".endsWith("str"));
Expect.isFalse("str".endsWith("stri"));
Expect.isFalse("str".endsWith("t"));
Expect.isFalse("str".endsWith("st"));
Expect.isFalse("str".endsWith("s"));
Expect.isTrue("".endsWith(""));
Expect.isFalse("".endsWith("s"));
}
void testStartsWith() {
Expect.isTrue("str".startsWith("s"));
Expect.isTrue("str".startsWith("st"));
Expect.isTrue("str".startsWith("str"));
Expect.isFalse("str".startsWith("stri"));
Expect.isFalse("str".startsWith("r"));
Expect.isFalse("str".startsWith("tr"));
Expect.isFalse("str".startsWith("t"));
Expect.isTrue("".startsWith(""));
Expect.isFalse("".startsWith("s"));
Expect.isFalse("strstr".startsWith("s", 1));
Expect.isFalse("strstr".startsWith("s", 2));
Expect.isTrue("strstr".startsWith("s", 3));
Expect.isFalse("strstr".startsWith("s", 4));
Expect.isFalse("strstr".startsWith("st", 1));
Expect.isFalse("strstr".startsWith("st", 2));
Expect.isTrue("strstr".startsWith("st", 3));
Expect.isFalse("strstr".startsWith("st", 4));
Expect.isFalse("strstr".startsWith("str", 1));
Expect.isFalse("strstr".startsWith("str", 2));
Expect.isTrue("strstr".startsWith("str", 3));
Expect.isFalse("strstr".startsWith("str", 4));
Expect.isTrue("str".startsWith("", 0));
Expect.isTrue("str".startsWith("", 1));
Expect.isTrue("str".startsWith("", 2));
Expect.isTrue("str".startsWith("", 3));
Expect.throws(() => "str".startsWith("", -1));
Expect.throws(() => "str".startsWith("", 4));
var regexp = new RegExp("s(?:tr?)?");
Expect.isTrue("s".startsWith(regexp));
Expect.isTrue("st".startsWith(regexp));
Expect.isTrue("str".startsWith(regexp));
Expect.isTrue("sX".startsWith(regexp));
Expect.isTrue("stX".startsWith(regexp));
Expect.isTrue("strX".startsWith(regexp));
Expect.isFalse("".startsWith(regexp));
Expect.isFalse("astr".startsWith(regexp));
Expect.isTrue("".startsWith(new RegExp("")));
Expect.isTrue("".startsWith(new RegExp("a?")));
Expect.isFalse("strstr".startsWith(regexp, 1));
Expect.isFalse("strstr".startsWith(regexp, 2));
Expect.isTrue("strstr".startsWith(regexp, 3));
Expect.isFalse("strstr".startsWith(regexp, 4));
Expect.isTrue("str".startsWith(new RegExp(""), 0));
Expect.isTrue("str".startsWith(new RegExp(""), 1));
Expect.isTrue("str".startsWith(new RegExp(""), 2));
Expect.isTrue("str".startsWith(new RegExp(""), 3));
Expect.isTrue("str".startsWith(new RegExp("a?"), 0));
Expect.isTrue("str".startsWith(new RegExp("a?"), 1));
Expect.isTrue("str".startsWith(new RegExp("a?"), 2));
Expect.isTrue("str".startsWith(new RegExp("a?"), 3));
Expect.throws(() => "str".startsWith(regexp, -1));
Expect.throws(() => "str".startsWith(regexp, 4));
regexp = new RegExp("^str");
Expect.isTrue("strstr".startsWith(regexp));
Expect.isTrue("strstr".startsWith(regexp, 0));
Expect.isFalse("strstr".startsWith(regexp, 1));
Expect.isFalse("strstr".startsWith(regexp, 2));
Expect.isFalse("strstr".startsWith(regexp, 3)); // Second "str" isn't at ^.
}
void testIndexOf() {
Expect.equals(0, "str".indexOf("", 0));
Expect.equals(0, "".indexOf("", 0));
Expect.equals(-1, "".indexOf("a", 0));
Expect.equals(1, "str".indexOf("t", 0));
Expect.equals(1, "str".indexOf("tr", 0));
Expect.equals(0, "str".indexOf("str", 0));
Expect.equals(0, "str".indexOf("st", 0));
Expect.equals(0, "str".indexOf("s", 0));
Expect.equals(2, "str".indexOf("r", 0));
Expect.equals(-1, "str".indexOf("string", 0));
Expect.equals(1, "strstr".indexOf("t", 0));
Expect.equals(1, "strstr".indexOf("tr", 0));
Expect.equals(0, "strstr".indexOf("str", 0));
Expect.equals(0, "strstr".indexOf("st", 0));
Expect.equals(0, "strstr".indexOf("s", 0));
Expect.equals(2, "strstr".indexOf("r", 0));
Expect.equals(-1, "str".indexOf("string", 0));
Expect.equals(4, "strstr".indexOf("t", 2));
Expect.equals(4, "strstr".indexOf("tr", 2));
Expect.equals(3, "strstr".indexOf("str", 1));
Expect.equals(3, "strstr".indexOf("str", 2));
Expect.equals(3, "strstr".indexOf("str", 3));
Expect.equals(3, "strstr".indexOf("st", 1));
Expect.equals(3, "strstr".indexOf("s", 3));
Expect.equals(5, "strstr".indexOf("r", 3));
Expect.equals(5, "strstr".indexOf("r", 4));
Expect.equals(5, "strstr".indexOf("r", 5));
String str = "hello";
for (int i = 0; i < 10; i++) {
if (i > str.length) {
Expect.throws(() => str.indexOf("", i));
} else {
int result = str.indexOf("", i);
Expect.equals(i, result);
}
}
var re = new RegExp("an?");
Expect.equals(1, "banana".indexOf(re));
Expect.equals(1, "banana".indexOf(re, 0));
Expect.equals(1, "banana".indexOf(re, 1));
Expect.equals(3, "banana".indexOf(re, 2));
Expect.equals(3, "banana".indexOf(re, 3));
Expect.equals(5, "banana".indexOf(re, 4));
Expect.equals(5, "banana".indexOf(re, 5));
Expect.equals(-1, "banana".indexOf(re, 6));
Expect.throws(() => "banana".indexOf(re, -1));
Expect.throws(() => "banana".indexOf(re, 7));
re = new RegExp("x?");
for (int i = 0; i <= str.length; i++) {
Expect.equals(i, str.indexOf(re, i));
}
}
void testLastIndexOf() {
Expect.equals(2, "str".lastIndexOf("", 2));
Expect.equals(0, "".lastIndexOf("", 0));
Expect.equals(-1, "".lastIndexOf("a", 0));
Expect.equals(1, "str".lastIndexOf("t", 2));
Expect.equals(1, "str".lastIndexOf("tr", 2));
Expect.equals(0, "str".lastIndexOf("str", 2));
Expect.equals(0, "str".lastIndexOf("st", 2));
Expect.equals(0, "str".lastIndexOf("s", 2));
Expect.equals(2, "str".lastIndexOf("r", 2));
Expect.equals(-1, "str".lastIndexOf("string", 2));
Expect.equals(4, "strstr".lastIndexOf("t", 5));
Expect.equals(4, "strstr".lastIndexOf("tr", 5));
Expect.equals(3, "strstr".lastIndexOf("str", 5));
Expect.equals(3, "strstr".lastIndexOf("st", 5));
Expect.equals(3, "strstr".lastIndexOf("s", 5));
Expect.equals(5, "strstr".lastIndexOf("r", 5));
Expect.throws(() {
"str".lastIndexOf("string", 5);
});
Expect.equals(4, "strstr".lastIndexOf("t", 5));
Expect.equals(4, "strstr".lastIndexOf("tr", 5));
Expect.equals(3, "strstr".lastIndexOf("str", 5));
Expect.equals(3, "strstr".lastIndexOf("str", 5));
Expect.equals(3, "strstr".lastIndexOf("str", 5));
Expect.equals(3, "strstr".lastIndexOf("st", 5));
Expect.equals(3, "strstr".lastIndexOf("s", 5));
Expect.equals(5, "strstr".lastIndexOf("r", 5));
Expect.equals(2, "strstr".lastIndexOf("r", 4));
Expect.equals(2, "strstr".lastIndexOf("r", 3));
Expect.equals(5, "strstr".lastIndexOf("r"));
Expect.equals(5, "strstr".lastIndexOf("r", null));
String str = "hello";
for (int i = 0; i < 10; i++) {
if (i > str.length) {
Expect.throws(() => str.indexOf("", i));
} else {
int result = str.lastIndexOf("", i);
Expect.equals(i, result);
}
}
var re = new RegExp("an?");
Expect.equals(5, "banana".lastIndexOf(re));
Expect.equals(5, "banana".lastIndexOf(re, 6));
Expect.equals(5, "banana".lastIndexOf(re, 5));
Expect.equals(3, "banana".lastIndexOf(re, 4));
Expect.equals(3, "banana".lastIndexOf(re, 3));
Expect.equals(1, "banana".lastIndexOf(re, 2));
Expect.equals(1, "banana".lastIndexOf(re, 1));
Expect.equals(-1, "banana".lastIndexOf(re, 0));
Expect.throws(() => "banana".lastIndexOf(re, -1));
Expect.throws(() => "banana".lastIndexOf(re, 7));
re = new RegExp("x?");
for (int i = 0; i <= str.length; i++) {
Expect.equals(i, str.indexOf(re, i));
}
}
void testContains() {
Expect.isTrue("str".contains("s", 0));
Expect.isTrue("str".contains("st", 0));
Expect.isTrue("str".contains("str", 0));
Expect.isTrue("str".contains("t", 0));
Expect.isTrue("str".contains("r", 0));
Expect.isTrue("str".contains("tr", 0));
Expect.isFalse("str".contains("sr", 0));
Expect.isFalse("str".contains("string", 0));
Expect.isTrue("str".contains("", 0));
Expect.isTrue("".contains("", 0));
Expect.isFalse("".contains("s", 0));
}
void testReplaceAll() {
Expect.equals("AtoBtoCDtoE", "AfromBfromCDfromE".replaceAll("from", "to"));
// Test with the replaced string at the beginning.
Expect.equals("toABtoCDtoE", "fromABfromCDfromE".replaceAll("from", "to"));
// Test with the replaced string at the end.
Expect.equals(
"toABtoCDtoEto", "fromABfromCDfromEfrom".replaceAll("from", "to"));
// Test when there are no occurrence of the string to replace.
Expect.equals("ABC", "ABC".replaceAll("from", "to"));
// Test when the string to change is the empty string.
Expect.equals("", "".replaceAll("from", "to"));
// Test when the string to change is a substring of the string to
// replace.
Expect.equals("fro", "fro".replaceAll("from", "to"));
// Test when the string to change is the replaced string.
Expect.equals("to", "from".replaceAll("from", "to"));
// Test when the string to change is the replacement string.
Expect.equals("to", "to".replaceAll("from", "to"));
// Test replacing by the empty string.
Expect.equals("", "from".replaceAll("from", ""));
Expect.equals("AB", "AfromB".replaceAll("from", ""));
// Test changing the empty string.
Expect.equals("to", "".replaceAll("", "to"));
// Test replacing the empty string.
Expect.equals("toAtoBtoCto", "ABC".replaceAll("", "to"));
}
void testCompareTo() {
Expect.equals(0, "".compareTo(""));
Expect.equals(0, "str".compareTo("str"));
Expect.equals(-1, "str".compareTo("string"));
Expect.equals(1, "string".compareTo("str"));
Expect.equals(1, "string".compareTo(""));
Expect.equals(-1, "".compareTo("string"));
}
void testCharCodes() {
test(str) {
var list = str.codeUnits;
Expect.equals(str.length, list.length);
for (int i = 0; i < str.length; i++) {
Expect.equals(str.codeUnitAt(i), list[i]);
}
}
test("abc");
test("");
test(" ");
}
void testStringLength(int length, String str) {
Expect.equals(length, str.length);
(length == 0 ? Expect.isTrue : Expect.isFalse)(str.isEmpty);
(length != 0 ? Expect.isTrue : Expect.isFalse)(str.isNotEmpty);
}
void testRepeat() {
List<String> testStrings = [
"",
"\x00",
"a",
"ab",
"\x80",
"\xff",
"\u2028",
"abcdef\u2028",
"\u{10002}",
"abcdef\u{10002}"
];
List<int> counts = [
0,
1,
2,
3,
4,
5,
6,
7,
8,
9,
10,
11,
12,
13,
14,
15,
16,
17,
127,
128,
129
];
void testRepeat(str, repeat) {
String expect;
if (repeat <= 0) {
expect = "";
} else if (repeat == 1) {
expect = str;
} else {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < repeat; i++) {
buf.write(str);
}
expect = buf.toString();
}
String actual = str * repeat;
Expect.equals(expect, actual, "$str#${str.length} * $repeat");
}
for (String str in testStrings) {
for (int repeat in counts) {
testRepeat(str, repeat);
}
}
}
void testPadLeft() {
Expect.equals(" 1", "1".padLeft(5, ' '));
Expect.equals(" 11", "11".padLeft(5, ' '));
Expect.equals(" 111", "111".padLeft(5, ' '));
Expect.equals(" 1111", "1111".padLeft(5, ' '));
Expect.equals("11111", "11111".padLeft(5, ' '));
Expect.equals("111111", "111111".padLeft(5, ' '));
Expect.equals(" \u{10002}", "\u{10002}".padLeft(5, ' '));
Expect.equals('', ''.padLeft(0, 'a'));
Expect.equals('a', ''.padLeft(1, 'a'));
Expect.equals('aaaaa', ''.padLeft(5, 'a'));
Expect.equals('', ''.padLeft(-2, 'a'));
Expect.equals('xyzxyzxyzxyzxyz', ''.padLeft(5, 'xyz'));
Expect.equals('xyzxyzxyzxyza', 'a'.padLeft(5, 'xyz'));
Expect.equals('xyzxyzxyzaa', 'aa'.padLeft(5, 'xyz'));
Expect.equals('\u{10002}\u{10002}\u{10002}aa', 'aa'.padLeft(5, '\u{10002}'));
Expect.equals('a', 'a'.padLeft(10, ''));
}
void testPadRight() {
Expect.equals("1 ", "1".padRight(5, ' '));
Expect.equals("11 ", "11".padRight(5, ' '));
Expect.equals("111 ", "111".padRight(5, ' '));
Expect.equals("1111 ", "1111".padRight(5, ' '));
Expect.equals("11111", "11111".padRight(5, ' '));
Expect.equals("111111", "111111".padRight(5, ' '));
Expect.equals("\u{10002} ", "\u{10002}".padRight(5, ' '));
Expect.equals('', ''.padRight(0, 'a'));
Expect.equals('a', ''.padRight(1, 'a'));
Expect.equals('aaaaa', ''.padRight(5, 'a'));
Expect.equals('', ''.padRight(-2, 'a'));
Expect.equals('xyzxyzxyzxyzxyz', ''.padRight(5, 'xyz'));
Expect.equals('axyzxyzxyzxyz', 'a'.padRight(5, 'xyz'));
Expect.equals('aaxyzxyzxyz', 'aa'.padRight(5, 'xyz'));
Expect.equals('aa\u{10002}\u{10002}\u{10002}', 'aa'.padRight(5, '\u{10002}'));
Expect.equals('a', 'a'.padRight(10, ''));
}