// Copyright (c) 2015, 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.

@TestOn("vm")

import 'dart:io';

import 'package:path/path.dart' as p;
import 'package:unittest/src/util/io.dart';
import 'package:unittest/unittest.dart';

import '../io.dart';

void main() {
  test("reports when no tests are run", () {
    return withTempDir((path) {
      new File(p.join(path, "test.dart")).writeAsStringSync("void main() {}");
      var result = runUnittest(["test.dart"], workingDirectory: path);
      expect(result.stdout, equals("No tests ran.\n"));
    });
  });

  test("runs several successful tests and reports when each completes", () {
    _expectReport("""
        test('success 1', () {});
        test('success 2', () {});
        test('success 3', () {});""",
        """
        +0: success 1
        +1: success 1
        +1: success 2
        +2: success 2
        +2: success 3
        +3: success 3
        +3: All tests passed!""");
  });

  test("runs several failing tests and reports when each fails", () {
    _expectReport("""
        test('failure 1', () => throw new TestFailure('oh no'));
        test('failure 2', () => throw new TestFailure('oh no'));
        test('failure 3', () => throw new TestFailure('oh no'));""",
        """
        +0: failure 1
        +0 -1: failure 1
          oh no
          test.dart 6:33  main.<fn>


        +0 -1: failure 2
        +0 -2: failure 2
          oh no
          test.dart 7:33  main.<fn>


        +0 -2: failure 3
        +0 -3: failure 3
          oh no
          test.dart 8:33  main.<fn>


        +0 -3: Some tests failed.""");
  });

  test("runs failing tests along with successful tests", () {
    _expectReport("""
        test('failure 1', () => throw new TestFailure('oh no'));
        test('success 1', () {});
        test('failure 2', () => throw new TestFailure('oh no'));
        test('success 2', () {});""",
        """
        +0: failure 1
        +0 -1: failure 1
          oh no
          test.dart 6:33  main.<fn>


        +0 -1: success 1
        +1 -1: success 1
        +1 -1: failure 2
        +1 -2: failure 2
          oh no
          test.dart 8:33  main.<fn>


        +1 -2: success 2
        +2 -2: success 2
        +2 -2: Some tests failed.""");
  });

  test("gracefully handles multiple test failures in a row", () {
    _expectReport("""
        // This completer ensures that the test isolate isn't killed until all
        // errors have been thrown.
        var completer = new Completer();
        test('failures', () {
          new Future.microtask(() => throw 'first error');
          new Future.microtask(() => throw 'second error');
          new Future.microtask(() => throw 'third error');
          new Future.microtask(completer.complete);
        });
        test('wait', () => completer.future);""",
        """
        +0: failures
        +0 -1: failures
          first error
          test.dart 10:38  main.<fn>.<fn>
          ===== asynchronous gap ===========================
          dart:async       Future.Future.microtask
          test.dart 10:15  main.<fn>

          second error
          test.dart 11:38  main.<fn>.<fn>
          ===== asynchronous gap ===========================
          dart:async       Future.Future.microtask
          test.dart 11:15  main.<fn>

          third error
          test.dart 12:38  main.<fn>.<fn>
          ===== asynchronous gap ===========================
          dart:async       Future.Future.microtask
          test.dart 12:15  main.<fn>


        +0 -1: wait
        +1 -1: wait
        +1 -1: Some tests failed.""");
  });

  group("print:", () {
    test("handles multiple prints", () {
      _expectReport("""
        test('test', () {
          print("one");
          print("two");
          print("three");
          print("four");
        });""",
        """
        +0: test
        one
        two
        three
        four

        +1: test
        +1: All tests passed!""");
    });

    test("handles a print after the test completes", () {
      _expectReport("""
        // This completer ensures that the test isolate isn't killed until all
        // prints have happened.
        var testDone = new Completer();
        var waitStarted = new Completer();
        test('test', () {
          waitStarted.future.then((_) {
            new Future(() => print("one"));
            new Future(() => print("two"));
            new Future(() => print("three"));
            new Future(() => print("four"));
            new Future(testDone.complete);
          });
        });

        test('wait', () {
          waitStarted.complete();
          return testDone.future;
        });""", """
        +0: test
        +1: test
        +1: wait
        +1: test
        one
        two
        three
        four

        +2: wait
        +2: All tests passed!""");
    });

    test("interleaves prints and errors", () {
      _expectReport("""
        // This completer ensures that the test isolate isn't killed until all
        // prints have happened.
        var completer = new Completer();
        test('test', () {
          scheduleMicrotask(() {
            print("three");
            print("four");
            throw "second error";
          });

          scheduleMicrotask(() {
            print("five");
            print("six");
            completer.complete();
          });

          print("one");
          print("two");
          throw "first error";
        });

        test('wait', () => completer.future);""",
        """
        +0: test
        one
        two

        +0 -1: test
          first error
          test.dart 24:11  main.<fn>

        three
        four
          second error
          test.dart 13:13  main.<fn>.<fn>
          ===== asynchronous gap ===========================
          dart:async       scheduleMicrotask
          test.dart 10:28  main.<fn>

        five
        six

        +0 -1: wait
        +1 -1: wait
        +1 -1: Some tests failed.""");
    });
  });
}

void _expectReport(String tests, String expected, {List<String> args}) {
  var dart = """
import 'dart:async';

import 'package:unittest/unittest.dart';

void main() {
$tests
}
""";

  expect(withTempDir((path) {
    new File(p.join(path, "test.dart")).writeAsStringSync(dart);
    if (args == null) args = [];
    args = args.toList()..add("test.dart");
    var result = runUnittest(args, workingDirectory: path);

    // Convert CRs into newlines, remove excess trailing whitespace, and trim
    // off timestamps.
    var actual = result.stdout.trim().split(new RegExp(r"[\r\n]")).map((line) {
      if (line.startsWith("  ") || line.isEmpty) return line.trimRight();
      return line.trim().replaceFirst(new RegExp("^[0-9]{2}:[0-9]{2} "), "");
    }).join("\n");

    // Un-indent the expected string.
    var indentation = expected.indexOf(new RegExp("[^ ]"));
    expected = expected.split("\n").map((line) {
      if (line.isEmpty) return line;
      return line.substring(indentation);
    }).join("\n");

    expect(actual, equals(expected));
  }), completes);
}