// 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:async';

import 'package:test_descriptor/test_descriptor.dart' as d;

import 'package:test/test.dart';

import '../io.dart';

void main() {
  test("reports when no tests are run", () async {
    await d.file("test.dart", "void main() {}").create();

    var test = await runTest(["test.dart"]);
    expect(test.stdout, emitsThrough(contains("No tests ran.")));
    await test.shouldExit(0);
  });

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

  test("runs several failing tests and reports when each fails", () {
    return _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 [E]
          oh no
          test.dart 6:33  main.<fn>

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

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

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

  test("includes the full stack trace with --verbose-trace", () async {
    await d.file("test.dart", """
import 'dart:async';

import 'package:test/test.dart';

void main() {
  test("failure", () => throw "oh no");
}
""").create();

    var test = await runTest(["--verbose-trace", "test.dart"]);
    expect(test.stdout, emitsThrough(contains("dart:isolate-patch")));
    await test.shouldExit(1);
  });

  test("runs failing tests along with successful tests", () {
    return _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 [E]
          oh no
          test.dart 6:33  main.<fn>

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

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

  test("always prints the full test name", () {
    return _expectReport("""
        test(
           'really gosh dang long test name. Even longer than that. No, yet '
               'longer. A little more... okay, that should do it.',
           () {});""", """
        +0: really gosh dang long test name. Even longer than that. No, yet longer. A little more... okay, that should do it.
        +1: All tests passed!""");
  });

  test("gracefully handles multiple test failures in a row", () {
    return _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 [E]
          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: Some tests failed.""");
  });

  group("print:", () {
    test("handles multiple prints", () {
      return _expectReport("""
        test('test', () {
          print("one");
          print("two");
          print("three");
          print("four");
        });""", """
        +0: test
        one
        two
        three
        four
        +1: All tests passed!""");
    });

    test("handles a print after the test completes", () {
      return _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', () async {
          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: wait
        +1: test
        one
        two
        three
        four
        +2: All tests passed!""");
    });

    test("interleaves prints and errors", () {
      return _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 [E]
          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 10:11  main.<fn>

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

  group("skip:", () {
    test("displays skipped tests separately", () {
      return _expectReport("""
          test('skip 1', () {}, skip: true);
          test('skip 2', () {}, skip: true);
          test('skip 3', () {}, skip: true);""", """
          +0: skip 1
          +0 ~1: skip 2
          +0 ~2: skip 3
          +0 ~3: All tests skipped.""");
    });

    test("displays a skipped group", () {
      return _expectReport("""
          group('skip', () {
            test('test 1', () {});
            test('test 2', () {});
            test('test 3', () {});
          }, skip: true);""", """
          +0: skip test 1
          +0 ~1: skip test 2
          +0 ~2: skip test 3
          +0 ~3: All tests skipped.""");
    });

    test("runs skipped tests along with successful tests", () {
      return _expectReport("""
          test('skip 1', () {}, skip: true);
          test('success 1', () {});
          test('skip 2', () {}, skip: true);
          test('success 2', () {});""", """
          +0: skip 1
          +0 ~1: success 1
          +1 ~1: skip 2
          +1 ~2: success 2
          +2 ~2: All tests passed!""");
    });

    test("runs skipped tests along with successful and failing tests", () {
      return _expectReport("""
          test('failure 1', () => throw new TestFailure('oh no'));
          test('skip 1', () {}, skip: true);
          test('success 1', () {});
          test('failure 2', () => throw new TestFailure('oh no'));
          test('skip 2', () {}, skip: true);
          test('success 2', () {});""", """
          +0: failure 1
          +0 -1: failure 1 [E]
            oh no
            test.dart 6:35  main.<fn>

          +0 -1: skip 1
          +0 ~1 -1: success 1
          +1 ~1 -1: failure 2
          +1 ~1 -2: failure 2 [E]
            oh no
            test.dart 9:35  main.<fn>

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

    test("displays the skip reason if available", () {
      return _expectReport("""
          test('skip 1', () {}, skip: 'some reason');
          test('skip 2', () {}, skip: 'or another');""", """
          +0: skip 1
            Skip: some reason
          +0 ~1: skip 2
            Skip: or another
          +0 ~2: All tests skipped.""");
    });

    test("runs skipped tests with --run-skipped", () {
      return _expectReport("""
          test('skip 1', () {}, skip: 'some reason');
          test('skip 2', () {}, skip: 'or another');""", """
          +0: skip 1
          +1: skip 2
          +2: All tests passed!""", args: ["--run-skipped"]);
    });
  });
}

Future _expectReport(String tests, String expected, {List<String> args}) async {
  d.file("test.dart", """
    import 'dart:async';

    import 'package:test/test.dart';

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

  var test = await runTest(["test.dart"]..addAll(args ?? []));
  await test.shouldExit();

  var stdoutLines = await test.stdoutStream().toList();

  // Remove excess trailing whitespace and trim off timestamps.
  var actual = stdoutLines.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");

  // In Dart 1.24, stack traces with Future constructors output as
  // `new Future` instead of `Future.Future`.
  // Support running tests in both old and new styles.
  expect(
      actual,
      anyOf(equals(expected),
          equals(expected.replaceAll(' Future.Future.', ' new Future.'))));
}