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1 | 1 | using NSubstitute;
|
2 | 2 |
|
3 |
| -namespace TfvcMigrator.Tests.EnumerableExtensionsTests |
| 3 | +namespace TfvcMigrator.Tests.EnumerableExtensionsTests; |
| 4 | + |
| 5 | +public static class WithLookaheadTests |
4 | 6 | {
|
5 |
| - public static class WithLookaheadTests |
| 7 | + [Test] |
| 8 | + public static async Task Current_value_should_not_become_available_before_MoveNextAsync_succeeds_asynchronously() |
6 | 9 | {
|
7 |
| - [Test] |
8 |
| - public static async Task Current_value_should_not_become_available_before_MoveNextAsync_succeeds_asynchronously() |
9 |
| - { |
10 |
| - var tcs = new TaskCompletionSource<bool>(); |
11 |
| - |
12 |
| - var inner = Substitute.For<IAsyncEnumerable<int>>(); |
13 |
| - inner.GetAsyncEnumerator().Current.Returns(42); |
14 |
| - inner.GetAsyncEnumerator().MoveNextAsync().Returns( |
15 |
| - new ValueTask<bool>(tcs.Task), |
16 |
| - new ValueTask<bool>(false)); |
17 |
| - |
18 |
| - var enumerator = inner.WithLookahead().GetAsyncEnumerator(); |
| 10 | + var tcs = new TaskCompletionSource<bool>(); |
19 | 11 |
|
20 |
| - enumerator.Current.ShouldBe(0); |
21 |
| - var moveNextTask = enumerator.MoveNextAsync(); |
22 |
| - enumerator.Current.ShouldBe(0); |
| 12 | + var inner = Substitute.For<IAsyncEnumerable<int>>(); |
| 13 | + inner.GetAsyncEnumerator().Current.Returns(42); |
| 14 | + inner.GetAsyncEnumerator().MoveNextAsync().Returns( |
| 15 | + new ValueTask<bool>(tcs.Task), |
| 16 | + new ValueTask<bool>(false)); |
23 | 17 |
|
24 |
| - tcs.SetResult(true); |
25 |
| - await moveNextTask; |
26 |
| - } |
| 18 | + var enumerator = inner.WithLookahead().GetAsyncEnumerator(); |
27 | 19 |
|
28 |
| - [Test] |
29 |
| - public static async Task Current_value_should_become_available_when_MoveNextAsync_succeeds_synchronously() |
30 |
| - { |
31 |
| - var inner = Substitute.For<IAsyncEnumerable<int>>(); |
32 |
| - inner.GetAsyncEnumerator().Current.Returns(42); |
33 |
| - inner.GetAsyncEnumerator().MoveNextAsync().Returns( |
34 |
| - new ValueTask<bool>(true), |
35 |
| - new ValueTask<bool>(false)); |
| 20 | + enumerator.Current.ShouldBe(0); |
| 21 | + var moveNextTask = enumerator.MoveNextAsync(); |
| 22 | + enumerator.Current.ShouldBe(0); |
36 | 23 |
|
37 |
| - var enumerator = inner.WithLookahead().GetAsyncEnumerator(); |
| 24 | + tcs.SetResult(true); |
| 25 | + await moveNextTask; |
| 26 | + } |
38 | 27 |
|
39 |
| - await enumerator.MoveNextAsync(); |
40 |
| - enumerator.Current.ShouldBe(42); |
41 |
| - } |
| 28 | + [Test] |
| 29 | + public static async Task Current_value_should_become_available_when_MoveNextAsync_succeeds_synchronously() |
| 30 | + { |
| 31 | + var inner = Substitute.For<IAsyncEnumerable<int>>(); |
| 32 | + inner.GetAsyncEnumerator().Current.Returns(42); |
| 33 | + inner.GetAsyncEnumerator().MoveNextAsync().Returns( |
| 34 | + new ValueTask<bool>(true), |
| 35 | + new ValueTask<bool>(false)); |
42 | 36 |
|
43 |
| - [Test] |
44 |
| - public static async Task Current_value_should_become_available_when_MoveNextAsync_succeeds_asynchronously() |
45 |
| - { |
46 |
| - var tcs = new TaskCompletionSource<bool>(); |
| 37 | + var enumerator = inner.WithLookahead().GetAsyncEnumerator(); |
47 | 38 |
|
48 |
| - var inner = Substitute.For<IAsyncEnumerable<int>>(); |
49 |
| - inner.GetAsyncEnumerator().Current.Returns(42); |
50 |
| - inner.GetAsyncEnumerator().MoveNextAsync().Returns( |
51 |
| - new ValueTask<bool>(tcs.Task), |
52 |
| - new ValueTask<bool>(false)); |
| 39 | + await enumerator.MoveNextAsync(); |
| 40 | + enumerator.Current.ShouldBe(42); |
| 41 | + } |
53 | 42 |
|
54 |
| - var enumerator = inner.WithLookahead().GetAsyncEnumerator(); |
| 43 | + [Test] |
| 44 | + public static async Task Current_value_should_become_available_when_MoveNextAsync_succeeds_asynchronously() |
| 45 | + { |
| 46 | + var tcs = new TaskCompletionSource<bool>(); |
55 | 47 |
|
56 |
| - var moveNextTask = enumerator.MoveNextAsync(); |
57 |
| - tcs.SetResult(true); |
58 |
| - await moveNextTask; |
| 48 | + var inner = Substitute.For<IAsyncEnumerable<int>>(); |
| 49 | + inner.GetAsyncEnumerator().Current.Returns(42); |
| 50 | + inner.GetAsyncEnumerator().MoveNextAsync().Returns( |
| 51 | + new ValueTask<bool>(tcs.Task), |
| 52 | + new ValueTask<bool>(false)); |
59 | 53 |
|
60 |
| - enumerator.Current.ShouldBe(42); |
61 |
| - } |
| 54 | + var enumerator = inner.WithLookahead().GetAsyncEnumerator(); |
62 | 55 |
|
63 |
| - [Test] |
64 |
| - public static async Task Immediate_second_MoveNextAsync_call_should_not_be_detected_as_overlapping() |
65 |
| - { |
66 |
| - var tcs = new TaskCompletionSource<bool>(); |
| 56 | + var moveNextTask = enumerator.MoveNextAsync(); |
| 57 | + tcs.SetResult(true); |
| 58 | + await moveNextTask; |
67 | 59 |
|
68 |
| - var inner = Substitute.For<IAsyncEnumerable<int>>(); |
69 |
| - inner.GetAsyncEnumerator().MoveNextAsync().Returns( |
70 |
| - new ValueTask<bool>(tcs.Task), |
71 |
| - new ValueTask<bool>(false)); |
| 60 | + enumerator.Current.ShouldBe(42); |
| 61 | + } |
72 | 62 |
|
73 |
| - var enumerator = inner.WithLookahead().GetAsyncEnumerator(); |
| 63 | + [Test] |
| 64 | + public static async Task Immediate_second_MoveNextAsync_call_should_not_be_detected_as_overlapping() |
| 65 | + { |
| 66 | + var tcs = new TaskCompletionSource<bool>(); |
74 | 67 |
|
75 |
| - var awaitAssertionsTask = CallAgainImmediatelyAfterAwaiting(); |
76 |
| - async Task CallAgainImmediatelyAfterAwaiting() |
77 |
| - { |
78 |
| - (await enumerator.MoveNextAsync()).ShouldBeTrue(); |
79 |
| - (await enumerator.MoveNextAsync()).ShouldBeFalse(); |
80 |
| - } |
| 68 | + var inner = Substitute.For<IAsyncEnumerable<int>>(); |
| 69 | + inner.GetAsyncEnumerator().MoveNextAsync().Returns( |
| 70 | + new ValueTask<bool>(tcs.Task), |
| 71 | + new ValueTask<bool>(false)); |
81 | 72 |
|
82 |
| - tcs.SetResult(true); |
| 73 | + var enumerator = inner.WithLookahead().GetAsyncEnumerator(); |
83 | 74 |
|
84 |
| - await awaitAssertionsTask; |
| 75 | + var awaitAssertionsTask = CallAgainImmediatelyAfterAwaiting(); |
| 76 | + async Task CallAgainImmediatelyAfterAwaiting() |
| 77 | + { |
| 78 | + (await enumerator.MoveNextAsync()).ShouldBeTrue(); |
| 79 | + (await enumerator.MoveNextAsync()).ShouldBeFalse(); |
85 | 80 | }
|
86 | 81 |
|
87 |
| - [Test] |
88 |
| - public static async Task MoveNextAsync_call_after_sync_fault_should_not_be_detected_as_overlapping() |
89 |
| - { |
90 |
| - var inner = Substitute.For<IAsyncEnumerable<int>>(); |
91 |
| - inner.GetAsyncEnumerator().MoveNextAsync().Returns( |
92 |
| - new ValueTask<bool>(Task.FromException<bool>(new Exception())), |
93 |
| - new ValueTask<bool>(false)); |
| 82 | + tcs.SetResult(true); |
94 | 83 |
|
95 |
| - var enumerator = inner.WithLookahead().GetAsyncEnumerator(); |
| 84 | + await awaitAssertionsTask; |
| 85 | + } |
96 | 86 |
|
97 |
| - await Should.ThrowAsync<Exception>(enumerator.MoveNextAsync().AsTask()); |
98 |
| - (await enumerator.MoveNextAsync()).ShouldBeFalse(); |
99 |
| - } |
| 87 | + [Test] |
| 88 | + public static async Task MoveNextAsync_call_after_sync_fault_should_not_be_detected_as_overlapping() |
| 89 | + { |
| 90 | + var inner = Substitute.For<IAsyncEnumerable<int>>(); |
| 91 | + inner.GetAsyncEnumerator().MoveNextAsync().Returns( |
| 92 | + new ValueTask<bool>(Task.FromException<bool>(new Exception())), |
| 93 | + new ValueTask<bool>(false)); |
100 | 94 |
|
101 |
| - [Test] |
102 |
| - public static async Task MoveNextAsync_call_after_async_fault_should_not_be_detected_as_overlapping() |
103 |
| - { |
104 |
| - var tcs = new TaskCompletionSource<bool>(); |
| 95 | + var enumerator = inner.WithLookahead().GetAsyncEnumerator(); |
105 | 96 |
|
106 |
| - var inner = Substitute.For<IAsyncEnumerable<int>>(); |
107 |
| - inner.GetAsyncEnumerator().MoveNextAsync().Returns( |
108 |
| - new ValueTask<bool>(tcs.Task), |
109 |
| - new ValueTask<bool>(false)); |
| 97 | + await Should.ThrowAsync<Exception>(enumerator.MoveNextAsync().AsTask()); |
| 98 | + (await enumerator.MoveNextAsync()).ShouldBeFalse(); |
| 99 | + } |
110 | 100 |
|
111 |
| - var enumerator = inner.WithLookahead().GetAsyncEnumerator(); |
| 101 | + [Test] |
| 102 | + public static async Task MoveNextAsync_call_after_async_fault_should_not_be_detected_as_overlapping() |
| 103 | + { |
| 104 | + var tcs = new TaskCompletionSource<bool>(); |
112 | 105 |
|
113 |
| - var awaitAssertionsTask = CallAgainImmediatelyAfterAwaiting(); |
114 |
| - async Task CallAgainImmediatelyAfterAwaiting() |
115 |
| - { |
116 |
| - await Should.ThrowAsync<Exception>(enumerator.MoveNextAsync().AsTask()); |
117 |
| - (await enumerator.MoveNextAsync()).ShouldBeFalse(); |
118 |
| - } |
| 106 | + var inner = Substitute.For<IAsyncEnumerable<int>>(); |
| 107 | + inner.GetAsyncEnumerator().MoveNextAsync().Returns( |
| 108 | + new ValueTask<bool>(tcs.Task), |
| 109 | + new ValueTask<bool>(false)); |
119 | 110 |
|
120 |
| - tcs.SetException(new Exception()); |
| 111 | + var enumerator = inner.WithLookahead().GetAsyncEnumerator(); |
121 | 112 |
|
122 |
| - await awaitAssertionsTask; |
| 113 | + var awaitAssertionsTask = CallAgainImmediatelyAfterAwaiting(); |
| 114 | + async Task CallAgainImmediatelyAfterAwaiting() |
| 115 | + { |
| 116 | + await Should.ThrowAsync<Exception>(enumerator.MoveNextAsync().AsTask()); |
| 117 | + (await enumerator.MoveNextAsync()).ShouldBeFalse(); |
123 | 118 | }
|
| 119 | + |
| 120 | + tcs.SetException(new Exception()); |
| 121 | + |
| 122 | + await awaitAssertionsTask; |
124 | 123 | }
|
125 | 124 | }
|
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