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Add UsingTestingSequence to enforce simpler & correct usage #475

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8bbcb79
Add UsingTestingSequence to enforce simpler & correct usage
atifaziz Apr 27, 2018
b6ea36c
Add Use for TestingSequence
atifaziz Apr 29, 2018
2db1cc3
Refactor CountDown tests
atifaziz Apr 29, 2018
3639c88
Refactor Fold tests
atifaziz Apr 30, 2018
68c418e
Merge branch 'master' into UsingTestSequence
atifaziz Nov 26, 2019
44afc77
Remove unused import
atifaziz Nov 26, 2019
96a187f
Merge branch 'master' into UsingTestSequence
atifaziz Jan 7, 2021
c6a4137
Merge remote-tracking branch 'upstream/master' into UsingTestSequence
atifaziz Jan 7, 2021
e7dfa49
Merge branch 'master' into UsingTestSequence
atifaziz Nov 30, 2022
c9a8732
Add missing final newline
atifaziz Nov 30, 2022
369576c
Use using statement
atifaziz Nov 30, 2022
e033922
Merge branch 'master' into UsingTestSequence
atifaziz Nov 30, 2022
22acf6f
Address "EndsWith" tests
atifaziz Nov 30, 2022
b39e8d7
Merge remote-tracking branch 'upstream/master' into UsingTestSequence
atifaziz Jan 14, 2023
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39 changes: 22 additions & 17 deletions MoreLinq.Test/RankTest.cs
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
namespace MoreLinq.Test
{
using System;
using System.Collections.Generic;
using NUnit.Framework;

/// <summary>
Expand Down Expand Up @@ -34,7 +35,8 @@ public void TestRankByIsLazy()
public void TestRankNullComparer()
{
var sequence = Enumerable.Repeat(1, 10);
sequence.AsTestingSequence().Rank(null).AssertSequenceEqual(sequence);
sequence.UsingTestingSequence(ts => ts.Rank(null))
.AssertSequenceEqual(sequence);
}

/// <summary>
Expand All @@ -44,7 +46,8 @@ public void TestRankNullComparer()
public void TestRankByNullComparer()
{
var sequence = Enumerable.Repeat(1, 10);
sequence.AsTestingSequence().RankBy(x => x, null).AssertSequenceEqual(sequence);
sequence.UsingTestingSequence(ts => ts.RankBy(x => x, null))
.AssertSequenceEqual(sequence);
}

/// <summary>
Expand All @@ -56,11 +59,11 @@ public void TestRankDescendingSequence()
{
const int count = 100;
var sequence = Enumerable.Range(456, count).Reverse();
var result = sequence.AsTestingSequence().Rank().ToArray();
var expectedResult = Enumerable.Range(1, count);

var result = sequence.UsingTestingSequence(ts => ts.Rank());

Assert.AreEqual(count, result.Length);
Assert.IsTrue(result.SequenceEqual(expectedResult));
Assert.IsTrue(result.SequenceEqual(Enumerable.Range(1, count)));
}

/// <summary>
Expand All @@ -72,11 +75,11 @@ public void TestRankByAscendingSeries()
{
const int count = 100;
var sequence = Enumerable.Range(456, count);
var result = sequence.AsTestingSequence().Rank().ToArray();
var expectedResult = Enumerable.Range(1, count).Reverse();

var result = sequence.UsingTestingSequence(ts => ts.Rank());

Assert.AreEqual(count, result.Length);
Assert.IsTrue(result.SequenceEqual(expectedResult));
Assert.IsTrue(result.SequenceEqual(Enumerable.Range(1, count).Reverse()));
}

/// <summary>
Expand All @@ -87,7 +90,7 @@ public void TestRankEquivalentItems()
{
const int count = 100;
var sequence = Enumerable.Repeat(1234, count);
var result = sequence.AsTestingSequence().Rank().ToArray();
var result = sequence.UsingTestingSequence(ts => ts.Rank());

Assert.AreEqual(count, result.Length);
Assert.IsTrue(result.SequenceEqual(Enumerable.Repeat(1, count)));
Expand All @@ -103,7 +106,8 @@ public void TestRankGroupedItems()
var sequence = Enumerable.Range(0, count)
.Concat(Enumerable.Range(0, count))
.Concat(Enumerable.Range(0, count));
var result = sequence.AsTestingSequence().Rank();

var result = sequence.UsingTestingSequence(ts => ts.Rank());

Assert.AreEqual(count, result.Distinct().Count());
Assert.IsTrue(result.SequenceEqual(sequence.Reverse().Select(x => x + 1)));
Expand All @@ -115,11 +119,11 @@ public void TestRankGroupedItems()
[Test]
public void TestRankOfHighestItemIsOne()
{
const int count = 10;
var sequence = Enumerable.Range(1, count);
var result = sequence.AsTestingSequence().Rank();
var result =
Enumerable.Range(1, 10).UsingTestingSequence(ts =>
ts.Rank().OrderBy(x => x).First());

Assert.AreEqual(1, result.OrderBy(x => x).First());
Assert.AreEqual(1, result);
}

/// <summary>
Expand All @@ -139,7 +143,8 @@ public void TestRankByKeySelector()
new { Name = "Jim", Age = 74, ExpectedRank = 1 },
new { Name = "Jes", Age = 11, ExpectedRank = 8 },
};
var result = sequence.AsTestingSequence().RankBy(x => x.Age).ToArray();
var result = sequence.UsingTestingSequence(ts =>
ts.RankBy(x => x.Age));

Assert.AreEqual(sequence.Length, result.Length);
Assert.IsTrue(result.SequenceEqual(sequence.Select(x => x.ExpectedRank)));
Expand All @@ -155,8 +160,8 @@ public void TestRankCustomComparer()
var ordinals = Enumerable.Range(1, count);
var sequence = ordinals.Select( x => new DateTime(2010,x,20-x) );
// invert the CompareTo operation to Rank in reverse order (ascening to descending)
var resultA = sequence.AsTestingSequence().Rank(Comparer.Create<DateTime>((a, b) => -a.CompareTo(b)));
var resultB = sequence.AsTestingSequence().RankBy(x => x.Day, Comparer.Create<int>((a, b) => -a.CompareTo(b)));
var resultA = sequence.UsingTestingSequence(ts => ts.Rank(Comparer.Create<DateTime>((a, b) => -a.CompareTo(b))));
var resultB = sequence.UsingTestingSequence(ts => ts.RankBy(x => x.Day, Comparer.Create<int>((a, b) => -a.CompareTo(b))));

Assert.IsTrue(resultA.SequenceEqual(ordinals));
Assert.IsTrue(resultB.SequenceEqual(ordinals.Reverse()));
Expand Down
15 changes: 15 additions & 0 deletions MoreLinq.Test/TestingSequence.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -27,10 +27,25 @@ static class TestingSequence
internal static TestingSequence<T> Of<T>(params T[] elements) =>
new TestingSequence<T>(elements);

[Obsolete("Use " + nameof(UsingTestingSequence) + " instead.")]
internal static TestingSequence<T> AsTestingSequence<T>(this IEnumerable<T> source) =>
source != null
? new TestingSequence<T>(source)
: throw new ArgumentNullException(nameof(source));

public static TResult UsingTestingSequence<T, TResult>(this IEnumerable<T> source,
Func<TestingSequence<T>, TResult> user)
{
if (source == null) throw new ArgumentNullException(nameof(source));
if (user == null) throw new ArgumentNullException(nameof(user));

using (var ts = source.AsTestingSequence())
return user(ts);
}

public static TResult[] UsingTestingSequence<T, TResult>(this IEnumerable<T> source,
Func<TestingSequence<T>, IEnumerable<TResult>> user) =>
source.UsingTestingSequence(ts => user(ts).ToArray());
}

/// <summary>
Expand Down