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Fix Arg.IsNull<T> and Arg.IsNotNull<T> to support nullable value types #5366

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Merged
thomhurst merged 5 commits into from
Apr 4, 2026
Merged

Fix Arg.IsNull<T> and Arg.IsNotNull<T> to support nullable value types #5366

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f638635
Fix nullability warnings on Arg.IsNull<T> and Arg.IsNotNull<T>
thomhurst Apr 4, 2026
e78d112
Support Arg.IsNull<T> and Arg.IsNotNull<T> for nullable value types
thomhurst Apr 4, 2026
7c2b8d2
Add TM005 analyzer to flag Arg.IsNull/IsNotNull with non-nullable val…
thomhurst Apr 4, 2026
6f8c5c9
Fix TM005 rule ordering and add string? regression tests
thomhurst Apr 4, 2026
c9d4a95
Move INullableValueConsumer, promote TM005 to error, add rule descrip…
thomhurst Apr 4, 2026
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4 changes: 2 additions & 2 deletions TUnit.Mocks/Arguments/Arg.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -22,10 +22,10 @@ public static class Arg
public static Arg<T> Is<T>(Func<T?, bool> predicate) => new(new PredicateMatcher<T>(predicate));

/// <summary>Matches only when the argument is null.</summary>
public static Arg<T> IsNull<T>() where T : class => new(new NullMatcher<T>());
public static Arg<T> IsNull<T>() where T : class? => new(new NullMatcher<T>());

/// <summary>Matches only when the argument is not null.</summary>
public static Arg<T> IsNotNull<T>() where T : class => new(new NotNullMatcher<T>());
public static Arg<T> IsNotNull<T>() where T : class? => new(new NotNullMatcher<T>());

/// <summary>Matches a string against a regular expression pattern.</summary>
public static Arg<string> Matches(string pattern) => new(new RegexMatcher(pattern));
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