feat(assertions): add WasCalled to tunit mocks assertions #6126

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Merged

May 31, 2026

TUnit.Mocks.Assertions/MockAssertionExtensions.cs

-Original file line number
+Diff line change
@@ Expand Up / @@ -10,6 +10,16 @@ namespace TUnit.Mocks.Assertions; @@
     /// </summary>
     public static class MockAssertionExtensions
     {
+        /// <summary>
+        /// Asserts that the mock member was called at least once.
+        /// </summary>
+        public static WasCalledAssertion WasCalled(
+            this IAssertionSource<ICallVerification> source)
+        {
+            source.Context.ExpressionBuilder.Append($".WasCalled({nameof(Times.AtLeastOnce)})");
+            return new WasCalledAssertion(source.Context, Times.AtLeastOnce);
+        }
         /// <summary>
         /// Asserts that the mock member was called the specified number of times.
         /// </summary>
@@ Expand Down @@

TUnit.Mocks.Tests/AsyncVerificationTests.cs

-Original file line number
+Diff line change
@@ Expand Up / @@ -84,6 +84,20 @@ @@
                 .WasCalled(Times.AtLeastOnce);
         }
+        [Test]
+        public async Task WasCalled_AtLeastOnceByDefault_Passes()
+        {
+            var mock = ICalculator.Mock();
+            mock.Add(Any(), Any()).Returns(42);
+            ICalculator calc = mock.Object;
+            _ = calc.Add(1, 2);
+            _ = calc.Add(3, 4);
+            await Assert.That(mock.Add(Any(), Any()))
+                .WasCalled();
+        }
         [Test]
         public async Task Property_Getter_WasCalled_Via_Assert()
         {
@@ Expand Down @@

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