Improve the structure of a trace log

fluentassertions · Feb 6, 2022 · d373e90 · d373e90
1 parent 223e9e4
commit d373e90
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Showing 3 changed files with 32 additions and 4 deletions.
diff --git a/Src/FluentAssertions/Equivalency/EquivalencyValidator.cs b/Src/FluentAssertions/Equivalency/EquivalencyValidator.cs
@@ -62,13 +62,14 @@ private static void UpdateScopeWithReportableContext(AssertionScope scope, Compa
 
         private void RunStepsUntilEquivalencyIsProven(Comparands comparands, IEquivalencyValidationContext context)
         {
+            using var _ = context.Tracer.WriteBlock(node => $"{node.Description}");
+
             foreach (IEquivalencyStep step in AssertionOptions.EquivalencyPlan)
             {
                 var result = step.Handle(comparands, context, this);
-                context.Tracer.WriteLine(_ => $"Step {step.GetType().Name} returned {result}");
-
                 if (result == EquivalencyResult.AssertionCompleted)
                 {
+                    context.Tracer.WriteLine(_ => $"Equivalency was proven by {step.GetType().Name}");
                     return;
                 }
             }

diff --git a/Src/FluentAssertions/Equivalency/Steps/ValueTypeEquivalencyStep.cs b/Src/FluentAssertions/Equivalency/Steps/ValueTypeEquivalencyStep.cs
@@ -18,7 +18,7 @@ public EquivalencyResult Handle(Comparands comparands, IEquivalencyValidationCon
                 context.Tracer.WriteLine(member =>
                 {
                     string strategyName = (strategy == EqualityStrategy.Equals)
-                        ? "Equals must be used" : "object overrides Equals";
+                        ? $"{expectationType} overrides Equals" : "we are forced to use Equals";
 
                     return $"Treating {member.Description} as a value type because {strategyName}.";
                 });

diff --git a/Tests/FluentAssertions.Specs/Collections/CollectionAssertionSpecs.ContainEquivalentOf.cs b/Tests/FluentAssertions.Specs/Collections/CollectionAssertionSpecs.ContainEquivalentOf.cs
@@ -195,7 +195,34 @@ public void When_collection_does_contain_equivalent_by_including_single_property
             var item = new Customer { Name = "John", Age = 20 };
 
             // Act / Assert
-            collection.Should().ContainEquivalentOf(item, options => options.Including(x => x.Name));
+            collection.Should().ContainEquivalentOf(item, options => options.Including(x => x.Name).WithTracing());
+        }
+
+        [Fact]
+        public void Tracing_should_be_included_in_the_assertion_output()
+        {
+            // Arrange
+            var collection = new[]
+            {
+                new Customer
+                {
+                    Name = "John",
+                    Age = 18
+                },
+                new Customer
+                {
+                    Name = "Jane",
+                    Age = 18
+                }
+            };
+
+            var item = new Customer { Name = "John", Age = 21 };
+
+            // Act
+            Action act = () => collection.Should().ContainEquivalentOf(item, options => options.WithTracing());
+
+            // Assert
+            act.Should().Throw<XunitException>().WithMessage("*Equivalency was proven*");
         }
 
         [Fact]