Rewrite test assertions to use Assert methods instead of FluentAssertions and add V3 tests

Co-authored-by: baywet <7905502+baywet@users.noreply.github.com>

Author: Copilot

test/Microsoft.OpenApi.Readers.Tests/V31Tests/OpenApiExampleTests.cs

@@ -4,7 +4,6 @@
 using System.IO;
 using System.Text.Json.Nodes;
 using System.Threading.Tasks;
-using FluentAssertions;
 using Microsoft.OpenApi.Reader;
 using Xunit;
 
@@ -26,11 +25,11 @@ public async Task ParseExampleWithDataValueExtensionShouldSucceed()
                 SettingsFixture.ReaderSettings);
 
             // Assert
-            example.Should().NotBeNull();
-            example.Summary.Should().Be("Example with dataValue (extension)");
-            example.DataValue.Should().NotBeNull();
-            example.DataValue["name"].GetValue<string>().Should().Be("Jane Smith");
-            example.DataValue["age"].GetValue<decimal>().Should().Be(25);
+            Assert.NotNull(example);
+            Assert.Equal("Example with dataValue (extension)", example.Summary);
+            Assert.NotNull(example.DataValue);
+            Assert.Equal("Jane Smith", example.DataValue["name"].GetValue<string>());
+            Assert.Equal(25, example.DataValue["age"].GetValue<decimal>());
         }
 
         [Fact]
@@ -44,9 +43,9 @@ public async Task ParseExampleWithSerializedValueExtensionShouldSucceed()
                 SettingsFixture.ReaderSettings);
 
             // Assert
-            example.Should().NotBeNull();
-            example.Summary.Should().Be("Example with serializedValue (extension)");
-            example.SerializedValue.Should().Be("custom serialized string with extension");
+            Assert.NotNull(example);
+            Assert.Equal("Example with serializedValue (extension)", example.Summary);
+            Assert.Equal("custom serialized string with extension", example.SerializedValue);
         }
     }
 }

test/Microsoft.OpenApi.Readers.Tests/V32Tests/OpenApiExampleTests.cs

@@ -4,7 +4,6 @@
 using System.IO;
 using System.Text.Json.Nodes;
 using System.Threading.Tasks;
-using FluentAssertions;
 using Microsoft.OpenApi.Reader;
 using Xunit;
 
@@ -26,11 +25,11 @@ public async Task ParseExampleWithDataValueShouldSucceed()
                 SettingsFixture.ReaderSettings);
 
             // Assert
-            example.Should().NotBeNull();
-            example.Summary.Should().Be("Example with dataValue");
-            example.DataValue.Should().NotBeNull();
-            example.DataValue["name"].GetValue<string>().Should().Be("John Doe");
-            example.DataValue["age"].GetValue<decimal>().Should().Be(30);
+            Assert.NotNull(example);
+            Assert.Equal("Example with dataValue", example.Summary);
+            Assert.NotNull(example.DataValue);
+            Assert.Equal("John Doe", example.DataValue["name"].GetValue<string>());
+            Assert.Equal(30, example.DataValue["age"].GetValue<decimal>());
         }
 
         [Fact]
@@ -44,9 +43,9 @@ public async Task ParseExampleWithSerializedValueShouldSucceed()
                 SettingsFixture.ReaderSettings);
 
             // Assert
-            example.Should().NotBeNull();
-            example.Summary.Should().Be("Example with serializedValue");
-            example.SerializedValue.Should().Be("custom serialized string");
+            Assert.NotNull(example);
+            Assert.Equal("Example with serializedValue", example.Summary);
+            Assert.Equal("custom serialized string", example.SerializedValue);
         }
     }
 }

test/Microsoft.OpenApi.Readers.Tests/V3Tests/OpenApiExampleTests.cs

@@ -73,5 +73,39 @@ public async Task ParseExampleForcedStringSucceed()
             var result = await OpenApiDocument.LoadAsync(Path.Combine(SampleFolderPath, "explicitString.yaml"), SettingsFixture.ReaderSettings);
             Assert.Empty(result.Diagnostic.Errors);
         }
+
+        [Fact]
+        public async Task ParseExampleWithDataValueExtensionShouldSucceed()
+        {
+            // Arrange & Act
+            var example = await OpenApiModelFactory.LoadAsync<OpenApiExample>(
+                Path.Combine(SampleFolderPath, "exampleWithDataValue.yaml"), 
+                OpenApiSpecVersion.OpenApi3_0, 
+                new(), 
+                SettingsFixture.ReaderSettings);
+
+            // Assert
+            Assert.NotNull(example);
+            Assert.Equal("Example with dataValue (extension)", example.Summary);
+            Assert.NotNull(example.DataValue);
+            Assert.Equal("Alice Johnson", example.DataValue["name"].GetValue<string>());
+            Assert.Equal(28, example.DataValue["age"].GetValue<decimal>());
+        }
+
+        [Fact]
+        public async Task ParseExampleWithSerializedValueExtensionShouldSucceed()
+        {
+            // Arrange & Act
+            var example = await OpenApiModelFactory.LoadAsync<OpenApiExample>(
+                Path.Combine(SampleFolderPath, "exampleWithSerializedValue.yaml"), 
+                OpenApiSpecVersion.OpenApi3_0, 
+                new(), 
+                SettingsFixture.ReaderSettings);
+
+            // Assert
+            Assert.NotNull(example);
+            Assert.Equal("Example with serializedValue (extension)", example.Summary);
+            Assert.Equal("custom serialized string for V3", example.SerializedValue);
+        }
     }
 }

test/Microsoft.OpenApi.Readers.Tests/V3Tests/Samples/OpenApiExample/exampleWithDataValue.yaml

@@ -0,0 +1,4 @@
+summary: Example with dataValue (extension)
+x-oai-dataValue:
+  name: Alice Johnson
+  age: 28

test/Microsoft.OpenApi.Readers.Tests/V3Tests/Samples/OpenApiExample/exampleWithSerializedValue.yaml

@@ -0,0 +1,2 @@
+summary: Example with serializedValue (extension)
+x-oai-serializedValue: "custom serialized string for V3"