Add unit tests

Author: PerthCharern

src/Microsoft.OpenApi.Readers/ParseNodes/OpenApiAnyConverter.cs

@@ -170,9 +170,9 @@ public static IOpenApiAny GetSpecificOpenApiAny(IOpenApiAny openApiAny, OpenApiS
 
             if (type == "integer")
             {
-                if (long.TryParse(value, out var longValue))
+                if (int.TryParse(value, out var intValue))
                 {
-                    return new OpenApiLong(longValue);
+                    return new OpenApiInteger(intValue);
                 }
                 else
                 {

test/Microsoft.OpenApi.Readers.Tests/DefaultSettingsFixture.cs

@@ -19,7 +19,10 @@ public DefaultSettingsFixture()
             // given that there are multiple types that can be used for the declared type OpenApiAny.
             // Without this option, properties specific to those types would not be compared.
             AssertionOptions.AssertEquivalencyUsing(
-                o => o.AllowingInfiniteRecursion().RespectingRuntimeTypes());
+                o => o
+                    .AllowingInfiniteRecursion()
+                    .RespectingRuntimeTypes()
+                    .WithStrictOrdering());
         }
     }
 }