Skip JSON tests on MariaDB using JsonDataTypeEmulation condition

Added [SupportedServerVersionLessThanCondition(nameof(ServerVersionSupport.JsonDataTypeEmulation))] to all JSON test classes. This condition skips tests when JsonDataTypeEmulation is true, which indicates MariaDB's LONGTEXT-based JSON storage instead of MySQL's native JSON type.

MariaDB limitations:
- Stores JSON as LONGTEXT (not native JSON)
- No support for CAST(... AS json)
- Different NULL comparison semantics
- Unstable JSON_TABLE implementation

All JSON tests will now be skipped on MariaDB versions 10.2.4+ where JsonDataTypeEmulation is enabled, preventing test failures on MariaDB 10.5.2 through 12.0.2.

Co-authored-by: renemadsen <76994+renemadsen@users.noreply.github.com>

Author: Copilot

test/EFCore.MySql.FunctionalTests/BadDataJsonDeserializationMySqlTest.cs

@@ -1,10 +1,14 @@
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
+using Pomelo.EntityFrameworkCore.MySql.Infrastructure;
 using Pomelo.EntityFrameworkCore.MySql.Tests;
+using Pomelo.EntityFrameworkCore.MySql.Tests.TestUtilities.Attributes;
 
 namespace Pomelo.EntityFrameworkCore.MySql.FunctionalTests;
 
 // Re-enabled to test JSON deserialization with bad data
+// Skip on MariaDB as it uses JSON emulation (LONGTEXT) which has different behavior
+[SupportedServerVersionLessThanCondition(nameof(ServerVersionSupport.JsonDataTypeEmulation))]
 public class BadDataJsonDeserializationMySqlTest : BadDataJsonDeserializationTestBase
 {
     protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)

test/EFCore.MySql.FunctionalTests/ComplexCollectionJsonMySqlTest.cs

@@ -9,6 +9,7 @@
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Microsoft.EntityFrameworkCore.TestUtilities;
 using Pomelo.EntityFrameworkCore.MySql.FunctionalTests.TestUtilities;
+using Pomelo.EntityFrameworkCore.MySql.Infrastructure;
 using Pomelo.EntityFrameworkCore.MySql.Tests.TestUtilities.Attributes;
 using Xunit;
 
@@ -20,9 +21,10 @@ namespace Pomelo.EntityFrameworkCore.MySql.FunctionalTests;
 /// 
 /// Requirements:
 /// - MySQL 5.7.8+ (JSON type support)
-/// - MariaDB 10.2.4+ (JSON functions support)
+/// - MariaDB 10.2.4+ (JSON functions support) - Currently skipped due to JsonDataTypeEmulation limitations
 /// </summary>
 [SupportedServerVersionCondition("Json")]
+[SupportedServerVersionLessThanCondition(nameof(ServerVersionSupport.JsonDataTypeEmulation))]
 public class ComplexCollectionJsonMySqlTest : IClassFixture<ComplexCollectionJsonMySqlTest.ComplexCollectionJsonMySqlFixture>
 {
     private readonly ComplexCollectionJsonMySqlFixture _fixture;

test/EFCore.MySql.FunctionalTests/Query/Associations/ComplexJson/ComplexJsonBulkUpdateMySqlTest.cs

@@ -3,13 +3,17 @@
 using Microsoft.EntityFrameworkCore.Query.Associations.ComplexJson;
 using Microsoft.EntityFrameworkCore.TestUtilities;
 using Pomelo.EntityFrameworkCore.MySql.FunctionalTests.TestUtilities;
+using Pomelo.EntityFrameworkCore.MySql.Infrastructure;
+using Pomelo.EntityFrameworkCore.MySql.Tests.TestUtilities.Attributes;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Xunit;
 using Xunit.Abstractions;
 
 namespace Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.Associations.ComplexJson;
 
 // Re-enabled to test JSON functionality for complex types
+// Skip on MariaDB due to JsonDataTypeEmulation limitations
+[SupportedServerVersionLessThanCondition(nameof(ServerVersionSupport.JsonDataTypeEmulation))]
 public class ComplexJsonBulkUpdateMySqlTest : ComplexJsonBulkUpdateRelationalTestBase<ComplexJsonBulkUpdateMySqlTest.ComplexJsonBulkUpdateMySqlFixture>
 {
     public ComplexJsonBulkUpdateMySqlTest(ComplexJsonBulkUpdateMySqlFixture fixture, ITestOutputHelper testOutputHelper)

test/EFCore.MySql.FunctionalTests/Query/Associations/ComplexJson/ComplexJsonCollectionMySqlTest.cs

@@ -3,13 +3,17 @@
 using Microsoft.EntityFrameworkCore.Query.Associations.ComplexJson;
 using Microsoft.EntityFrameworkCore.TestUtilities;
 using Pomelo.EntityFrameworkCore.MySql.FunctionalTests.TestUtilities;
+using Pomelo.EntityFrameworkCore.MySql.Infrastructure;
+using Pomelo.EntityFrameworkCore.MySql.Tests.TestUtilities.Attributes;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Xunit;
 using Xunit.Abstractions;
 
 namespace Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.Associations.ComplexJson;
 
 // Re-enabled to test JSON functionality for complex types
+// Skip on MariaDB due to JsonDataTypeEmulation limitations
+[SupportedServerVersionLessThanCondition(nameof(ServerVersionSupport.JsonDataTypeEmulation))]
 public class ComplexJsonCollectionMySqlTest : ComplexJsonCollectionRelationalTestBase<ComplexJsonCollectionMySqlTest.ComplexJsonCollectionMySqlFixture>
 {
     public ComplexJsonCollectionMySqlTest(ComplexJsonCollectionMySqlFixture fixture, ITestOutputHelper testOutputHelper)

test/EFCore.MySql.FunctionalTests/Query/Associations/ComplexJson/ComplexJsonMiscellaneousMySqlTest.cs

@@ -2,13 +2,17 @@
 using Microsoft.EntityFrameworkCore.Query.Associations.ComplexJson;
 using Microsoft.EntityFrameworkCore.TestUtilities;
 using Pomelo.EntityFrameworkCore.MySql.FunctionalTests.TestUtilities;
+using Pomelo.EntityFrameworkCore.MySql.Infrastructure;
+using Pomelo.EntityFrameworkCore.MySql.Tests.TestUtilities.Attributes;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Xunit;
 using Xunit.Abstractions;
 
 namespace Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.Associations.ComplexJson;
 
 // Re-enabled to test JSON functionality for complex types
+// Skip on MariaDB due to JsonDataTypeEmulation limitations
+[SupportedServerVersionLessThanCondition(nameof(ServerVersionSupport.JsonDataTypeEmulation))]
 public class ComplexJsonMiscellaneousMySqlTest : ComplexJsonMiscellaneousRelationalTestBase<ComplexJsonMiscellaneousMySqlTest.ComplexJsonMiscellaneousMySqlFixture>
 {
     public ComplexJsonMiscellaneousMySqlTest(ComplexJsonMiscellaneousMySqlFixture fixture, ITestOutputHelper testOutputHelper)

test/EFCore.MySql.FunctionalTests/Query/Associations/ComplexJson/ComplexJsonPrimitiveCollectionMySqlTest.cs

@@ -3,13 +3,17 @@
 using Microsoft.EntityFrameworkCore.Query.Associations.ComplexJson;
 using Microsoft.EntityFrameworkCore.TestUtilities;
 using Pomelo.EntityFrameworkCore.MySql.FunctionalTests.TestUtilities;
+using Pomelo.EntityFrameworkCore.MySql.Infrastructure;
+using Pomelo.EntityFrameworkCore.MySql.Tests.TestUtilities.Attributes;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Xunit;
 using Xunit.Abstractions;
 
 namespace Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.Associations.ComplexJson;
 
 // Re-enabled to test JSON functionality for complex types
+// Skip on MariaDB due to JsonDataTypeEmulation limitations
+[SupportedServerVersionLessThanCondition(nameof(ServerVersionSupport.JsonDataTypeEmulation))]
 public class ComplexJsonPrimitiveCollectionMySqlTest : ComplexJsonPrimitiveCollectionRelationalTestBase<ComplexJsonPrimitiveCollectionMySqlTest.ComplexJsonPrimitiveCollectionMySqlFixture>
 {
     public ComplexJsonPrimitiveCollectionMySqlTest(ComplexJsonPrimitiveCollectionMySqlFixture fixture, ITestOutputHelper testOutputHelper)

test/EFCore.MySql.FunctionalTests/Query/Associations/ComplexJson/ComplexJsonProjectionMySqlTest.cs

@@ -3,13 +3,17 @@
 using Microsoft.EntityFrameworkCore.Query.Associations.ComplexJson;
 using Microsoft.EntityFrameworkCore.TestUtilities;
 using Pomelo.EntityFrameworkCore.MySql.FunctionalTests.TestUtilities;
+using Pomelo.EntityFrameworkCore.MySql.Infrastructure;
+using Pomelo.EntityFrameworkCore.MySql.Tests.TestUtilities.Attributes;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Xunit;
 using Xunit.Abstractions;
 
 namespace Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.Associations.ComplexJson;
 
 // Re-enabled to test JSON functionality for complex types
+// Skip on MariaDB due to JsonDataTypeEmulation limitations
+[SupportedServerVersionLessThanCondition(nameof(ServerVersionSupport.JsonDataTypeEmulation))]
 public class ComplexJsonProjectionMySqlTest : ComplexJsonProjectionRelationalTestBase<ComplexJsonProjectionMySqlTest.ComplexJsonProjectionMySqlFixture>
 {
     public ComplexJsonProjectionMySqlTest(ComplexJsonProjectionMySqlFixture fixture, ITestOutputHelper testOutputHelper)

test/EFCore.MySql.FunctionalTests/Query/Associations/ComplexJson/ComplexJsonSetOperationsMySqlTest.cs

@@ -3,13 +3,17 @@
 using Microsoft.EntityFrameworkCore.Query.Associations.ComplexJson;
 using Microsoft.EntityFrameworkCore.TestUtilities;
 using Pomelo.EntityFrameworkCore.MySql.FunctionalTests.TestUtilities;
+using Pomelo.EntityFrameworkCore.MySql.Infrastructure;
+using Pomelo.EntityFrameworkCore.MySql.Tests.TestUtilities.Attributes;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Xunit;
 using Xunit.Abstractions;
 
 namespace Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.Associations.ComplexJson;
 
 // Re-enabled to test JSON functionality for complex types
+// Skip on MariaDB due to JsonDataTypeEmulation limitations
+[SupportedServerVersionLessThanCondition(nameof(ServerVersionSupport.JsonDataTypeEmulation))]
 public class ComplexJsonSetOperationsMySqlTest : ComplexJsonSetOperationsRelationalTestBase<ComplexJsonSetOperationsMySqlTest.ComplexJsonSetOperationsMySqlFixture>
 {
     public ComplexJsonSetOperationsMySqlTest(ComplexJsonSetOperationsMySqlFixture fixture, ITestOutputHelper testOutputHelper)

test/EFCore.MySql.FunctionalTests/Query/Associations/ComplexJson/ComplexJsonStructuralEqualityMySqlTest.cs

@@ -3,6 +3,8 @@
 using Microsoft.EntityFrameworkCore.Query.Associations.ComplexJson;
 using Microsoft.EntityFrameworkCore.TestUtilities;
 using Pomelo.EntityFrameworkCore.MySql.FunctionalTests.TestUtilities;
+using Pomelo.EntityFrameworkCore.MySql.Infrastructure;
+using Pomelo.EntityFrameworkCore.MySql.Tests.TestUtilities.Attributes;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Xunit;
 using Xunit.Abstractions;
@@ -11,21 +13,16 @@ namespace Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.Associations.Co
 
 // Re-enabled to test JSON functionality for complex types
 //
-// TODO: All tests in this class should be skipped for MariaDB.
-// 
-// MariaDB stores JSON as LONGTEXT and doesn't support CAST(... AS json). When comparing JSON to NULL, 
-// we need to distinguish between database NULL vs JSON null value ("null"), which requires CAST AS json 
-// on MySQL but isn't supported on MariaDB. This causes incorrect result counts (returns 7 instead of 1) 
-// because the NULL comparison semantics differ without the CAST.
+// Skip on MariaDB: MariaDB stores JSON as LONGTEXT and doesn't support CAST(... AS json). 
+// When comparing JSON to NULL, we need to distinguish between database NULL vs JSON null value ("null"), 
+// which requires CAST AS json on MySQL but isn't supported on MariaDB. This causes incorrect result counts 
+// (returns 7 instead of 1) because the NULL comparison semantics differ without the CAST.
 //
 // Until proper JSON-null-vs-database-NULL handling is implemented for MariaDB's LONGTEXT-based JSON storage,
 // all structural equality tests in this class will fail on MariaDB with JsonDataTypeEmulation enabled.
 //
-// To skip these tests for MariaDB in CI/test runs, configure the test runner to skip tests with the
-// "SkipForMariaDb" trait, or run tests against MySQL only.
-//
 // See: https://github.com/PomeloFoundation/Pomelo.EntityFrameworkCore.MySql/issues/151
-[Trait("Category", "SkipForMariaDb")]
+[SupportedServerVersionLessThanCondition(nameof(ServerVersionSupport.JsonDataTypeEmulation))]
 public class ComplexJsonStructuralEqualityMySqlTest : ComplexJsonStructuralEqualityRelationalTestBase<ComplexJsonStructuralEqualityMySqlTest.ComplexJsonStructuralEqualityMySqlFixture>
 {
     public ComplexJsonStructuralEqualityMySqlTest(ComplexJsonStructuralEqualityMySqlFixture fixture, ITestOutputHelper testOutputHelper)