Update specification tests.

Author: bgrainger

tests/Conformance.Tests/Conformance.Tests.csproj

@@ -10,7 +10,7 @@
   </PropertyGroup>
 
  <ItemGroup>
-    <PackageReference Include="AdoNet.Specification.Tests" Version="2.0.0-alpha3" />
+    <PackageReference Include="AdoNet.Specification.Tests" Version="2.0.0-alpha4" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.3.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />

tests/Conformance.Tests/DataReaderTests.cs

@@ -1,4 +1,5 @@
 using AdoNet.Specification.Tests;
+using Xunit;
 
 namespace Conformance.Tests
 {
@@ -8,5 +9,11 @@ public DataReaderTests(SelectValueFixture fixture)
 			: base(fixture)
 		{
 		}
+
+		[Fact(Skip = "Deliberately throws InvalidCastException")]
+		public override void GetTextReader_returns_empty_for_null_String() { }
+
+		[Fact(Skip = "https://github.com/mysql-net/MySqlConnector/issues/678")]
+		public override void GetSchemaTable_throws_after_Delete() { }
 	}
 }

tests/Conformance.Tests/SelectValueFixture.cs

@@ -6,7 +6,7 @@
 
 namespace Conformance.Tests
 {
-	public class SelectValueFixture : ISelectValueFixture
+	public class SelectValueFixture : ISelectValueFixture, IDeleteFixture
 	{
 		public SelectValueFixture()
 		{
@@ -59,6 +59,8 @@ insert into select_value values
 
 		public string SelectNoRows => "SELECT * FROM mysql.user WHERE 0 = 1;";
 
+		public string DeleteNoRows => "DELETE FROM select_value WHERE 0 = 1;";
+
 		public IReadOnlyCollection<DbType> SupportedDbTypes { get; } = new[]
 		{
 			DbType.Binary,
@@ -81,6 +83,8 @@ insert into select_value values
 			DbType.UInt64,
 		};
 
+		public Type NullValueExceptionType => typeof(InvalidCastException);
+
 		private void ExecuteNonQuery(string sql)
 		{
 			using (var connection = Factory.CreateConnection())