Add more tests for MySqlDataReader boundary conditions.

tests/IntegrationTests/QueryTests.cs

@@ -122,14 +122,21 @@ public void GetOrdinalAfterNextResult()
 	public void GetOrdinalBeforeAndAfterRead()
 	{
 		using var cmd = m_database.Connection.CreateCommand();
-		cmd.CommandText = "select 0 as zero, 1 as one;";
+		cmd.CommandText = "select 0 as zero, 1 as one; select 2 as two;";
 
 		using var reader = cmd.ExecuteReader();
 		Assert.Equal(1, reader.GetOrdinal("one"));
 		Assert.True(reader.Read());
 		Assert.Equal(1, reader.GetOrdinal("one"));
 		Assert.False(reader.Read());
 		Assert.Equal(1, reader.GetOrdinal("one"));
+
+		Assert.True(reader.NextResult());
+		Assert.Equal(0, reader.GetOrdinal("two"));
+		Assert.True(reader.Read());
+		Assert.Equal(0, reader.GetOrdinal("two"));
+		Assert.False(reader.Read());
+		Assert.Equal(0, reader.GetOrdinal("two"));
 	}
 
 	[Fact]
@@ -727,6 +734,44 @@ public void UseReaderWithoutDisposing()
 			throw ex;
 	}
 
+	[Fact]
+	public void GetNameAfterNextResult()
+	{
+		using var cmd = m_database.Connection.CreateCommand();
+		cmd.CommandText = "select 1 as a;";
+		using var reader = cmd.ExecuteReader();
+		Assert.False(reader.NextResult());
+#if MYSQL_DATA
+		Assert.Throws<IndexOutOfRangeException>(() => reader.GetName(0));
+#else
+		Assert.Throws<InvalidOperationException>(() => reader.GetName(0));
+#endif
+	}
+
+	[Fact]
+	public void GetNameBeforeAndAfterRead()
+	{
+		using var cmd = m_database.Connection.CreateCommand();
+		cmd.CommandText = "select '1' as a; select 1.0 as b;";
+		using var reader = cmd.ExecuteReader();
+		Assert.Equal("a", reader.GetName(0));
+
+		Assert.True(reader.Read());
+		Assert.Equal("a", reader.GetName(0));
+
+		Assert.False(reader.Read());
+		Assert.Equal("a", reader.GetName(0));
+
+		Assert.True(reader.NextResult());
+		Assert.Equal("b", reader.GetName(0));
+
+		Assert.True(reader.Read());
+		Assert.Equal("b", reader.GetName(0));
+
+		Assert.False(reader.Read());
+		Assert.Equal("b", reader.GetName(0));
+	}
+
 	[Theory]
 #if MYSQL_DATA
 	[InlineData("null", typeof(string))]
@@ -778,6 +823,30 @@ public void GetFieldTypeAfterNextResult()
 #endif
 	}
 
+	[Fact]
+	public void GetFieldTypeBeforeAndAfterRead()
+	{
+		using var cmd = m_database.Connection.CreateCommand();
+		cmd.CommandText = "select '1' as a; select 1.0 as b;";
+		using var reader = cmd.ExecuteReader();
+		Assert.Equal(typeof(string), reader.GetFieldType(0));
+
+		Assert.True(reader.Read());
+		Assert.Equal(typeof(string), reader.GetFieldType(0));
+
+		Assert.False(reader.Read());
+		Assert.Equal(typeof(string), reader.GetFieldType(0));
+
+		Assert.True(reader.NextResult());
+		Assert.Equal(typeof(decimal), reader.GetFieldType(0));
+
+		Assert.True(reader.Read());
+		Assert.Equal(typeof(decimal), reader.GetFieldType(0));
+
+		Assert.False(reader.Read());
+		Assert.Equal(typeof(decimal), reader.GetFieldType(0));
+	}
+
 	[Theory]
 #if MYSQL_DATA
 	[InlineData("null", "VARCHAR")]
@@ -828,6 +897,30 @@ public void GetDataTypeNameAfterNextResult()
 #endif
 	}
 
+	[Fact]
+	public void GetDataTypeNameBeforeAndAfterRead()
+	{
+		using var cmd = m_database.Connection.CreateCommand();
+		cmd.CommandText = "select '1' as a; select 1.0 as b;";
+		using var reader = cmd.ExecuteReader();
+		Assert.Equal("VARCHAR", reader.GetDataTypeName(0));
+
+		Assert.True(reader.Read());
+		Assert.Equal("VARCHAR", reader.GetDataTypeName(0));
+
+		Assert.False(reader.Read());
+		Assert.Equal("VARCHAR", reader.GetDataTypeName(0));
+
+		Assert.True(reader.NextResult());
+		Assert.Equal("DECIMAL", reader.GetDataTypeName(0));
+
+		Assert.True(reader.Read());
+		Assert.Equal("DECIMAL", reader.GetDataTypeName(0));
+
+		Assert.False(reader.Read());
+		Assert.Equal("DECIMAL", reader.GetDataTypeName(0));
+	}
+
 #if !MYSQL_DATA
 	[Fact]
 	public void GetColumnSchemaAfterNextResult()
@@ -1078,6 +1171,9 @@ public void HasRowsRepeated()
 		Assert.True(reader.HasRows);
 		Assert.True(reader.HasRows);
 		Assert.True(reader.HasRows);
+
+		Assert.False(reader.NextResult());
+		Assert.False(reader.HasRows);
 	}
 
 	[Fact]