public function testShouldGetSchemaMapper()
{
// Arrange
$connPool = m::mock(Pool::class);
$mapper = new DataMapper($connPool);
$mapper->schemaClass = 'MySchema';
$schema = m::mock(Schema::class);
Ioc::instance('MySchema', $schema);
// Act
$result = $this->callProtected($mapper, 'getSchemaMapper');
// Assert
$this->assertInstanceOf(SchemaMapper::class, $result);
$this->assertEquals($schema, $result->schema);
}