public void SetUp() { _migrationContextMock = new Mock <IMigrationContext>(); _querySchemaMock = new Mock <IQuerySchema>(); _testSchema = "testSchema"; _testTable = "testTable"; _testColumn = "testColumn"; _migrationContextMock.Setup(x => x.QuerySchema).Returns(_querySchemaMock.Object).AtMostOnce(); _builder = new SchemaExpressionRoot(_migrationContextMock.Object); }