Method test_no_default_message

test/ext/test_compiler.py:225–240

(self)

            eq_(stmt.selected_columns.keys(), ["_no_label"])

    def test_no_default_message(self):
        class MyThingy(ClauseElement):
            inherit_cache = False

        @compiles(MyThingy, "postgresql")
        def visit_thingy(thingy, compiler, **kw):
            return "mythingy"

        assert_raises_message(
            exc.UnsupportedCompilationError,
            "Compiler .*StrSQLCompiler.* can't .* "
            "<class 'test.ext.test_compiler..*MyThingy'> "
            "construct has no default compilation handler.",
            str,
            MyThingy(),
        )

    def test_default_subclass(self):
        from sqlalchemy.types import ARRAY