Python SpecificationMapper.new_child_mapper Examples

Example #1

def test_can_override_in_children():
    sm = SpecificationMapper()
    child = sm.new_child_mapper()
    sm.define_specification_for('foo', const(1))
    child.define_specification_for('foo', const(2))
    assert sm.specification_for('foo') == 1
    assert child.specification_for('foo') == 2

Example #2

def test_child_can_call_other_specs_on_prototype():
    s = SpecificationMapper()
    s.define_specification_for('bar',
                               lambda t, d: t.specification_for('foo') + 1)
    s2 = s.new_child_mapper()
    s2.define_specification_for('foo', const(1))
    assert s2.specification_for('bar') == 2

Example #3

def test_cache_correctly_handles_inheritance():
    s = SpecificationMapper()
    s.define_specification_for_instances(
        list, lambda s, d: [s.specification_for(d[0])])
    t = s.new_child_mapper()
    t.define_specification_for_instances(str, lambda *_: Foo())

    x = t.specification_for('foo')
    y = t.specification_for(['foo'])[0]
    assert x is y

Example #4

def test_can_create_children():
    sm = SpecificationMapper()
    child = sm.new_child_mapper()
    sm.define_specification_for('foo', const(1))
    assert child.specification_for('foo') == 1