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def test_context_repr():
"""
Context: Representation.
>>> from glitch.context import Context
>>> c = Context()
>>> c
Context({})
>>> c = Context({'foo': 1})
>>> c
Context({'foo': 1})
"""
def test_context_get_set():
"""
Context: Getting and setting values.
>>> from glitch.context import Context
>>> c = Context({'foo': 1})
>>> c['foo']
1
>>> c['foo'] = 3
>>> c['foo']
3
"""
def test_context_push_pop():
"""
Context: Pushing and popping.
>>> from glitch.context import Context
>>> c = Context()
>>> c['bar'] = 2
>>> c.push('bar') # doctest: +ELLIPSIS
<...>
>>> c['bar']
2
>>> c['bar'] = 4
>>> c['bar']
4
>>> c.pop()
>>> c['bar']
2
Pushing with value.
>>> c.push('bar', 4) # doctest: +ELLIPSIS
<...>
>>> c['bar']
4
>>> c.pop()
>>> c['bar']
2
"""
def test_context_push_absent():
"""
Context: Pushing an absent value.
>>> from glitch.context import Context
>>> c = Context()
>>> c.push('baz') # doctest: +ELLIPSIS
<...>
>>> c['baz'] = 5
>>> c['baz']
5
>>> c.pop()
>>> 'baz' in c
False
Pushing a value that doesn't get set before getting popped.
>>> c.push('quux') # doctest: +ELLIPSIS
<...>
>>> c.pop()
"""
def test_context_with():
"""
Context: Using with statement.
>>> from __future__ import with_statement
>>> from glitch.context import Context
>>> c = Context()
>>> with c.push('quux'):
... c['quux'] = 2
...
>>> 'quux' in c
False
"""
def test_context_copy():
"""
Context: Pushing mutable values.
>>> from __future__ import with_statement
>>> from glitch.context import Context
>>> c = Context()
>>> c['x'] = {'a': 1, 'b': 2}
>>> with c.push('x'):
... c['x']['c'] = 3
...
>>> sorted(c['x'].items())
[('a', 1), ('b', 2)]
"""
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