def test_impure_execute():
code="""
import os # module and function names are discarded by default.
def ff():
global y # will not be retained but will be available in the code block.
y = a + x
b.append(4)
x = a
b.append(3)
ff()
z = y
_x = x # names beginning with underscore are discarded by default
a = 99
"""
context = DataContext(subcontext=dict(a=1,b=[2]))
block = Block(code)
# by default, clean shadow after execution:
shadow = block.execute_impure(context)
assert_equal(set(context.keys()), set(['a', 'b'])) # names unchanged
assert_equal(context['b'], [2,3,4]) # mutable object was changed in context
assert_equal(set(shadow.keys()), set(['x', 'z', 'a']))
assert_equal(context['a'], 1) # original mutable object does not change,
assert_equal(shadow['a'], 99) # but the new object is in the shadow dict.
# do not clean shadow after execution:
shadow = block.execute_impure(context, clean_shadow=False)
assert_equal(set(shadow.keys()), set(['x', 'z', 'a', '_x', 'os', 'ff']))
def test_impure_execute():
raise SkipTest
code = """
import os # module and function names are discarded by default.
def ff():
global y # will not be retained but will be available in the code block.
y = a + x
b.append(4)
x = a
b.append(3)
ff()
z = y
_x = x # names beginning with underscore are discarded by default
a = 99
"""
context = DataContext(subcontext=dict(a=1, b=[2]))
block = Block(code)
# by default, clean shadow after execution:
shadow = block.execute_impure(context)
assert_equal(set(context.keys()), set(['a', 'b'])) # names unchanged
assert_equal(context['b'],
[2, 3, 4]) # mutable object was changed in context
assert_equal(set(shadow.keys()), set(['x', 'z', 'a']))
assert_equal(context['a'], 1) # original mutable object does not change,
assert_equal(shadow['a'], 99) # but the new object is in the shadow dict.
# do not clean shadow after execution:
shadow = block.execute_impure(context, clean_shadow=False)
assert_equal(set(shadow.keys()), set(['x', 'z', 'a', '_x', 'os', 'ff']))
