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"""Classes that replace tkinter gui objects used by an object being tested.
A gui object is anything with a master or parent paramenter, which is typically
required in spite of what the doc strings say.
"""
class Var:
"Use for String/Int/BooleanVar: incomplete"
def __init__(self, master=None, value=None, name=None):
self.master = master
self.value = value
self.name = name
def set(self, value):
self.value = value
def get(self):
return self.value
class Mbox_func:
"""Generic mock for messagebox functions. All have same call signature.
Mbox instantiates once for each function. Tester uses attributes.
"""
def __init__(self):
self.result = None # The return for all show funcs
def __call__(self, title, message, *args, **kwds):
# Save all args for possible examination by tester
self.title = title
self.message = message
self.args = args
self.kwds = kwds
return self.result # Set by tester for ask functions
class Mbox:
"""Mock for tkinter.messagebox with an Mbox_func for each function.
This module was 'tkMessageBox' in 2.x; hence the 'import as' in 3.x.
Example usage in test_module.py for testing functios in module.py:
---
from idlelib.idle_test.mock_tk import Mbox
import module
orig_mbox = module.tkMessageBox
showerror = Mbox.showerror # example, for attribute access in test methods
class Test(unittest.TestCase):
@classmethod
def setUpClass(cls):
module.tkMessageBox = Mbox
@classmethod
def tearDownClass(cls):
module.tkMessageBox = orig_mbox
---
When tkMessageBox functions are the only gui making calls in a method,
this replacement makes the method gui-free and unit-testable.
For 'ask' functions, set func.result return before calling method.
"""
askokcancel = Mbox_func() # True or False
askquestion = Mbox_func() # 'yes' or 'no'
askretrycancel = Mbox_func() # True or False
askyesno = Mbox_func() # True or False
askyesnocancel = Mbox_func() # True, False, or None
showerror = Mbox_func() # None
showinfo = Mbox_func() # None
showwarning = Mbox_func() # None
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