test_history.py

" Test history, coverage 100%."

fromidlelib.historyimportHistory
importunittest
fromtest.supportimportrequires

importtkinterastk
fromtkinterimportTextastkText
fromidlelib.idle_test.mock_tkimportTextasmkText
fromidlelib.configimportidleConf

line1='a = 7'
line2='b = a'


classStoreTest(unittest.TestCase):
'''Tests History.__init__ and History.store with mock Text'''

@classmethod
defsetUpClass(cls):
cls.text=mkText()
cls.history=History(cls.text)

deftearDown(self):
self.text.delete('1.0', 'end')
self.history.history= []

deftest_init(self):
self.assertIs(self.history.text, self.text)
self.assertEqual(self.history.history, [])
self.assertIsNone(self.history.prefix)
self.assertIsNone(self.history.pointer)
self.assertEqual(self.history.cyclic,
idleConf.GetOption("main", "History", "cyclic", 1, "bool"))

deftest_store_short(self):
self.history.store('a')
self.assertEqual(self.history.history, [])
self.history.store(' a ')
self.assertEqual(self.history.history, [])

deftest_store_dup(self):
self.history.store(line1)
self.assertEqual(self.history.history, [line1])
self.history.store(line2)
self.assertEqual(self.history.history, [line1, line2])
self.history.store(line1)
self.assertEqual(self.history.history, [line2, line1])

deftest_store_reset(self):
self.history.prefix=line1
self.history.pointer=0
self.history.store(line2)
self.assertIsNone(self.history.prefix)
self.assertIsNone(self.history.pointer)


classTextWrapper:
def__init__(self, master):
self.text=tkText(master=master)
self._bell=False
def__getattr__(self, name):
returngetattr(self.text, name)
defbell(self):
self._bell=True


classFetchTest(unittest.TestCase):
'''Test History.fetch with wrapped tk.Text.
 '''
@classmethod
defsetUpClass(cls):
requires('gui')
cls.root=tk.Tk()
cls.root.withdraw()

defsetUp(self):
self.text=text=TextWrapper(self.root)
text.insert('1.0', ">>> ")
text.mark_set('iomark', '1.4')
text.mark_gravity('iomark', 'left')
self.history=History(text)
self.history.history= [line1, line2]

@classmethod
deftearDownClass(cls):
cls.root.destroy()
delcls.root

deffetch_test(self, reverse, line, prefix, index, *, bell=False):
# Perform one fetch as invoked by Alt-N or Alt-P
# Test the result. The line test is the most important.
# The last two are diagnostic of fetch internals.
History=self.history
History.fetch(reverse)

Equal=self.assertEqual
Equal(self.text.get('iomark', 'end-1c'), line)
Equal(self.text._bell, bell)
ifbell:
self.text._bell=False
Equal(History.prefix, prefix)
Equal(History.pointer, index)
Equal(self.text.compare("insert", '==', "end-1c"), 1)

deftest_fetch_prev_cyclic(self):
prefix=''
test=self.fetch_test
test(True, line2, prefix, 1)
test(True, line1, prefix, 0)
test(True, prefix, None, None, bell=True)

deftest_fetch_next_cyclic(self):
prefix=''
test=self.fetch_test
test(False, line1, prefix, 0)
test(False, line2, prefix, 1)
test(False, prefix, None, None, bell=True)

# Prefix 'a' tests skip line2, which starts with 'b'
deftest_fetch_prev_prefix(self):
prefix='a'
self.text.insert('iomark', prefix)
self.fetch_test(True, line1, prefix, 0)
self.fetch_test(True, prefix, None, None, bell=True)

deftest_fetch_next_prefix(self):
prefix='a'
self.text.insert('iomark', prefix)
self.fetch_test(False, line1, prefix, 0)
self.fetch_test(False, prefix, None, None, bell=True)

deftest_fetch_prev_noncyclic(self):
prefix=''
self.history.cyclic=False
test=self.fetch_test
test(True, line2, prefix, 1)
test(True, line1, prefix, 0)
test(True, line1, prefix, 0, bell=True)

deftest_fetch_next_noncyclic(self):
prefix=''
self.history.cyclic=False
test=self.fetch_test
test(False, prefix, None, None, bell=True)
test(True, line2, prefix, 1)
test(False, prefix, None, None, bell=True)
test(False, prefix, None, None, bell=True)

deftest_fetch_cursor_move(self):
# Move cursor after fetch
self.history.fetch(reverse=True) # initialization
self.text.mark_set('insert', 'iomark')
self.fetch_test(True, line2, None, None, bell=True)

deftest_fetch_edit(self):
# Edit after fetch
self.history.fetch(reverse=True) # initialization
self.text.delete('iomark', 'insert', )
self.text.insert('iomark', 'a =')
self.fetch_test(True, line1, 'a =', 0) # prefix is reset

deftest_history_prev_next(self):
# Minimally test functions bound to events
self.history.history_prev('dummy event')
self.assertEqual(self.history.pointer, 1)
self.history.history_next('dummy event')
self.assertEqual(self.history.pointer, None)


if__name__=='__main__':
unittest.main(verbosity=2, exit=2)