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Editing: test_searchengine.py
'''Test functions and SearchEngine class in SearchEngine.py.''' # With mock replacements, the module does not use any gui widgets. # The use of tk.Text is avoided (for now, until mock Text is improved) # by patching instances with an index function returning what is needed. # This works because mock Text.get does not use .index. import re import unittest # from test.support import requires from tkinter import BooleanVar, StringVar, TclError # ,Tk, Text import tkinter.messagebox as tkMessageBox from idlelib import SearchEngine as se from idlelib.idle_test.mock_tk import Var, Mbox from idlelib.idle_test.mock_tk import Text as mockText def setUpModule(): # Replace s-e module tkinter imports other than non-gui TclError. se.BooleanVar = Var se.StringVar = Var se.tkMessageBox = Mbox def tearDownModule(): # Restore 'just in case', though other tests should also replace. se.BooleanVar = BooleanVar se.StringVar = StringVar se.tkMessageBox = tkMessageBox class Mock: def __init__(self, *args, **kwargs): pass class GetTest(unittest.TestCase): # SearchEngine.get returns singleton created & saved on first call. def test_get(self): saved_Engine = se.SearchEngine se.SearchEngine = Mock # monkey-patch class try: root = Mock() engine = se.get(root) self.assertIsInstance(engine, se.SearchEngine) self.assertIs(root._searchengine, engine) self.assertIs(se.get(root), engine) finally: se.SearchEngine = saved_Engine # restore class to module class GetLineColTest(unittest.TestCase): # Test simple text-independent helper function def test_get_line_col(self): self.assertEqual(se.get_line_col('1.0'), (1, 0)) self.assertEqual(se.get_line_col('1.11'), (1, 11)) self.assertRaises(ValueError, se.get_line_col, ('1.0 lineend')) self.assertRaises(ValueError, se.get_line_col, ('end')) class GetSelectionTest(unittest.TestCase): # Test text-dependent helper function. ## # Need gui for text.index('sel.first/sel.last/insert'). ## @classmethod ## def setUpClass(cls): ## requires('gui') ## cls.root = Tk() ## ## @classmethod ## def tearDownClass(cls): ## cls.root.destroy() ## del cls.root def test_get_selection(self): # text = Text(master=self.root) text = mockText() text.insert('1.0', 'Hello World!') # fix text.index result when called in get_selection def sel(s): # select entire text, cursor irrelevant if s == 'sel.first': return '1.0' if s == 'sel.last': return '1.12' raise TclError text.index = sel # replaces .tag_add('sel', '1.0, '1.12') self.assertEqual(se.get_selection(text), ('1.0', '1.12')) def mark(s): # no selection, cursor after 'Hello' if s == 'insert': return '1.5' raise TclError text.index = mark # replaces .mark_set('insert', '1.5') self.assertEqual(se.get_selection(text), ('1.5', '1.5')) class ReverseSearchTest(unittest.TestCase): # Test helper function that searches backwards within a line. def test_search_reverse(self): Equal = self.assertEqual line = "Here is an 'is' test text." prog = re.compile('is') Equal(se.search_reverse(prog, line, len(line)).span(), (12, 14)) Equal(se.search_reverse(prog, line, 14).span(), (12, 14)) Equal(se.search_reverse(prog, line, 13).span(), (5, 7)) Equal(se.search_reverse(prog, line, 7).span(), (5, 7)) Equal(se.search_reverse(prog, line, 6), None) class SearchEngineTest(unittest.TestCase): # Test class methods that do not use Text widget. def setUp(self): self.engine = se.SearchEngine(root=None) # Engine.root is only used to create error message boxes. # The mock replacement ignores the root argument. def test_is_get(self): engine = self.engine Equal = self.assertEqual Equal(engine.getpat(), '') engine.setpat('hello') Equal(engine.getpat(), 'hello') Equal(engine.isre(), False) engine.revar.set(1) Equal(engine.isre(), True) Equal(engine.iscase(), False) engine.casevar.set(1) Equal(engine.iscase(), True) Equal(engine.isword(), False) engine.wordvar.set(1) Equal(engine.isword(), True) Equal(engine.iswrap(), True) engine.wrapvar.set(0) Equal(engine.iswrap(), False) Equal(engine.isback(), False) engine.backvar.set(1) Equal(engine.isback(), True) def test_setcookedpat(self): engine = self.engine engine.setcookedpat('\s') self.assertEqual(engine.getpat(), '\s') engine.revar.set(1) engine.setcookedpat('\s') self.assertEqual(engine.getpat(), r'\\s') def test_getcookedpat(self): engine = self.engine Equal = self.assertEqual Equal(engine.getcookedpat(), '') engine.setpat('hello') Equal(engine.getcookedpat(), 'hello') engine.wordvar.set(True) Equal(engine.getcookedpat(), r'\bhello\b') engine.wordvar.set(False) engine.setpat('\s') Equal(engine.getcookedpat(), r'\\s') engine.revar.set(True) Equal(engine.getcookedpat(), '\s') def test_getprog(self): engine = self.engine Equal = self.assertEqual engine.setpat('Hello') temppat = engine.getprog() Equal(temppat.pattern, re.compile('Hello', re.IGNORECASE).pattern) engine.casevar.set(1) temppat = engine.getprog() Equal(temppat.pattern, re.compile('Hello').pattern, 0) engine.setpat('') Equal(engine.getprog(), None) engine.setpat('+') engine.revar.set(1) Equal(engine.getprog(), None) self.assertEqual(Mbox.showerror.message, 'Error: nothing to repeat at position 0\nPattern: +') def test_report_error(self): showerror = Mbox.showerror Equal = self.assertEqual pat = '[a-z' msg = 'unexpected end of regular expression' Equal(self.engine.report_error(pat, msg), None) Equal(showerror.title, 'Regular expression error') expected_message = ("Error: " + msg + "\nPattern: [a-z") Equal(showerror.message, expected_message) Equal(self.engine.report_error(pat, msg, 5), None) Equal(showerror.title, 'Regular expression error') expected_message += "\nOffset: 5" Equal(showerror.message, expected_message) class SearchTest(unittest.TestCase): # Test that search_text makes right call to right method. @classmethod def setUpClass(cls): ## requires('gui') ## cls.root = Tk() ## cls.text = Text(master=cls.root) cls.text = mockText() test_text = ( 'First line\n' 'Line with target\n' 'Last line\n') cls.text.insert('1.0', test_text) cls.pat = re.compile('target') cls.engine = se.SearchEngine(None) cls.engine.search_forward = lambda *args: ('f', args) cls.engine.search_backward = lambda *args: ('b', args) ## @classmethod ## def tearDownClass(cls): ## cls.root.destroy() ## del cls.root def test_search(self): Equal = self.assertEqual engine = self.engine search = engine.search_text text = self.text pat = self.pat engine.patvar.set(None) #engine.revar.set(pat) Equal(search(text), None) def mark(s): # no selection, cursor after 'Hello' if s == 'insert': return '1.5' raise TclError text.index = mark Equal(search(text, pat), ('f', (text, pat, 1, 5, True, False))) engine.wrapvar.set(False) Equal(search(text, pat), ('f', (text, pat, 1, 5, False, False))) engine.wrapvar.set(True) engine.backvar.set(True) Equal(search(text, pat), ('b', (text, pat, 1, 5, True, False))) engine.backvar.set(False) def sel(s): if s == 'sel.first': return '2.10' if s == 'sel.last': return '2.16' raise TclError text.index = sel Equal(search(text, pat), ('f', (text, pat, 2, 16, True, False))) Equal(search(text, pat, True), ('f', (text, pat, 2, 10, True, True))) engine.backvar.set(True) Equal(search(text, pat), ('b', (text, pat, 2, 10, True, False))) Equal(search(text, pat, True), ('b', (text, pat, 2, 16, True, True))) class ForwardBackwardTest(unittest.TestCase): # Test that search_forward method finds the target. ## @classmethod ## def tearDownClass(cls): ## cls.root.destroy() ## del cls.root @classmethod def setUpClass(cls): cls.engine = se.SearchEngine(None) ## requires('gui') ## cls.root = Tk() ## cls.text = Text(master=cls.root) cls.text = mockText() # search_backward calls index('end-1c') cls.text.index = lambda index: '4.0' test_text = ( 'First line\n' 'Line with target\n' 'Last line\n') cls.text.insert('1.0', test_text) cls.pat = re.compile('target') cls.res = (2, (10, 16)) # line, slice indexes of 'target' cls.failpat = re.compile('xyz') # not in text cls.emptypat = re.compile('\w*') # empty match possible def make_search(self, func): def search(pat, line, col, wrap, ok=0): res = func(self.text, pat, line, col, wrap, ok) # res is (line, matchobject) or None return (res[0], res[1].span()) if res else res return search def test_search_forward(self): # search for non-empty match Equal = self.assertEqual forward = self.make_search(self.engine.search_forward) pat = self.pat Equal(forward(pat, 1, 0, True), self.res) Equal(forward(pat, 3, 0, True), self.res) # wrap Equal(forward(pat, 3, 0, False), None) # no wrap Equal(forward(pat, 2, 10, False), self.res) Equal(forward(self.failpat, 1, 0, True), None) Equal(forward(self.emptypat, 2, 9, True, ok=True), (2, (9, 9))) #Equal(forward(self.emptypat, 2, 9, True), self.res) # While the initial empty match is correctly ignored, skipping # the rest of the line and returning (3, (0,4)) seems buggy - tjr. Equal(forward(self.emptypat, 2, 10, True), self.res) def test_search_backward(self): # search for non-empty match Equal = self.assertEqual backward = self.make_search(self.engine.search_backward) pat = self.pat Equal(backward(pat, 3, 5, True), self.res) Equal(backward(pat, 2, 0, True), self.res) # wrap Equal(backward(pat, 2, 0, False), None) # no wrap Equal(backward(pat, 2, 16, False), self.res) Equal(backward(self.failpat, 3, 9, True), None) Equal(backward(self.emptypat, 2, 10, True, ok=True), (2, (9,9))) # Accepted because 9 < 10, not because ok=True. # It is not clear that ok=True is useful going back - tjr Equal(backward(self.emptypat, 2, 9, True), (2, (5, 9))) if __name__ == '__main__': unittest.main(verbosity=2, exit=2)
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