'''Test the functions and main class method of textView.py.'''

import unittest
import os
from test.support import requires
from tkinter import Tk, Text, TclError
from idlelib import textView as tv
from idlelib.idle_test.mock_idle import Func
from idlelib.idle_test.mock_tk import Mbox

orig_mbox = tv.tkMessageBox

class TextViewTest(unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        requires('gui')
        cls.root = Tk()
        cls.TV = TV = tv.TextViewer
        TV.transient = Func()
        TV.grab_set = Func()
        TV.wait_window = Func()

    @classmethod
    def tearDownClass(cls):
        cls.root.destroy()
        TV = cls.TV
        del cls.root, cls.TV
        del TV.transient, TV.grab_set, TV.wait_window

    def setUp(self):
        TV = self.TV
        TV.transient.__init__()
        TV.grab_set.__init__()
        TV.wait_window.__init__()


    def test_init_modal(self):
        TV = self.TV
        view = TV(self.root, 'Title', 'test text')
        self.assertTrue(TV.transient.called)
        self.assertTrue(TV.grab_set.called)
        self.assertTrue(TV.wait_window.called)
        view.Ok()

    def test_init_nonmodal(self):
        TV = self.TV
        view = TV(self.root, 'Title', 'test text', modal=False)
        self.assertFalse(TV.transient.called)
        self.assertFalse(TV.grab_set.called)
        self.assertFalse(TV.wait_window.called)
        view.Ok()

    def test_ok(self):
        view = self.TV(self.root, 'Title', 'test text', modal=False)
        view.destroy = Func()
        view.Ok()
        self.assertTrue(view.destroy.called)
        del view.destroy  # unmask real function
        view.destroy


class textviewTest(unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        requires('gui')
        cls.root = Tk()
        tv.tkMessageBox = Mbox

    @classmethod
    def tearDownClass(cls):
        cls.root.destroy()
        del cls.root
        tv.tkMessageBox = orig_mbox

    def test_view_text(self):
        # If modal True, tkinter will error with 'can't invoke "event" command'
        view = tv.view_text(self.root, 'Title', 'test text', modal=False)
        self.assertIsInstance(view, tv.TextViewer)

    def test_view_file(self):
        test_dir = os.path.dirname(__file__)
        testfile = os.path.join(test_dir, 'test_textview.py')
        view = tv.view_file(self.root, 'Title', testfile, modal=False)
        self.assertIsInstance(view, tv.TextViewer)
        self.assertIn('Test', view.textView.get('1.0', '1.end'))
        view.Ok()

        # Mock messagebox will be used and view_file will not return anything
        testfile = os.path.join(test_dir, '../notthere.py')
        view = tv.view_file(self.root, 'Title', testfile, modal=False)
        self.assertIsNone(view)

if __name__ == '__main__':
    unittest.main(verbosity=2)