def test_throws_exception_with_bad_file(monkeypatch):
mock_exists = MagicMock(
return_value=False
) # Mock the "os.path.exists" functionality so that I can control when it returns True or False depending on the test case.
monkeypatch.setattr("os.path.exists", mock_exists)
with raises(Exception):
read_from_file("blah")
def test_returnsCorrectString(mock_open, monkeypatch):
# Update the test case to mock out the os.path.exist,
# and have it return true for that particular test case:
mock_exists = MagicMock(return_value = True)
monkeypatch.setattr("os.path.exists", mock_exists)
result = read_from_file("mock_file.txt")
mock_open.assert_called_once_with("mock_file.txt", "r")
assert result == "Mock Title"
def test_returns_correct_string(mock_open, monkeypatch):
mock_exists = MagicMock(return_value=True)
monkeypatch.setattr("os.path.exists", mock_exists)
result = read_from_file("blah")
mock_open.assert_called_once_with("blah", "r")
assert result == "test line"
def test_returns_correct_string(mock_open, monkeypatch):
mock_exists = MagicMock(
return_value=True
) # Mock the "os.path.exists" functionality so that I can control when it returns True or False depending on the test case.
monkeypatch.setattr("os.path.exists", mock_exists)
result = read_from_file("blah") # Call the read_from_file function.
mock_open.assert_called_once_with(
"blah", "r"
) # validate that the open function was called with the correct parameters.
assert result == "test line" # validate that the expected test string was returned.
def test_throwsExceptionWithBadFile(mock_open, monkeypatch):
mock_exists = MagicMock(return_value = False)
monkeypatch.setattr("os.path.exists", mock_exists)
with raises(Exception):
result = read_from_file("mock_file.txt")
def test_throws_exception_if_file_does_not_exist(mock_open, monkeypatch):
mock_exists = MagicMock(return_value=False)
monkeypatch.setattr("os.path.exists", mock_exists)
with pytest.raises(Exception):
result = read_from_file("blah")
def test_throws_exceptions_with_bad_file(mock_open, monkeypatch):
mock_exists = MagicMock(return_value=False)
monkeypatch.setattr('os.path.exists', mock_exists)
with raises(Exception):
result = read_from_file('blah')
def test_returns_correct_string(mock_open, monkeypatch):
mock_exists = MagicMock(return_value=True)
monkeypatch.setattr('os.path.exists', mock_exists)
result = read_from_file('blah')
mock_open.assert_called_once_with('blah', 'r')
assert result == 'test line'