Python InputCell.value Examples

Example #1

File: react_test.py Project: jose-ramirez/exercism

    def test_callbacks_do_not_report_already_reported_values(self):
        input_ = InputCell(1)
        output = ComputeCell([input_], lambda inputs: inputs[0] + 1)

        observer = []
        callback1 = self.callback_factory(observer)

        output.add_callback(callback1)
        input_.value = 2
        self.assertEqual(observer[-1], 3)
        input_.value = 3
        self.assertEqual(observer[-1], 4)

Example #2

File: react_test.py Project: ThomasZumsteg/exercism-python

    def test_callbacks_do_not_report_already_reported_values(self):
        input_ = InputCell(1)
        output = ComputeCell([input_], lambda inputs: inputs[0] + 1)

        observer = []
        callback1 = self.callback_factory(observer)

        output.add_callback(callback1)
        input_.value = 2
        self.assertEqual(observer[-1], 3)
        input_.value = 3
        self.assertEqual(observer[-1], 4)

Example #3

    def test_callbacks_only_fire_on_change(self):
        input_ = InputCell(1)
        output = ComputeCell([input_], lambda inputs: 111 if inputs[0] < 3 else 222)

        observer = []
        callback1 = self.callback_factory(observer)

        output.add_callback(callback1)
        input_.value = 2
        self.assertEqual(observer, [])
        input_.value = 4
        self.assertEqual(observer[-1], 222)

Example #4

File: react_test.py Project: ThomasZumsteg/exercism-python

    def test_callbacks_only_fire_on_change(self):
        input_ = InputCell(1)
        output = ComputeCell(
            [input_],
            lambda inputs: 111 if inputs[0] < 3 else 222
        )

        observer = []
        callback1 = self.callback_factory(observer)

        output.add_callback(callback1)
        input_.value = 2
        self.assertEqual(observer, [])
        input_.value = 4
        self.assertEqual(observer[-1], 222)

Example #5

File: react_test.py Project: tqa236/python_exercism

    def test_compute_cells_fire_callbacks(self):
        input_ = InputCell(1)
        output = ComputeCell([input_], lambda inputs: inputs[0] + 1)

        observer = []
        callback1 = self.callback_factory(observer)
        output.add_callback(callback1)
        input_.value = 3
        self.assertEqual(observer[-1], 4)

Example #6

File: react_test.py Project: SirObi/exercism-python

    def test_callbacks_not_called_so_long_as_output_not_changed(self):
        """Guard against incorrect implementations which call callbacks
        if dependencies change but output value doesn't change."""
        input_ = InputCell(1)
        plus_one = ComputeCell([input_], lambda inputs: inputs[0] + 1)
        minus_one = ComputeCell([input_], lambda inputs: inputs[0] - 1)
        always_two = ComputeCell([plus_one, minus_one],
                                 lambda inputs: inputs[0] - inputs[1])

        observer = []
        callback1 = self.callback_factory(observer)

        always_two.add_callback(callback1)
        input_.value = 2
        input_.value = 3
        input_.value = 4
        input_.value = 5
        self.assertEqual(observer, [])

Example #7

File: react_test.py Project: SirObi/exercism-python

    def test_compute_cells_can_depend_on_other_compute_cells(self):
        input_ = InputCell(1)
        times_two = ComputeCell([input_], lambda inputs: inputs[0] * 2)
        times_thirty = ComputeCell([input_], lambda inputs: inputs[0] * 30)
        output = ComputeCell([times_two, times_thirty],
                             lambda inputs: inputs[0] + inputs[1])

        self.assertEqual(output.value, 32)
        input_.value = 3
        self.assertEqual(output.value, 96)

Example #8

File: react_test.py Project: ThomasZumsteg/exercism-python

    def test_compute_cells_fire_callbacks(self):
        input_ = InputCell(1)
        output = ComputeCell([input_], lambda inputs: inputs[0] + 1)

        observer = []
        callback1 = self.callback_factory(observer)

        output.add_callback(callback1)
        input_.value = 3
        self.assertEqual(observer[-1], 4)

Example #9

File: react_test.py Project: ThomasZumsteg/exercism-python

    def test_callbacks_not_called_so_long_as_output_not_changed(self):
        """Guard against incorrect implementations which call callbacks
        if dependencies change but output value doesn't change."""
        input_ = InputCell(1)
        plus_one = ComputeCell([input_], lambda inputs: inputs[0] + 1)
        minus_one = ComputeCell([input_], lambda inputs: inputs[0] - 1)
        always_two = ComputeCell(
            [plus_one, minus_one],
            lambda inputs: inputs[0] - inputs[1]
        )

        observer = []
        callback1 = self.callback_factory(observer)

        always_two.add_callback(callback1)
        input_.value = 2
        input_.value = 3
        input_.value = 4
        input_.value = 5
        self.assertEqual(observer, [])

Example #10

File: react_test.py Project: ThomasZumsteg/exercism-python

    def test_compute_cells_can_depend_on_other_compute_cells(self):
        input_ = InputCell(1)
        times_two = ComputeCell([input_], lambda inputs: inputs[0] * 2)
        times_thirty = ComputeCell([input_], lambda inputs: inputs[0] * 30)
        output = ComputeCell(
            [times_two, times_thirty],
            lambda inputs: inputs[0] + inputs[1]
        )

        self.assertEqual(output.value, 32)
        input_.value = 3
        self.assertEqual(output.value, 96)

Example #11

File: react_test.py Project: jose-ramirez/exercism

    def test_callbacks_can_be_added_and_removed(self):
        input_ = InputCell(11)
        output = ComputeCell([input_], lambda inputs: inputs[0] + 1)

        cb1_observer, cb2_observer, cb3_observer = [], [], []
        callback1 = self.callback_factory(cb1_observer)
        callback2 = self.callback_factory(cb2_observer)
        callback3 = self.callback_factory(cb3_observer)

        output.add_callback(callback1)
        output.add_callback(callback2)
        input_.value = 31
        self.assertEqual(cb1_observer[-1], 32)
        self.assertEqual(cb2_observer[-1], 32)

        output.remove_callback(callback1)
        output.add_callback(callback3)
        input_.value = 41
        self.assertEqual(cb2_observer[-1], 42)
        self.assertEqual(cb3_observer[-1], 42)

        # Expect callback1 not to be called.
        self.assertEqual(len(cb1_observer), 1)

Example #12

File: react_test.py Project: ThomasZumsteg/exercism-python

    def test_callbacks_can_be_added_and_removed(self):
        input_ = InputCell(11)
        output = ComputeCell([input_], lambda inputs: inputs[0] + 1)

        cb1_observer, cb2_observer, cb3_observer = [], [], []
        callback1 = self.callback_factory(cb1_observer)
        callback2 = self.callback_factory(cb2_observer)
        callback3 = self.callback_factory(cb3_observer)

        output.add_callback(callback1)
        output.add_callback(callback2)
        input_.value = 31
        self.assertEqual(cb1_observer[-1], 32)
        self.assertEqual(cb2_observer[-1], 32)

        output.remove_callback(callback1)
        output.add_callback(callback3)
        input_.value = 41
        self.assertEqual(cb2_observer[-1], 42)
        self.assertEqual(cb3_observer[-1], 42)

        # Expect callback1 not to be called.
        self.assertEqual(len(cb1_observer), 1)

Example #13

File: react_test.py Project: ThomasZumsteg/exercism-python

    def test_callbacks_can_fire_from_multiple_cells(self):
        input_ = InputCell(1)
        plus_one = ComputeCell([input_], lambda inputs: inputs[0] + 1)
        minus_one = ComputeCell([input_], lambda inputs: inputs[0] - 1)

        cb1_observer, cb2_observer = [], []
        callback1 = self.callback_factory(cb1_observer)
        callback2 = self.callback_factory(cb2_observer)

        plus_one.add_callback(callback1)
        minus_one.add_callback(callback2)
        input_.value = 10

        self.assertEqual(cb1_observer[-1], 11)
        self.assertEqual(cb2_observer[-1], 9)

Example #14

File: react_test.py Project: jose-ramirez/exercism

    def test_callbacks_can_fire_from_multiple_cells(self):
        input_ = InputCell(1)
        plus_one = ComputeCell([input_], lambda inputs: inputs[0] + 1)
        minus_one = ComputeCell([input_], lambda inputs: inputs[0] - 1)

        cb1_observer, cb2_observer = [], []
        callback1 = self.callback_factory(cb1_observer)
        callback2 = self.callback_factory(cb2_observer)

        plus_one.add_callback(callback1)
        minus_one.add_callback(callback2)
        input_.value = 10

        self.assertEqual(cb1_observer[-1], 11)
        self.assertEqual(cb2_observer[-1], 9)

Example #15

File: react_test.py Project: zhou1224271/homework

    def test_callbacks_should_only_be_called_once(self):
        """Guard against incorrect implementations which call a callback
        function multiple times when multiple dependencies change."""
        input_ = InputCell(1)
        plus_one = ComputeCell([input_], lambda inputs: inputs[0] + 1)
        minus_one1 = ComputeCell([input_], lambda inputs: inputs[0] - 1)
        minus_one2 = ComputeCell([minus_one1], lambda inputs: inputs[0] - 1)
        output = ComputeCell([plus_one, minus_one2],
                             lambda inputs: inputs[0] * inputs[1])

        observer = []
        callback1 = self.callback_factory(observer)

        output.add_callback(callback1)
        input_.value = 4
        self.assertEqual(observer[-1], 10)

Example #16

File: react_test.py Project: ThomasZumsteg/exercism-python

    def test_callbacks_should_only_be_called_once(self):
        """Guard against incorrect implementations which call a callback
        function multiple times when multiple dependencies change."""
        input_ = InputCell(1)
        plus_one = ComputeCell([input_], lambda inputs: inputs[0] + 1)
        minus_one1 = ComputeCell([input_], lambda inputs: inputs[0] - 1)
        minus_one2 = ComputeCell([minus_one1], lambda inputs: inputs[0] - 1)
        output = ComputeCell(
            [plus_one, minus_one2],
            lambda inputs: inputs[0] * inputs[1]
        )

        observer = []
        callback1 = self.callback_factory(observer)

        output.add_callback(callback1)
        input_.value = 4
        self.assertEqual(observer[-1], 10)

Example #17

File: react_test.py Project: jose-ramirez/exercism

    def test_removing_a_callback_multiple_times(self):
        """Guard against incorrect implementations which store their
        callbacks in an array."""
        input_ = InputCell(1)
        output = ComputeCell([input_], lambda inputs: inputs[0] + 1)

        cb1_observer, cb2_observer = [], []
        callback1 = self.callback_factory(cb1_observer)
        callback2 = self.callback_factory(cb2_observer)

        output.add_callback(callback1)
        output.add_callback(callback2)
        output.remove_callback(callback1)
        output.remove_callback(callback1)
        output.remove_callback(callback1)
        input_.value = 2

        self.assertEqual(cb1_observer, [])
        self.assertEqual(cb2_observer[-1], 3)

Example #18

File: react_test.py Project: ThomasZumsteg/exercism-python

    def test_removing_a_callback_multiple_times(self):
        """Guard against incorrect implementations which store their
        callbacks in an array."""
        input_ = InputCell(1)
        output = ComputeCell([input_], lambda inputs: inputs[0] + 1)

        cb1_observer, cb2_observer = [], []
        callback1 = self.callback_factory(cb1_observer)
        callback2 = self.callback_factory(cb2_observer)

        output.add_callback(callback1)
        output.add_callback(callback2)
        output.remove_callback(callback1)
        output.remove_callback(callback1)
        output.remove_callback(callback1)
        input_.value = 2

        self.assertEqual(cb1_observer, [])
        self.assertEqual(cb2_observer[-1], 3)

Example #19

File: react_test.py Project: ThomasZumsteg/exercism-python

 def test_can_set_input_cell_value(self):
     input_ = InputCell(4)
     input_.value = 20
     self.assertEqual(input_.value, 20)

Example #20

File: react_test.py Project: ThomasZumsteg/exercism-python

    def test_compute_cells_update_value_when_dependencies_are_changed(self):
        input_ = InputCell(1)
        output = ComputeCell([input_], lambda inputs: inputs[0] + 1)

        input_.value = 3
        self.assertEqual(output.value, 4)

Example #21

File: react_test.py Project: jose-ramirez/exercism

    def test_compute_cells_update_value_when_dependencies_are_changed(self):
        input_ = InputCell(1)
        output = ComputeCell([input_], lambda inputs: inputs[0] + 1)

        input_.value = 3
        self.assertEqual(output.value, 4)

Example #22

File: react_test.py Project: jose-ramirez/exercism

 def test_can_set_input_cell_value(self):
     input_ = InputCell(4)
     input_.value = 20
     self.assertEqual(input_.value, 20)