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python/exercises/practice/zipper/zipper_test.py
BethanyG be794198e1 [Resistor Color Expert]: Corrected Small Typos (#3469) 
* Corrected small typos around resistor bands.

* Due to failing CI, alterations to the test generator script were needed.
The generated vs submitted diff now skips the first three lines of the file
so that the generation date is not picked up and flagged as needing regeneration.

Sadly, a workaround was also needed to prevent Python difflib from noting the difference
anyways and producing an empty "false positive" diff.

All templates and test files also needed to be altered to ensure that the first three
lines of every test file will always be the autogeneration comment and date.

Hopefully, this will now stop the CI failures without creating any subtle additional bugs.

* Touch up to bowling template.  Added back the error raising utility.
* Touch up to two-bucket template to add back in error raising utility.
[no important files changed]
2023-07-21 16:54:40 -07:00

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# These tests are auto-generated with test data from:
# https://github.com/exercism/problem-specifications/tree/main/exercises/zipper/canonical-data.json
# File last updated on 2023-07-19
import unittest
from zipper import (
Zipper,
)
class ZipperTest(unittest.TestCase):
def test_data_is_retained(self):
initial = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
expected = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
zipper = Zipper.from_tree(initial)
result = zipper.to_tree()
self.assertEqual(result, expected)
def test_left_right_and_value(self):
initial = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
zipper = Zipper.from_tree(initial)
result = zipper.left().right().value()
self.assertEqual(result, 3)
def test_dead_end(self):
initial = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
zipper = Zipper.from_tree(initial)
result = zipper.left().left()
self.assertIsNone(result)
def test_tree_from_deep_focus(self):
initial = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
expected = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
zipper = Zipper.from_tree(initial)
result = zipper.left().right().to_tree()
self.assertEqual(result, expected)
def test_traversing_up_from_top(self):
initial = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
zipper = Zipper.from_tree(initial)
result = zipper.up()
self.assertIsNone(result)
def test_left_right_and_up(self):
initial = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
zipper = Zipper.from_tree(initial)
result = zipper.left().up().right().up().left().right().value()
self.assertEqual(result, 3)
def test_test_ability_to_descend_multiple_levels_and_return(self):
initial = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
zipper = Zipper.from_tree(initial)
result = zipper.left().right().up().up().value()
self.assertEqual(result, 1)
def test_set_value(self):
initial = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
expected = {
"value": 1,
"left": {
"value": 5,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
zipper = Zipper.from_tree(initial)
result = zipper.left().set_value(5).to_tree()
self.assertEqual(result, expected)
def test_set_value_after_traversing_up(self):
initial = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
expected = {
"value": 1,
"left": {
"value": 5,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
zipper = Zipper.from_tree(initial)
result = zipper.left().right().up().set_value(5).to_tree()
self.assertEqual(result, expected)
def test_set_left_with_leaf(self):
initial = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
expected = {
"value": 1,
"left": {
"value": 2,
"left": {"value": 5, "left": None, "right": None},
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
zipper = Zipper.from_tree(initial)
result = (
zipper.left().set_left({"value": 5, "left": None, "right": None}).to_tree()
)
self.assertEqual(result, expected)
def test_set_right_with_null(self):
initial = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
expected = {
"value": 1,
"left": {"value": 2, "left": None, "right": None},
"right": {"value": 4, "left": None, "right": None},
}
zipper = Zipper.from_tree(initial)
result = zipper.left().set_right(None).to_tree()
self.assertEqual(result, expected)
def test_set_right_with_subtree(self):
initial = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
expected = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {
"value": 6,
"left": {"value": 7, "left": None, "right": None},
"right": {"value": 8, "left": None, "right": None},
},
}
zipper = Zipper.from_tree(initial)
result = zipper.set_right(
{
"value": 6,
"left": {"value": 7, "left": None, "right": None},
"right": {"value": 8, "left": None, "right": None},
}
).to_tree()
self.assertEqual(result, expected)
def test_set_value_on_deep_focus(self):
initial = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
expected = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 5, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
zipper = Zipper.from_tree(initial)
result = zipper.left().right().set_value(5).to_tree()
self.assertEqual(result, expected)
def test_different_paths_to_same_zipper(self):
initial = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
result = Zipper.from_tree(initial).left().up().right().to_tree()
final = {
"value": 1,
"left": {
"value": 2,
"left": None,
"right": {"value": 3, "left": None, "right": None},
},
"right": {"value": 4, "left": None, "right": None},
}
expected = Zipper.from_tree(final).right().to_tree()
self.assertEqual(result, expected)
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