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22 changes: 19 additions & 3 deletions exercises/practice/satellite/.meta/tests.toml
Original file line number Diff line number Diff line change
@@ -1,6 +1,13 @@
# This is an auto-generated file. Regular comments will be removed when this
# file is regenerated. Regenerating will not touch any manually added keys,
# so comments can be added in a "comment" key.
# This is an auto-generated file.
#
# Regenerating this file via `configlet sync` will:
# - Recreate every `description` key/value pair
# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
# - Preserve any other key/value pair
#
# As user-added comments (using the # character) will be removed when this file
# is regenerated, comments can be added via a `comment` key.

[8df3fa26-811a-4165-9286-ff9ac0850d19]
description = "Empty tree"
Expand All @@ -19,3 +26,12 @@ description = "Reject inconsistent traversals of same length"

[d86a3d72-76a9-43b5-9d3a-e64cb1216035]
description = "Reject traversals with repeated items"

[af31ae02-7e5b-4452-a990-bccb3fca9148]
description = "A degenerate binary tree"

[ee54463d-a719-4aae-ade4-190d30ce7320]
description = "Another degenerate binary tree"

[87123c08-c155-4486-90a4-e2f75b0f3e8f]
description = "Tree with many more items"
55 changes: 54 additions & 1 deletion exercises/practice/satellite/satellite_test.py
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
# These tests are auto-generated with test data from:
# https://github.com/exercism/problem-specifications/tree/main/exercises/satellite/canonical-data.json
# File last updated on 2023-07-19
# File last updated on 2025-12-30

import unittest

Expand Down Expand Up @@ -67,3 +67,56 @@ def test_reject_traversals_with_repeated_items(self):
tree_from_traversals(preorder, inorder)
self.assertEqual(type(err.exception), ValueError)
self.assertEqual(err.exception.args[0], "traversals must contain unique items")

def test_a_degenerate_binary_tree(self):
preorder = ["a", "b", "c", "d"]
inorder = ["d", "c", "b", "a"]

expected = {
"v": "a",
"l": {
"v": "b",
"l": {"v": "c", "l": {"v": "d", "l": {}, "r": {}}, "r": {}},
"r": {},
},
"r": {},
}
self.assertEqual(tree_from_traversals(preorder, inorder), expected)

def test_another_degenerate_binary_tree(self):
preorder = ["a", "b", "c", "d"]
inorder = ["a", "b", "c", "d"]

expected = {
"v": "a",
"l": {},
"r": {
"v": "b",
"l": {},
"r": {"v": "c", "l": {}, "r": {"v": "d", "l": {}, "r": {}}},
},
}
self.assertEqual(tree_from_traversals(preorder, inorder), expected)

def test_tree_with_many_more_items(self):
preorder = ["a", "b", "d", "g", "h", "c", "e", "f", "i"]
inorder = ["g", "d", "h", "b", "a", "e", "c", "i", "f"]

expected = {
"v": "a",
"l": {
"v": "b",
"l": {
"v": "d",
"l": {"v": "g", "l": {}, "r": {}},
"r": {"v": "h", "l": {}, "r": {}},
},
"r": {},
},
"r": {
"v": "c",
"l": {"v": "e", "l": {}, "r": {}},
"r": {"v": "f", "l": {"v": "i", "l": {}, "r": {}}, "r": {}},
},
}
self.assertEqual(tree_from_traversals(preorder, inorder), expected)
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