Add high-scores exercise

config.json

@@ -680,6 +680,14 @@
         "practices": [],
         "prerequisites": [],
         "difficulty": 1
+      },
+      {
+        "slug": "high-scores",
+        "name": "High Scores",
+        "uuid": "f238872e-385b-42b9-9e4d-1725c23c2cd3",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 1
       }
     ]
   },

exercises/practice/high-scores/.docs/instructions.md

@@ -0,0 +1,6 @@
+# Instructions
+
+Manage a game player's High Score list.
+
+Your task is to build a high-score component of the classic Frogger game, one of the highest selling and most addictive games of all time, and a classic of the arcade era.
+Your task is to write methods that return the highest score from the list, the last added score and the three highest scores.

exercises/practice/high-scores/.meta/config.json

@@ -0,0 +1,18 @@
+{
+  "authors": [
+    "erikschierboom"
+  ],
+  "files": {
+    "solution": [
+      "high-scores.R"
+    ],
+    "test": [
+      "test_high-scores.R"
+    ],
+    "example": [
+      ".meta/example.R"
+    ]
+  },
+  "blurb": "Manage a player's High Score list.",
+  "source": "Tribute to the eighties' arcade game Frogger"
+}

exercises/practice/high-scores/.meta/tests.toml

@@ -0,0 +1,46 @@
+# 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.
+
+[1035eb93-2208-4c22-bab8-fef06769a73c]
+description = "List of scores"
+
+[6aa5dbf5-78fa-4375-b22c-ffaa989732d2]
+description = "Latest score"
+
+[b661a2e1-aebf-4f50-9139-0fb817dd12c6]
+description = "Personal best"
+
+[3d996a97-c81c-4642-9afc-80b80dc14015]
+description = "Top 3 scores -> Personal top three from a list of scores"
+
+[1084ecb5-3eb4-46fe-a816-e40331a4e83a]
+description = "Top 3 scores -> Personal top highest to lowest"
+
+[e6465b6b-5a11-4936-bfe3-35241c4f4f16]
+description = "Top 3 scores -> Personal top when there is a tie"
+
+[f73b02af-c8fd-41c9-91b9-c86eaa86bce2]
+description = "Top 3 scores -> Personal top when there are less than 3"
+
+[16608eae-f60f-4a88-800e-aabce5df2865]
+description = "Top 3 scores -> Personal top when there is only one"
+
+[2df075f9-fec9-4756-8f40-98c52a11504f]
+description = "Top 3 scores -> Latest score after personal top scores"
+
+[809c4058-7eb1-4206-b01e-79238b9b71bc]
+description = "Top 3 scores -> Scores after personal top scores"
+
+[ddb0efc0-9a86-4f82-bc30-21ae0bdc6418]
+description = "Top 3 scores -> Latest score after personal best"
+
+[6a0fd2d1-4cc4-46b9-a5bb-2fb667ca2364]
+description = "Top 3 scores -> Scores after personal best"

exercises/practice/high-scores/test_high-scores.R

@@ -0,0 +1,69 @@
+
+
+def test_list_of_scores(self):
+        scores = [30, 50, 20, 70]
+        expected = [30, 50, 20, 70]
+        self.assertEqual(HighScores(scores).scores, expected)
+
+    def test_latest_score(self):
+        scores = [100, 0, 90, 30]
+        expected = 30
+        self.assertEqual(HighScores(scores).latest(), expected)
+
+    def test_personal_best(self):
+        scores = [40, 100, 70]
+        expected = 100
+        self.assertEqual(HighScores(scores).personal_best(), expected)
+
+    def test_personal_top_three_from_a_list_of_scores(self):
+        scores = [10, 30, 90, 30, 100, 20, 10, 0, 30, 40, 40, 70, 70]
+        expected = [100, 90, 70]
+        self.assertEqual(HighScores(scores).personal_top_three(), expected)
+
+    def test_personal_top_highest_to_lowest(self):
+        scores = [20, 10, 30]
+        expected = [30, 20, 10]
+        self.assertEqual(HighScores(scores).personal_top_three(), expected)
+
+    def test_personal_top_when_there_is_a_tie(self):
+        scores = [40, 20, 40, 30]
+        expected = [40, 40, 30]
+        self.assertEqual(HighScores(scores).personal_top_three(), expected)
+
+    def test_personal_top_when_there_are_less_than_3(self):
+        scores = [30, 70]
+        expected = [70, 30]
+        self.assertEqual(HighScores(scores).personal_top_three(), expected)
+
+    def test_personal_top_when_there_is_only_one(self):
+        scores = [40]
+        expected = [40]
+        self.assertEqual(HighScores(scores).personal_top_three(), expected)
+
+    def test_latest_score_after_personal_top_scores(self):
+        scores = [70, 50, 20, 30]
+        expected = 30
+        highscores = HighScores(scores)
+        highscores.personal_top_three()
+        self.assertEqual(highscores.latest(), expected)
+
+    def test_scores_after_personal_top_scores(self):
+        scores = [30, 50, 20, 70]
+        expected = [30, 50, 20, 70]
+        highscores = HighScores(scores)
+        highscores.personal_top_three()
+        self.assertEqual(highscores.scores, expected)
+
+    def test_latest_score_after_personal_best(self):
+        scores = [20, 70, 15, 25, 30]
+        expected = 30
+        highscores = HighScores(scores)
+        highscores.personal_best()
+        self.assertEqual(highscores.latest(), expected)
+
+    def test_scores_after_personal_best(self):
+        scores = [20, 70, 15, 25, 30]
+        expected = [20, 70, 15, 25, 30]
+        highscores = HighScores(scores)
+        highscores.personal_best()
+        self.assertEqual(highscores.scores, expected)