Add darts exercise

config.json

@@ -706,6 +706,17 @@
           "strings"
         ]
       },
+      {
+        "slug": "darts",
+        "name": "Darts",
+        "uuid": "c5331fc2-54de-4ee8-b35c-d55b062d622e",
+        "practices": [],
+        "prerequisites": [
+          "numbers",
+          "conditionals"
+        ],
+        "difficulty": 2
+      },
       {
         "slug": "atbash-cipher",
         "name": "Atbash Cipher",

exercises/practice/darts/.docs/instructions.md

@@ -0,0 +1,31 @@
+# Instructions
+
+Calculate the points scored in a single toss of a Darts game.
+
+[Darts][darts] is a game where players throw darts at a [target][darts-target].
+
+In our particular instance of the game, the target rewards 4 different amounts of points, depending on where the dart lands:
+
+![Our dart scoreboard with values from a complete miss to a bullseye](https://assets.exercism.org/images/exercises/darts/darts-scoreboard.svg)
+
+- If the dart lands outside the target, player earns no points (0 points).
+- If the dart lands in the outer circle of the target, player earns 1 point.
+- If the dart lands in the middle circle of the target, player earns 5 points.
+- If the dart lands in the inner circle of the target, player earns 10 points.
+
+The outer circle has a radius of 10 units (this is equivalent to the total radius for the entire target), the middle circle a radius of 5 units, and the inner circle a radius of 1.
+Of course, they are all centered at the same point — that is, the circles are [concentric][] defined by the coordinates (0, 0).
+
+Given a point in the target (defined by its [Cartesian coordinates][cartesian-coordinates] `x` and `y`, where `x` and `y` are [real][real-numbers]), calculate the correct score earned by a dart landing at that point.
+
+## Credit
+
+The scoreboard image was created by [habere-et-dispertire][habere-et-dispertire] using [Inkscape][inkscape].
+
+[darts]: https://en.wikipedia.org/wiki/Darts
+[darts-target]: https://en.wikipedia.org/wiki/Darts#/media/File:Darts_in_a_dartboard.jpg
+[concentric]: https://mathworld.wolfram.com/ConcentricCircles.html
+[cartesian-coordinates]: https://www.mathsisfun.com/data/cartesian-coordinates.html
+[real-numbers]: https://www.mathsisfun.com/numbers/real-numbers.html
+[habere-et-dispertire]: https://exercism.org/profiles/habere-et-dispertire
+[inkscape]: https://en.wikipedia.org/wiki/Inkscape

exercises/practice/darts/.meta/config.json

@@ -0,0 +1,18 @@
+{
+  "authors": [
+    "erikschierboom"
+  ],
+  "files": {
+    "solution": [
+      "src/darts.clj"
+    ],
+    "test": [
+      "test/darts_test.clj"
+    ],
+    "example": [
+      ".meta/example.clj"
+    ]
+  },
+  "blurb": "Calculate the points scored in a single toss of a Darts game.",
+  "source": "Inspired by an exercise created by a professor Della Paolera in Argentina"
+}

exercises/practice/darts/.meta/example.clj

@@ -0,0 +1,10 @@
+(ns darts
+  (:require [clojure.math :refer [hypot]]))
+
+(defn score
+  [x y]
+  (condp >= (hypot x y)
+    1 10
+    5 5
+    10 1
+    0))

exercises/practice/darts/.meta/generator.tpl

@@ -0,0 +1,8 @@
+(ns darts-test
+  (:require [clojure.test :refer [deftest testing is]]
+            darts))
+{{#test_cases.score}}
+(deftest score_test_{{idx}}
+  (testing {{string description}}
+    (is (= {{expected}} (darts/score {{input.x}} {{input.y}})))))
+{{/test_cases.score~}}

exercises/practice/darts/.meta/tests.toml

@@ -0,0 +1,49 @@
+# 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.
+
+[9033f731-0a3a-4d9c-b1c0-34a1c8362afb]
+description = "Missed target"
+
+[4c9f6ff4-c489-45fd-be8a-1fcb08b4d0ba]
+description = "On the outer circle"
+
+[14378687-ee58-4c9b-a323-b089d5274be8]
+description = "On the middle circle"
+
+[849e2e63-85bd-4fed-bc3b-781ae962e2c9]
+description = "On the inner circle"
+
+[1c5ffd9f-ea66-462f-9f06-a1303de5a226]
+description = "Exactly on center"
+
+[b65abce3-a679-4550-8115-4b74bda06088]
+description = "Near the center"
+
+[66c29c1d-44f5-40cf-9927-e09a1305b399]
+description = "Just within the inner circle"
+
+[d1012f63-c97c-4394-b944-7beb3d0b141a]
+description = "Just outside the inner circle"
+
+[ab2b5666-b0b4-49c3-9b27-205e790ed945]
+description = "Just within the middle circle"
+
+[70f1424e-d690-4860-8caf-9740a52c0161]
+description = "Just outside the middle circle"
+
+[a7dbf8db-419c-4712-8a7f-67602b69b293]
+description = "Just within the outer circle"
+
+[e0f39315-9f9a-4546-96e4-a9475b885aa7]
+description = "Just outside the outer circle"
+
+[045d7d18-d863-4229-818e-b50828c75d19]
+description = "Asymmetric position between the inner and middle circles"

exercises/practice/darts/deps.edn

@@ -0,0 +1,6 @@
+{:aliases {:test {:extra-paths ["test"]
+                 :extra-deps {io.github.cognitect-labs/test-runner 
+                              {:git/url "https://github.com/cognitect-labs/test-runner.git"
+                               :sha "705ad25bbf0228b1c38d0244a36001c2987d7337"}}
+                 :main-opts ["-m" "cognitect.test-runner"]
+                 :exec-fn cognitect.test-runner.api/test}}}

exercises/practice/darts/project.clj

@@ -0,0 +1,4 @@
+(defproject darts "0.1.0-SNAPSHOT"
+  :description "darts exercise."
+  :url "https://github.com/exercism/clojure/tree/main/exercises/practice/darts"
+  :dependencies [[org.clojure/clojure "1.11.1"]])

exercises/practice/darts/src/darts.clj

@@ -0,0 +1,7 @@
+(ns darts)
+
+(defn score
+  "Calculates the score of a dart throw"
+  [x y]
+  ;; function body
+  )

exercises/practice/darts/test/darts_test.clj

@@ -0,0 +1,55 @@
+(ns darts-test
+  (:require [clojure.test :refer [deftest testing is]]
+            darts))
+
+(deftest score_test_1
+  (testing "Missed target"
+    (is (= 0 (darts/score -9 9)))))
+
+(deftest score_test_2
+  (testing "On the outer circle"
+    (is (= 1 (darts/score 0 10)))))
+
+(deftest score_test_3
+  (testing "On the middle circle"
+    (is (= 5 (darts/score -5 0)))))
+
+(deftest score_test_4
+  (testing "On the inner circle"
+    (is (= 10 (darts/score 0 -1)))))
+
+(deftest score_test_5
+  (testing "Exactly on center"
+    (is (= 10 (darts/score 0 0)))))
+
+(deftest score_test_6
+  (testing "Near the center"
+    (is (= 10 (darts/score -0.1 -0.1)))))
+
+(deftest score_test_7
+  (testing "Just within the inner circle"
+    (is (= 10 (darts/score 0.7 0.7)))))
+
+(deftest score_test_8
+  (testing "Just outside the inner circle"
+    (is (= 5 (darts/score 0.8 -0.8)))))
+
+(deftest score_test_9
+  (testing "Just within the middle circle"
+    (is (= 5 (darts/score -3.5 3.5)))))
+
+(deftest score_test_10
+  (testing "Just outside the middle circle"
+    (is (= 1 (darts/score -3.6 -3.6)))))
+
+(deftest score_test_11
+  (testing "Just within the outer circle"
+    (is (= 1 (darts/score -7.0 7.0)))))
+
+(deftest score_test_12
+  (testing "Just outside the outer circle"
+    (is (= 0 (darts/score 7.1 -7.1)))))
+
+(deftest score_test_13
+  (testing "Asymmetric position between the inner and middle circles"
+    (is (= 5 (darts/score 0.5 -4)))))