Merge pull request exercism#125 from IanWhitney/scrabble_score

Add Scrabble Score

config.json

@@ -15,6 +15,7 @@
     "rna-transcription",
     "nucleotide-count",
     "nucleotide-codons",
+    "scrabble-score",
     "roman-numerals",
     "robot-name",
     "etl",

exercises/scrabble-score/Cargo.toml

@@ -0,0 +1,3 @@
+[package]
+name = "scrabble-score"
+version = "0.0.0"

exercises/scrabble-score/example.rs

@@ -0,0 +1,40 @@
+use std::collections::HashMap;
+
+pub fn score(word: &str) -> u16 {
+    let values = dictionary();
+    word.to_lowercase()
+        .chars()
+        .map(|c| values.get(&c).clone())
+        .fold(0, |score, v| score + v.unwrap_or(&0))
+}
+
+fn dictionary() -> HashMap<char, u16> {
+    let mut values = HashMap::new();
+    values.insert('a', 1);
+    values.insert('b', 3);
+    values.insert('c', 3);
+    values.insert('d', 2);
+    values.insert('e', 1);
+    values.insert('f', 4);
+    values.insert('g', 2);
+    values.insert('h', 4);
+    values.insert('i', 1);
+    values.insert('j', 8);
+    values.insert('k', 5);
+    values.insert('l', 1);
+    values.insert('m', 3);
+    values.insert('n', 1);
+    values.insert('o', 1);
+    values.insert('p', 3);
+    values.insert('q', 10);
+    values.insert('r', 1);
+    values.insert('s', 1);
+    values.insert('t', 1);
+    values.insert('u', 1);
+    values.insert('v', 4);
+    values.insert('w', 4);
+    values.insert('x', 8);
+    values.insert('y', 4);
+    values.insert('z', 10);
+    values
+}

exercises/scrabble-score/tests/scrabble-score.rs

@@ -0,0 +1,63 @@
+extern crate scrabble_score;
+
+use scrabble_score::*;
+
+#[test]
+fn a_is_worth_one_point() {
+    assert_eq!(score("a"), 1);
+}
+
+#[test]
+#[ignore]
+fn scoring_is_case_insensitive() {
+    assert_eq!(score("A"), 1);
+}
+
+#[test]
+#[ignore]
+fn f_is_worth_four() {
+    assert_eq!(score("f"), 4);
+}
+
+#[test]
+#[ignore]
+fn two_one_point_letters_make_a_two_point_word() {
+    assert_eq!(score("at"), 2);
+}
+
+#[test]
+#[ignore]
+fn three_letter_word() {
+    assert_eq!(score("zoo"), 12);
+}
+
+#[test]
+#[ignore]
+fn medium_word() {
+    assert_eq!(score("street"), 6);
+}
+
+#[test]
+#[ignore]
+fn longer_words_with_valuable_letters() {
+    assert_eq!(score("quirky"), 22);
+}
+
+#[test]
+#[ignore]
+fn long_mixed_case_word() {
+    assert_eq!(score("OxyphenButazone"), 41);
+}
+
+#[test]
+#[ignore]
+fn non_english_scrabble_letters_do_not_score() {
+    assert_eq!(score("pinata"), 8);
+    assert_eq!(score("piñata"), 7);
+}
+
+#[test]
+#[ignore]
+fn empty_words_are_worth_zero() {
+    assert_eq!(score(""), 0);
+}