Add practice exercise: pig-latin

config.json

@@ -330,6 +330,14 @@
         "prerequisites": [],
         "difficulty": 8
       },
+      {
+        "slug": "pig-latin",
+        "name": "Pig Latin",
+        "uuid": "2c45ef99-047e-4d83-b11d-256acc20a175",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 8
+      },
       {
         "slug": "rest-api",
         "name": "REST API",

exercises/practice/pig-latin/.docs/instructions.md

@@ -0,0 +1,46 @@
+# Instructions
+
+Your task is to translate text from English to Pig Latin.
+The translation is defined using four rules, which look at the pattern of vowels and consonants at the beginning of a word.
+These rules look at each word's use of vowels and consonants:
+
+- vowels: the letters `a`, `e`, `i`, `o`, and `u`
+- consonants: the other 21 letters of the English alphabet
+
+## Rule 1
+
+If a word begins with a vowel, or starts with `"xr"` or `"yt"`, add an `"ay"` sound to the end of the word.
+
+For example:
+
+- `"apple"` -> `"appleay"` (starts with vowel)
+- `"xray"` -> `"xrayay"` (starts with `"xr"`)
+- `"yttria"` -> `"yttriaay"` (starts with `"yt"`)
+
+## Rule 2
+
+If a word begins with one or more consonants, first move those consonants to the end of the word and then add an `"ay"` sound to the end of the word.
+
+For example:
+
+- `"pig"` -> `"igp"` -> `"igpay"` (starts with single consonant)
+- `"chair"` -> `"airch"` -> `"airchay"` (starts with multiple consonants)
+- `"thrush"` -> `"ushthr"` -> `"ushthray"` (starts with multiple consonants)
+
+## Rule 3
+
+If a word starts with zero or more consonants followed by `"qu"`, first move those consonants (if any) and the `"qu"` part to the end of the word, and then add an `"ay"` sound to the end of the word.
+
+For example:
+
+- `"quick"` -> `"ickqu"` -> `"ickquay"` (starts with `"qu"`, no preceding consonants)
+- `"square"` -> `"aresqu"` -> `"aresquay"` (starts with one consonant followed by `"qu`")
+
+## Rule 4
+
+If a word starts with one or more consonants followed by `"y"`, first move the consonants preceding the `"y"`to the end of the word, and then add an `"ay"` sound to the end of the word.
+
+Some examples:
+
+- `"my"` -> `"ym"` -> `"ymay"` (starts with single consonant followed by `"y"`)
+- `"rhythm"` -> `"ythmrh"` -> `"ythmrhay"` (starts with multiple consonants followed by `"y"`)

exercises/practice/pig-latin/.docs/introduction.md

@@ -0,0 +1,8 @@
+# Introduction
+
+Your parents have challenged you and your sibling to a game of two-on-two basketball.
+Confident they'll win, they let you score the first couple of points, but then start taking over the game.
+Needing a little boost, you start speaking in [Pig Latin][pig-latin], which is a made-up children's language that's difficult for non-children to understand.
+This will give you the edge to prevail over your parents!
+
+[pig-latin]: https://en.wikipedia.org/wiki/Pig_latin

exercises/practice/pig-latin/.meta/config.json

@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "jimmytty"
+  ],
+  "files": {
+    "solution": [
+      "pig-latin.sql"
+    ],
+    "test": [
+      "pig-latin_test.sql"
+    ],
+    "example": [
+      ".meta/example.sql"
+    ]
+  },
+  "blurb": "Implement a program that translates from English to Pig Latin.",
+  "source": "The Pig Latin exercise at Test First Teaching by Ultrasaurus",
+  "source_url": "https://github.com/ultrasaurus/test-first-teaching/blob/master/learn_ruby/pig_latin/"
+}

exercises/practice/pig-latin/.meta/example.sql

@@ -0,0 +1,51 @@
+UPDATE "pig-latin"
+   SET result = (
+     WITH words (word) AS (
+       SELECT j.value
+         FROM JSON_EACH(PRINTF('["%s"]', REPLACE(phrase, ' ', '","'))) j
+     )
+     SELECT GROUP_CONCAT(word, ' ')
+       FROM (
+         SELECT (
+           WITH remove_vowels (word, no_vowel) AS (
+             SELECT
+               word,
+               REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(
+                 word,
+                 'a', CHAR(10)),
+                 'e', CHAR(10)),
+                 'i', CHAR(10)),
+                 'o', CHAR(10)),
+                 'u', CHAR(10)
+               )
+               FROM "pig-latin"
+           )
+           SELECT CASE
+                  WHEN REGEXP('^([aeiou]|xr|yt)', word) THEN word || 'ay'
+                  WHEN REGEXP('^[bcdfghjklmnpqrstvwxyz]*qu', word)
+                    THEN PRINTF(
+                      '%s%say',
+                      SUBSTR(word, INSTR(word, 'qu') + 2),
+                      SUBSTR(word, 1, INSTR(word, 'qu') + 1)
+                    )
+                  WHEN REGEXP('^[bcdfghjklmnpqrstvwxz]+y', word)
+                    THEN
+                    PRINTF(
+                      '%s%say',
+                      SUBSTR(word, INSTR(word, 'y')),
+                      SUBSTR(word, 1 , INSTR(word, 'y') - 1)
+                    )
+                  WHEN GLOB('[bcdfghjklmnpqrstvwxyz]*', word)
+                    THEN
+                    PRINTF(
+                      '%s%say',
+                      SUBSTR(word, INSTR(no_vowel, CHAR(10))),
+                      SUBSTR(word, 1, INSTR(no_vowel, CHAR(10)) - 1)
+                    )
+                  END
+             FROM remove_vowels
+         )  AS word
+           FROM words
+       )
+   )
+;

exercises/practice/pig-latin/.meta/tests.toml

@@ -0,0 +1,79 @@
+# 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.
+
+[11567f84-e8c6-4918-aedb-435f0b73db57]
+description = "ay is added to words that start with vowels -> word beginning with a"
+
+[f623f581-bc59-4f45-9032-90c3ca9d2d90]
+description = "ay is added to words that start with vowels -> word beginning with e"
+
+[7dcb08b3-23a6-4e8a-b9aa-d4e859450d58]
+description = "ay is added to words that start with vowels -> word beginning with i"
+
+[0e5c3bff-266d-41c8-909f-364e4d16e09c]
+description = "ay is added to words that start with vowels -> word beginning with o"
+
+[614ba363-ca3c-4e96-ab09-c7320799723c]
+description = "ay is added to words that start with vowels -> word beginning with u"
+
+[bf2538c6-69eb-4fa7-a494-5a3fec911326]
+description = "ay is added to words that start with vowels -> word beginning with a vowel and followed by a qu"
+
+[e5be8a01-2d8a-45eb-abb4-3fcc9582a303]
+description = "first letter and ay are moved to the end of words that start with consonants -> word beginning with p"
+
+[d36d1e13-a7ed-464d-a282-8820cb2261ce]
+description = "first letter and ay are moved to the end of words that start with consonants -> word beginning with k"
+
+[d838b56f-0a89-4c90-b326-f16ff4e1dddc]
+description = "first letter and ay are moved to the end of words that start with consonants -> word beginning with x"
+
+[bce94a7a-a94e-4e2b-80f4-b2bb02e40f71]
+description = "first letter and ay are moved to the end of words that start with consonants -> word beginning with q without a following u"
+
+[e59dbbe8-ccee-4619-a8e9-ce017489bfc0]
+description = "first letter and ay are moved to the end of words that start with consonants -> word beginning with consonant and vowel containing qu"
+
+[c01e049a-e3e2-451c-bf8e-e2abb7e438b8]
+description = "some letter clusters are treated like a single consonant -> word beginning with ch"
+
+[9ba1669e-c43f-4b93-837a-cfc731fd1425]
+description = "some letter clusters are treated like a single consonant -> word beginning with qu"
+
+[92e82277-d5e4-43d7-8dd3-3a3b316c41f7]
+description = "some letter clusters are treated like a single consonant -> word beginning with qu and a preceding consonant"
+
+[79ae4248-3499-4d5b-af46-5cb05fa073ac]
+description = "some letter clusters are treated like a single consonant -> word beginning with th"
+
+[e0b3ae65-f508-4de3-8999-19c2f8e243e1]
+description = "some letter clusters are treated like a single consonant -> word beginning with thr"
+
+[20bc19f9-5a35-4341-9d69-1627d6ee6b43]
+description = "some letter clusters are treated like a single consonant -> word beginning with sch"
+
+[54b796cb-613d-4509-8c82-8fbf8fc0af9e]
+description = "some letter clusters are treated like a single vowel -> word beginning with yt"
+
+[8c37c5e1-872e-4630-ba6e-d20a959b67f6]
+description = "some letter clusters are treated like a single vowel -> word beginning with xr"
+
+[a4a36d33-96f3-422c-a233-d4021460ff00]
+description = "position of y in a word determines if it is a consonant or a vowel -> y is treated like a consonant at the beginning of a word"
+
+[adc90017-1a12-4100-b595-e346105042c7]
+description = "position of y in a word determines if it is a consonant or a vowel -> y is treated like a vowel at the end of a consonant cluster"
+
+[29b4ca3d-efe5-4a95-9a54-8467f2e5e59a]
+description = "position of y in a word determines if it is a consonant or a vowel -> y as second letter in two letter word"
+
+[44616581-5ce3-4a81-82d0-40c7ab13d2cf]
+description = "phrases are translated -> a whole phrase"

exercises/practice/pig-latin/create_fixture.sql

@@ -0,0 +1,10 @@
+DROP TABLE IF EXISTS "pig-latin";
+CREATE TABLE "pig-latin" (
+    phrase TEXT NOT NULL,
+    result TEXT
+);
+
+.mode csv
+.import ./data.csv "pig-latin"
+
+UPDATE "pig-latin" SET result = NULL;

exercises/practice/pig-latin/create_test_table.sql

@@ -0,0 +1,41 @@
+DROP TABLE IF EXISTS tests;
+CREATE TABLE IF NOT EXISTS tests (
+    -- uuid and description are taken from the test.toml file
+    uuid TEXT PRIMARY KEY,
+    description TEXT NOT NULL,
+    -- The following section is needed by the online test-runner
+    status TEXT DEFAULT 'fail',
+    message TEXT,
+    output TEXT,
+    test_code TEXT,
+    task_id INTEGER DEFAULT NULL,
+    -- Here are columns for the actual tests
+    phrase TEXT NOT NULL,
+    expected TEXT NOT NULL
+);
+
+INSERT INTO tests (uuid, description, phrase, expected)
+VALUES
+        ('11567f84-e8c6-4918-aedb-435f0b73db57', 'word beginning with a', 'apple', 'appleay'),
+        ('f623f581-bc59-4f45-9032-90c3ca9d2d90', 'word beginning with e', 'ear', 'earay'),
+        ('7dcb08b3-23a6-4e8a-b9aa-d4e859450d58', 'word beginning with i', 'igloo', 'iglooay'),
+        ('0e5c3bff-266d-41c8-909f-364e4d16e09c', 'word beginning with o', 'object', 'objectay'),
+        ('614ba363-ca3c-4e96-ab09-c7320799723c', 'word beginning with u', 'under', 'underay'),
+        ('bf2538c6-69eb-4fa7-a494-5a3fec911326', 'word beginning with a vowel and followed by a qu', 'equal', 'equalay'),
+        ('e5be8a01-2d8a-45eb-abb4-3fcc9582a303', 'word beginning with p', 'pig', 'igpay'),
+        ('d36d1e13-a7ed-464d-a282-8820cb2261ce', 'word beginning with k', 'koala', 'oalakay'),
+        ('d838b56f-0a89-4c90-b326-f16ff4e1dddc', 'word beginning with x', 'xenon', 'enonxay'),
+        ('bce94a7a-a94e-4e2b-80f4-b2bb02e40f71', 'word beginning with q without a following u', 'qat', 'atqay'),
+        ('e59dbbe8-ccee-4619-a8e9-ce017489bfc0', 'word beginning with consonant and vowel containing qu', 'liquid', 'iquidlay'),
+        ('c01e049a-e3e2-451c-bf8e-e2abb7e438b8', 'word beginning with ch', 'chair', 'airchay'),
+        ('9ba1669e-c43f-4b93-837a-cfc731fd1425', 'word beginning with qu', 'queen', 'eenquay'),
+        ('92e82277-d5e4-43d7-8dd3-3a3b316c41f7', 'word beginning with qu and a preceding consonant', 'square', 'aresquay'),
+        ('79ae4248-3499-4d5b-af46-5cb05fa073ac', 'word beginning with th', 'therapy', 'erapythay'),
+        ('e0b3ae65-f508-4de3-8999-19c2f8e243e1', 'word beginning with thr', 'thrush', 'ushthray'),
+        ('20bc19f9-5a35-4341-9d69-1627d6ee6b43', 'word beginning with sch', 'school', 'oolschay'),
+        ('54b796cb-613d-4509-8c82-8fbf8fc0af9e', 'word beginning with yt', 'yttria', 'yttriaay'),
+        ('8c37c5e1-872e-4630-ba6e-d20a959b67f6', 'word beginning with xr', 'xray', 'xrayay'),
+        ('a4a36d33-96f3-422c-a233-d4021460ff00', 'y is treated like a consonant at the beginning of a word', 'yellow', 'ellowyay'),
+        ('adc90017-1a12-4100-b595-e346105042c7', 'y is treated like a vowel at the end of a consonant cluster', 'rhythm', 'ythmrhay'),
+        ('29b4ca3d-efe5-4a95-9a54-8467f2e5e59a', 'y as second letter in two letter word', 'my', 'ymay'),
+        ('44616581-5ce3-4a81-82d0-40c7ab13d2cf', 'a whole phrase', 'quick fast run', 'ickquay astfay unray');

exercises/practice/pig-latin/data.csv

@@ -0,0 +1,23 @@
+"apple",
+"ear",
+"igloo",
+"object",
+"under",
+"equal",
+"pig",
+"koala",
+"xenon",
+"qat",
+"liquid",
+"chair",
+"queen",
+"square",
+"therapy",
+"thrush",
+"school",
+"yttria",
+"xray",
+"yellow",
+"rhythm",
+"my",
+"quick fast run",

exercises/practice/pig-latin/pig-latin.sql

@@ -0,0 +1,2 @@
+-- Schema: CREATE TABLE "pig-latin" ( phrase TEXT NOT NULL, result TEXT );
+-- Task: update the pig-latin table and set the result based on the phrase.

exercises/practice/pig-latin/pig-latin_test.sql

@@ -0,0 +1,40 @@
+-- Create database:
+.read ./create_fixture.sql
+
+-- Read user student solution and save any output as markdown in user_output.md:
+.mode markdown
+.output user_output.md
+.read ./pig-latin.sql
+.output
+
+-- Create a clean testing environment:
+.read ./create_test_table.sql
+
+-- Comparison of user input and the tests updates the status for each test:
+UPDATE tests
+SET status = 'pass'
+FROM (SELECT phrase, result FROM "pig-latin") AS actual
+WHERE (actual.phrase, actual.result) = (tests.phrase, tests.expected);
+
+-- Update message for failed tests to give helpful information:
+UPDATE tests
+SET message = (
+    'Result for "'
+    || tests.phrase
+    || '"'
+    || ' is <' || COALESCE(actual.result, 'NULL')
+    || '> but should be <' || tests.expected || '>'
+)
+FROM (SELECT phrase, result FROM "pig-latin") AS actual
+WHERE actual.phrase = tests.phrase AND tests.status = 'fail';
+
+-- Save results to ./output.json (needed by the online test-runner)
+.mode json
+.once './output.json'
+SELECT description, status, message, output, test_code, task_id
+FROM tests;
+
+-- Display test results in readable form for the student:
+.mode table
+SELECT description, status, message
+FROM tests;