Generate tests

.gitignore

@@ -6,3 +6,4 @@ build/
 **/tests
 **/*.o
 *.pyc
+__pycache__/

bin/create-exercise

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+set -e
+
+die() { echo "$*" >&2; exit 1; }
+
+if [[ $PWD != $(realpath "$(dirname "$0")/..") ]]; then
+    die "You must be in the track root directory."
+fi
+if [[ -z $1 ]]; then
+    die "usage: $0 exercise_slug"
+fi
+
+slug=$1
+
+existing=$( jq --arg slug "${slug}" '.exercises.practice[] | select(.slug == $slug)' config.json )
+if [[ -n ${existing} ]]; then
+    die "${slug} already exists in config.json"
+fi
+
+pascal=${slug^}
+while [[ ${pascal} =~ (.*)-(.*) ]]; do
+    pascal=${BASH_REMATCH[1]}${BASH_REMATCH[2]^}
+done
+
+if [[ -z $author ]]; then
+    echo
+    read -rp "What's your github username? " author
+fi
+
+read -p "What's the difficulty for ${slug}? " difficulty
+
+bin/fetch-configlet
+bin/configlet create --practice-exercise "${slug}" --author "${author}" --difficulty "${difficulty}"
+
+cp exercises/practice/hello-world/Makefile exercises/practice/${slug}/Makefile
+cp -r exercises/practice/hello-world/vendor exercises/practice/${slug}/vendor

config.json

@@ -49,16 +49,16 @@
   "concepts": [],
   "key_features": [],
   "tags": [
+    "execution_mode/compiled",
     "paradigm/imperative",
     "paradigm/procedural",
-    "typing/static",
-    "typing/weak",
-    "execution_mode/compiled",
     "platform/android",
     "platform/ios",
-    "platform/mac",
     "platform/linux",
+    "platform/mac",
     "runtime/standalone_executable",
+    "typing/static",
+    "typing/weak",
     "used_for/embedded_systems",
     "used_for/mobile"
   ]

exercises/practice/hello-world/.docs/instructions.md

@@ -1,15 +1,16 @@
 # Instructions
 
-The classical introductory exercise. Just say "Hello, World!".
+The classical introductory exercise.
+Just say "Hello, World!".
 
-["Hello, World!"](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program) is
-the traditional first program for beginning programming in a new language
-or environment.
+["Hello, World!"][hello-world] is the traditional first program for beginning programming in a new language or environment.
 
 The objectives are simple:
 
-- Write a function that returns the string "Hello, World!".
+- Modify the provided code so that it produces the string "Hello, World!".
 - Run the test suite and make sure that it succeeds.
 - Submit your solution and check it at the website.
 
 If everything goes well, you will be ready to fetch your first real exercise.
+
+[hello-world]: https://en.wikipedia.org/wiki/%22Hello,_world!%22_program

exercises/practice/hello-world/.meta/config.json

@@ -13,7 +13,7 @@
       ".meta/example.s"
     ]
   },
-  "blurb": "The classical introductory exercise. Just say \"Hello, World!\"",
+  "blurb": "Exercism's classic introductory exercise. Just say \"Hello, World!\".",
   "source": "This is an exercise to introduce users to using Exercism",
-  "source_url": "http://en.wikipedia.org/wiki/%22Hello,_world!%22_program"
+  "source_url": "https://en.wikipedia.org/wiki/%22Hello,_world!%22_program"
 }

exercises/practice/hello-world/.meta/tests.toml

@@ -0,0 +1,13 @@
+# 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.
+
+[af9ffe10-dc13-42d8-a742-e7bdafac449d]
+description = "Say Hi!"

exercises/practice/hello-world/hello_world_test.c

@@ -1,5 +1,3 @@
-// Version: 1.1.0
-
 #include "vendor/unity.h"
 
 extern const char *hello(void);

generators/exercises/hello_world.py

@@ -0,0 +1,8 @@
+FUNC_PROTO = """\
+#include "vendor/unity.h"
+
+extern const char *hello(void);
+"""
+
+def gen_func_body(prop, inp, expected):
+    return f'TEST_ASSERT_EQUAL_STRING("{expected}", {prop}());\n'

generators/generate

@@ -0,0 +1,130 @@
+#!/usr/bin/env python3
+
+import argparse
+import importlib
+import json
+import re
+import subprocess
+import sys
+import textwrap
+import tomllib
+
+
+def camel_to_snake(s):
+    s1 = re.sub("(.)([A-Z][a-z]+)", r"\1_\2", s)
+    return re.sub("([a-z0-9])([A-Z])", r"\1_\2", s1).lower()
+
+
+def desc_to_funcname(desc):
+    s = "test_" + desc.replace(" ", "_").lower()
+    return re.sub("[^a-z0-9_]", "", s)
+
+
+def read_canonical_data(exercise):
+    prefix = "Using cached 'problem-specifications' dir: "
+    args = ['bin/configlet', 'info', '-o', '-v', 'd']
+    info = subprocess.run(args, capture_output=True, check=True, text=True).stdout.split("\n")
+    cache_dir = [line[len(prefix):] for line in info if line.startswith(prefix)]
+    if len(cache_dir) != 1:
+        raise Exception("Could not determine 'problem-specifications' dir")
+    path = f"{cache_dir[0]}/exercises/{exercise}/canonical-data.json"
+    with open(path, "r") as f:
+        return json.loads(f.read())
+
+
+def flatten_cases(data):
+    cases_by_id = {}
+
+    def traverse(node):
+        nonlocal cases_by_id
+        if "cases" in node:
+            for child in node["cases"]:
+                traverse(child)
+        else:
+            add_case(cases_by_id, node)
+
+    traverse(data)
+    return [cases_by_id[uuid] for uuid in cases_by_id]
+
+
+def add_case(cases_by_id, case):
+    if "reimplements" in case:
+        cases_by_id[case["reimplements"]] = case
+    else:
+        cases_by_id[case["uuid"]] = case
+
+
+def gen_funcname(mod, case):
+    if hasattr(mod, "describe"):
+        description = mod.describe(case)
+    else:
+        description = case["description"]
+    return desc_to_funcname(description)
+
+
+def gen_main(mod, cases):
+    str_list = []
+    str_list.append("int main(void) {\n    UNITY_BEGIN();\n")
+    for case in cases:
+        funcname = gen_funcname(mod, case)
+        str_list.append(f"    RUN_TEST({funcname});\n")
+    str_list.append("    return UNITY_END();\n}\n")
+    return "".join(str_list)
+
+
+def gen_test_case(mod, case, test_ignore):
+    str_list = []
+    funcname = gen_funcname(mod, case)
+    str_list.append(f"void {funcname}(void) {{\n")
+    if test_ignore:
+        str_list.append("    TEST_IGNORE();\n")
+    prop = camel_to_snake(case["property"])
+    body = mod.gen_func_body(prop, case["input"], case["expected"])
+    body = textwrap.indent(body, "    ")
+    str_list.append(f"{body}}}\n\n")
+    return "".join(str_list)
+
+
+def gen_test_cases(mod, cases):
+    str_list = []
+    test_ignore = False
+    for case in cases:
+        str_list.append(gen_test_case(mod, case, test_ignore))
+        test_ignore = True
+    return "".join(str_list)
+
+
+def gen_test_file(mod, cases):
+    str_list = []
+    str_list.append(mod.FUNC_PROTO)
+    str_list.append("\nvoid setUp(void) {\n}\n\nvoid tearDown(void) {\n}\n\n")
+    str_list.append(gen_test_cases(mod, cases))
+    str_list.append(gen_main(mod, cases))
+    return "".join(str_list)
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("exercise")
+    parser.add_argument("-i", "--ignore-toml", action="store_true")
+    args = parser.parse_args()
+    data = read_canonical_data(args.exercise)
+    cases = flatten_cases(data)
+    if not args.ignore_toml:
+        test_toml = f"{sys.path[0]}/../exercises/practice/{args.exercise}/.meta/tests.toml"
+        with open(test_toml, "rb") as f:
+            test_toml = tomllib.load(f)
+        cases = list(filter(lambda case : test_toml.get(case['uuid'],{}).get('include', True), cases))
+    exercise = args.exercise.replace("-", "_")
+    mod = importlib.import_module("exercises." + exercise)
+    if hasattr(mod, "extra_cases"):
+        cases = cases[:]
+        cases.extend(mod.extra_cases())
+    s = gen_test_file(mod, cases)
+    path = f"{sys.path[0]}/../exercises/practice/{args.exercise}/{exercise}_test.c"
+    with open(path, "w") as f:
+        f.write(s)
+
+
+if __name__ == "__main__":
+    main()