power-doctest 
A monorepo for power-doctest.
power-doctest is a project that provide doctest system for JavaScript.
Features
- Run Comments as Assertions
- Support JavaScript, Markdown Code Block, Asciidoctor Code Block
- Control doctest behavior from comments
Packages
- comment-to-assert
// => expressiontoassert
- power-doctest
- A command line tool for power-doctest
- Convert code and Run the code as doctest
- @power-doctest/core
- Convert code to doctest-ready code
- @power-doctest/tester
- A Test Runner for A power-doctest.
- @power-doctest/javascript
- A JavaScript parser for power-doctest.
- @power-doctest/markdown
- A Markdown parser for power-doctest.
- @power-doctest/asciidoctor
- A Asciidoctor parser for power-doctest.
power-doctest
power-doctest is consisted of two parts.
- Comment Assertion Syntax
- Doctest Control Annotation
Comment Assertion Syntax
You can write following comment in your JavaScript code. These comment will be canistered to assertion.
| Syntax | Transformed |
|---|---|
1; // => 2 |
assert.strictEqual(1, 2) |
console.log(1); // => 2 |
assert.strictEqual(1, 2) |
a; // => b |
assert.deepStrictEqual(a, b) |
[1, 2, 3]; // => [3, 4, 5] |
assert.deepStrictEqual([1, 2, 3], [3, 4, 5]) |
console.log({ a: 1 }): // => { b: 2 } |
assert.deepStrictEqual({ a: 1 }, { b: 2 }) |
throw new Error("message"); // => Error: "message" |
assert.throws(function() {throw new Error("message"); });" |
Promise.resolve(1); // Resolve: 2 |
Promise.resolve(Promise.resolve(1)).then(v => { assert.strictEqual(1, 2) }) |
Promise.reject(1); // Reject: 2 |
assert.rejects(Promise.reject(1)) |
For more details, see comment-to-assert.
Doctest Control Annotation
Doctest Control Annotation is defined in Language specific plugin. For more details, see following package's README.
- @power-doctest/javascript
- A JavaScript parser for power-doctest.
- @power-doctest/markdown
- A Markdown parser for power-doctest.
- @power-doctest/asciidoctor
- A Asciidoctor parser for power-doctest.
Recipes
Doctest JavaScript Code
Use @power-doctest/tester and @power-doctest/javascript in Mocha.
import { test } from "@power-doctest/tester";
import { parse } from "@power-doctest/javascript";
const globby = require("globby");
const fs = require("fs");
const path = require("path");
// doctest for source/**/*.js
describe("doctest:js", function() {
const sourceDir = path.join(__dirname, "..", "source");
const files = globby.sync([
`${sourceDir}/**/*.js`,
`!${sourceDir}/**/node_modules{,/**}`
]);
files.forEach(filePath => {
const normalizeFilePath = filePath.replace(sourceDir, "");
it(`doctest:js ${normalizeFilePath}`, function() {
const content = fs.readFileSync(filePath, "utf-8");
const parsedResults = parse({
content,
filePath
});
const parsedCode = parsedResults[0];
return test(parsedCode).catch(error => {
// Stack Trace like
console.error(`StrictEvalError: strict eval is failed
at strictEval (${filePath}:1:1)`);
return Promise.reject(error);
});
});
});
});Example
Doctest JavaScript Code in Markdown
Use @power-doctest/tester and @power-doctest/markdown in Mocha.
import { test } from "@power-doctest/tester";
import { parse } from "@power-doctest/markdown";
const globby = require("globby");
const fs = require("fs");
const path = require("path");
const transform = (code) => {
return code; // you need pre transform for the code if needed.
};
// doctest for source/**/*.md
describe("doctest:md", function() {
const sourceDir = path.join(__dirname, "..", "source");
const files = globby.sync([
`${sourceDir}/**/*.md`,
`!${sourceDir}/**/node_modules{,/**}`,
]);
files.forEach(filePath => {
const normalizeFilePath = filePath.replace(sourceDir, "");
describe(`${normalizeFilePath}`, function() {
const content = fs.readFileSync(filePath, "utf-8");
const parsedCodes = parse({
filePath,
content
});
// try to eval
const dirName = path.dirname(filePath).split(path.sep).pop();
parsedCodes.forEach((parsedCode, index) => {
const codeValue = parsedCode.code;
const testCaseName = codeValue.slice(0, 32).replace(/[\r\n]/g, "_");
it(dirName + ": " + testCaseName, function() {
return test({
...parsedCode,
code: transform(parsedCode.code)
}, {
defaultDoctestRunnerOptions: {
// Default timeout: 2sec
timeout: 1000 * 2
}
}).catch(error => {
const filePathLineColumn = `${error.fileName}:${error.lineNumber}:${error.columnNumber}`;
console.error(`Markdown Doctest is failed
at ${filePathLineColumn}
----------
${codeValue}
----------
`);
return Promise.reject(error);
});
});
});
});
});
});Example
Doctest JavaScript in Asciidoctor
Use @power-doctest/tester and @power-doctest/asciidoctor in Mocha.
const { test } = require("@power-doctest/tester");
const { parse } = require("@power-doctest/asciidoctor");
const globby = require("globby");
const fs = require("fs");
const path = require("path");
// Avoid "do not support nested sections" Error
// Replace Header with Dummy text
const replaceDummyHeader = (content) => {
return content.split("\n").map(line => {
return line.replace(/^(=+)/g, (all, match) => {
return "♪".repeat(match.length);
});
}).join("\n");
};
// doctest for source/**/*.adoc
describe("doctest:adoc", function () {
const sourceDir = path.join(__dirname, "..", "source");
const files = globby.sync([
`${sourceDir}/**/*.adoc`,
`!**/node_modules{,/**}`,
]);
files.forEach(filePath => {
const normalizeFilePath = filePath.replace(sourceDir, "");
describe(`${normalizeFilePath}`, function () {
const content = fs.readFileSync(filePath, "utf-8");
const parsedCodes = parse({
filePath,
content: replaceDummyHeader(content)
});
console.log("parsedCodes", parsedCodes);
// try to eval
const dirName = path.dirname(filePath).split(path.sep).pop();
parsedCodes.forEach((parsedCode, index) => {
const codeValue = parsedCode.code;
const testCaseName = codeValue.slice(0, 32).replace(/[\r\n]/g, "_");
it(dirName + ": " + testCaseName, function () {
return test(parsedCode).catch(error => {
const filePathLineColumn = `${error.fileName}:${error.lineNumber}:${error.columnNumber}`;
console.error(`Asciidoc Doctest is failed
at ${filePathLineColumn}
----------
${codeValue}
----------
`);
return Promise.reject(error);
});
});
});
});
});
});Example
Development
Require Yarn
Install project
yarn install
yarn boostrap
Build
yarn run build
Test
yarn test
Release: use npm
npm run versionup
# GH_TOKEN="${GITHUB_TOKEN}" yarn run versionup:patch --create-release=github
# prepare release note
npm relase