@code-to-json/test-helpers

@code-to-json/test-helpers

This package contains a variety of test helpers, useful for testing tools built on top of the TypeScript compiler API in general, and code-to-json in particular

Usage

createTempFixtureFolder

Create collection of files and folders in your OS system temp folder

You may either refer to an existing folder on disk

import { createTempFixtureFolder } from '@code-to-json/test-helpers';

// Create the test case in your system temp folder
const { rootPath, cleanup } = await createTempFixtureFolder('path/to/my/fixture/on/disk');

cleanup(); // Completely delete the test case from disk

or describe your fixture using a plain JS/TS object

import { createTempFixtureFolder } from '@code-to-json/test-helpers';

// Create the test case in your system temp folder
const { rootPath, cleanup } = await createTempFixtureFolder({
  // ./tsconfig.json
  'tsconfig.json': `
{
  "compilerOptions": {
    "noEmit": true,
    "module": "es6",
    "target": "es2015"
  },
  "include": ["src"]
}
  `,
  src: {
    // ./src/index.ts
    'index.ts': `
/**
* This is a variable with an explicit type
*/
const constWithExplicitType: string = 'foo';
`,
  },
});

cleanup(); // Completely delete the test case from disk

setupTestCase

Create the same folder structure described above for createTempFixtureFolder, and also initialize it as a TypeScript program.

import * as ts from 'typescript';
import { setupTestCase } from '@code-to-json/test-helpers';

// Create the test case in your system temp folder
const program: ts.Program = await setupTestCase(
  /**
   * Root folder of the fixture on disk
   * (you can also provide a "fixture object" as described above)
   */
  'path/to/my/fixture/on/disk',
  /**
   * One or more entry points of your application. Any imports will be included
   * in the TS program as well
   */
  ['src/index.ts'],
);

Versioning & Conventions

This library has a very strong commitment to semantic versioning, and makes use of conventional commits to automatically generate changelogs, and to increment version numbers appropriately when publishing.

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