Enable both CJS and ESM builds

.gitignore

@@ -2,6 +2,8 @@
 /*.d.ts
 /*.js
 /*.js.map
+/build/
+/dist/
 /*.log
 /typedoc
 !.eslintrc.js

README.md

@@ -288,3 +288,6 @@ The other two commands delegate to `scenario-tester`:
     * `--scenario <name>` — pick only one specific scenario.
     * `--outdir <path>` — path to directory, where to emit a derivative project codebase of the scenario. 
 
+### ESM Support
+
+If you are writing your scenario-tests in ESM files you can use the provided `scenario-tester-esm` bin to load your files (exactly as described above). We unfortunately couldn't unify the `scenario-tester` and `scenario-tester-esm` because of a [bug in ts-node](https://github.com/TypeStrong/ts-node/issues/1997) that prevented us from adding ESM support as a minor non-breaking change. If this gets fixed upstream we could potentially unify the implementations in a future release.

cli.ts

@@ -2,7 +2,7 @@
 
 import yargs from 'yargs';
 
-yargs
+yargs(process.argv.slice(2))
   .demandCommand(1, 'Use one of the above commands')
   .command(
     'list',
@@ -22,7 +22,7 @@ yargs
         .array('require')
         .option('matrix', { type: 'string' }),
     async argv => {
-      let mod = await import('./list');
+      let mod = await import('./list.js');
       await mod.printList(argv);
     }
   )
@@ -53,7 +53,7 @@ yargs
         })
         .array('require'),
     async argv => {
-      let mod = await import('./output');
+      let mod = await import('./output.js');
       await mod.output(argv);
     }
   )

index.ts

@@ -316,15 +316,20 @@ export class Scenarios {
   }
 }
 
-export const seenScenarios: Scenario[] = [];
+declare global {
+  // eslint-disable-next-line no-var
+  var scenarioTesterSeenScenarios: Scenario[];
+}
+
+global.scenarioTesterSeenScenarios = [];
 
 export class Scenario {
   constructor(
     public name: string,
     private callbackCreateProject: CallbackCreateProject,
     private mutators: CallbackMutateProject[]
   ) {
-    seenScenarios.push(this);
+    global.scenarioTesterSeenScenarios.push(this);
   }
 
   async prepare(outdir?: string): Promise<PreparedApp> {

list.ts

@@ -1,7 +1,10 @@
-import { Scenario, seenScenarios } from '.';
-import { sync as globSync } from 'glob';
+import { Scenario } from './index.js';
+import glob from 'glob';
 import { resolve } from 'path';
 import { format } from 'util';
+import { createRequire } from 'node:module';
+
+const { sync: globSync } = glob;
 
 export interface ListParams {
   files: string[];
@@ -12,15 +15,24 @@ export interface ListParams {
 export async function list(params: ListParams): Promise<Scenario[]> {
   if (params.require) {
     for (let r of params.require) {
-      require(require.resolve(r, { paths: [process.cwd()]}));
+      if(import.meta.url) {
+        const require = createRequire(import.meta.url);
+        await import(require.resolve(r, { paths: [process.cwd()]}));
+      } else {
+        require(require.resolve(r, { paths: [process.cwd()]}));
+      }
     }
   }
   for (let pattern of params.files) {
     for (let file of globSync(pattern)) {
-      require(resolve(file));
+      if(import.meta.url) {
+        await import(resolve(file));
+      } else {
+        require(resolve(file));
+      }
     }
   }
-  return seenScenarios;
+  return global.scenarioTesterSeenScenarios;
 }
 
 export async function printList(params: ListParams) {

output.ts

@@ -1,5 +1,5 @@
-import { removeSync } from 'fs-extra';
-import { list, ListParams } from './list';
+import fs from 'fs-extra';
+import { list, ListParams } from './list.js';
 
 export interface OutputParams extends ListParams {
   scenario: string;
@@ -11,7 +11,7 @@ export async function output(params: OutputParams) {
   for (let scenario of scenarios) {
     if (scenario.name.indexOf(params.scenario) !== -1) {
       process.stdout.write(`Found scenario ${scenario.name}\n`);
-      removeSync(params.outdir);
+      fs.removeSync(params.outdir);
       await scenario.prepare(params.outdir);
       process.stdout.write(`Wrote successfully to ${params.outdir}\n`);
       return;

package.json

@@ -4,24 +4,28 @@
   "repository": "https://github.com/ef4/scenario-tester",
   "version": "2.1.2",
   "bin": {
-    "scenario-tester": "./cli.js"
+    "scenario-tester": "./dist/cli.js",
+    "scenario-tester-esm": "./dist/cli.mjs"
   },
-  "main": "index.js",
   "scripts": {
-    "prepare": "tsc",
+    "prepare": "yarn build",
+    "build": "yarn tsup cli.ts index.ts list.ts output.ts --tsconfig tsconfig.esm.json --dts --format esm,cjs",
     "start": "tsc --watch",
-    "test": "qunit test.js",
+    "test": "concurrently --no-color \"npm:test:*\" --names \"test:\"",
+    "test:ts": "node node_modules/.bin/qunit --require ts-node/register tests/test.ts",
+    "test:cjs": "qunit tests/test.cjs",
+    "test:esm": "qunit tests/test.mjs",
     "docs": "typedoc index.ts --out typedoc/",
     "docs:watch": "yarn docs -- --watch",
     "docs:serve": "browser-sync start --server \"typedoc/\" --files \"**/*.html\"",
     "docs:dev": "concurrently \"yarn docs:watch\" \"yarn docs:serve\"",
     "lint": "eslint '*.ts'"
   },
   "files": [
-    "*.js",
-    "*.d.ts",
-    "*.map",
-    "!test.*"
+    "build/*.js",
+    "build/*.d.ts",
+    "build/*.map",
+    "!build/tests/*"
   ],
   "dependencies": {
     "fixturify-project": "^6.0.0",
@@ -35,6 +39,9 @@
     "node": "18.17.0",
     "yarn": "1.22.18"
   },
+  "resolutions": {
+    "type-fest": "^3.0.0"
+  },
   "devDependencies": {
     "@types/fs-extra": "^9.0.7",
     "@types/qunit": "^2.11.3",
@@ -46,9 +53,25 @@
     "concurrently": "^8.2.0",
     "eslint": "^8.46.0",
     "eslint-plugin-tsdoc": "^0.2.17",
+    "execa": "^5.0.1",
     "lite-server": "^2.6.1",
     "qunit": "^2.18.0",
+    "ts-node": "^10.9.1",
+    "tsconfig-to-dual-package": "^1.2.0",
+    "tsup": "^7.2.0",
     "typedoc": "^0.24.8",
     "typescript": "^5.1.6"
+  },
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.mjs",
+      "require": "./dist/index.js"
+    },
+    "./*": {
+      "types": "./dist/*.d.ts",
+      "import": "./dist/*.mjs",
+      "require": "./dist/*.js"
+    }
   }
 }

test-modules.mjs

@@ -0,0 +1,89 @@
+import { Project } from 'fixturify-project';
+import { Scenarios } from './index.js';
+import Qunit from 'qunit';
+import child_process from 'child_process';
+
+function hello1(project) {
+  project.linkDependency('hello', {
+    baseDir: './fixtures',
+    resolveName: 'hello1',
+  });
+}
+
+function hello2(project) {
+  project.linkDependency('hello', {
+    baseDir: './fixtures',
+    resolveName: 'hello',
+  });
+}
+
+const scenarios = Scenarios.fromDir('./fixtures/app').expand({
+  hello1,
+  hello2,
+});
+
+scenarios.forEachScenario((scenario) => {
+  Qunit.module(scenario.name, (hooks) => {
+    hooks.before(async function ({ app }) {
+      this.app = await scenario.prepare();
+    });
+
+    Qunit.test(
+      'yarn test',
+      async function (assert) {
+        const result = await this.app.execute('yarn --silent test');
+        assert.equal(
+          result.stdout,
+          `TAP version 13
+ok 1 project > createHello
+1..1
+# pass 1
+# skip 0
+# todo 0
+# fail 0
+`
+        );
+      }
+    );
+
+    Qunit.test(
+      'yarn bin inside app',
+      async function (assert) {
+        let result = await this.app.execute('yarn --silent bin');
+        const yarnBin = result.stdout.trimRight();
+        assert.ok(yarnBin.startsWith(this.app.dir));
+        result = await this.app.execute('yarn --silent exec which qunit');
+        assert.ok(result.stdout.startsWith(yarnBin));
+      }
+    );
+
+    Qunit.test(
+      'check scenario',
+      async function (assert) {
+        let result = await this.app.execute(
+          `node -p 'require("./index").polyfilled'`
+        );
+        assert.equal(
+          result.stdout.trim(),
+          ('hello1' === scenario.name).toString()
+        );
+      }
+    );
+  });
+});
+
+Qunit.module('cli', () => {
+  Qunit.test('list', (assert) => {
+    assert.deepEqual(
+      child_process
+        .execFileSync(
+          process.execPath,
+          ['cli.js', 'list', '--files', 'test-modules.mjs', '--matrix'],
+          { encoding: 'utf8' }
+        )
+        .trimRight()
+        .split('\n'),
+      ['hello1', 'hello2']
+    );
+  });
+});

tests/test.cjs

@@ -0,0 +1,64 @@
+"use strict";
+
+const { Scenarios } = require('scenario-tester');
+const qunit = require("qunit");
+const child_process = require("child_process");
+const execa = require('execa');
+
+function hello1(project) {
+    project.linkDependency('hello', {
+        baseDir: './tests/fixtures',
+        resolveName: 'hello1',
+    });
+}
+function hello2(project) {
+    project.linkDependency('hello', {
+        baseDir: './tests/fixtures',
+        resolveName: 'hello',
+    });
+}
+const scenarios = Scenarios.fromDir('./tests/fixtures/app').expand({
+    hello1,
+    hello2,
+});
+scenarios.forEachScenario((scenario) => {
+    qunit.module(scenario.name, (hooks) => {
+        hooks.before(async function () {
+            this.app = await scenario.prepare();
+        });
+        qunit.test('yarn test', async function (assert) {
+            const result = await this.app.execute('yarn --silent test');
+            assert.equal(result.stdout, `TAP version 13
+ok 1 project > createHello
+1..1
+# pass 1
+# skip 0
+# todo 0
+# fail 0
+`);
+        });
+        qunit.test('yarn bin inside app', async function (assert) {
+            let result = await this.app.execute('yarn --silent bin');
+            const yarnBin = result.stdout.trimRight();
+            assert.ok(yarnBin.startsWith(this.app.dir));
+            result = await this.app.execute('yarn --silent exec which qunit');
+            assert.ok(result.stdout.startsWith(yarnBin));
+        });
+        qunit.test('check scenario', async function (assert) {
+            let result = await this.app.execute(`node -p 'require("./index").polyfilled'`);
+            assert.equal(result.stdout.trim(), ('hello1' === scenario.name).toString());
+        });
+    });
+});
+qunit.module('cli', () => {
+    qunit.test('list', async (assert) => {
+      const result = await execa('node', ['./dist/cli.js', 'list', '--files', 'tests/test.cjs', '--matrix'])
+
+      const { stdout } = result;
+      assert.deepEqual(
+          stdout.split('\n'),
+        ['hello1', 'hello2']
+      );
+    });
+});
+//# sourceMappingURL=test.js.map