🚧 progress: Add scripts to test build artifacts.

Missing a GitHub workflow: how do we cache builds across workflows?
Probably needs `@node-loader/babel` with `{"node": "current"}` to be
generic. Would be nice to avoid loading `regenerator-runtime` when not
necessary.

Author: make-github-pseudonymous-again

package.json

@@ -46,7 +46,7 @@
     "ci:test": "npm run lint-config && npm run lint && npm run cover",
     "commit-msg": "commitlint --edit",
     "cover": "NODE_ENV=cover c8 --all --src src --reporter lcov --reporter text-summary --reporter text npm test",
-    "debug": "NODE_ENV=debug npm run test -- -st --fail-fast",
+    "debug": "NODE_ENV=debug npm test -- -- -- -st --fail-fast",
     "dev": "npm run lint-config-and-fix && npm run lint-and-fix && npm run cover -- -- -st --fail-fast",
     "install-hooks": "husky install",
     "lint": "xo",
@@ -59,7 +59,13 @@
     "prepare": "npm run build",
     "prepublishOnly": "pinst --disable",
     "release": "np --message ':hatching_chick: release: Bumping to v%s.'",
-    "test": "ava"
+    "test": "npm run test:src",
+    "test-cmd": "ava",
+    "test:cjs": "IMPORT_MAP_PATH=test/import-maps/dist/index.json npm run test-cmd",
+    "test:dist": "npm run test:modern && npm run test:module && npm run test:cjs",
+    "test:modern": "IMPORT_MAP_PATH=test/import-maps/dist/index.modern.json npm run test-cmd",
+    "test:module": "IMPORT_MAP_PATH=test/import-maps/dist/index.module.json npm run test-cmd",
+    "test:src": "IMPORT_MAP_PATH=test/import-maps/src/index.json npm run test-cmd"
   },
   "dependencies": {},
   "devDependencies": {
@@ -68,7 +74,8 @@
     "@babel/register": "7.16.0",
     "@commitlint/cli": "15.0.0",
     "@js-library/commitlint-config": "0.0.4",
-    "ava": "3.15.0",
+    "@node-loader/import-maps": "^1.0.3",
+    "ava": "^4.0.0-rc.1",
     "babel-plugin-transform-remove-console": "6.9.4",
     "babel-plugin-unassert": "3.2.0",
     "babel-preset-power-assert": "3.0.0",
@@ -93,8 +100,10 @@
       "test/src/**/*"
     ],
     "require": [
-      "regenerator-runtime/runtime",
-      "@babel/register"
+      "regenerator-runtime/runtime"
+    ],
+    "nodeArguments": [
+      "--experimental-loader=@node-loader/import-maps"
     ],
     "timeout": "1m"
   },

test/import-maps/dist/index.json

@@ -0,0 +1,5 @@
+{
+  "imports": {
+    "#module": "./dist/index.cjs"
+  }
+}

test/import-maps/dist/index.modern.json

@@ -0,0 +1,5 @@
+{
+  "imports": {
+    "#module": "./dist/index.modern.js"
+  }
+}

test/import-maps/dist/index.module.json

@@ -0,0 +1,5 @@
+{
+  "imports": {
+    "#module": "./dist/index.module.js"
+  }
+}

test/import-maps/src/index.json

@@ -0,0 +1,5 @@
+{
+  "imports": {
+    "#module": "./src/index.js"
+  }
+}

test/src/asyncIterator.js

@@ -1,6 +1,6 @@
 import test from 'ava';
 
-import {fromString} from '../../src/index.js';
+import {fromString} from '#module';
 
 /**
  * @test {Tape#[Symbol.asyncIterator]}

test/src/fromReadStream.js

@@ -1,7 +1,7 @@
 import fs from 'fs';
 import test from 'ava';
 
-import {fromReadStream, toString} from '../../src/index.js';
+import {fromReadStream, toString} from '#module';
 
 test('unread token', async (t) => {
 	const filepath = 'test/data/hello-world.txt';

test/src/ignore.js

@@ -1,6 +1,6 @@
 import test from 'ava';
 
-import {fromString, ignore, toString} from '../../src/index.js';
+import {fromString, ignore, toString} from '#module';
 
 /**
  * @test {ignore}

test/src/iterator.js

@@ -1,6 +1,6 @@
 import test from 'ava';
 
-import {fromString} from '../../src/index.js';
+import {fromString} from '#module';
 
 /**
  * Checks that trying to access the synchronous iterator of a tape throws.

test/src/map.js

@@ -1,6 +1,6 @@
 import test from 'ava';
 
-import {fromString, toString, map} from '../../src/index.js';
+import {fromString, toString, map} from '#module';
 
 /**
  * @test {map}

test/src/promise.js

@@ -1,6 +1,6 @@
 import test from 'ava';
 
-import {fromString} from '../../src/index.js';
+import {fromString} from '#module';
 
 /**
  * @test {fromString}

test/src/skip.js

@@ -1,6 +1,6 @@
 import test from 'ava';
 
-import {fromString, skip} from '../../src/index.js';
+import {fromString, skip} from '#module';
 
 /**
  * @test {fromString}

test/src/split.js

@@ -1,6 +1,6 @@
 import test from 'ava';
 
-import {fromString, split, toString} from '../../src/index.js';
+import {fromString, split, toString} from '#module';
 
 /**
  * @test {split}

test/src/string.js

@@ -1,6 +1,6 @@
 import test from 'ava';
 
-import {fromString, toString} from '../../src/index.js';
+import {fromString, toString} from '#module';
 
 /**
  * @test {fromString}

test/src/toAsyncCallable.js

@@ -1,11 +1,6 @@
 import test from 'ava';
 
-import {
-	fromString,
-	toAsyncCallable,
-	fromCallable,
-	toString,
-} from '../../src/index.js';
+import {fromString, toAsyncCallable, fromCallable, toString} from '#module';
 
 /**
  * @test {toAsyncCallable}

test/src/unread.js

@@ -1,11 +1,6 @@
 import test from 'ava';
 
-import {
-	fromString,
-	toAsyncCallable,
-	fromCallable,
-	toString,
-} from '../../src/index.js';
+import {fromString, toAsyncCallable, fromCallable, toString} from '#module';
 
 /**
  * @test {Tape#unread}