Make browser tests work from file:// URLs

Load tests as classic scripts against the UMD build instead of ES
modules, which browsers block on file:// pages. Test files now take
Combinatorics from a global (set by 00-node.js in Node, by index.html
in the browser), like js-base64's test suite.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: dankogai

test/00-node.js

@@ -1,4 +1,6 @@
 import * as _chai from 'chai';
+import * as _combinatorics from '../combinatorics.js';
 global.chai = _chai;
 // global.chai = require('chai');
+global.Combinatorics = _combinatorics;
 global.isLegacySafari = false;

test/01-import.js

@@ -1,4 +1,3 @@
-import * as Combinatorics from '../combinatorics.js';
 describe('import', () => {
     for (const k in Combinatorics) {
         const tn = k === 'version' ? 'string' : 'function';

test/02-arithmetics.js

@@ -1,8 +1,8 @@
-import {
-    permutation, combination, factorial,factoradic
-} from '../combinatorics.js';
+var {
+    permutation, combination, factorial, factoradic
+} = Combinatorics;
 
-const $$ = chai.expect.bind(chai);
+var $$ = chai.expect.bind(chai);
 
 describe('permutation', () => {
     it('permutation(3,2) === 6', ()=>$$(permutation(3, 2)).to.equal(6n));

test/03-basen.js

@@ -1,6 +1,6 @@
-import { BaseN } from '../combinatorics.js';
+var { BaseN } = Combinatorics;
 
-const $$ = chai.expect.bind(chai);
+var $$ = chai.expect.bind(chai);
 
 describe('class BaseN', () => {
     let seed = '0123';

test/03-cartesianproduct.js

@@ -1,6 +1,6 @@
-import { CartesianProduct } from '../combinatorics.js';
+var { CartesianProduct } = Combinatorics;
 
-const $$ = chai.expect.bind(chai);
+var $$ = chai.expect.bind(chai);
 
 describe('class CartesianProduct', () => {
     let seed = [];

test/03-combination.js

@@ -1,6 +1,6 @@
-import { Combination } from '../combinatorics.js';
+var { Combination } = Combinatorics;
 
-const $$ = chai.expect.bind(chai);
+var $$ = chai.expect.bind(chai);
 
 describe('class Combination', () => {
     let seed = 'abcdefgh';

test/03-permcomb.js

@@ -1,6 +1,6 @@
-import { Permutation, Combination } from '../combinatorics.js';
+var { Permutation, Combination } = Combinatorics;
 
-const $$ = chai.expect.bind(chai);
+var $$ = chai.expect.bind(chai);
 
 class PermComb {
     constructor(seed) {

test/03-permutation.js

@@ -1,6 +1,6 @@
-import { Permutation } from '../combinatorics.js';
+var { Permutation } = Combinatorics;
 
-const $$ = chai.expect.bind(chai);
+var $$ = chai.expect.bind(chai);
 
 describe('class Permutation', () => {
     let seed = 'abcd';

test/03-powerset.js

@@ -1,6 +1,6 @@
-import { PowerSet } from '../combinatorics.js';
+var { PowerSet } = Combinatorics;
 
-const $$ = chai.expect.bind(chai);
+var $$ = chai.expect.bind(chai);
 
 describe('class PowerSet', () => {
     let seed = [];

test/index.html

@@ -22,17 +22,29 @@
   <script src="https://unpkg.com/chai@4.2.0/chai.js"></script>
   <script src="https://unpkg.com/mocha@8.0.1/mocha.js"></script>
   <script>mocha.setup('bdd')</script>
-  <script type="module" src="./01-import.js"></script>
-  <script type="module" src="./02-arithmetics.js"></script>
-  <script type="module" src="./03-permutation.js"></script>
-  <script type="module" src="./03-combination.js"></script>
-  <script type="module" src="./03-basen.js"></script>
-  <script type="module" src="./03-powerset.js"></script>
-  <script type="module" src="./03-permcomb.js"></script>
-  <script type="module">
+  <script>
+    /* minimal AMD shim so the UMD build registers as window.Combinatorics */
+    define = (deps, factory) => {
+      const exports = {};
+      factory(null, exports);
+      window.Combinatorics = exports;
+    };
+    define.amd = true;
+  </script>
+  <script src="../umd/combinatorics.js"></script>
+  <script>delete window.define;</script>
+  <script src="./01-import.js"></script>
+  <script src="./02-arithmetics.js"></script>
+  <script src="./03-permutation.js"></script>
+  <script src="./03-combination.js"></script>
+  <script src="./03-cartesianproduct.js"></script>
+  <script src="./03-basen.js"></script>
+  <script src="./03-powerset.js"></script>
+  <script src="./03-permcomb.js"></script>
+  <script defer>
     mocha.checkLeaks();
     mocha.run();
   </script>
 </body>
 
-</html>
+</html>