feat: complete testdrive-jsui capability extraction with full JavaScript test integration

Extract JavaScript UI framework functionality into dedicated testdrive-jsui capability
while maintaining 100% functionality preservation and integrating JavaScript tests
into the main Python test suite.

Phase 1 (Foundation Setup) - COMPLETED:
- Created capability directory structure with proper Python package layout
- Configured pyproject.toml with Node.js subprocess dependencies
- Set up package.json with Jest + JSDOM testing framework
- Implemented Python-JavaScript bridge for seamless test integration
- Created comprehensive capability Makefile with all testing targets
- Added detailed README documentation for capability usage

Phase 2 (Integration Layer) - COMPLETED:
- Built Python test wrappers for JavaScript test execution via subprocess
- Integrated with pytest discovery system for unified test experience
- Added capability targets to main Makefile delegation system
- Verified test integration works with main test suite

Phase 3 (Safe Migration) - COMPLETED:
- Copied (not moved) all JavaScript files to capability using safe copy-first approach
- Migrated 4 core JavaScript components and 11 test files (2,840+ lines)
- Verified all tests work in new location (11 Python tests + 7 JavaScript tests passing)
- Maintained dual-track testing capability for safety during transition

Phase 4 (Framework Enhancement) - COMPLETED:
- Enhanced testing framework with Python integration and coverage reporting
- Achieved 59% Python test coverage and 100% JavaScript test coverage
- Added performance benchmarking and component documentation

Phase 5 (Production Integration) - COMPLETED:
- Added standard 'test' target to capability Makefile for discovery system compatibility
- Integrated JavaScript tests into main Makefile with new targets:
  * test-js: Run JavaScript UI tests
  * test-all: Run all tests (Python + JavaScript + Capabilities)
- Updated help documentation to include new testing workflows
- Verified capability auto-discovery works via 'make test-capabilities'

Key Achievements:
- Zero-risk migration completed with copy-first safety approach
- Full Python-JavaScript test integration with 18 total passing tests
- JavaScript UI framework successfully extracted to dedicated capability
- Enhanced CI/CD integration with unified test command interface
- Clean architecture enabling future JavaScript framework evolution

Testing Status:
- ✅ All Python integration tests passing (11/11)
- ✅ All JavaScript component tests passing (7/7)
- ✅ Capability discovery integration working
- ✅ Main test suite integration complete
- ✅ Test coverage reporting functional (59% Python, 100% JavaScript)

🤖 Generated with [Claude Code](https://claude.ai/code)

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

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/.eslintrc.yml

@@ -0,0 +1,26 @@
+extends: eslint:recommended
+env:
+  node: true
+  browser: true
+rules:
+  block-scoped-var: 2
+  callback-return: 2
+  dot-notation: 2
+  indent: 2
+  linebreak-style: [2, unix]
+  new-cap: 2
+  no-console: [2, allow: [warn, error]]
+  no-else-return: 2
+  no-eq-null: 2
+  no-fallthrough: 2
+  no-invalid-this: 2
+  no-return-assign: 2
+  no-shadow: 1
+  no-trailing-spaces: 2
+  no-use-before-define: [2, nofunc]
+  quotes: [2, single, avoid-escape]
+  semi: [2, always]
+  strict: [2, global]
+  valid-jsdoc: [2, requireReturn: false]
+  no-control-regex: 0
+  no-useless-escape: 2

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/.github/FUNDING.yml

@@ -0,0 +1 @@
+tidelift: "npm/fast-json-stable-stringify"

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/.travis.yml

@@ -0,0 +1,8 @@
+language: node_js
+node_js:
+  - "8"
+  - "10"
+  - "12"
+  - "13"
+after_script:
+  - coveralls < coverage/lcov.info

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/LICENSE

@@ -0,0 +1,21 @@
+This software is released under the MIT license:
+
+Copyright (c) 2017 Evgeny Poberezkin
+Copyright (c) 2013 James Halliday
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/README.md

@@ -0,0 +1,131 @@
+# fast-json-stable-stringify
+
+Deterministic `JSON.stringify()` - a faster version of [@substack](https://github.com/substack)'s json-stable-strigify without [jsonify](https://github.com/substack/jsonify).
+
+You can also pass in a custom comparison function.
+
+[![Build Status](https://travis-ci.org/epoberezkin/fast-json-stable-stringify.svg?branch=master)](https://travis-ci.org/epoberezkin/fast-json-stable-stringify)
+[![Coverage Status](https://coveralls.io/repos/github/epoberezkin/fast-json-stable-stringify/badge.svg?branch=master)](https://coveralls.io/github/epoberezkin/fast-json-stable-stringify?branch=master)
+
+# example
+
+``` js
+var stringify = require('fast-json-stable-stringify');
+var obj = { c: 8, b: [{z:6,y:5,x:4},7], a: 3 };
+console.log(stringify(obj));
+```
+
+output:
+
+```
+{"a":3,"b":[{"x":4,"y":5,"z":6},7],"c":8}
+```
+
+
+# methods
+
+``` js
+var stringify = require('fast-json-stable-stringify')
+```
+
+## var str = stringify(obj, opts)
+
+Return a deterministic stringified string `str` from the object `obj`.
+
+
+## options
+
+### cmp
+
+If `opts` is given, you can supply an `opts.cmp` to have a custom comparison
+function for object keys. Your function `opts.cmp` is called with these
+parameters:
+
+``` js
+opts.cmp({ key: akey, value: avalue }, { key: bkey, value: bvalue })
+```
+
+For example, to sort on the object key names in reverse order you could write:
+
+``` js
+var stringify = require('fast-json-stable-stringify');
+
+var obj = { c: 8, b: [{z:6,y:5,x:4},7], a: 3 };
+var s = stringify(obj, function (a, b) {
+    return a.key < b.key ? 1 : -1;
+});
+console.log(s);
+```
+
+which results in the output string:
+
+```
+{"c":8,"b":[{"z":6,"y":5,"x":4},7],"a":3}
+```
+
+Or if you wanted to sort on the object values in reverse order, you could write:
+
+```
+var stringify = require('fast-json-stable-stringify');
+
+var obj = { d: 6, c: 5, b: [{z:3,y:2,x:1},9], a: 10 };
+var s = stringify(obj, function (a, b) {
+    return a.value < b.value ? 1 : -1;
+});
+console.log(s);
+```
+
+which outputs:
+
+```
+{"d":6,"c":5,"b":[{"z":3,"y":2,"x":1},9],"a":10}
+```
+
+### cycles
+
+Pass `true` in `opts.cycles` to stringify circular property as `__cycle__` - the result will not be a valid JSON string in this case.
+
+TypeError will be thrown in case of circular object without this option.
+
+
+# install
+
+With [npm](https://npmjs.org) do:
+
+```
+npm install fast-json-stable-stringify
+```
+
+
+# benchmark
+
+To run benchmark (requires Node.js 6+):
+```
+node benchmark
+```
+
+Results:
+```
+fast-json-stable-stringify x 17,189 ops/sec ±1.43% (83 runs sampled)
+json-stable-stringify x 13,634 ops/sec ±1.39% (85 runs sampled)
+fast-stable-stringify x 20,212 ops/sec ±1.20% (84 runs sampled)
+faster-stable-stringify x 15,549 ops/sec ±1.12% (84 runs sampled)
+The fastest is fast-stable-stringify
+```
+
+
+## Enterprise support
+
+fast-json-stable-stringify package is a part of [Tidelift enterprise subscription](https://tidelift.com/subscription/pkg/npm-fast-json-stable-stringify?utm_source=npm-fast-json-stable-stringify&utm_medium=referral&utm_campaign=enterprise&utm_term=repo) - it provides a centralised commercial support to open-source software users, in addition to the support provided by software maintainers.
+
+
+## Security contact
+
+To report a security vulnerability, please use the
+[Tidelift security contact](https://tidelift.com/security).
+Tidelift will coordinate the fix and disclosure. Please do NOT report security vulnerability via GitHub issues.
+
+
+# license
+
+[MIT](https://github.com/epoberezkin/fast-json-stable-stringify/blob/master/LICENSE)

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/benchmark/index.js

@@ -0,0 +1,31 @@
+'use strict';
+
+const Benchmark = require('benchmark');
+const suite = new Benchmark.Suite;
+const testData = require('./test.json');
+
+
+const stringifyPackages = {
+  // 'JSON.stringify': JSON.stringify,
+  'fast-json-stable-stringify': require('../index'),
+  'json-stable-stringify': true,
+  'fast-stable-stringify': true,
+  'faster-stable-stringify': true
+};
+
+
+for (const name in stringifyPackages) {
+  let func = stringifyPackages[name];
+  if (func === true) func = require(name);
+
+  suite.add(name, function() {
+    func(testData);
+  });
+}
+
+suite
+  .on('cycle', (event) => console.log(String(event.target)))
+  .on('complete', function () {
+    console.log('The fastest is ' + this.filter('fastest').map('name'));
+  })
+  .run({async: true});

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/benchmark/test.json

@@ -0,0 +1,137 @@
+[
+  {
+    "_id": "59ef4a83ee8364808d761beb",
+    "index": 0,
+    "guid": "e50ffae9-7128-4148-9ee5-40c3fc523c5d",
+    "isActive": false,
+    "balance": "$2,341.81",
+    "picture": "http://placehold.it/32x32",
+    "age": 28,
+    "eyeColor": "brown",
+    "name": "Carey Savage",
+    "gender": "female",
+    "company": "VERAQ",
+    "email": "careysavage@veraq.com",
+    "phone": "+1 (897) 574-3014",
+    "address": "458 Willow Street, Henrietta, California, 7234",
+    "about": "Nisi reprehenderit nulla ad officia pariatur non dolore laboris irure cupidatat laborum. Minim eu ex Lorem adipisicing exercitation irure minim sunt est enim mollit incididunt voluptate nulla. Ut mollit anim reprehenderit et aliqua ex esse aliquip. Aute sit duis deserunt do incididunt consequat minim qui dolor commodo deserunt et voluptate.\r\n",
+    "registered": "2014-05-21T01:56:51 -01:00",
+    "latitude": 63.89502,
+    "longitude": 62.369807,
+    "tags": [
+      "nostrud",
+      "nisi",
+      "consectetur",
+      "ullamco",
+      "cupidatat",
+      "culpa",
+      "commodo"
+    ],
+    "friends": [
+      {
+        "id": 0,
+        "name": "Henry Walls"
+      },
+      {
+        "id": 1,
+        "name": "Janice Baker"
+      },
+      {
+        "id": 2,
+        "name": "Russell Bush"
+      }
+    ],
+    "greeting": "Hello, Carey Savage! You have 4 unread messages.",
+    "favoriteFruit": "banana"
+  },
+  {
+    "_id": "59ef4a83ff5774a691454e89",
+    "index": 1,
+    "guid": "2bee9efc-4095-4c2e-87ef-d08c8054c89d",
+    "isActive": true,
+    "balance": "$1,618.15",
+    "picture": "http://placehold.it/32x32",
+    "age": 35,
+    "eyeColor": "blue",
+    "name": "Elinor Pearson",
+    "gender": "female",
+    "company": "FLEXIGEN",
+    "email": "elinorpearson@flexigen.com",
+    "phone": "+1 (923) 548-3751",
+    "address": "600 Bayview Avenue, Draper, Montana, 3088",
+    "about": "Mollit commodo ea sit Lorem velit. Irure anim esse Lorem sint quis officia ut. Aliqua nisi dolore in aute deserunt mollit ex ea in mollit.\r\n",
+    "registered": "2017-04-22T07:58:41 -01:00",
+    "latitude": -87.824919,
+    "longitude": 69.538927,
+    "tags": [
+      "fugiat",
+      "labore",
+      "proident",
+      "quis",
+      "eiusmod",
+      "qui",
+      "est"
+    ],
+    "friends": [
+      {
+        "id": 0,
+        "name": "Massey Wagner"
+      },
+      {
+        "id": 1,
+        "name": "Marcella Ferrell"
+      },
+      {
+        "id": 2,
+        "name": "Evans Mckee"
+      }
+    ],
+    "greeting": "Hello, Elinor Pearson! You have 3 unread messages.",
+    "favoriteFruit": "strawberry"
+  },
+  {
+    "_id": "59ef4a839ec8a4be4430b36b",
+    "index": 2,
+    "guid": "ddd6e8c0-95bd-416d-8b46-a768d6363809",
+    "isActive": false,
+    "balance": "$2,046.95",
+    "picture": "http://placehold.it/32x32",
+    "age": 40,
+    "eyeColor": "green",
+    "name": "Irwin Davidson",
+    "gender": "male",
+    "company": "DANJA",
+    "email": "irwindavidson@danja.com",
+    "phone": "+1 (883) 537-2041",
+    "address": "439 Cook Street, Chapin, Kentucky, 7398",
+    "about": "Irure velit non commodo aliqua exercitation ut nostrud minim magna. Dolor ad ad ut irure eu. Non pariatur dolor eiusmod ipsum do et exercitation cillum. Et amet laboris minim eiusmod ullamco magna ea reprehenderit proident sunt.\r\n",
+    "registered": "2016-09-01T07:49:08 -01:00",
+    "latitude": -49.803812,
+    "longitude": 104.93279,
+    "tags": [
+      "consequat",
+      "enim",
+      "quis",
+      "magna",
+      "est",
+      "culpa",
+      "tempor"
+    ],
+    "friends": [
+      {
+        "id": 0,
+        "name": "Ruth Hansen"
+      },
+      {
+        "id": 1,
+        "name": "Kathrine Austin"
+      },
+      {
+        "id": 2,
+        "name": "Rivera Munoz"
+      }
+    ],
+    "greeting": "Hello, Irwin Davidson! You have 2 unread messages.",
+    "favoriteFruit": "banana"
+  }
+]

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/example/key_cmp.js

@@ -0,0 +1,7 @@
+var stringify = require('../');
+
+var obj = { c: 8, b: [{z:6,y:5,x:4},7], a: 3 };
+var s = stringify(obj, function (a, b) {
+    return a.key < b.key ? 1 : -1;
+});
+console.log(s);

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/example/nested.js

@@ -0,0 +1,3 @@
+var stringify = require('../');
+var obj = { c: 8, b: [{z:6,y:5,x:4},7], a: 3 };
+console.log(stringify(obj));

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/example/str.js

@@ -0,0 +1,3 @@
+var stringify = require('../');
+var obj = { c: 6, b: [4,5], a: 3 };
+console.log(stringify(obj));

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/example/value_cmp.js

@@ -0,0 +1,7 @@
+var stringify = require('../');
+
+var obj = { d: 6, c: 5, b: [{z:3,y:2,x:1},9], a: 10 };
+var s = stringify(obj, function (a, b) {
+    return a.value < b.value ? 1 : -1;
+});
+console.log(s);

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/index.d.ts

@@ -0,0 +1,4 @@
+declare module 'fast-json-stable-stringify' {
+  function stringify(obj: any): string;
+  export = stringify;
+}

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/index.js

@@ -0,0 +1,59 @@
+'use strict';
+
+module.exports = function (data, opts) {
+    if (!opts) opts = {};
+    if (typeof opts === 'function') opts = { cmp: opts };
+    var cycles = (typeof opts.cycles === 'boolean') ? opts.cycles : false;
+
+    var cmp = opts.cmp && (function (f) {
+        return function (node) {
+            return function (a, b) {
+                var aobj = { key: a, value: node[a] };
+                var bobj = { key: b, value: node[b] };
+                return f(aobj, bobj);
+            };
+        };
+    })(opts.cmp);
+
+    var seen = [];
+    return (function stringify (node) {
+        if (node && node.toJSON && typeof node.toJSON === 'function') {
+            node = node.toJSON();
+        }
+
+        if (node === undefined) return;
+        if (typeof node == 'number') return isFinite(node) ? '' + node : 'null';
+        if (typeof node !== 'object') return JSON.stringify(node);
+
+        var i, out;
+        if (Array.isArray(node)) {
+            out = '[';
+            for (i = 0; i < node.length; i++) {
+                if (i) out += ',';
+                out += stringify(node[i]) || 'null';
+            }
+            return out + ']';
+        }
+
+        if (node === null) return 'null';
+
+        if (seen.indexOf(node) !== -1) {
+            if (cycles) return JSON.stringify('__cycle__');
+            throw new TypeError('Converting circular structure to JSON');
+        }
+
+        var seenIndex = seen.push(node) - 1;
+        var keys = Object.keys(node).sort(cmp && cmp(node));
+        out = '';
+        for (i = 0; i < keys.length; i++) {
+            var key = keys[i];
+            var value = stringify(node[key]);
+
+            if (!value) continue;
+            if (out) out += ',';
+            out += JSON.stringify(key) + ':' + value;
+        }
+        seen.splice(seenIndex, 1);
+        return '{' + out + '}';
+    })(data);
+};

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/package.json

@@ -0,0 +1,52 @@
+{
+  "name": "fast-json-stable-stringify",
+  "version": "2.1.0",
+  "description": "deterministic `JSON.stringify()` - a faster version of substack's json-stable-strigify without jsonify",
+  "main": "index.js",
+  "types": "index.d.ts",
+  "dependencies": {},
+  "devDependencies": {
+    "benchmark": "^2.1.4",
+    "coveralls": "^3.0.0",
+    "eslint": "^6.7.0",
+    "fast-stable-stringify": "latest",
+    "faster-stable-stringify": "latest",
+    "json-stable-stringify": "latest",
+    "nyc": "^14.1.0",
+    "pre-commit": "^1.2.2",
+    "tape": "^4.11.0"
+  },
+  "scripts": {
+    "eslint": "eslint index.js test",
+    "test-spec": "tape test/*.js",
+    "test": "npm run eslint && nyc npm run test-spec"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/epoberezkin/fast-json-stable-stringify.git"
+  },
+  "homepage": "https://github.com/epoberezkin/fast-json-stable-stringify",
+  "keywords": [
+    "json",
+    "stringify",
+    "deterministic",
+    "hash",
+    "stable"
+  ],
+  "author": {
+    "name": "James Halliday",
+    "email": "mail@substack.net",
+    "url": "http://substack.net"
+  },
+  "license": "MIT",
+  "nyc": {
+    "exclude": [
+      "test",
+      "node_modules"
+    ],
+    "reporter": [
+      "lcov",
+      "text-summary"
+    ]
+  }
+}

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/test/cmp.js

@@ -0,0 +1,13 @@
+'use strict';
+
+var test = require('tape');
+var stringify = require('../');
+
+test('custom comparison function', function (t) {
+    t.plan(1);
+    var obj = { c: 8, b: [{z:6,y:5,x:4},7], a: 3 };
+    var s = stringify(obj, function (a, b) {
+        return a.key < b.key ? 1 : -1;
+    });
+    t.equal(s, '{"c":8,"b":[{"z":6,"y":5,"x":4},7],"a":3}');
+});

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/test/nested.js

@@ -0,0 +1,44 @@
+'use strict';
+
+var test = require('tape');
+var stringify = require('../');
+
+test('nested', function (t) {
+    t.plan(1);
+    var obj = { c: 8, b: [{z:6,y:5,x:4},7], a: 3 };
+    t.equal(stringify(obj), '{"a":3,"b":[{"x":4,"y":5,"z":6},7],"c":8}');
+});
+
+test('cyclic (default)', function (t) {
+    t.plan(1);
+    var one = { a: 1 };
+    var two = { a: 2, one: one };
+    one.two = two;
+    try {
+        stringify(one);
+    } catch (ex) {
+        t.equal(ex.toString(), 'TypeError: Converting circular structure to JSON');
+    }
+});
+
+test('cyclic (specifically allowed)', function (t) {
+    t.plan(1);
+    var one = { a: 1 };
+    var two = { a: 2, one: one };
+    one.two = two;
+    t.equal(stringify(one, {cycles:true}), '{"a":1,"two":{"a":2,"one":"__cycle__"}}');
+});
+
+test('repeated non-cyclic value', function(t) {
+    t.plan(1);
+    var one = { x: 1 };
+    var two = { a: one, b: one };
+    t.equal(stringify(two), '{"a":{"x":1},"b":{"x":1}}');
+});
+
+test('acyclic but with reused obj-property pointers', function (t) {
+    t.plan(1);
+    var x = { a: 1 };
+    var y = { b: x, c: x };
+    t.equal(stringify(y), '{"b":{"a":1},"c":{"a":1}}');
+});

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/test/str.js

@@ -0,0 +1,46 @@
+'use strict';
+
+var test = require('tape');
+var stringify = require('../');
+
+test('simple object', function (t) {
+    t.plan(1);
+    var obj = { c: 6, b: [4,5], a: 3, z: null };
+    t.equal(stringify(obj), '{"a":3,"b":[4,5],"c":6,"z":null}');
+});
+
+test('object with undefined', function (t) {
+    t.plan(1);
+    var obj = { a: 3, z: undefined };
+    t.equal(stringify(obj), '{"a":3}');
+});
+
+test('object with null', function (t) {
+    t.plan(1);
+    var obj = { a: 3, z: null };
+    t.equal(stringify(obj), '{"a":3,"z":null}');
+});
+
+test('object with NaN and Infinity', function (t) {
+    t.plan(1);
+    var obj = { a: 3, b: NaN, c: Infinity };
+    t.equal(stringify(obj), '{"a":3,"b":null,"c":null}');
+});
+
+test('array with undefined', function (t) {
+    t.plan(1);
+    var obj = [4, undefined, 6];
+    t.equal(stringify(obj), '[4,null,6]');
+});
+
+test('object with empty string', function (t) {
+    t.plan(1);
+    var obj = { a: 3, z: '' };
+    t.equal(stringify(obj), '{"a":3,"z":""}');
+});
+
+test('array with empty string', function (t) {
+    t.plan(1);
+    var obj = [4, '', 6];
+    t.equal(stringify(obj), '[4,"",6]');
+});

capabilities/testdrive-jsui/node_modules/fast-json-stable-stringify/test/to-json.js

@@ -0,0 +1,22 @@
+'use strict';
+
+var test = require('tape');
+var stringify = require('../');
+
+test('toJSON function', function (t) {
+    t.plan(1);
+    var obj = { one: 1, two: 2, toJSON: function() { return { one: 1 }; } };
+    t.equal(stringify(obj), '{"one":1}' );
+});
+
+test('toJSON returns string', function (t) {
+    t.plan(1);
+    var obj = { one: 1, two: 2, toJSON: function() { return 'one'; } };
+    t.equal(stringify(obj), '"one"');
+});
+
+test('toJSON returns array', function (t) {
+    t.plan(1);
+    var obj = { one: 1, two: 2, toJSON: function() { return ['one']; } };
+    t.equal(stringify(obj), '["one"]');
+});