diff -r 000000000000 -r 6474c204b198 testing/modules/tests/xpcshell/test_assert.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testing/modules/tests/xpcshell/test_assert.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,302 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test cases borrowed and adapted from:
+// https://github.com/joyent/node/blob/6101eb184db77d0b11eb96e48744e57ecce4b73d/test/simple/test-assert.js
+// MIT license: http://opensource.org/licenses/MIT
+
+function run_test() {
+  let ns = {};
+  Components.utils.import("resource://testing-common/Assert.jsm", ns);
+  let assert = new ns.Assert();
+
+  function makeBlock(f, ...args) {
+    return function() {
+      return f.apply(assert, args);
+    };
+  }
+
+  function protoCtrChain(o) {
+    let result = [];
+    while (o = o.__proto__) {
+      result.push(o.constructor);
+    }
+    return result.join();
+  }
+
+  function indirectInstanceOf(obj, cls) {
+    if (obj instanceof cls) {
+      return true;
+    }
+    let clsChain = protoCtrChain(cls.prototype);
+    let objChain = protoCtrChain(obj);
+    return objChain.slice(-clsChain.length) === clsChain;
+  };
+
+  assert.ok(indirectInstanceOf(ns.Assert.AssertionError.prototype, Error),
+            "Assert.AssertionError instanceof Error");
+
+  assert.throws(makeBlock(assert.ok, false),
+                ns.Assert.AssertionError, "ok(false)");
+
+  assert.ok(true, "ok(true)");
+
+  assert.ok("test", "ok('test')");
+
+  assert.throws(makeBlock(assert.equal, true, false), ns.Assert.AssertionError, "equal");
+
+  assert.equal(null, null, "equal");
+
+  assert.equal(undefined, undefined, "equal");
+
+  assert.equal(null, undefined, "equal");
+
+  assert.equal(true, true, "equal");
+
+  assert.notEqual(true, false, "notEqual");
+
+  assert.throws(makeBlock(assert.notEqual, true, true),
+                ns.Assert.AssertionError, "notEqual");
+
+  assert.throws(makeBlock(assert.strictEqual, 2, "2"),
+                ns.Assert.AssertionError, "strictEqual");
+
+  assert.throws(makeBlock(assert.strictEqual, null, undefined),
+                ns.Assert.AssertionError, "strictEqual");
+
+  assert.notStrictEqual(2, "2", "notStrictEqual");
+
+  // deepEquals joy!
+  // 7.2
+  assert.deepEqual(new Date(2000, 3, 14), new Date(2000, 3, 14), "deepEqual date");
+
+  assert.throws(makeBlock(assert.deepEqual, new Date(), new Date(2000, 3, 14)),
+                ns.Assert.AssertionError,
+                "deepEqual date");
+
+  // 7.3
+  assert.deepEqual(/a/, /a/);
+  assert.deepEqual(/a/g, /a/g);
+  assert.deepEqual(/a/i, /a/i);
+  assert.deepEqual(/a/m, /a/m);
+  assert.deepEqual(/a/igm, /a/igm);
+  assert.throws(makeBlock(assert.deepEqual, /ab/, /a/));
+  assert.throws(makeBlock(assert.deepEqual, /a/g, /a/));
+  assert.throws(makeBlock(assert.deepEqual, /a/i, /a/));
+  assert.throws(makeBlock(assert.deepEqual, /a/m, /a/));
+  assert.throws(makeBlock(assert.deepEqual, /a/igm, /a/im));
+
+  let re1 = /a/;
+  re1.lastIndex = 3;
+  assert.throws(makeBlock(assert.deepEqual, re1, /a/));
+
+  // 7.4
+  assert.deepEqual(4, "4", "deepEqual == check");
+  assert.deepEqual(true, 1, "deepEqual == check");
+  assert.throws(makeBlock(assert.deepEqual, 4, "5"),
+                ns.Assert.AssertionError,
+                "deepEqual == check");
+
+  // 7.5
+  // having the same number of owned properties && the same set of keys
+  assert.deepEqual({a: 4}, {a: 4});
+  assert.deepEqual({a: 4, b: "2"}, {a: 4, b: "2"});
+  assert.deepEqual([4], ["4"]);
+  assert.throws(makeBlock(assert.deepEqual, {a: 4}, {a: 4, b: true}),
+                ns.Assert.AssertionError);
+  assert.deepEqual(["a"], {0: "a"});
+
+  let a1 = [1, 2, 3];
+  let a2 = [1, 2, 3];
+  a1.a = "test";
+  a1.b = true;
+  a2.b = true;
+  a2.a = "test";
+  assert.throws(makeBlock(assert.deepEqual, Object.keys(a1), Object.keys(a2)),
+                ns.Assert.AssertionError);
+  assert.deepEqual(a1, a2);
+
+  let nbRoot = {
+    toString: function() { return this.first + " " + this.last; }
+  };
+
+  function nameBuilder(first, last) {
+    this.first = first;
+    this.last = last;
+    return this;
+  }
+  nameBuilder.prototype = nbRoot;
+
+  function nameBuilder2(first, last) {
+    this.first = first;
+    this.last = last;
+    return this;
+  }
+  nameBuilder2.prototype = nbRoot;
+
+  let nb1 = new nameBuilder("Ryan", "Dahl");
+  let nb2 = new nameBuilder2("Ryan", "Dahl");
+
+  assert.deepEqual(nb1, nb2);
+
+  nameBuilder2.prototype = Object;
+  nb2 = new nameBuilder2("Ryan", "Dahl");
+  assert.throws(makeBlock(assert.deepEqual, nb1, nb2), ns.Assert.AssertionError);
+
+  // String literal + object
+  assert.throws(makeBlock(assert.deepEqual, "a", {}), ns.Assert.AssertionError);
+
+  // Testing the throwing
+  function thrower(errorConstructor) {
+    throw new errorConstructor("test");
+  }
+  let aethrow = makeBlock(thrower, ns.Assert.AssertionError);
+  aethrow = makeBlock(thrower, ns.Assert.AssertionError);
+
+  // the basic calls work
+  assert.throws(makeBlock(thrower, ns.Assert.AssertionError),
+                ns.Assert.AssertionError, "message");
+  assert.throws(makeBlock(thrower, ns.Assert.AssertionError), ns.Assert.AssertionError);
+  assert.throws(makeBlock(thrower, ns.Assert.AssertionError));
+
+  // if not passing an error, catch all.
+  assert.throws(makeBlock(thrower, TypeError));
+
+  // when passing a type, only catch errors of the appropriate type
+  let threw = false;
+  try {
+    assert.throws(makeBlock(thrower, TypeError), ns.Assert.AssertionError);
+  } catch (e) {
+    threw = true;
+    assert.ok(e instanceof TypeError, "type");
+  }
+  assert.equal(true, threw,
+               "Assert.throws with an explicit error is eating extra errors",
+               ns.Assert.AssertionError);
+  threw = false;
+
+  function ifError(err) {
+    if (err) {
+      throw err;
+    }
+  }
+  assert.throws(function() {
+    ifError(new Error("test error"));
+  });
+
+  // make sure that validating using constructor really works
+  threw = false;
+  try {
+    assert.throws(
+      function() {
+        throw ({});
+      },
+      Array
+    );
+  } catch (e) {
+    threw = true;
+  }
+  assert.ok(threw, "wrong constructor validation");
+
+  // use a RegExp to validate error message
+  assert.throws(makeBlock(thrower, TypeError), /test/);
+
+  // use a fn to validate error object
+  assert.throws(makeBlock(thrower, TypeError), function(err) {
+    if ((err instanceof TypeError) && /test/.test(err)) {
+      return true;
+    }
+  });
+
+  // Make sure deepEqual doesn't loop forever on circular refs
+
+  let b = {};
+  b.b = b;
+
+  let c = {};
+  c.b = c;
+
+  let gotError = false;
+  try {
+    assert.deepEqual(b, c);
+  } catch (e) {
+    gotError = true;
+  }
+
+  dump("All OK\n");
+  assert.ok(gotError);
+
+  function testAssertionMessage(actual, expected) {
+    try {
+      assert.equal(actual, "");
+    } catch (e) {
+      assert.equal(e.toString(),
+          ["AssertionError:", expected, "==", '""'].join(" "));
+    }
+  }
+  testAssertionMessage(undefined, '"undefined"');
+  testAssertionMessage(null, "null");
+  testAssertionMessage(true, "true");
+  testAssertionMessage(false, "false");
+  testAssertionMessage(0, "0");
+  testAssertionMessage(100, "100");
+  testAssertionMessage(NaN, '"NaN"');
+  testAssertionMessage(Infinity, '"Infinity"');
+  testAssertionMessage(-Infinity, '"-Infinity"');
+  testAssertionMessage("", '""');
+  testAssertionMessage("foo", '"foo"');
+  testAssertionMessage([], "[]");
+  testAssertionMessage([1, 2, 3], "[1,2,3]");
+  testAssertionMessage(/a/, '"/a/"');
+  testAssertionMessage(/abc/gim, '"/abc/gim"');
+  testAssertionMessage(function f() {}, '"function f() {}"');
+  testAssertionMessage({}, "{}");
+  testAssertionMessage({a: undefined, b: null}, '{"a":"undefined","b":null}');
+  testAssertionMessage({a: NaN, b: Infinity, c: -Infinity},
+      '{"a":"NaN","b":"Infinity","c":"-Infinity"}');
+
+  // https://github.com/joyent/node/issues/2893
+  try {
+    assert.throws(function () {
+      ifError(null);
+    });
+  } catch (e) {
+    threw = true;
+    assert.equal(e.message, "Missing expected exception..");
+  }
+  assert.ok(threw);
+
+  // https://github.com/joyent/node/issues/5292
+  try {
+    assert.equal(1, 2);
+  } catch (e) {
+    assert.equal(e.toString().split("\n")[0], "AssertionError: 1 == 2")
+  }
+
+  try {
+    assert.equal(1, 2, "oh no");
+  } catch (e) {
+    assert.equal(e.toString().split("\n")[0], "AssertionError: oh no - 1 == 2")
+  }
+
+  // Export Assert.jsm methods to become globally accessible.
+  export_assertions();
+
+  // Test XPCShell-test integration:
+  ok(true, "OK, this went well");
+  deepEqual(/a/g, /a/g, "deep equal should work on RegExp");
+  deepEqual(/a/igm, /a/igm, "deep equal should work on RegExp");
+  deepEqual({a: 4, b: "1"}, {b: "1", a: 4}, "deep equal should work on regular Object");
+  deepEqual(a1, a2, "deep equal should work on Array with Object properties");
+
+  // Test robustness of reporting:
+  equal(new ns.Assert.AssertionError({
+    actual: {
+      toJSON: function() {
+        throw "bam!";
+      }
+    },
+    expected: "foo",
+    operator: "="
+  }).message, "[object Object] = \"foo\"");
+}