1 files changed, 92 insertions, 0 deletions
diff --git a/tests/content/harness.js b/tests/content/harness.js
new file mode 100644
index 00000000000..7dafac00b6e
--- /dev/null
+++ b/tests/content/harness.js
@@ -0,0 +1,92 @@
+function _oneline(x) {
+  var i = x.indexOf("\n");
+  return (i == -1) ? x : (x.slice(0, i) + "...");
+}
+
+var _expectations = 0;
+var _tests = 0;
+function expect(num) {
+  _expectations = num;
+}
+
+function _fail(s, m) {
+  _tests++;
+  // string split to avoid problems with tests that end up printing the value of window._fail.
+  window.alert(_oneline("TEST-UNEXPECTED" + "-FAIL | " + s + ": " + m));
+}
+
+function _pass(s, m) {
+  _tests++;
+  window.alert(_oneline("TEST-PASS | " + s + ": " + m));
+}
+
+function _printer(opstr, op) {
+  return function (a, b, msg) {
+    let f = op(a,b) ? _pass : _fail;
+    if (!msg) msg = "";
+    f(a + " " + opstr + " " + b, msg);
+  };
+}
+
+var is          = _printer("===",          function (a,b) { return a === b; });
+var is_not      = _printer("!==",          function (a,b) { return a !== b; });
+var is_a        = _printer("is a",         function (a,b) { return a instanceof b; });
+var is_not_a    = _printer("is not a",     function (a,b) { return !(a instanceof b); });
+var is_in       = _printer("is in",        function (a,b) { return a in b; });
+var is_not_in   = _printer("is not in",    function (a,b) { return !(a in b); });
+var as_str_is   = _printer("as string is", function (a,b) { return String(a) == b; });
+var lt          = _printer("<",            function (a,b) { return a <  b; });
+var gt          = _printer(">",            function (a,b) { return a >  b; });
+var leq         = _printer("<=",           function (a,b) { return a <= b; });
+var geq         = _printer(">=",           function (a,b) { return a >= b; });
+var starts_with = _printer("starts with",  function (a,b) { return a.indexOf(b) == 0; });
+
+function is_function(val, name) {
+  starts_with(String(val), "function " + name + "(");
+}
+
+function should_throw(f) {
+  try {
+    f();
+    _fail("operation should have thrown but did not");
+  } catch (x) {
+    _pass("operation successfully threw an exception", x.toString());
+  }
+}
+
+function should_not_throw(f) {
+  try {
+    f();
+    _pass("operation did not throw an exception");
+  } catch (x) {
+    _fail("operation should have not thrown", x.toString());
+  }
+}
+
+function check_selector(elem, selector, matches) {
+    is(elem.matches(selector), matches);
+}
+
+function check_disabled_selector(elem, disabled) {
+    check_selector(elem, ":disabled", disabled);
+    check_selector(elem, ":enabled", !disabled);
+}
+
+var _test_complete = false;
+var _test_timeout = 10000; //10 seconds
+function finish() {
+  if (_expectations > _tests) {
+    _fail('expected ' + _expectations + ' tests, fullfilled ' + _tests);
+  }
+  _test_complete = true;
+  window.close();
+}
+
+function _test_timed_out() {
+  if (!_test_complete) {
+    _fail('test timed out (' + _test_timeout/1000 + 's)');
+    finish();
+  }
+}
+
+setTimeout(_test_timed_out, _test_timeout);