1 files changed, 95 insertions, 0 deletions
diff --git a/dom/encoding/test/unit/head.js b/dom/encoding/test/unit/head.js
new file mode 100644
index 000000000..116824509
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+++ b/dom/encoding/test/unit/head.js
@@ -0,0 +1,95 @@
+/**
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ *
+ * This is a shim for the W3C testharness.js, mapping those of
+ * its functions that we need to the testing/xpcshell/head.js API.
+ * See <http://www.w3.org/2008/webapps/wiki/Harness> for documentation.
+ * This shim does some tests a little differently than the W3C test
+ * harness; equality comparisons, especially, are less precise.
+ * The difference does not presently affect any test results.
+ *
+ * We use the lower-level do_report_result throughout this file,
+ * rather than the high-level xpcshell/head.js API that has near
+ * equivalents for the W3C assert_* functions, because only
+ * do_report_result allows us to provide Components.stack.caller.
+ */
+
+function assert_equals(a, b, msg) {
+  let text = msg + ": " + _wrap_with_quotes_if_necessary(a) +
+                 " == " + _wrap_with_quotes_if_necessary(b);
+  do_report_result(a == b, text, Components.stack.caller, false);
+}
+
+function assert_not_equals(a, b, msg) {
+  let text = msg + ": " + _wrap_with_quotes_if_necessary(a) +
+                 " != " + _wrap_with_quotes_if_necessary(b);
+  do_report_result(a != b, text, Components.stack.caller, false);
+}
+
+function assert_array_equals(a, b, msg) {
+  do_report_result(a.length == b.length,
+                   msg + ": (length) " + a.length + " == " + b.length,
+                   Components.stack.caller, false);
+  for (let i = 0; i < a.length; ++i) {
+    if (a[i] !== b[i]) {
+        do_report_result(false,
+                         msg + ": [" + i + "] " +
+                               _wrap_with_quotes_if_necessary(a[i]) +
+                               " === " +
+                               _wrap_with_quotes_if_necessary(b[i]),
+                         Components.stack.caller, false);
+    }
+  }
+  // If we get here, all array elements are equal.
+  do_report_result(true, msg + ": all array elements equal",
+                   Components.stack.caller, false);
+}
+
+function assert_true(cond, msg) {
+  do_report_result(!!cond, msg + ": " + uneval(cond),
+                   Components.stack.caller, false);
+}
+
+function assert_throws(ex, func) {
+  if (!('name' in ex))
+    do_throw("first argument to assert_throws must be of the form " +
+             "{'name': something}");
+
+  let msg = "expected to catch an exception named " + ex.name;
+
+  try {
+    func();
+  } catch (e) {
+    if ('name' in e)
+      do_report_result(e.name == ex.name,
+                       msg + ", got " + e.name,
+                       Components.stack.caller, false);
+    else
+      do_report_result(false,
+                       msg + ", got " + legible_exception(ex),
+                       Components.stack.caller, false);
+
+    return;
+  }
+
+  // Call this here, not in the 'try' clause, so do_report_result's own
+  // throw doesn't get caught by our 'catch' clause.
+  do_report_result(false, msg + ", but returned normally",
+                   Components.stack.caller, false);
+}
+
+var tests = [];
+
+function test(func, msg) {
+  tests.push({msg: msg, func: func,
+              filename: Components.stack.caller.filename });
+}
+
+function run_test() {
+  tests.forEach(function(t) {
+    do_print("test group: " + t.msg,
+             {source_file: t.filename});
+    t.func();
+  });
+};