1 files changed, 188 insertions, 0 deletions
diff --git a/toolkit/components/extensions/ext-c-test.js b/toolkit/components/extensions/ext-c-test.js
new file mode 100644
index 000000000..b0c92f79f
--- /dev/null
+++ b/toolkit/components/extensions/ext-c-test.js
@@ -0,0 +1,188 @@
+"use strict";
+
+Components.utils.import("resource://gre/modules/ExtensionUtils.jsm");
+var {
+  SingletonEventManager,
+} = ExtensionUtils;
+
+/**
+ * Checks whether the given error matches the given expectations.
+ *
+ * @param {*} error
+ *        The error to check.
+ * @param {string|RegExp|function|null} expectedError
+ *        The expectation to check against. If this parameter is:
+ *
+ *        - a string, the error message must exactly equal the string.
+ *        - a regular expression, it must match the error message.
+ *        - a function, it is called with the error object and its
+ *          return value is returned.
+ *        - null, the function always returns true.
+ * @param {BaseContext} context
+ *
+ * @returns {boolean}
+ *        True if the error matches the expected error.
+ */
+function errorMatches(error, expectedError, context) {
+  if (expectedError === null) {
+    return true;
+  }
+
+  if (typeof expectedError === "function") {
+    return context.runSafeWithoutClone(expectedError, error);
+  }
+
+  if (typeof error !== "object" || error == null ||
+      typeof error.message !== "string") {
+    return false;
+  }
+
+  if (typeof expectedError === "string") {
+    return error.message === expectedError;
+  }
+
+  try {
+    return expectedError.test(error.message);
+  } catch (e) {
+    Cu.reportError(e);
+  }
+
+  return false;
+}
+
+/**
+ * Calls .toSource() on the given value, but handles null, undefined,
+ * and errors.
+ *
+ * @param {*} value
+ * @returns {string}
+ */
+function toSource(value) {
+  if (value === null) {
+    return "null";
+  }
+  if (value === undefined) {
+    return "undefined";
+  }
+  if (typeof value === "string") {
+    return JSON.stringify(value);
+  }
+
+  try {
+    return String(value.toSource());
+  } catch (e) {
+    return "<unknown>";
+  }
+}
+
+function makeTestAPI(context) {
+  const {extension} = context;
+
+  function getStack() {
+    return new context.cloneScope.Error().stack.replace(/^/gm, "    ");
+  }
+
+  function assertTrue(value, msg) {
+    extension.emit("test-result", Boolean(value), String(msg), getStack());
+  }
+
+  return {
+    test: {
+      sendMessage(...args) {
+        extension.emit("test-message", ...args);
+      },
+
+      notifyPass(msg) {
+        extension.emit("test-done", true, msg, getStack());
+      },
+
+      notifyFail(msg) {
+        extension.emit("test-done", false, msg, getStack());
+      },
+
+      log(msg) {
+        extension.emit("test-log", true, msg, getStack());
+      },
+
+      fail(msg) {
+        assertTrue(false, msg);
+      },
+
+      succeed(msg) {
+        assertTrue(true, msg);
+      },
+
+      assertTrue(value, msg) {
+        assertTrue(value, msg);
+      },
+
+      assertFalse(value, msg) {
+        assertTrue(!value, msg);
+      },
+
+      assertEq(expected, actual, msg) {
+        let equal = expected === actual;
+
+        expected = String(expected);
+        actual = String(actual);
+
+        if (!equal && expected === actual) {
+          actual += " (different)";
+        }
+        extension.emit("test-eq", equal, String(msg), expected, actual, getStack());
+      },
+
+      assertRejects(promise, expectedError, msg) {
+        // Wrap in a native promise for consistency.
+        promise = Promise.resolve(promise);
+
+        if (msg) {
+          msg = `: ${msg}`;
+        }
+
+        return promise.then(result => {
+          assertTrue(false, `Promise resolved, expected rejection${msg}`);
+        }, error => {
+          let errorMessage = toSource(error && error.message);
+
+          assertTrue(errorMatches(error, expectedError, context),
+                     `Promise rejected, expecting rejection to match ${toSource(expectedError)}, ` +
+                     `got ${errorMessage}${msg}`);
+        });
+      },
+
+      assertThrows(func, expectedError, msg) {
+        if (msg) {
+          msg = `: ${msg}`;
+        }
+
+        try {
+          func();
+
+          assertTrue(false, `Function did not throw, expected error${msg}`);
+        } catch (error) {
+          let errorMessage = toSource(error && error.message);
+
+          assertTrue(errorMatches(error, expectedError, context),
+                     `Function threw, expecting error to match ${toSource(expectedError)}` +
+                     `got ${errorMessage}${msg}`);
+        }
+      },
+
+      onMessage: new SingletonEventManager(context, "test.onMessage", fire => {
+        let handler = (event, ...args) => {
+          context.runSafe(fire, ...args);
+        };
+
+        extension.on("test-harness-message", handler);
+        return () => {
+          extension.off("test-harness-message", handler);
+        };
+      }).api(),
+    },
+  };
+}
+
+extensions.registerSchemaAPI("test", "addon_child", makeTestAPI);
+extensions.registerSchemaAPI("test", "content_child", makeTestAPI);
+