1 files changed, 168 insertions, 0 deletions
diff --git a/toolkit/components/workerloader/tests/worker_test_loading.js b/toolkit/components/workerloader/tests/worker_test_loading.js
new file mode 100644
index 0000000000..551c56d7d3
--- /dev/null
+++ b/toolkit/components/workerloader/tests/worker_test_loading.js
@@ -0,0 +1,168 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/* eslint-env worker */
+
+"use strict";
+
+importScripts("utils_worker.js"); // Test suite code
+info("Test suite configured");
+
+/* import-globals-from /toolkit/components/workerloader/require.js */
+importScripts("resource://gre/modules/workers/require.js");
+info("Loader imported");
+
+var PATH =
+  "chrome://mochitests/content/chrome/toolkit/components/workerloader/tests/";
+var tests = [];
+var add_test = function (test) {
+  tests.push(test);
+};
+
+add_test(function test_setup() {
+  ok(typeof require != "undefined", "Function |require| is defined");
+});
+
+// Test simple loading (moduleA-depends.js requires moduleB-dependency.js)
+add_test(function test_load() {
+  let A = require(PATH + "moduleA-depends.js");
+  ok(true, "Opened module A");
+
+  is(A.A, true, "Module A exported value A");
+  ok(!("B" in A), "Module A did not export value B");
+  is(A.importedFoo, "foo", "Module A re-exported B.foo");
+
+  // re-evaluating moduleB-dependency.js would cause an error, but re-requiring it shouldn't
+  let B = require(PATH + "moduleB-dependency.js");
+  ok(true, "Managed to re-require module B");
+  is(B.B, true, "Module B exported value B");
+  is(B.foo, "foo", "Module B exported value foo");
+});
+
+// Test simple circular loading (moduleC-circular.js and moduleD-circular.js require each other)
+add_test(function test_circular() {
+  let C = require(PATH + "moduleC-circular.js");
+  ok(true, "Loaded circular modules C and D");
+  is(
+    C.copiedFromD.copiedFromC.enteredC,
+    true,
+    "Properties exported by C before requiring D can be seen by D immediately"
+  );
+
+  let D = require(PATH + "moduleD-circular.js");
+  is(
+    D.exportedFromC.finishedC,
+    true,
+    "Properties exported by C after requiring D can be seen by D eventually"
+  );
+});
+
+// Testing error cases
+add_test(function test_exceptions() {
+  let should_throw = function (f) {
+    try {
+      f();
+      return null;
+    } catch (ex) {
+      return ex;
+    }
+  };
+
+  let exn = should_throw(() => require(PATH + "this module doesn't exist"));
+  ok(!!exn, "Attempting to load a module that doesn't exist raises an error");
+
+  exn = should_throw(() => require(PATH + "moduleE-throws-during-require.js"));
+  ok(
+    !!exn,
+    "Attempting to load a module that throws at toplevel raises an error"
+  );
+  is(
+    exn.moduleName,
+    PATH + "moduleE-throws-during-require.js",
+    "moduleName is correct"
+  );
+  isnot(
+    exn.moduleStack.indexOf("moduleE-throws-during-require.js"),
+    -1,
+    "moduleStack contains the name of the module"
+  );
+  is(exn.lineNumber, 12, "The error comes with the right line number");
+
+  exn = should_throw(() => require(PATH + "moduleF-syntaxerror.xml"));
+  ok(!!exn, "Attempting to load a non-well formatted module raises an error");
+
+  exn = should_throw(() => require(PATH + "moduleG-throws-later.js").doThrow());
+  ok(!!exn, "G.doThrow() has raised an error");
+  info(exn);
+  ok(exn.toString().startsWith("TypeError"), "The exception is a TypeError.");
+  is(
+    exn.moduleName,
+    PATH + "moduleG-throws-later.js",
+    "The name of the module is correct"
+  );
+  isnot(
+    exn.moduleStack.indexOf("moduleG-throws-later.js"),
+    -1,
+    "The name of the right file appears somewhere in the stack"
+  );
+  is(exn.lineNumber, 13, "The error comes with the right line number");
+});
+
+function get_exn(f) {
+  try {
+    f();
+    return undefined;
+  } catch (ex) {
+    return ex;
+  }
+}
+
+// Test module.exports
+add_test(function test_module_dot_exports() {
+  let H = require(PATH + "moduleH-module-dot-exports.js");
+  is(H.key, "value", "module.exports worked");
+  let H2 = require(PATH + "moduleH-module-dot-exports.js");
+  is(H2.key, "value", "module.exports returned the same key");
+  ok(H2 === H, "module.exports returned the same module the second time");
+  let exn = get_exn(() => (H.key = "this should not be accepted"));
+  ok(
+    exn instanceof TypeError,
+    "Cannot alter value in module.exports after export"
+  );
+  exn = get_exn(() => (H.key2 = "this should not be accepted, either"));
+  ok(
+    exn instanceof TypeError,
+    "Cannot add value to module.exports after export"
+  );
+});
+
+// Test relative imports (moduleI-depends.js requires moduleJ-dependency.js)
+add_test(function test_load() {
+  let I = require(PATH + "moduleI-depends.js");
+  ok(true, "Opened module I");
+
+  is(I.I, true, "Module I exported value I");
+  ok(!("J" in I), "Module I did not export value J");
+  is(I.importedFoo, "foo", "Module I re-exported J.foo");
+
+  // re-evaluating moduleJ-dependency.js would cause an error, but re-requiring it shouldn't
+  let J = require(PATH + "moduleJ-dependency.js");
+  ok(true, "Managed to re-require module J");
+  is(J.J, true, "Module J exported value J");
+  is(J.foo, "foo", "Module J exported value foo");
+});
+
+self.onmessage = function (message) {
+  for (let test of tests) {
+    info("Entering " + test.name);
+    try {
+      test();
+    } catch (ex) {
+      ok(false, "Test " + test.name + " failed");
+      info(ex);
+      info(ex.stack);
+    }
+    info("Leaving " + test.name);
+  }
+  finish();
+};