1 files changed, 100 insertions, 0 deletions
diff --git a/devtools/shared/tests/xpcshell/test_require.js b/devtools/shared/tests/xpcshell/test_require.js
new file mode 100644
index 0000000000..b94aca23e7
--- /dev/null
+++ b/devtools/shared/tests/xpcshell/test_require.js
@@ -0,0 +1,100 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test require
+
+// Ensure that DevtoolsLoader.require doesn't spawn multiple
+// loader/modules when early cached
+function testBug1091706() {
+  const loader = new DevToolsLoader();
+  const require = loader.require;
+
+  const indent1 = require("resource://devtools/shared/indentation.js");
+  const indent2 = require("resource://devtools/shared/indentation.js");
+
+  Assert.ok(indent1 === indent2);
+}
+
+function testInvalidModule() {
+  const loader = new DevToolsLoader();
+  const require = loader.require;
+
+  try {
+    // This will result in an invalid URL with no scheme and mae loadSubScript
+    // throws "Error creating URI" error
+    require("foo");
+    Assert.ok(false, "require should throw");
+  } catch (error) {
+    Assert.equal(error.message, "Module `foo` is not found at foo.js");
+    Assert.ok(
+      error.stack.includes("testInvalidModule"),
+      "Exception's stack includes the test function"
+    );
+  }
+
+  try {
+    // But when using devtools prefix, the URL is going to be correct but the file
+    // doesn't exists, leading to "Error opening input stream (invalid filename?)" error
+    require("resource://devtools/foo.js");
+    Assert.ok(false, "require should throw");
+  } catch (error) {
+    Assert.equal(
+      error.message,
+      "Module `resource://devtools/foo.js` is not found at resource://devtools/foo.js"
+    );
+    Assert.ok(
+      error.stack.includes("testInvalidModule"),
+      "Exception's stack includes the test function"
+    );
+  }
+}
+
+function testThrowingModule() {
+  const loader = new DevToolsLoader();
+  const require = loader.require;
+
+  try {
+    // Require a test module that is throwing an Error object
+    require("xpcshell-test/throwing-module-1.js");
+    Assert.ok(false, "require should throw");
+  } catch (error) {
+    Assert.equal(error.message, "my-exception");
+    Assert.ok(
+      error.stack.includes("testThrowingModule"),
+      "Exception's stack includes the test function"
+    );
+    Assert.ok(
+      error.stack.includes("throwingMethod"),
+      "Exception's stack also includes the module function that throws"
+    );
+  }
+  try {
+    // Require a test module that is throwing a string
+    require("xpcshell-test/throwing-module-2.js");
+    Assert.ok(false, "require should throw");
+  } catch (error) {
+    Assert.equal(
+      error.message,
+      "Error while loading module `xpcshell-test/throwing-module-2.js` at " +
+        "resource://test/throwing-module-2.js:\nmy-exception"
+    );
+    Assert.ok(
+      error.stack.includes("testThrowingModule"),
+      "Exception's stack includes the test function"
+    );
+    Assert.ok(
+      !error.stack.includes("throwingMethod"),
+      "Exception's stack also includes the module function that throws"
+    );
+  }
+}
+
+function run_test() {
+  testBug1091706();
+
+  testInvalidModule();
+
+  testThrowingModule();
+}