5 files changed, 150 insertions, 0 deletions
diff --git a/devtools/platform/tests/xpcshell/.eslintrc.js b/devtools/platform/tests/xpcshell/.eslintrc.js
new file mode 100644
index 0000000000..dc7f2c85c4
--- /dev/null
+++ b/devtools/platform/tests/xpcshell/.eslintrc.js
@@ -0,0 +1,19 @@
+"use strict";
+
+// Parent config file for all devtools xpcshell files.
+module.exports = {
+  extends: ["plugin:mozilla/xpcshell-test"],
+  rules: {
+    // Allow non-camelcase so that run_test doesn't produce a warning.
+    camelcase: "off",
+    // Allow using undefined variables so that tests can refer to functions
+    // and variables defined in head.js files, without having to maintain a
+    // list of globals in each .eslintrc file.
+    // Note that bug 1168340 will eventually help auto-registering globals
+    // from head.js files.
+    "no-undef": "off",
+    "block-scoped-var": "off",
+    // Tests can always import anything.
+    "mozilla/reject-some-requires": "off",
+  },
+};
diff --git a/devtools/platform/tests/xpcshell/head_dbg.js b/devtools/platform/tests/xpcshell/head_dbg.js
new file mode 100644
index 0000000000..48942bdb7a
--- /dev/null
+++ b/devtools/platform/tests/xpcshell/head_dbg.js
@@ -0,0 +1,14 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+function testGlobal(name) {
+  const systemPrincipal = Cc["@mozilla.org/systemprincipal;1"].createInstance(
+    Ci.nsIPrincipal
+  );
+
+  const sandbox = Cu.Sandbox(systemPrincipal);
+  Cu.evalInSandbox("this.__name = '" + name + "'", sandbox);
+  return sandbox;
+}
diff --git a/devtools/platform/tests/xpcshell/test_nativewrappers.js b/devtools/platform/tests/xpcshell/test_nativewrappers.js
new file mode 100644
index 0000000000..a7ea81adaf
--- /dev/null
+++ b/devtools/platform/tests/xpcshell/test_nativewrappers.js
@@ -0,0 +1,45 @@
+"use strict";
+
+function run_test() {
+  const { addDebuggerToGlobal } = ChromeUtils.importESModule(
+    "resource://gre/modules/jsdebugger.sys.mjs"
+  );
+
+  Services.prefs.setBoolPref("security.allow_eval_with_system_principal", true);
+  registerCleanupFunction(() => {
+    Services.prefs.clearUserPref("security.allow_eval_with_system_principal");
+  });
+
+  addDebuggerToGlobal(globalThis);
+  const g = testGlobal("test1");
+
+  const dbg = new Debugger();
+  dbg.addDebuggee(g);
+  dbg.onDebuggerStatement = function (frame) {
+    const args = frame.arguments;
+    try {
+      args[0];
+      Assert.ok(true);
+    } catch (ex) {
+      Assert.ok(false);
+    }
+  };
+
+  g.eval("function stopMe(arg) {debugger;}");
+
+  const g2 = testGlobal("test2");
+  g2.g = g;
+  g2.eval(
+    "(" +
+      function createBadEvent() {
+        // eslint-disable-next-line mozilla/reject-importGlobalProperties
+        Cu.importGlobalProperties(["DOMParser"]);
+        const parser = new DOMParser();
+        const doc = parser.parseFromString("<foo></foo>", "text/xml");
+        g.stopMe(doc.createEvent("MouseEvent"));
+      } +
+      ")()"
+  );
+
+  dbg.removeAllDebuggees();
+}
diff --git a/devtools/platform/tests/xpcshell/test_nsjsinspector.js b/devtools/platform/tests/xpcshell/test_nsjsinspector.js
new file mode 100644
index 0000000000..74d18b7689
--- /dev/null
+++ b/devtools/platform/tests/xpcshell/test_nsjsinspector.js
@@ -0,0 +1,65 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test the basic functionality of the nsIJSInspector component.
+var gCount = 0;
+const MAX = 10;
+
+var inspector = Cc["@mozilla.org/jsinspector;1"].getService(Ci.nsIJSInspector);
+
+// Emulate 10 simultaneously-debugged windows from 3 separate client connections.
+var requestor = count => ({
+  url: "http://foo/bar/" + count,
+  connection: "conn" + (count % 3),
+});
+
+function run_test() {
+  test_nesting();
+}
+
+function test_nesting() {
+  Assert.equal(inspector.eventLoopNestLevel, 0);
+
+  Services.tm.dispatchToMainThread({ run: enterEventLoop });
+
+  Assert.equal(inspector.enterNestedEventLoop(requestor(gCount)), 0);
+  Assert.equal(inspector.eventLoopNestLevel, 0);
+  Assert.equal(inspector.lastNestRequestor, null);
+}
+
+function enterEventLoop() {
+  if (gCount++ < MAX) {
+    Services.tm.dispatchToMainThread({ run: enterEventLoop });
+
+    Object.create(requestor(gCount));
+
+    Assert.equal(inspector.eventLoopNestLevel, gCount);
+    Assert.equal(inspector.lastNestRequestor.url, requestor(gCount - 1).url);
+    Assert.equal(
+      inspector.lastNestRequestor.connection,
+      requestor(gCount - 1).connection
+    );
+    Assert.equal(inspector.enterNestedEventLoop(requestor(gCount)), gCount);
+  } else {
+    Assert.equal(gCount, MAX + 1);
+    Services.tm.dispatchToMainThread({ run: exitEventLoop });
+  }
+}
+
+function exitEventLoop() {
+  if (inspector.lastNestRequestor != null) {
+    Assert.equal(inspector.lastNestRequestor.url, requestor(gCount - 1).url);
+    Assert.equal(
+      inspector.lastNestRequestor.connection,
+      requestor(gCount - 1).connection
+    );
+    if (gCount-- > 1) {
+      Services.tm.dispatchToMainThread({ run: exitEventLoop });
+    }
+
+    Assert.equal(inspector.exitNestedEventLoop(), gCount);
+    Assert.equal(inspector.eventLoopNestLevel, gCount);
+  }
+}
diff --git a/devtools/platform/tests/xpcshell/xpcshell.toml b/devtools/platform/tests/xpcshell/xpcshell.toml
new file mode 100644
index 0000000000..ede5c03e2b
--- /dev/null
+++ b/devtools/platform/tests/xpcshell/xpcshell.toml
@@ -0,0 +1,7 @@
+[DEFAULT]
+tags = "devtools"
+head = "head_dbg.js"
+
+["test_nativewrappers.js"]
+
+["test_nsjsinspector.js"]