Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

15 files changed, 1174 insertions, 0 deletions

diff --git a/js/xpconnect/tests/components/js/xpctest.manifest b/js/xpconnect/tests/components/js/xpctest.manifest
new file mode 100644
index 0000000000..c9a2059ab8
--- /dev/null
+++ b/js/xpconnect/tests/components/js/xpctest.manifest
@@ -0,0 +1,29 @@
+component {8ff41d9c-66e9-4453-924a-7d8de0a5e966} xpctest_attributes.js
+contract @mozilla.org/js/xpc/test/js/ObjectReadWrite;1 {8ff41d9c-66e9-4453-924a-7d8de0a5e966}
+
+component {916c4247-253d-4ed0-a425-adfedf53ecc8} xpctest_attributes.js
+contract @mozilla.org/js/xpc/test/js/ObjectReadOnly;1 {916c4247-253d-4ed0-a425-adfedf53ecc8}
+
+component {2df46559-da21-49bf-b863-0d7b7bbcbc73} xpctest_bug809674.js
+contract @mozilla.org/js/xpc/test/js/Bug809674;1 {2df46559-da21-49bf-b863-0d7b7bbcbc73}
+
+component {e3b86f4e-49c0-487c-a2b0-3a986720a044} xpctest_params.js
+contract @mozilla.org/js/xpc/test/js/Params;1 {e3b86f4e-49c0-487c-a2b0-3a986720a044}
+
+component {3c8fd2f5-970c-42c6-b5dd-cda1c16dcfd8} xpctest_interfaces.js
+contract @mozilla.org/js/xpc/test/js/InterfaceA;1 {3c8fd2f5-970c-42c6-b5dd-cda1c16dcfd8}
+
+component {ff528c3a-2410-46de-acaa-449aa6403a33} xpctest_interfaces.js
+contract @mozilla.org/js/xpc/test/js/InterfaceB;1 {ff528c3a-2410-46de-acaa-449aa6403a33}
+
+component {90ec5c9e-f6da-406b-9a38-14d00f59db76} xpctest_interfaces.js
+contract @mozilla.org/js/xpc/test/js/TestInterfaceAll;1 {90ec5c9e-f6da-406b-9a38-14d00f59db76}
+
+component {38dd78aa-467f-4fad-8dcf-4383a743e235} xpctest_returncode_child.js
+contract @mozilla.org/js/xpc/test/js/ReturnCodeChild;1 {38dd78aa-467f-4fad-8dcf-4383a743e235}
+
+component {e86573c4-a384-441a-8c92-7b99e8575b28} xpctest_utils.js
+contract @mozilla.org/js/xpc/test/js/TestUtils;1 {e86573c4-a384-441a-8c92-7b99e8575b28}
+
+component {43929c74-dc70-11e8-b6f9-8fce71a2796a} xpctest_cenums.js
+contract @mozilla.org/js/xpc/test/js/CEnums;1 {43929c74-dc70-11e8-b6f9-8fce71a2796a}
diff --git a/js/xpconnect/tests/components/js/xpctest_attributes.js b/js/xpconnect/tests/components/js/xpctest_attributes.js
new file mode 100644
index 0000000000..4cd5536830
--- /dev/null
+++ b/js/xpconnect/tests/components/js/xpctest_attributes.js
@@ -0,0 +1,48 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+const {ComponentUtils} = ChromeUtils.import("resource://gre/modules/ComponentUtils.jsm");
+
+function TestObjectReadWrite() {}
+TestObjectReadWrite.prototype = {
+
+  /* Boilerplate */
+  QueryInterface: ChromeUtils.generateQI(["nsIXPCTestObjectReadWrite"]),
+  contractID: "@mozilla.org/js/xpc/test/js/ObjectReadWrite;1",
+  classID: Components.ID("{8ff41d9c-66e9-4453-924a-7d8de0a5e966}"),
+
+  /* nsIXPCTestObjectReadWrite */
+  stringProperty: "XPConnect Read-Writable String",
+  booleanProperty: true,
+  shortProperty: 32767,
+  longProperty: 2147483647,
+  floatProperty: 5.5,
+  charProperty: "X",
+  // timeProperty is PRTime and signed type.
+  // So it has to allow negative value.
+  timeProperty: -1
+};
+
+
+function TestObjectReadOnly() {}
+TestObjectReadOnly.prototype = {
+
+  /* Boilerplate */
+  QueryInterface: ChromeUtils.generateQI(["nsIXPCTestObjectReadOnly"]),
+  contractID: "@mozilla.org/js/xpc/test/js/ObjectReadOnly;1",
+  classID: Components.ID("{916c4247-253d-4ed0-a425-adfedf53ecc8}"),
+
+  /* nsIXPCTestObjectReadOnly */
+  strReadOnly: "XPConnect Read-Only String",
+  boolReadOnly: true,
+  shortReadOnly: 32767,
+  longReadOnly: 2147483647,
+  floatReadOnly: 5.5,
+  charReadOnly: "X",
+  // timeProperty is PRTime and signed type.
+  // So it has to allow negative value.
+  timeReadOnly: -1
+};
+
+
+this.NSGetFactory = ComponentUtils.generateNSGetFactory([TestObjectReadWrite, TestObjectReadOnly]);
diff --git a/js/xpconnect/tests/components/js/xpctest_bug809674.js b/js/xpconnect/tests/components/js/xpctest_bug809674.js
new file mode 100644
index 0000000000..102c0c1d38
--- /dev/null
+++ b/js/xpconnect/tests/components/js/xpctest_bug809674.js
@@ -0,0 +1,42 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+const {ComponentUtils} = ChromeUtils.import("resource://gre/modules/ComponentUtils.jsm");
+
+function TestBug809674() {}
+TestBug809674.prototype = {
+
+  /* Boilerplate */
+  QueryInterface: ChromeUtils.generateQI(["nsIXPCTestBug809674"]),
+  contractID: "@mozilla.org/js/xpc/test/js/Bug809674;1",
+  classID: Components.ID("{2df46559-da21-49bf-b863-0d7b7bbcbc73}"),
+
+  /* nsIXPCTestBug809674 */
+  methodWithOptionalArgc() {},
+
+  addArgs(x, y) {
+    return x + y;
+  },
+  addSubMulArgs(x, y, subOut, mulOut) {
+    subOut.value = x - y;
+    mulOut.value = x * y;
+    return x + y;
+  },
+  addVals(x, y) {
+    return x + y;
+  },
+  addMany(x1, x2, x3, x4, x5, x6, x7, x8) {
+    return x1 + x2 + x3 + x4 + x5 + x6 + x7 + x8;
+  },
+
+  methodNoArgs() {
+    return 7;
+  },
+  methodNoArgsNoRetVal() {},
+
+  valProperty: {value: 42},
+  uintProperty: 123,
+};
+
+
+this.NSGetFactory = ComponentUtils.generateNSGetFactory([TestBug809674]);
diff --git a/js/xpconnect/tests/components/js/xpctest_cenums.js b/js/xpconnect/tests/components/js/xpctest_cenums.js
new file mode 100644
index 0000000000..ba9c5de0d3
--- /dev/null
+++ b/js/xpconnect/tests/components/js/xpctest_cenums.js
@@ -0,0 +1,27 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+const {ComponentUtils} = ChromeUtils.import("resource://gre/modules/ComponentUtils.jsm");
+
+function TestCEnums() {
+}
+
+TestCEnums.prototype = {
+  /* Boilerplate */
+  QueryInterface: ChromeUtils.generateQI(["nsIXPCTestCEnums"]),
+  contractID: "@mozilla.org/js/xpc/test/js/CEnums;1",
+  classID: Components.ID("{43929c74-dc70-11e8-b6f9-8fce71a2796a}"),
+
+  testCEnumInput: function(input) {
+    if (input != Ci.nsIXPCTestCEnums.shouldBe12Explicit)
+    {
+      throw new Error("Enum values do not match expected value");
+    }
+  },
+
+  testCEnumOutput: function() {
+    return Ci.nsIXPCTestCEnums.shouldBe8Explicit;
+  },
+};
+
+this.NSGetFactory = ComponentUtils.generateNSGetFactory([TestCEnums]);
diff --git a/js/xpconnect/tests/components/js/xpctest_interfaces.js b/js/xpconnect/tests/components/js/xpctest_interfaces.js
new file mode 100644
index 0000000000..12da40af81
--- /dev/null
+++ b/js/xpconnect/tests/components/js/xpctest_interfaces.js
@@ -0,0 +1,48 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+const {ComponentUtils} = ChromeUtils.import("resource://gre/modules/ComponentUtils.jsm");
+
+function TestInterfaceA() {}
+TestInterfaceA.prototype = {
+
+  /* Boilerplate */
+  QueryInterface: ChromeUtils.generateQI(["nsIXPCTestInterfaceA"]),
+  contractID: "@mozilla.org/js/xpc/test/js/TestInterfaceA;1",
+  classID: Components.ID("{3c8fd2f5-970c-42c6-b5dd-cda1c16dcfd8}"),
+
+  /* nsIXPCTestInterfaceA */
+  name: "TestInterfaceADefaultName"
+};
+
+function TestInterfaceB() {}
+TestInterfaceB.prototype = {
+
+  /* Boilerplate */
+  QueryInterface: ChromeUtils.generateQI(["nsIXPCTestInterfaceB"]),
+  contractID: "@mozilla.org/js/xpc/test/js/TestInterfaceB;1",
+  classID: Components.ID("{ff528c3a-2410-46de-acaa-449aa6403a33}"),
+
+  /* nsIXPCTestInterfaceA */
+  name: "TestInterfaceADefaultName"
+};
+
+function TestInterfaceAll() {}
+TestInterfaceAll.prototype = {
+
+  /* Boilerplate */
+  QueryInterface: ChromeUtils.generateQI(["nsIXPCTestInterfaceA",
+                                          "nsIXPCTestInterfaceB",
+                                          "nsIXPCTestInterfaceC"]),
+  contractID: "@mozilla.org/js/xpc/test/js/TestInterfaceAll;1",
+  classID: Components.ID("{90ec5c9e-f6da-406b-9a38-14d00f59db76}"),
+
+  /* nsIXPCTestInterfaceA / nsIXPCTestInterfaceB */
+  name: "TestInterfaceAllDefaultName",
+
+  /* nsIXPCTestInterfaceC */
+  someInteger: 42
+};
+
+var NSGetFactory = ComponentUtils.generateNSGetFactory([TestInterfaceA, TestInterfaceB, TestInterfaceAll]);
+
diff --git a/js/xpconnect/tests/components/js/xpctest_params.js b/js/xpconnect/tests/components/js/xpctest_params.js
new file mode 100644
index 0000000000..8e2c959d78
--- /dev/null
+++ b/js/xpconnect/tests/components/js/xpctest_params.js
@@ -0,0 +1,104 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+const {ComponentUtils} = ChromeUtils.import("resource://gre/modules/ComponentUtils.jsm");
+
+function TestParams() {
+}
+
+/* For once I'm happy that JS is weakly typed. */
+function f(a, b) {
+    var rv = b.value;
+    b.value = a;
+    return rv;
+};
+
+/* Implementation for size_is and iid_is methods. */
+function f_is(aIs, a, bIs, b, rvIs) {
+
+    // Set up the return value and its 'is' parameter.
+    var rv = b.value;
+    rvIs.value = bIs.value;
+
+    // Set up b and its 'is' parameter.
+    b.value = a;
+    bIs.value = aIs;
+
+    return rv;
+}
+
+function f_size_and_iid(aSize, aIID, a, bSize, bIID, b, rvSize, rvIID) {
+
+    // Copy the iids.
+    rvIID.value = bIID.value;
+    bIID.value = aIID;
+
+    // Now that we've reduced the problem to one dependent variable, use f_is.
+    return f_is(aSize, a, bSize, b, rvSize);
+}
+
+TestParams.prototype = {
+
+  /* Boilerplate */
+  QueryInterface: ChromeUtils.generateQI(["nsIXPCTestParams"]),
+  contractID: "@mozilla.org/js/xpc/test/js/Params;1",
+  classID: Components.ID("{e3b86f4e-49c0-487c-a2b0-3a986720a044}"),
+
+  /* nsIXPCTestParams */
+  testBoolean: f,
+  testOctet: f,
+  testShort: f,
+  testLong: f,
+  testLongLong: f,
+  testUnsignedShort: f,
+  testUnsignedLong: f,
+  testUnsignedLongLong: f,
+  testFloat: f,
+  testDouble: f,
+  testChar: f,
+  testString: f,
+  testWchar: f,
+  testWstring: f,
+  testAString: f,
+  testAUTF8String: f,
+  testACString: f,
+  testJsval: f,
+  testShortSequence: f,
+  testDoubleSequence: f,
+  testAStringSequence: f,
+  testACStringSequence: f,
+  testInterfaceSequence: f,
+  testJsvalSequence: f,
+  testInterfaceIsSequence: f_is,
+  testOptionalSequence: function (arr) { return arr; },
+  testShortArray: f_is,
+  testDoubleArray: f_is,
+  testStringArray: f_is,
+  testWstringArray: f_is,
+  testInterfaceArray: f_is,
+  testJsvalArray: f_is,
+  testSizedString: f_is,
+  testSizedWstring: f_is,
+  testInterfaceIs: f_is,
+  testInterfaceIsArray: f_size_and_iid,
+  testOutAString: function(o) { o.value = "out"; },
+  testStringArrayOptionalSize: function(arr, size) {
+    if (arr.length != size) { throw "bad size passed to test method"; }
+    var rv = "";
+    arr.forEach((x) => rv += x);
+    return rv;
+  },
+  testOmittedOptionalOut(o) {
+    if (typeof o != "object" || o.value !== undefined) {
+      throw new Components.Exception(
+        "unexpected value",
+        Cr.NS_ERROR_ILLEGAL_VALUE
+      );
+    }
+    o.value = Cc["@mozilla.org/network/io-service;1"]
+      .getService(Ci.nsIIOService)
+      .newURI("http://example.com/");
+  }
+};
+
+this.NSGetFactory = ComponentUtils.generateNSGetFactory([TestParams]);
diff --git a/js/xpconnect/tests/components/js/xpctest_returncode_child.js b/js/xpconnect/tests/components/js/xpctest_returncode_child.js
new file mode 100644
index 0000000000..bbd024ebb2
--- /dev/null
+++ b/js/xpconnect/tests/components/js/xpctest_returncode_child.js
@@ -0,0 +1,48 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+const {ComponentUtils} = ChromeUtils.import("resource://gre/modules/ComponentUtils.jsm");
+
+function TestReturnCodeChild() {}
+TestReturnCodeChild.prototype = {
+
+  /* Boilerplate */
+  QueryInterface: ChromeUtils.generateQI(["nsIXPCTestReturnCodeChild"]),
+  contractID: "@mozilla.org/js/xpc/test/js/ReturnCodeChild;1",
+  classID: Components.ID("{38dd78aa-467f-4fad-8dcf-4383a743e235}"),
+
+  doIt(behaviour) {
+    switch (behaviour) {
+      case Ci.nsIXPCTestReturnCodeChild.CHILD_SHOULD_THROW:
+        throw(new Error("a requested error"));
+      case Ci.nsIXPCTestReturnCodeChild.CHILD_SHOULD_RETURN_SUCCESS:
+        return;
+      case Ci.nsIXPCTestReturnCodeChild.CHILD_SHOULD_RETURN_RESULTCODE:
+        Components.returnCode = Cr.NS_ERROR_FAILURE;
+        return;
+      case Ci.nsIXPCTestReturnCodeChild.CHILD_SHOULD_NEST_RESULTCODES:
+        // Use xpconnect to create another instance of *this* component and
+        // call that.  This way we have crossed the xpconnect bridge twice.
+
+        // We set *our* return code early - this should be what is returned
+        // to our caller, even though our "inner" component will set it to
+        // a different value that we will see (but our caller should not)
+        Components.returnCode = Cr.NS_ERROR_UNEXPECTED;
+        // call the child asking it to do the .returnCode set.
+        let sub = Cc[this.contractID].createInstance(Ci.nsIXPCTestReturnCodeChild);
+        let childResult = Cr.NS_OK;
+        try {
+          sub.doIt(Ci.nsIXPCTestReturnCodeChild.CHILD_SHOULD_RETURN_RESULTCODE);
+        } catch (ex) {
+          childResult = ex.result;
+        }
+        // write it to the console so the test can check it.
+        let consoleService = Cc["@mozilla.org/consoleservice;1"]
+                             .getService(Ci.nsIConsoleService);
+        consoleService.logStringMessage("nested child returned " + childResult);
+        return;
+    }
+  }
+};
+
+this.NSGetFactory = ComponentUtils.generateNSGetFactory([TestReturnCodeChild]);
diff --git a/js/xpconnect/tests/components/js/xpctest_utils.js b/js/xpconnect/tests/components/js/xpctest_utils.js
new file mode 100644
index 0000000000..25e548ba69
--- /dev/null
+++ b/js/xpconnect/tests/components/js/xpctest_utils.js
@@ -0,0 +1,17 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const {ComponentUtils} = ChromeUtils.import("resource://gre/modules/ComponentUtils.jsm");
+
+function TestUtils() {}
+TestUtils.prototype = {
+
+  /* Boilerplate */
+  QueryInterface: ChromeUtils.generateQI(["nsIXPCTestUtils"]),
+  contractID: "@mozilla.org/js/xpc/test/js/TestUtils;1",
+  classID: Components.ID("{e86573c4-a384-441a-8c92-7b99e8575b28}"),
+  doubleWrapFunction(fun) { return fun }
+};
+
+this.NSGetFactory = ComponentUtils.generateNSGetFactory([TestUtils]);
diff --git a/js/xpconnect/tests/components/native/moz.build b/js/xpconnect/tests/components/native/moz.build
new file mode 100644
index 0000000000..bda655aeb3
--- /dev/null
+++ b/js/xpconnect/tests/components/native/moz.build
@@ -0,0 +1,19 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+EXPORTS += [
+    "xpctest_private.h",
+]
+
+UNIFIED_SOURCES += [
+    "xpctest_attributes.cpp",
+    "xpctest_cenums.cpp",
+    "xpctest_module.cpp",
+    "xpctest_params.cpp",
+    "xpctest_returncode.cpp",
+]
+
+FINAL_LIBRARY = "xul"
diff --git a/js/xpconnect/tests/components/native/xpctest_attributes.cpp b/js/xpconnect/tests/components/native/xpctest_attributes.cpp
new file mode 100644
index 0000000000..180c1f7606
--- /dev/null
+++ b/js/xpconnect/tests/components/native/xpctest_attributes.cpp
@@ -0,0 +1,136 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xpctest_private.h"
+
+NS_IMPL_ISUPPORTS(xpcTestObjectReadOnly, nsIXPCTestObjectReadOnly)
+
+xpcTestObjectReadOnly ::xpcTestObjectReadOnly() {
+  boolProperty = true;
+  shortProperty = 32767;
+  longProperty = 2147483647;
+  floatProperty = 5.5f;
+  charProperty = 'X';
+  // timeProperty is PRTime and signed type.
+  // So it has to allow negative value.
+  timeProperty = -1;
+}
+
+NS_IMETHODIMP xpcTestObjectReadOnly ::GetStrReadOnly(char** aStrReadOnly) {
+  if (!aStrReadOnly) return NS_ERROR_NULL_POINTER;
+  *aStrReadOnly = moz_xstrdup("XPConnect Read-Only String");
+  return NS_OK;
+}
+
+NS_IMETHODIMP xpcTestObjectReadOnly ::GetBoolReadOnly(bool* aBoolReadOnly) {
+  *aBoolReadOnly = boolProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadOnly ::GetShortReadOnly(
+    int16_t* aShortReadOnly) {
+  *aShortReadOnly = shortProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadOnly ::GetLongReadOnly(int32_t* aLongReadOnly) {
+  *aLongReadOnly = longProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadOnly ::GetFloatReadOnly(float* aFloatReadOnly) {
+  *aFloatReadOnly = floatProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadOnly ::GetCharReadOnly(char* aCharReadOnly) {
+  *aCharReadOnly = charProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadOnly ::GetTimeReadOnly(PRTime* aTimeReadOnly) {
+  *aTimeReadOnly = timeProperty;
+  return NS_OK;
+}
+
+NS_IMPL_ISUPPORTS(xpcTestObjectReadWrite, nsIXPCTestObjectReadWrite)
+
+xpcTestObjectReadWrite ::xpcTestObjectReadWrite() {
+  stringProperty = moz_xstrdup("XPConnect Read-Writable String");
+  boolProperty = true;
+  shortProperty = 32767;
+  longProperty = 2147483647;
+  floatProperty = 5.5f;
+  charProperty = 'X';
+  // timeProperty is PRTime and signed type.
+  // So it has to allow negative value.
+  timeProperty = -1;
+}
+
+xpcTestObjectReadWrite ::~xpcTestObjectReadWrite() { free(stringProperty); }
+
+NS_IMETHODIMP xpcTestObjectReadWrite ::GetStringProperty(
+    char** aStringProperty) {
+  if (!aStringProperty) {
+    return NS_ERROR_NULL_POINTER;
+  }
+  *aStringProperty = moz_xstrdup(stringProperty);
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadWrite ::SetStringProperty(
+    const char* aStringProperty) {
+  free(stringProperty);
+  stringProperty = moz_xstrdup(aStringProperty);
+  return NS_OK;
+}
+
+NS_IMETHODIMP xpcTestObjectReadWrite ::GetBooleanProperty(
+    bool* aBooleanProperty) {
+  *aBooleanProperty = boolProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadWrite ::SetBooleanProperty(
+    bool aBooleanProperty) {
+  boolProperty = aBooleanProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadWrite ::GetShortProperty(
+    int16_t* aShortProperty) {
+  *aShortProperty = shortProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadWrite ::SetShortProperty(
+    int16_t aShortProperty) {
+  shortProperty = aShortProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadWrite ::GetLongProperty(int32_t* aLongProperty) {
+  *aLongProperty = longProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadWrite ::SetLongProperty(int32_t aLongProperty) {
+  longProperty = aLongProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadWrite ::GetFloatProperty(float* aFloatProperty) {
+  *aFloatProperty = floatProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadWrite ::SetFloatProperty(float aFloatProperty) {
+  floatProperty = aFloatProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadWrite ::GetCharProperty(char* aCharProperty) {
+  *aCharProperty = charProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadWrite ::SetCharProperty(char aCharProperty) {
+  charProperty = aCharProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadWrite ::GetTimeProperty(PRTime* aTimeProperty) {
+  *aTimeProperty = timeProperty;
+  return NS_OK;
+}
+NS_IMETHODIMP xpcTestObjectReadWrite ::SetTimeProperty(PRTime aTimeProperty) {
+  timeProperty = aTimeProperty;
+  return NS_OK;
+}
diff --git a/js/xpconnect/tests/components/native/xpctest_cenums.cpp b/js/xpconnect/tests/components/native/xpctest_cenums.cpp
new file mode 100644
index 0000000000..ae72351b77
--- /dev/null
+++ b/js/xpconnect/tests/components/native/xpctest_cenums.cpp
@@ -0,0 +1,67 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* local header for xpconnect tests components */
+
+#include "xpctest_private.h"
+
+NS_IMPL_ISUPPORTS(xpcTestCEnums, nsIXPCTestCEnums)
+
+// If this compiles, we pass. Otherwise, this means that XPIDL bitflag
+// generation is broken.
+xpcTestCEnums::xpcTestCEnums() {
+  static_assert(
+      0 == static_cast<uint32_t>(shouldBe0Implicit),
+      "XPIDL bitflag generation did not create correct shouldBe0Implicit flag");
+  static_assert(
+      1 == static_cast<uint32_t>(shouldBe1Implicit),
+      "XPIDL bitflag generation did not create correct shouldBe1Implicit flag");
+  static_assert(
+      2 == static_cast<uint32_t>(shouldBe2Implicit),
+      "XPIDL bitflag generation did not create correct shouldBe2Implicit flag");
+  static_assert(
+      3 == static_cast<uint32_t>(shouldBe3Implicit),
+      "XPIDL bitflag generation did not create correct shouldBe3Implicit flag");
+  static_assert(
+      5 == static_cast<uint32_t>(shouldBe5Implicit),
+      "XPIDL bitflag generation did not create correct shouldBe5Implicit flag");
+  static_assert(
+      6 == static_cast<uint32_t>(shouldBe6Implicit),
+      "XPIDL bitflag generation did not create correct shouldBe6Implicit flag");
+  static_assert(2 == static_cast<uint32_t>(shouldBe2AgainImplicit),
+                "XPIDL bitflag generation did not create correct "
+                "shouldBe2AgainImplicit flag");
+  static_assert(3 == static_cast<uint32_t>(shouldBe3AgainImplicit),
+                "XPIDL bitflag generation did not create correct "
+                "shouldBe3AgainImplicit flag");
+  static_assert(
+      1 == static_cast<uint32_t>(shouldBe1Explicit),
+      "XPIDL bitflag generation did not create correct shouldBe1Explicit flag");
+  static_assert(
+      2 == static_cast<uint32_t>(shouldBe2Explicit),
+      "XPIDL bitflag generation did not create correct shouldBe2Explicit flag");
+  static_assert(
+      4 == static_cast<uint32_t>(shouldBe4Explicit),
+      "XPIDL bitflag generation did not create correct shouldBe4Explicit flag");
+  static_assert(
+      8 == static_cast<uint32_t>(shouldBe8Explicit),
+      "XPIDL bitflag generation did not create correct shouldBe8Explicit flag");
+  static_assert(12 == static_cast<uint32_t>(shouldBe12Explicit),
+                "XPIDL bitflag generation did not create correct "
+                "shouldBe12Explicit flag");
+}
+
+nsresult xpcTestCEnums::TestCEnumInput(testFlagsExplicit a) {
+  if (a != shouldBe12Explicit) {
+    return NS_ERROR_FAILURE;
+  }
+  return NS_OK;
+}
+
+nsresult xpcTestCEnums::TestCEnumOutput(testFlagsExplicit* a) {
+  *a = shouldBe8Explicit;
+  return NS_OK;
+}
diff --git a/js/xpconnect/tests/components/native/xpctest_module.cpp b/js/xpconnect/tests/components/native/xpctest_module.cpp
new file mode 100644
index 0000000000..5fc61631b4
--- /dev/null
+++ b/js/xpconnect/tests/components/native/xpctest_module.cpp
@@ -0,0 +1,80 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* module registration and factory code. */
+
+#include "xpctest_private.h"
+
+#define NS_XPCTESTOBJECTREADONLY_CID                 \
+  {                                                  \
+    0x492609a7, 0x2582, 0x436b, {                    \
+      0xb0, 0xef, 0x92, 0xe2, 0x9b, 0xb9, 0xe1, 0x43 \
+    }                                                \
+  }
+
+#define NS_XPCTESTOBJECTREADWRITE_CID                \
+  {                                                  \
+    0x8f37f760, 0x3686, 0x4dbb, {                    \
+      0xb1, 0x21, 0x96, 0x93, 0xba, 0x81, 0x3f, 0x8f \
+    }                                                \
+  }
+
+#define NS_XPCTESTPARAMS_CID                         \
+  {                                                  \
+    0x1f11076a, 0x0fa2, 0x4f07, {                    \
+      0xb4, 0x7a, 0xa1, 0x54, 0x31, 0xf2, 0xce, 0xf7 \
+    }                                                \
+  }
+
+#define NS_XPCTESTRETURNCODEPARENT_CID               \
+  {                                                  \
+    0x3818f744, 0x5445, 0x4e9c, {                    \
+      0x9b, 0xb8, 0x64, 0x62, 0xfe, 0x81, 0xb6, 0x19 \
+    }                                                \
+  }
+
+#define NS_XPCTESTCENUMS_CID                         \
+  {                                                  \
+    0x89ba673a, 0xa987, 0xb89c, {                    \
+      0x92, 0x02, 0xb9, 0xc6, 0x23, 0x38, 0x64, 0x55 \
+    }                                                \
+  }
+
+NS_GENERIC_FACTORY_CONSTRUCTOR(xpcTestCEnums)
+NS_GENERIC_FACTORY_CONSTRUCTOR(xpcTestObjectReadOnly)
+NS_GENERIC_FACTORY_CONSTRUCTOR(xpcTestObjectReadWrite)
+NS_GENERIC_FACTORY_CONSTRUCTOR(nsXPCTestParams)
+NS_GENERIC_FACTORY_CONSTRUCTOR(nsXPCTestReturnCodeParent)
+NS_DEFINE_NAMED_CID(NS_XPCTESTOBJECTREADONLY_CID);
+NS_DEFINE_NAMED_CID(NS_XPCTESTOBJECTREADWRITE_CID);
+NS_DEFINE_NAMED_CID(NS_XPCTESTPARAMS_CID);
+NS_DEFINE_NAMED_CID(NS_XPCTESTRETURNCODEPARENT_CID);
+NS_DEFINE_NAMED_CID(NS_XPCTESTCENUMS_CID);
+
+static const mozilla::Module::CIDEntry kXPCTestCIDs[] = {
+    {&kNS_XPCTESTOBJECTREADONLY_CID, false, nullptr,
+     xpcTestObjectReadOnlyConstructor},
+    {&kNS_XPCTESTOBJECTREADWRITE_CID, false, nullptr,
+     xpcTestObjectReadWriteConstructor},
+    {&kNS_XPCTESTPARAMS_CID, false, nullptr, nsXPCTestParamsConstructor},
+    {&kNS_XPCTESTRETURNCODEPARENT_CID, false, nullptr,
+     nsXPCTestReturnCodeParentConstructor},
+    {&kNS_XPCTESTCENUMS_CID, false, nullptr, xpcTestCEnumsConstructor},
+    {nullptr}};
+
+static const mozilla::Module::ContractIDEntry kXPCTestContracts[] = {
+    {"@mozilla.org/js/xpc/test/native/CEnums;1", &kNS_XPCTESTCENUMS_CID},
+    {"@mozilla.org/js/xpc/test/native/ObjectReadOnly;1",
+     &kNS_XPCTESTOBJECTREADONLY_CID},
+    {"@mozilla.org/js/xpc/test/native/ObjectReadWrite;1",
+     &kNS_XPCTESTOBJECTREADWRITE_CID},
+    {"@mozilla.org/js/xpc/test/native/Params;1", &kNS_XPCTESTPARAMS_CID},
+    {"@mozilla.org/js/xpc/test/native/ReturnCodeParent;1",
+     &kNS_XPCTESTRETURNCODEPARENT_CID},
+    {nullptr}};
+
+const mozilla::Module kXPCTestModule = {mozilla::Module::kVersion, kXPCTestCIDs,
+                                        kXPCTestContracts};
diff --git a/js/xpconnect/tests/components/native/xpctest_params.cpp b/js/xpconnect/tests/components/native/xpctest_params.cpp
new file mode 100644
index 0000000000..e8c7b9787b
--- /dev/null
+++ b/js/xpconnect/tests/components/native/xpctest_params.cpp
@@ -0,0 +1,398 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xpctest_private.h"
+#include "xpctest_interfaces.h"
+#include "js/Value.h"
+
+#include "nsCOMPtr.h"
+#include "nsComponentManagerUtils.h"
+#include "nsIURI.h"
+
+NS_IMPL_ISUPPORTS(nsXPCTestParams, nsIXPCTestParams)
+
+#define GENERIC_METHOD_IMPL \
+  {                         \
+    *_retval = *b;          \
+    *b = a;                 \
+    return NS_OK;           \
+  }
+
+#define STRING_METHOD_IMPL \
+  {                        \
+    _retval.Assign(b);     \
+    b.Assign(a);           \
+    return NS_OK;          \
+  }
+
+#define SEQUENCE_METHOD_IMPL(TAKE_OWNERSHIP)                        \
+  {                                                                 \
+    _retval = std::move(b);                                         \
+    b = a.Clone();                                                  \
+    for (uint32_t i = 0; i < b.Length(); ++i) TAKE_OWNERSHIP(b[i]); \
+    return NS_OK;                                                   \
+  }
+
+#define TAKE_OWNERSHIP_NOOP(val) \
+  {}
+#define TAKE_OWNERSHIP_INTERFACE(val) \
+  { static_cast<nsISupports*>(val)->AddRef(); }
+#define TAKE_OWNERSHIP_STRING(val)  \
+  {                                 \
+    nsDependentCString vprime(val); \
+    val = ToNewCString(vprime);     \
+  }
+#define TAKE_OWNERSHIP_WSTRING(val) \
+  {                                 \
+    nsDependentString vprime(val);  \
+    val = ToNewUnicode(vprime);     \
+  }
+
+// Macro for our buffer-oriented types:
+//   'type' is the type of element that the buffer contains.
+//   'padding' is an offset added to length, allowing us to handle
+//             null-terminated strings.
+//   'TAKE_OWNERSHIP' is one of the macros above.
+#define BUFFER_METHOD_IMPL(type, padding, TAKE_OWNERSHIP)                      \
+  {                                                                            \
+    uint32_t elemSize = sizeof(type);                                          \
+                                                                               \
+    /* Copy b into rv. */                                                      \
+    *rvLength = *bLength;                                                      \
+    *rv = static_cast<type*>(moz_xmalloc(elemSize * (*bLength + padding)));    \
+    memcpy(*rv, *b, elemSize*(*bLength + padding));                            \
+                                                                               \
+    /* Copy a into b. */                                                       \
+    *bLength = aLength;                                                        \
+    free(*b);                                                                  \
+    *b = static_cast<type*>(moz_xmalloc(elemSize * (aLength + padding)));      \
+    memcpy(*b, a, elemSize*(aLength + padding));                               \
+                                                                               \
+    /* We need to take ownership of the data we got from a,                    \
+       since the caller owns it. */                                            \
+    for (unsigned i = 0; i < *bLength + padding; ++i) TAKE_OWNERSHIP((*b)[i]); \
+                                                                               \
+    return NS_OK;                                                              \
+  }
+
+NS_IMETHODIMP nsXPCTestParams::TestBoolean(bool a, bool* b, bool* _retval) {
+  GENERIC_METHOD_IMPL;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestOctet(uint8_t a, uint8_t* b,
+                                         uint8_t* _retval) {
+  GENERIC_METHOD_IMPL;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestShort(int16_t a, int16_t* b,
+                                         int16_t* _retval) {
+  GENERIC_METHOD_IMPL;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestLong(int32_t a, int32_t* b,
+                                        int32_t* _retval) {
+  GENERIC_METHOD_IMPL;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestLongLong(int64_t a, int64_t* b,
+                                            int64_t* _retval) {
+  GENERIC_METHOD_IMPL;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestUnsignedShort(uint16_t a, uint16_t* b,
+                                                 uint16_t* _retval) {
+  GENERIC_METHOD_IMPL;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestUnsignedLong(uint32_t a, uint32_t* b,
+                                                uint32_t* _retval) {
+  GENERIC_METHOD_IMPL;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestUnsignedLongLong(uint64_t a, uint64_t* b,
+                                                    uint64_t* _retval) {
+  GENERIC_METHOD_IMPL;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestFloat(float a, float* b, float* _retval) {
+  GENERIC_METHOD_IMPL;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestDouble(double a, float* b, double* _retval) {
+  GENERIC_METHOD_IMPL;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestChar(char a, char* b, char* _retval) {
+  GENERIC_METHOD_IMPL;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestString(const char* a, char** b,
+                                          char** _retval) {
+  nsDependentCString aprime(a);
+  nsDependentCString bprime(*b);
+  *_retval = ToNewCString(bprime);
+  *b = ToNewCString(aprime);
+
+  // XPCOM ownership rules dictate that overwritten inout params must be
+  // callee-freed. See https://developer.mozilla.org/en/XPIDL
+  free(const_cast<char*>(bprime.get()));
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestWchar(char16_t a, char16_t* b,
+                                         char16_t* _retval) {
+  GENERIC_METHOD_IMPL;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestWstring(const char16_t* a, char16_t** b,
+                                           char16_t** _retval) {
+  nsDependentString aprime(a);
+  nsDependentString bprime(*b);
+  *_retval = ToNewUnicode(bprime);
+  *b = ToNewUnicode(aprime);
+
+  // XPCOM ownership rules dictate that overwritten inout params must be
+  // callee-freed. See https://developer.mozilla.org/en/XPIDL
+  free((void*)bprime.get());
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestAString(const nsAString& a, nsAString& b,
+                                           nsAString& _retval) {
+  STRING_METHOD_IMPL;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestAUTF8String(const nsACString& a,
+                                               nsACString& b,
+                                               nsACString& _retval) {
+  STRING_METHOD_IMPL;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestACString(const nsACString& a, nsACString& b,
+                                            nsACString& _retval) {
+  STRING_METHOD_IMPL;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestJsval(JS::Handle<JS::Value> a,
+                                         JS::MutableHandle<JS::Value> b,
+                                         JS::MutableHandle<JS::Value> _retval) {
+  _retval.set(b);
+  b.set(a);
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestShortArray(uint32_t aLength, int16_t* a,
+                                              uint32_t* bLength, int16_t** b,
+                                              uint32_t* rvLength,
+                                              int16_t** rv) {
+  BUFFER_METHOD_IMPL(int16_t, 0, TAKE_OWNERSHIP_NOOP);
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestDoubleArray(uint32_t aLength, double* a,
+                                               uint32_t* bLength, double** b,
+                                               uint32_t* rvLength,
+                                               double** rv) {
+  BUFFER_METHOD_IMPL(double, 0, TAKE_OWNERSHIP_NOOP);
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestStringArray(uint32_t aLength, const char** a,
+                                               uint32_t* bLength, char*** b,
+                                               uint32_t* rvLength, char*** rv) {
+  BUFFER_METHOD_IMPL(char*, 0, TAKE_OWNERSHIP_STRING);
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestWstringArray(
+    uint32_t aLength, const char16_t** a, uint32_t* bLength, char16_t*** b,
+    uint32_t* rvLength, char16_t*** rv) {
+  BUFFER_METHOD_IMPL(char16_t*, 0, TAKE_OWNERSHIP_WSTRING);
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestInterfaceArray(
+    uint32_t aLength, nsIXPCTestInterfaceA** a, uint32_t* bLength,
+    nsIXPCTestInterfaceA*** b, uint32_t* rvLength, nsIXPCTestInterfaceA*** rv) {
+  BUFFER_METHOD_IMPL(nsIXPCTestInterfaceA*, 0, TAKE_OWNERSHIP_INTERFACE);
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestJsvalArray(uint32_t aLength, JS::Value* a,
+                                              uint32_t* bLength, JS::Value** b,
+                                              uint32_t* rvLength,
+                                              JS::Value** rv) {
+  BUFFER_METHOD_IMPL(JS::Value, 0, TAKE_OWNERSHIP_NOOP);
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestSizedString(uint32_t aLength, const char* a,
+                                               uint32_t* bLength, char** b,
+                                               uint32_t* rvLength, char** rv) {
+  BUFFER_METHOD_IMPL(char, 1, TAKE_OWNERSHIP_NOOP);
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestSizedWstring(uint32_t aLength,
+                                                const char16_t* a,
+                                                uint32_t* bLength, char16_t** b,
+                                                uint32_t* rvLength,
+                                                char16_t** rv) {
+  BUFFER_METHOD_IMPL(char16_t, 1, TAKE_OWNERSHIP_NOOP);
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestInterfaceIs(const nsIID* aIID, void* a,
+                                               nsIID** bIID, void** b,
+                                               nsIID** rvIID, void** rv) {
+  //
+  // Getting the buffers and ownership right here can be a little tricky.
+  //
+
+  // The interface pointers are heap-allocated, and b has been AddRef'd
+  // by XPConnect for the duration of the call. If we snatch it away from b
+  // and leave no trace, XPConnect won't Release it. Since we also need to
+  // return an already-AddRef'd pointer in rv, we don't need to do anything
+  // special here.
+  *rv = *b;
+
+  // rvIID is out-only, so nobody allocated an IID buffer for us. Do that now,
+  // and store b's IID in the new buffer.
+  *rvIID = static_cast<nsIID*>(moz_xmalloc(sizeof(nsID)));
+  **rvIID = **bIID;
+
+  // Copy the interface pointer from a to b. Since a is in-only, XPConnect will
+  // release it upon completion of the call. AddRef it for b.
+  *b = a;
+  static_cast<nsISupports*>(*b)->AddRef();
+
+  // We already had a buffer allocated for b's IID, so we can re-use it.
+  **bIID = *aIID;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestInterfaceIsArray(
+    uint32_t aLength, const nsIID* aIID, void** a, uint32_t* bLength,
+    nsIID** bIID, void*** b, uint32_t* rvLength, nsIID** rvIID, void*** rv) {
+  // Transfer the IIDs. See the comments in TestInterfaceIs (above) for an
+  // explanation of what we're doing.
+  *rvIID = static_cast<nsIID*>(moz_xmalloc(sizeof(nsID)));
+  **rvIID = **bIID;
+  **bIID = *aIID;
+
+  // The macro is agnostic to the actual interface types, so we can re-use code
+  // here.
+  //
+  // Do this second, since the macro returns.
+  BUFFER_METHOD_IMPL(void*, 0, TAKE_OWNERSHIP_INTERFACE);
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestOutAString(nsAString& o) {
+  o.AssignLiteral("out");
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsXPCTestParams::TestStringArrayOptionalSize(const char** a,
+                                                           uint32_t length,
+                                                           nsACString& out) {
+  out.Truncate();
+  for (uint32_t i = 0; i < length; ++i) {
+    out.Append(a[i]);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsXPCTestParams::TestShortSequence(const nsTArray<short>& a, nsTArray<short>& b,
+                                   nsTArray<short>& _retval) {
+  SEQUENCE_METHOD_IMPL(TAKE_OWNERSHIP_NOOP);
+}
+
+NS_IMETHODIMP
+nsXPCTestParams::TestDoubleSequence(const nsTArray<double>& a,
+                                    nsTArray<double>& b,
+                                    nsTArray<double>& _retval) {
+  SEQUENCE_METHOD_IMPL(TAKE_OWNERSHIP_NOOP);
+}
+
+NS_IMETHODIMP
+nsXPCTestParams::TestInterfaceSequence(
+    const nsTArray<RefPtr<nsIXPCTestInterfaceA>>& a,
+    nsTArray<RefPtr<nsIXPCTestInterfaceA>>& b,
+    nsTArray<RefPtr<nsIXPCTestInterfaceA>>& _retval) {
+  SEQUENCE_METHOD_IMPL(TAKE_OWNERSHIP_NOOP);
+}
+
+NS_IMETHODIMP
+nsXPCTestParams::TestAStringSequence(const nsTArray<nsString>& a,
+                                     nsTArray<nsString>& b,
+                                     nsTArray<nsString>& _retval) {
+  SEQUENCE_METHOD_IMPL(TAKE_OWNERSHIP_NOOP);
+}
+
+NS_IMETHODIMP
+nsXPCTestParams::TestACStringSequence(const nsTArray<nsCString>& a,
+                                      nsTArray<nsCString>& b,
+                                      nsTArray<nsCString>& _retval) {
+  SEQUENCE_METHOD_IMPL(TAKE_OWNERSHIP_NOOP);
+}
+
+NS_IMETHODIMP
+nsXPCTestParams::TestJsvalSequence(const nsTArray<JS::Value>& a,
+                                   nsTArray<JS::Value>& b,
+                                   nsTArray<JS::Value>& _retval) {
+  SEQUENCE_METHOD_IMPL(TAKE_OWNERSHIP_NOOP);
+}
+
+NS_IMETHODIMP
+nsXPCTestParams::TestSequenceSequence(const nsTArray<nsTArray<short>>& a,
+                                      nsTArray<nsTArray<short>>& b,
+                                      nsTArray<nsTArray<short>>& _retval) {
+  _retval = std::move(b);
+  for (const auto& element : a) {
+    b.AppendElement(element.Clone());
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsXPCTestParams::TestInterfaceIsSequence(const nsIID* aIID,
+                                         const nsTArray<void*>& a, nsIID** bIID,
+                                         nsTArray<void*>& b, nsIID** rvIID,
+                                         nsTArray<void*>& _retval) {
+  // Shuffle around our nsIIDs
+  *rvIID = (*bIID)->Clone();
+  *bIID = aIID->Clone();
+
+  // Perform the generic sequence shuffle.
+  SEQUENCE_METHOD_IMPL(TAKE_OWNERSHIP_INTERFACE);
+}
+
+NS_IMETHODIMP
+nsXPCTestParams::TestOptionalSequence(const nsTArray<uint8_t>& aInArr,
+                                      nsTArray<uint8_t>& aReturnArr) {
+  aReturnArr = aInArr.Clone();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsXPCTestParams::TestOmittedOptionalOut(nsIURI** aOut) {
+  MOZ_ASSERT(!(*aOut), "Unexpected value received");
+  // Call the js component, to check XPConnect won't crash when passing nullptr
+  // as the optional out parameter, and that the out object is built regardless.
+  nsresult rv;
+  nsCOMPtr<nsIXPCTestParams> jsComponent =
+      do_CreateInstance("@mozilla.org/js/xpc/test/js/Params;1", &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+  // Invoke it directly passing nullptr.
+  rv = jsComponent->TestOmittedOptionalOut(nullptr);
+  NS_ENSURE_SUCCESS(rv, rv);
+  // Also invoke it with a ref pointer.
+  nsCOMPtr<nsIURI> someURI;
+  rv = jsComponent->TestOmittedOptionalOut(getter_AddRefs(someURI));
+  NS_ENSURE_SUCCESS(rv, rv);
+  nsAutoCString spec;
+  rv = someURI->GetSpec(spec);
+  if (!spec.EqualsLiteral("http://example.com/")) {
+    return NS_ERROR_UNEXPECTED;
+  }
+  someURI.forget(aOut);
+  return NS_OK;
+}
diff --git a/js/xpconnect/tests/components/native/xpctest_private.h b/js/xpconnect/tests/components/native/xpctest_private.h
new file mode 100644
index 0000000000..371ccd6621
--- /dev/null
+++ b/js/xpconnect/tests/components/native/xpctest_private.h
@@ -0,0 +1,92 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* local header for xpconnect tests components */
+
+#ifndef xpctest_private_h___
+#define xpctest_private_h___
+
+#include "nsISupports.h"
+#include "nsMemory.h"
+#include "nsString.h"
+#include "xpctest_attributes.h"
+#include "xpctest_params.h"
+#include "xpctest_returncode.h"
+#include "xpctest_cenums.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/ModuleUtils.h"
+
+extern const mozilla::Module kXPCTestModule;
+
+class xpcTestObjectReadOnly final : public nsIXPCTestObjectReadOnly {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIXPCTESTOBJECTREADONLY
+  xpcTestObjectReadOnly();
+
+ private:
+  ~xpcTestObjectReadOnly() = default;
+
+  bool boolProperty;
+  int16_t shortProperty;
+  int32_t longProperty;
+  float floatProperty;
+  char charProperty;
+  PRTime timeProperty;
+};
+
+class xpcTestObjectReadWrite final : public nsIXPCTestObjectReadWrite {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIXPCTESTOBJECTREADWRITE
+
+  xpcTestObjectReadWrite();
+
+ private:
+  ~xpcTestObjectReadWrite();
+
+  bool boolProperty;
+  int16_t shortProperty;
+  int32_t longProperty;
+  float floatProperty;
+  char charProperty;
+  char* stringProperty;
+  PRTime timeProperty;
+};
+
+class nsXPCTestParams final : public nsIXPCTestParams {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIXPCTESTPARAMS
+
+  nsXPCTestParams() = default;
+
+ private:
+  ~nsXPCTestParams() = default;
+};
+
+class nsXPCTestReturnCodeParent final : public nsIXPCTestReturnCodeParent {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIXPCTESTRETURNCODEPARENT
+
+  nsXPCTestReturnCodeParent() = default;
+
+ private:
+  ~nsXPCTestReturnCodeParent() = default;
+};
+
+class xpcTestCEnums final : public nsIXPCTestCEnums {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIXPCTESTCENUMS
+
+  xpcTestCEnums();
+
+ private:
+  ~xpcTestCEnums() = default;
+};
+#endif /* xpctest_private_h___ */
diff --git a/js/xpconnect/tests/components/native/xpctest_returncode.cpp b/js/xpconnect/tests/components/native/xpctest_returncode.cpp
new file mode 100644
index 0000000000..6b9b24a3cd
--- /dev/null
+++ b/js/xpconnect/tests/components/native/xpctest_returncode.cpp
@@ -0,0 +1,19 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "xpctest_private.h"
+#include "nsComponentManagerUtils.h"
+
+NS_IMPL_ISUPPORTS(nsXPCTestReturnCodeParent, nsIXPCTestReturnCodeParent)
+
+NS_IMETHODIMP nsXPCTestReturnCodeParent::CallChild(int32_t childBehavior,
+                                                   nsresult* _retval) {
+  nsresult rv;
+  nsCOMPtr<nsIXPCTestReturnCodeChild> child(
+      do_CreateInstance("@mozilla.org/js/xpc/test/js/ReturnCodeChild;1", &rv));
+  NS_ENSURE_SUCCESS(rv, rv);
+  rv = child->DoIt(childBehavior);
+  *_retval = rv;
+  return NS_OK;
+}