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diff --git a/dom/indexedDB/test/unit/test_complex_keyPaths.js b/dom/indexedDB/test/unit/test_complex_keyPaths.js
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+++ b/dom/indexedDB/test/unit/test_complex_keyPaths.js
@@ -0,0 +1,329 @@
+/**
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+/* exported testGenerator */
+var testGenerator = testSteps();
+
+function* testSteps() {
+  // Test object stores
+
+  const name = "test_complex_keyPaths";
+  const keyPaths = [
+    { keyPath: "id", value: { id: 5 }, key: 5 },
+    { keyPath: "id", value: { id: "14", iid: 12 }, key: "14" },
+    { keyPath: "id", value: { iid: "14", id: 12 }, key: 12 },
+    { keyPath: "id", value: {} },
+    { keyPath: "id", value: { id: {} } },
+    { keyPath: "id", value: { id: /x/ } },
+    { keyPath: "id", value: 2 },
+    { keyPath: "id", value: undefined },
+    { keyPath: "foo.id", value: { foo: { id: 7 } }, key: 7 },
+    { keyPath: "foo.id", value: { id: 7, foo: { id: "asdf" } }, key: "asdf" },
+    { keyPath: "foo.id", value: { foo: { id: undefined } } },
+    { keyPath: "foo.id", value: { foo: 47 } },
+    { keyPath: "foo.id", value: {} },
+    { keyPath: "", value: "foopy", key: "foopy" },
+    { keyPath: "", value: 2, key: 2 },
+    { keyPath: "", value: undefined },
+    { keyPath: "", value: { id: 12 } },
+    { keyPath: "", value: /x/ },
+    {
+      keyPath: "foo.bar",
+      value: { baz: 1, foo: { baz2: 2, bar: "xo" } },
+      key: "xo",
+    },
+    {
+      keyPath: "foo.bar.baz",
+      value: { foo: { bar: { bazz: 16, baz: 17 } } },
+      key: 17,
+    },
+    { keyPath: "foo..id", exception: true },
+    { keyPath: "foo.", exception: true },
+    { keyPath: "fo o", exception: true },
+    { keyPath: "foo ", exception: true },
+    { keyPath: "foo[bar]", exception: true },
+    { keyPath: "foo[1]", exception: true },
+    { keyPath: "$('id').stuff", exception: true },
+    { keyPath: "foo.2.bar", exception: true },
+    { keyPath: "foo. .bar", exception: true },
+    { keyPath: ".bar", exception: true },
+    { keyPath: [], exception: true },
+
+    { keyPath: ["foo", "bar"], value: { foo: 1, bar: 2 }, key: [1, 2] },
+    { keyPath: ["foo"], value: { foo: 1, bar: 2 }, key: [1] },
+    {
+      keyPath: ["foo", "bar", "bar"],
+      value: { foo: 1, bar: "x" },
+      key: [1, "x", "x"],
+    },
+    { keyPath: ["x", "y"], value: { x: [], y: "x" }, key: [[], "x"] },
+    { keyPath: ["x", "y"], value: { x: [[1]], y: "x" }, key: [[[1]], "x"] },
+    {
+      keyPath: ["x", "y"],
+      value: { x: [[1]], y: new Date(1) },
+      key: [[[1]], new Date(1)],
+    },
+    {
+      keyPath: ["x", "y"],
+      value: { x: [[1]], y: [new Date(3)] },
+      key: [[[1]], [new Date(3)]],
+    },
+    {
+      keyPath: ["x", "y.bar"],
+      value: { x: "hi", y: { bar: "x" } },
+      key: ["hi", "x"],
+    },
+    {
+      keyPath: ["x.y", "y.bar"],
+      value: { x: { y: "hello" }, y: { bar: "nurse" } },
+      key: ["hello", "nurse"],
+    },
+    { keyPath: ["", ""], value: 5, key: [5, 5] },
+    { keyPath: ["x", "y"], value: { x: 1 } },
+    { keyPath: ["x", "y"], value: { y: 1 } },
+    { keyPath: ["x", "y"], value: { x: 1, y: undefined } },
+    { keyPath: ["x", "y"], value: { x: null, y: 1 } },
+    { keyPath: ["x", "y.bar"], value: { x: null, y: { bar: "x" } } },
+    { keyPath: ["x", "y"], value: { x: 1, y: false } },
+    { keyPath: ["x", "y", "z"], value: { x: 1, y: false, z: "a" } },
+    { keyPath: [".x", "y", "z"], exception: true },
+    { keyPath: ["x", "y ", "z"], exception: true },
+  ];
+
+  let openRequest = indexedDB.open(name, 1);
+  openRequest.onerror = errorHandler;
+  openRequest.onupgradeneeded = grabEventAndContinueHandler;
+  openRequest.onsuccess = unexpectedSuccessHandler;
+  let event = yield undefined;
+  let db = event.target.result;
+
+  let stores = {};
+
+  // Test creating object stores and inserting data
+  for (let i = 0; i < keyPaths.length; i++) {
+    let info = keyPaths[i];
+
+    let test = " for objectStore test " + JSON.stringify(info);
+    let indexName = JSON.stringify(info.keyPath);
+    if (!stores[indexName]) {
+      try {
+        let objectStore = db.createObjectStore(indexName, {
+          keyPath: info.keyPath,
+        });
+        ok(!("exception" in info), "shouldn't throw" + test);
+        is(
+          JSON.stringify(objectStore.keyPath),
+          JSON.stringify(info.keyPath),
+          "correct keyPath property" + test
+        );
+        ok(
+          // eslint-disable-next-line no-self-compare
+          objectStore.keyPath === objectStore.keyPath,
+          "object identity should be preserved"
+        );
+        stores[indexName] = objectStore;
+      } catch (e) {
+        ok("exception" in info, "should throw" + test);
+        is(e.name, "SyntaxError", "expect a SyntaxError" + test);
+        ok(e instanceof DOMException, "Got a DOM Exception" + test);
+        is(e.code, DOMException.SYNTAX_ERR, "expect a syntax error" + test);
+        continue;
+      }
+    }
+
+    let store = stores[indexName];
+
+    try {
+      var request = store.add(info.value);
+      ok("key" in info, "successfully created request to insert value" + test);
+    } catch (e) {
+      ok(!("key" in info), "threw when attempted to insert" + test);
+      ok(e instanceof DOMException, "Got a DOMException" + test);
+      is(e.name, "DataError", "expect a DataError" + test);
+      is(e.code, 0, "expect zero" + test);
+      continue;
+    }
+
+    request.onerror = errorHandler;
+    request.onsuccess = grabEventAndContinueHandler;
+
+    let e = yield undefined;
+    is(e.type, "success", "inserted successfully" + test);
+    is(e.target, request, "expected target" + test);
+    ok(compareKeys(request.result, info.key), "found correct key" + test);
+    is(
+      indexedDB.cmp(request.result, info.key),
+      0,
+      "returned key compares correctly" + test
+    );
+
+    store.get(info.key).onsuccess = grabEventAndContinueHandler;
+    e = yield undefined;
+    isnot(e.target.result, undefined, "Did find entry");
+
+    // Check that cursor.update work as expected
+    request = store.openCursor();
+    request.onerror = errorHandler;
+    request.onsuccess = grabEventAndContinueHandler;
+    e = yield undefined;
+    let cursor = e.target.result;
+    request = cursor.update(info.value);
+    request.onerror = errorHandler;
+    request.onsuccess = grabEventAndContinueHandler;
+    yield undefined;
+    ok(true, "Successfully updated cursor" + test);
+
+    // Check that cursor.update throws as expected when key is changed
+    let newValue = cursor.value;
+    let destProp = Array.isArray(info.keyPath) ? info.keyPath[0] : info.keyPath;
+    if (destProp) {
+      let splitDestProp = destProp.split(".");
+      if (splitDestProp.length == 1) {
+        newValue[splitDestProp[0]] = "newKeyValue";
+      } else if (splitDestProp.length == 2) {
+        newValue[splitDestProp[0]][splitDestProp[1]] = "newKeyValue";
+      } else {
+        newValue[splitDestProp[0]][splitDestProp[1]][splitDestProp[2]] =
+          "newKeyValue";
+      }
+    } else {
+      newValue = "newKeyValue";
+    }
+    let didThrow;
+    try {
+      cursor.update(newValue);
+    } catch (ex) {
+      didThrow = ex;
+    }
+    ok(didThrow instanceof DOMException, "Got a DOMException" + test);
+    is(didThrow.name, "DataError", "expect a DataError" + test);
+    is(didThrow.code, 0, "expect zero" + test);
+
+    // Clear object store to prepare for next test
+    store.clear().onsuccess = grabEventAndContinueHandler;
+    yield undefined;
+  }
+
+  // Attempt to create indexes and insert data
+  let store = db.createObjectStore("indexStore");
+  let indexes = {};
+  for (let i = 0; i < keyPaths.length; i++) {
+    let info = keyPaths[i];
+    let test = " for index test " + JSON.stringify(info);
+    let indexName = JSON.stringify(info.keyPath);
+    if (!indexes[indexName]) {
+      try {
+        let index = store.createIndex(indexName, info.keyPath);
+        ok(!("exception" in info), "shouldn't throw" + test);
+        is(
+          JSON.stringify(index.keyPath),
+          JSON.stringify(info.keyPath),
+          "index has correct keyPath property" + test
+        );
+        ok(
+          // eslint-disable-next-line no-self-compare
+          index.keyPath === index.keyPath,
+          "object identity should be preserved"
+        );
+        indexes[indexName] = index;
+      } catch (e) {
+        ok("exception" in info, "should throw" + test);
+        is(e.name, "SyntaxError", "expect a SyntaxError" + test);
+        ok(e instanceof DOMException, "Got a DOM Exception" + test);
+        is(e.code, DOMException.SYNTAX_ERR, "expect a syntax error" + test);
+        continue;
+      }
+    }
+
+    let index = indexes[indexName];
+
+    request = store.add(info.value, 1);
+    if ("key" in info) {
+      index.getKey(info.key).onsuccess = grabEventAndContinueHandler;
+      let e = yield undefined;
+      is(e.target.result, 1, "found value when reading" + test);
+    } else {
+      index.count().onsuccess = grabEventAndContinueHandler;
+      let e = yield undefined;
+      is(e.target.result, 0, "should be empty" + test);
+    }
+
+    store.clear().onsuccess = grabEventAndContinueHandler;
+    yield undefined;
+  }
+
+  // Autoincrement and complex key paths
+  let aitests = [
+    { v: {}, k: 1, res: { foo: { id: 1 } } },
+    { v: { value: "x" }, k: 2, res: { value: "x", foo: { id: 2 } } },
+    { v: { value: "x", foo: {} }, k: 3, res: { value: "x", foo: { id: 3 } } },
+    {
+      v: { v: "x", foo: { x: "y" } },
+      k: 4,
+      res: { v: "x", foo: { x: "y", id: 4 } },
+    },
+    { v: { value: 2, foo: { id: 10 } }, k: 10 },
+    { v: { value: 2 }, k: 11, res: { value: 2, foo: { id: 11 } } },
+    { v: true },
+    { v: { value: 2, foo: 12 } },
+    { v: { foo: { id: true } } },
+    { v: { foo: { x: 5, id: {} } } },
+    { v: undefined },
+    { v: { foo: undefined } },
+    { v: { foo: { id: undefined } } },
+    { v: null },
+    { v: { foo: null } },
+    { v: { foo: { id: null } } },
+  ];
+
+  store = db.createObjectStore("gen", {
+    keyPath: "foo.id",
+    autoIncrement: true,
+  });
+  for (let i = 0; i < aitests.length; ++i) {
+    let info = aitests[i];
+    let test = " for autoIncrement test " + JSON.stringify(info);
+
+    let preValue = JSON.stringify(info.v);
+    if ("k" in info) {
+      store.add(info.v).onsuccess = grabEventAndContinueHandler;
+      is(JSON.stringify(info.v), preValue, "put didn't modify value" + test);
+    } else {
+      try {
+        store.add(info.v);
+        ok(false, "should throw" + test);
+      } catch (e) {
+        ok(true, "did throw" + test);
+        ok(e instanceof DOMException, "Got a DOMException" + test);
+        is(e.name, "DataError", "expect a DataError" + test);
+        is(e.code, 0, "expect zero" + test);
+
+        is(
+          JSON.stringify(info.v),
+          preValue,
+          "failing put didn't modify value" + test
+        );
+
+        continue;
+      }
+    }
+
+    let e = yield undefined;
+    is(e.target.result, info.k, "got correct return key" + test);
+
+    store.get(info.k).onsuccess = grabEventAndContinueHandler;
+    e = yield undefined;
+    is(
+      JSON.stringify(e.target.result),
+      JSON.stringify(info.res || info.v),
+      "expected value stored" + test
+    );
+  }
+
+  openRequest.onsuccess = grabEventAndContinueHandler;
+  yield undefined;
+
+  finishTest();
+}