1 files changed, 87 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/watchtower/basic.js b/js/src/jit-test/tests/watchtower/basic.js
new file mode 100644
index 0000000000..dd3bbb45ff
--- /dev/null
+++ b/js/src/jit-test/tests/watchtower/basic.js
@@ -0,0 +1,87 @@
+function getLogString(obj) {
+    let log = getWatchtowerLog();
+    return log.map(item => {
+        assertEq(item.object, obj);
+        if (typeof item.extra === "symbol") {
+            item.extra = "<symbol>";
+        }
+        return item.kind + (item.extra ? ": " + item.extra : "");
+    }).join("\n");
+}
+
+function testBasic() {
+    let o = {};
+    addWatchtowerTarget(o);
+
+    o.x = 1;
+    o.y = 2;
+    o[Symbol()] = 3;
+    Object.defineProperty(o, "foo", {enumerable: false, configurable: false, value: 1});
+    Object.defineProperty(o, "getter", {get() { return 123; }});
+    o.__proto__ = {};
+    o.__proto__ = null;
+    o[12345] = 1; // Sparse elements are included for now.
+    delete o.x;
+    Object.defineProperty(o, "y", {writable: false});
+    Object.defineProperty(o, "x", {value: 0});
+    Object.seal(o);
+    Object.freeze(o);
+
+    let log = getLogString(o);
+    assertEq(log,
+`add-prop: x
+add-prop: y
+add-prop: <symbol>
+add-prop: foo
+add-prop: getter
+proto-change
+proto-change
+add-prop: 12345
+remove-prop: x
+change-prop: y
+add-prop: x
+freeze-or-seal
+freeze-or-seal`);
+}
+for (var i = 0; i < 20; i++) {
+    testBasic();
+}
+
+// Object.assign edge case.
+function testAssign() {
+    let o = {};
+    o.x = 1;
+    delete o.x;
+    let from = {x: 1, y: 2, z: 3, a: 4};
+    addWatchtowerTarget(o);
+    addWatchtowerTarget(from);
+    Object.assign(o, from);
+    let log = getLogString(o);
+    assertEq(log, "add-prop: x\nadd-prop: y\nadd-prop: z\nadd-prop: a");
+}
+testAssign();
+
+function testJit() {
+    for (var i = 0; i < 20; i++) {
+        let o = {};
+        addWatchtowerTarget(o);
+        o.x = 1;
+        o.y = 2;
+        let log = getLogString(o);
+        assertEq(log, "add-prop: x\nadd-prop: y");
+    }
+}
+testJit();
+
+// array.length is a custom data property.
+function testCustomDataProp() {
+    let o = [];
+    addWatchtowerTarget(o);
+
+    Object.defineProperty(o, "length", {writable: false});
+    let log = getLogString(o);
+    assertEq(log, "change-prop: length");
+}
+for (var i = 0; i < 20; i++) {
+    testCustomDataProp();
+}