Add m-esr52 at 52.6.0

1 files changed, 58 insertions, 0 deletions

diff --git a/js/src/tests/ecma_6/Class/superPropChains.js b/js/src/tests/ecma_6/Class/superPropChains.js
new file mode 100644
index 000000000..e8c0de05c
--- /dev/null
+++ b/js/src/tests/ecma_6/Class/superPropChains.js
@@ -0,0 +1,58 @@
+// First, let's test the trivial. A chain of three works.
+class base {
+    constructor() { }
+    testChain() {
+        this.baseCalled = true;
+    }
+}
+
+class middle extends base {
+    constructor() { super(); }
+    testChain() {
+        this.middleCalled = true;
+        super.testChain();
+    }
+}
+
+class derived extends middle {
+    constructor() { super(); }
+    testChain() {
+        super.testChain();
+        assertEq(this.middleCalled, true);
+        assertEq(this.baseCalled, true);
+    }
+}
+
+new derived().testChain();
+
+// Super even chains in a wellbehaved fashion with normal functions.
+function bootlegMiddle() { }
+bootlegMiddle.prototype = middle.prototype;
+
+new class extends bootlegMiddle {
+        constructor() { super(); }
+        testChain() {
+            super.testChain();
+            assertEq(this.middleCalled, true);
+            assertEq(this.baseCalled, true);
+        }
+    }().testChain();
+
+// Now let's try out some "long" chains
+base.prototype.x = "yeehaw";
+
+let chain = class extends base { constructor() { super(); } }
+
+const CHAIN_LENGTH = 100;
+for (let i = 0; i < CHAIN_LENGTH; i++)
+    chain = class extends chain { constructor() { super(); } }
+
+// Now we poke the chain
+let inst = new chain();
+inst.testChain();
+assertEq(inst.baseCalled, true);
+
+assertEq(inst.x, "yeehaw");
+
+if (typeof reportCompare === 'function')
+    reportCompare(0,0,"OK");