Add m-esr52 at 52.6.0

1 files changed, 45 insertions, 0 deletions

diff --git a/js/src/tests/ecma_6/Class/superCallThisInit.js b/js/src/tests/ecma_6/Class/superCallThisInit.js
new file mode 100644
index 000000000..4154b3611
--- /dev/null
+++ b/js/src/tests/ecma_6/Class/superCallThisInit.js
@@ -0,0 +1,45 @@
+function base() { this.prop = 42; }
+
+class testInitialize extends base {
+    constructor() {
+        // A poor man's assertThrowsInstanceOf, as arrow functions are currently
+        // disabled in this context
+        try {
+            this;
+            throw new Error();
+        } catch (e if e instanceof ReferenceError) { }
+        super();
+        assertEq(this.prop, 42);
+    }
+}
+assertEq(new testInitialize().prop, 42);
+
+// super() twice is a no-go.
+class willThrow extends base {
+    constructor() {
+        super();
+        super();
+    }
+}
+assertThrowsInstanceOf(()=>new willThrow(), ReferenceError);
+
+// This is determined at runtime, not the syntax level.
+class willStillThrow extends base {
+    constructor() {
+        for (let i = 0; i < 3; i++) {
+            super();
+        }
+    }
+}
+assertThrowsInstanceOf(()=>new willStillThrow(), ReferenceError);
+
+class canCatchThrow extends base {
+    constructor() {
+        super();
+        try { super(); } catch(e) { }
+    }
+}
+assertEq(new canCatchThrow().prop, 42);
+
+if (typeof reportCompare === 'function')
+    reportCompare(0,0,"OK");