[destructuring] More tests for object literal pattern

test/mjsunit/harmony/destructuring.js

Index: test/mjsunit/harmony/destructuring.js
diff --git a/test/mjsunit/harmony/destructuring.js b/test/mjsunit/harmony/destructuring.js
index 3cfb6fc528ec6f981108d16b271251b6a3c6e3b7..d5848d544a5201a146e179c249dc088f816c420f 100644
--- a/test/mjsunit/harmony/destructuring.js
+++ b/test/mjsunit/harmony/destructuring.js
@@ -18,6 +18,30 @@
     sum += z;
   }
   assertEquals(6, sum);
+
+
+  var countX = 0;
+  var countY = 0;
+  var countZ = 0;
+  var o = {
+    get x() {
+      countX++;
+      return 0;
+    },
+    get y() {
+      countY++;
+      return {
+        get z() { countZ++; return 1; }
+      }
+    }
+  };
+  var { x : x0, y : { z : z1 }, x : x1 } = o;
+  assertSame(0, x0);
+  assertSame(1, z1);
+  assertSame(0, x1);
+  assertEquals(2, countX);
+  assertEquals(1, countY);
+  assertEquals(1, countZ);
 }());
 
 
@@ -30,6 +54,29 @@
   let {z} = { z : 3 };
   assertEquals(3, z);
 
+  let countX = 0;
+  let countY = 0;
+  let countZ = 0;
+  let o = {
+    get x() {
+      countX++;
+      return 0;
+    },
+    get y() {
+      countY++;
+      return {
+        get z() { countZ++; return 1; }
+      }
+    }
+  };
+  let { x : x0, y : { z : z1 }, x : x1 } = o;

[arv (Not doing code reviews), 2015/05/18 14:00:27]

This makes me wish we had a test that makes sure we do all the getters in the
right order.

[Dmitry Lomov (no reviews), 2015/05/18 14:25:56]

Done.

+  assertSame(0, x0);
+  assertSame(1, z1);
+  assertSame(0, x1);
+  assertEquals(2, countX);
+  assertEquals(1, countY);
+  assertEquals(1, countZ);
+
 
   let sum = 0;
   for(let {x, z} = { x : 0, z : 3 }; z != 0; z--) {
@@ -46,6 +93,9 @@
   assertEquals(1, x);
   assertEquals(2, y);
 
+  assertThrows(function() { x++; }, TypeError);
+  assertThrows(function() { y++; }, TypeError);
+
   const {z} = { z : 3 };
   assertEquals(3, z);
 
@@ -54,3 +104,45 @@
     assertTrue(false);
   }
 }());
+
+(function TestFailingMatchesSloppy() {
+  var {x, y} = {};
+  assertSame(undefined, x);
+  assertSame(undefined, y);
+
+  var { x : { z1 }, y2} = { x : {}, y2 : 42 }
+  assertSame(undefined, z1);
+  assertSame(42, y2);
+}());
+
+
+(function TestFailingMatchesStrict() {
+  'use strict';
+  var {x, y} = {};
+  assertSame(undefined, x);
+  assertSame(undefined, y);
+
+  var { x : { z1 }, y2} = { x : {}, y2 : 42 }
+  assertSame(undefined, z1);
+  assertSame(42, y2);
+
+  {
+    let {x1,y1} = {};
+    assertSame(undefined, x1);
+    assertSame(undefined, y1);
+
+    let { x : { z1 }, y2} = { x : {}, y2 : 42 }
+    assertSame(undefined, z1);
+    assertSame(42, y2);
+  }
+}());
+
+
+(function TestExceptions() {
+  assertThrows(function() { var {} = null; }, TypeError);
+  assertThrows(function() { var {x} = null; }, TypeError);
+  assertThrows(function() { var { x : {} } = { x : null }; }, TypeError);
+  assertThrows(function() { 'use strict'; let {} = null; }, TypeError);
+  assertThrows(function() { 'use strict'; let {x} = null; }, TypeError);
+  assertThrows(function() { 'use strict'; let { x : {} } = { x : null }; }, TypeError);
+}());