Improve some yield cases based on feedback

src/async-generators/yield-identifier-spread-non-strict.case

@@ -16,6 +16,8 @@ features: [object-spread]
 flags: [noStrict, async]
 ---*/
 
+//- setup
+var s = Symbol('s');
 //- body
   yield {
      ...yield yield,
@@ -30,8 +32,8 @@ var iter = gen();
 
 iter.next();
 iter.next();
-iter.next({ x: 10, a: 0, b: 0 });
+iter.next({ x: 10, a: 0, b: 0, [s]: 1 });
-iter.next({ y: 20, a: 1, b: 1 });
+iter.next({ y: 20, a: 1, b: 1, [s]: 42 });
 var item = iter.next({ z: 30, b: 2 });
 
 item.then(({ done, value }) => {
@@ -41,5 +43,7 @@ item.then(({ done, value }) => {
   assert.sameValue(value.z, 30);
   assert.sameValue(value.a, 1);
   assert.sameValue(value.b, 2);
+  assert.sameValue(value[s], 42);
   assert.sameValue(Object.keys(value).length, 5);
+  assert(Object.hasOwnProperty.call(value, s));
 }).then($DONE, $DONE);

src/async-generators/yield-spread-arr-single.case

@@ -9,8 +9,6 @@ info: |
 
   SpreadElement[Yield, Await]:
     ...AssignmentExpression[+In, ?Yield, ?Await]
-includes:
-  - compareArray.js
 flags: [async]
 ---*/
 
@@ -20,9 +18,14 @@ var arr = ['a', 'b', 'c'];
   yield [...yield];
 //- assertions
 iter.next(false);
-var item = iter.next(['a', 'b', 'c']);
+var item = iter.next(arr);
 
 item.then(({ done, value }) => {
-  assert(compareArray(value, arr));
+  assert.notSameValue(value, arr, 'value is a new array');
+  assert(Array.isArray(value), 'value is an Array exotic object');
+  assert.sameValue(value.length, 3)
+  assert.sameValue(value[0], 'a');
+  assert.sameValue(value[1], 'b');
+  assert.sameValue(value[2], 'c');
   assert.sameValue(done, false);
 }).then($DONE, $DONE);

src/generators/yield-identifier-spread-non-strict.case

@@ -16,6 +16,8 @@ features: [object-spread]
 flags: [noStrict]
 ---*/
 
+//- setup
+var s = Symbol('s');
 //- body
   yield {
      ...yield yield,
@@ -30,14 +32,18 @@ var iter = gen();
 
 iter.next();
 iter.next();
-iter.next({ x: 10, a: 0, b: 0 });
+iter.next({ x: 10, a: 0, b: 0, [s]: 1 });
-iter.next({ y: 20, a: 1, b: 1 });
+iter.next({ y: 20, a: 1, b: 1, [s]: 42 });
 var item = iter.next({ z: 30, b: 2 });
 
+var value = item.value;
+
 assert.sameValue(item.done, false);
-assert.sameValue(item.value.x, 10);
+assert.sameValue(value.x, 10);
-assert.sameValue(item.value.y, 20);
+assert.sameValue(value.y, 20);
-assert.sameValue(item.value.z, 30);
+assert.sameValue(value.z, 30);
-assert.sameValue(item.value.a, 1);
+assert.sameValue(value.a, 1);
-assert.sameValue(item.value.b, 2);
+assert.sameValue(value.b, 2);
-assert.sameValue(Object.keys(item.value).length, 5);
+assert.sameValue(value[s], 42);
+assert(Object.hasOwnProperty.call(value, s));
+assert.sameValue(Object.keys(value).length, 5);

src/generators/yield-spread-arr-single.case

@@ -9,8 +9,6 @@ info: |
 
   SpreadElement[Yield, Await]:
     ...AssignmentExpression[+In, ?Yield, ?Await]
-includes:
-  - compareArray.js
 ---*/
 
 //- setup
@@ -19,7 +17,13 @@ var arr = ['a', 'b', 'c'];
   yield [...yield];
 //- assertions
 iter.next(false);
-var item = iter.next(['a', 'b', 'c']);
+var item = iter.next(arr);
+var value = item.value;
 
-assert(compareArray(item.value, arr));
+assert.notSameValue(value, arr, 'value is a new array');
+assert(Array.isArray(value), 'value is an Array exotic object');
+assert.sameValue(value.length, 3)
+assert.sameValue(value[0], 'a');
+assert.sameValue(value[1], 'b');
+assert.sameValue(value[2], 'c');
 assert.sameValue(item.done, false);

src/spread/obj-symbol-property.case

@@ -29,6 +29,7 @@ obj
 //- body
 
 assert.sameValue(obj[symbol], 1);
+assert(Object.hasOwnProperty.call(obj, symbol));
 assert.sameValue(obj.c, 4);
 assert.sameValue(obj.d, 5);
 assert.sameValue(Object.keys(obj).length, 2);