Atomics.waitAsync: more guards against false positive test passing (#2678)

test/built-ins/Atomics/waitAsync/null-for-timeout.js

@@ -19,6 +19,7 @@ info: |
 features: [Atomics.waitAsync, SharedArrayBuffer, Symbol, Symbol.toPrimitive, TypedArray, computed-property-names, Atomics, arrow-function]
 flags: [async]
 ---*/
+assert.sameValue(typeof Atomics.waitAsync, 'function');
 
 const i32a = new Int32Array(
   new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)

test/built-ins/Atomics/waitAsync/poisoned-object-for-timeout-throws.js

@@ -19,6 +19,7 @@ info: |
 
 features: [Atomics.waitAsync, SharedArrayBuffer, Symbol, Symbol.toPrimitive, TypedArray, computed-property-names, Atomics]
 ---*/
+assert.sameValue(typeof Atomics.waitAsync, 'function');
 
 const i32a = new Int32Array(
   new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)

test/built-ins/Atomics/waitAsync/returns-result-object-value-is-promise-resolves-to-ok.js

@@ -25,6 +25,7 @@ info: |
 flags: [async]
 features: [Atomics.waitAsync, TypedArray, SharedArrayBuffer, destructuring-binding, Atomics, arrow-function]
 ---*/
+assert.sameValue(typeof Atomics.waitAsync, 'function');
 
 const i32a = new Int32Array(
   new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 8)

test/built-ins/Atomics/waitAsync/returns-result-object-value-is-promise-resolves-to-timed-out.js

@@ -25,6 +25,7 @@ info: |
 flags: [async]
 features: [Atomics.waitAsync, TypedArray, SharedArrayBuffer, destructuring-binding, Atomics, arrow-function]
 ---*/
+assert.sameValue(typeof Atomics.waitAsync, 'function');
 
 const i32a = new Int32Array(
   new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 8)

test/built-ins/Atomics/waitAsync/returns-result-object-value-is-string-not-equal.js

@@ -24,6 +24,7 @@ info: |
 
 features: [Atomics.waitAsync, TypedArray, SharedArrayBuffer, destructuring-binding, Atomics]
 ---*/
+assert.sameValue(typeof Atomics.waitAsync, 'function');
 
 const i32a = new Int32Array(
   new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 8)

test/built-ins/Atomics/waitAsync/returns-result-object-value-is-string-timed-out.js

@@ -24,6 +24,7 @@ info: |
 
 features: [Atomics.waitAsync, TypedArray, SharedArrayBuffer, destructuring-binding, Atomics]
 ---*/
+assert.sameValue(typeof Atomics.waitAsync, 'function');
 
 const i32a = new Int32Array(
   new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 8)

test/built-ins/Atomics/waitAsync/symbol-for-index-throws.js

@@ -31,6 +31,7 @@ info: |
 
 features: [Atomics.waitAsync, SharedArrayBuffer, Symbol, Symbol.toPrimitive, TypedArray, computed-property-names, Atomics]
 ---*/
+assert.sameValue(typeof Atomics.waitAsync, 'function');
 
 const i32a = new Int32Array(
   new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)

test/built-ins/Atomics/waitAsync/validate-arraytype-before-index-coercion.js

@@ -29,6 +29,7 @@ info: |
 
 features: [Atomics.waitAsync, Atomics, TypedArray, SharedArrayBuffer]
 ---*/
+assert.sameValue(typeof Atomics.waitAsync, 'function');
 
 const index = {
   valueOf() {

test/built-ins/Atomics/waitAsync/validate-arraytype-before-timeout-coercion.js

@@ -29,6 +29,8 @@ info: |
 
 features: [Atomics.waitAsync, Atomics, TypedArray, SharedArrayBuffer]
 ---*/
+assert.sameValue(typeof Atomics.waitAsync, 'function');
+
 const timeout = {
   valueOf() {
     throw new Test262Error("timeout coerced");

test/built-ins/Atomics/waitAsync/validate-arraytype-before-value-coercion.js

@@ -29,6 +29,7 @@ info: |
 
 features: [Atomics.waitAsync, Atomics, TypedArray, SharedArrayBuffer]
 ---*/
+assert.sameValue(typeof Atomics.waitAsync, 'function');
 
 const value = {
   valueOf() {