Eliminate false positives: Array.prototype.flat, Array.prototype.flatMap

test/built-ins/Array/prototype/flat/non-object-ctor-throws.js

@@ -8,6 +8,8 @@ description: >
 features: [Array.prototype.flat]
 ---*/
 
+assert.sameValue(typeof Array.prototype.flat, 'function');
+
 var a = [];
 a.constructor = null;
 assert.throws(TypeError, function() {

test/built-ins/Array/prototype/flat/null-undefined-input-throws.js

@@ -7,6 +7,8 @@ description: >
 features: [Array.prototype.flat]
 ---*/
 
+assert.sameValue(typeof Array.prototype.flat, 'function');
+
 assert.throws(TypeError, function() {
   [].flat.call(null);
 }, 'null value');

test/built-ins/Array/prototype/flat/symbol-object-create-null-depth-throws.js

@@ -7,6 +7,8 @@ description: >
 features: [Array.prototype.flat]
 ---*/
 
+assert.sameValue(typeof Array.prototype.flat, 'function');
+
 assert.throws(TypeError, function() {
   [].flat(Symbol());
 }, 'symbol value');

test/built-ins/Array/prototype/flatMap/non-callable-argument-throws.js

@@ -7,6 +7,8 @@ description: >
 features: [Array.prototype.flatMap]
 ---*/
 
+assert(Array.prototype.flatMap);
+
 assert.throws(TypeError, function() {
   [].flatMap({});
 }, 'non callable argument');

test/built-ins/Array/prototype/flatMap/non-object-ctor-throws.js

@@ -8,6 +8,8 @@ description: >
 features: [Array.prototype.flatMap]
 ---*/
 
+assert.sameValue(typeof Array.prototype.flatMap, 'function');
+
 var a = [];
 a.constructor = null;
 assert.throws(TypeError, function() {

test/built-ins/Array/prototype/flatMap/null-undefined-input-throws.js

@@ -7,6 +7,8 @@ description: >
 features: [Array.prototype.flatMap]
 ---*/
 
+assert.sameValue(typeof Array.prototype.flatMap, 'function');
+
 assert.throws(TypeError, function() {
   [].flatMap.call(null);
 }, 'null value');

test/built-ins/Array/prototype/flatMap/proxy-access-count.js

@@ -17,10 +17,12 @@ info: |
     b. Let exists be ? HasProperty(source, P).
     c. If exists is true, then
       i. Let element be ? Get(source, P).
-features: [Array.prototype.flat]
+features: [Array.prototype.flatMap]
 includes: [compareArray.js]
 ---*/
 
+assert.sameValue(typeof Array.prototype.flatMap, 'function');
+
 const getCalls = [], hasCalls = [];
 const handler = {
   get : function (t, p, r) { getCalls.push(p); return Reflect.get(t, p, r); },