Add Array#concat non-configurable property tests

test/built-ins/Array/prototype/concat/create-species-with-non-configurable-property-spreadable.js

@@ -0,0 +1,45 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object's "0" is non-configurable, argument is spreadable)
+info: |
+  Array.prototype.concat ( ...arguments )
+
+  [...]
+  5. Repeat, while items is not empty
+    [...]
+    c. If spreadable is true, then
+      [...]
+      iv. Repeat, while k < len
+        [...]
+        3. If exists is true, then
+          [...]
+          b. Perform ? CreateDataPropertyOrThrow(A, ! ToString(n), subElement).
+    [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    writable: true,
+    configurable: false,
+  });
+};
+
+var arr = [];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.concat([1]);
+});

test/built-ins/Array/prototype/concat/create-species-with-non-configurable-property.js

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+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object's "0" is non-configurable, argument is non-spreadable)
+info: |
+  Array.prototype.concat ( ...arguments )
+
+  [...]
+  5. Repeat, while items is not empty
+    [...]
+    c. If spreadable is true, then
+      [...]
+    d. Else,
+      [...]
+      iii. Perform ? CreateDataPropertyOrThrow(A, ! ToString(n), E).
+    [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    set: function(_value) {},
+    configurable: false,
+  });
+};
+
+var arr = [];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.concat(1);
+});