Remove ES_NEXT macro (#4915)

- remove all '#JERRY_ESNEXT' macro
- remove 5.1 build profile, update test runner accordingly (Note: all builtins are turn on by default)
- move tests from tests/jerry/esnext into tests/jerry, concatenate files with same names
- add skiplist to some snapshot tests that were supported only in 5.1
- fix doxygen issues that were hidden before (bc. of es.next macro)

Co-authored-by: Martin Negyokru negyokru@inf.u-szeged.hu
JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu

tests/jerry/function-rest-parameter.js

@@ -0,0 +1,96 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+function CheckSyntaxError (str)
+{
+  try {
+    eval (str);
+    assert (false);
+  } catch (e) {
+    assert (e instanceof SyntaxError);
+  }
+
+  /* force the pre-scanner */
+  try {
+    eval ('switch (1) { default: ' + str + '}');
+    assert (false);
+  } catch (e) {
+    assert (e instanceof SyntaxError);
+  }
+}
+
+CheckSyntaxError ('function x (a, b, ...c, d) {}');
+CheckSyntaxError ('function x (... c = 5) {}');
+CheckSyntaxError ('function x (...) {}');
+CheckSyntaxError ('function x (a, a, ...a) {}');
+CheckSyntaxError ('"use strict" function x (...arguments) {}');
+CheckSyntaxError ('var o = { set e (...args) { } }');
+
+rest_params = ['hello', true, 7, {}, [], function () {}];
+
+function f (x, y, ...a) {
+  for (var i = 0; i < a.length; i++) {
+    assert (a[i] == rest_params[i]);
+  }
+  return (x + y) * a.length;
+}
+
+assert (f (1, 2, rest_params[0], rest_params[1], rest_params[2]) === 9);
+assert (f.length === 2);
+
+function g (...a) {
+  return a.reduce (function (accumulator, currentValue) { return accumulator + currentValue });
+}
+
+assert (g (1, 2, 3, 4) === 10);
+
+function h (...arguments) {
+  return arguments.length;
+}
+
+assert (h (1, 2, 3, 4) === 4);
+
+function f2 (a = 1, b = 1, c = 1, ...d) {
+  assert (JSON.stringify (d) === '[]');
+  return a + b + c;
+}
+
+assert (f2 () === 3);
+assert (f2 (2) === 4);
+assert (f2 (2, 3) === 6);
+assert (f2 (2, 3, 4) === 9);
+
+function g2 (a = 5, b = a + 1, ...c) {
+  return a + b + c.length;
+}
+
+assert (g2 () === 11);
+assert (g2 (1) === 3);
+assert (g2 (1, 2) === 3);
+assert (g2 (1, 2, 3) === 4);
+
+function args(a, ...b)
+{
+  assert(a === 1);
+  assert(arguments[0] === 1);
+
+  a = 5;
+
+  assert(a === 5);
+  assert(arguments[0] === 1);
+
+  assert(arguments[1] === 2);
+  assert(b[0] === 2)
+}
+args(1, 2);