Implement String startsWith/includes/endsWith (#2926)

Co-authored-by: Tamas Keri tkeri@inf.u-szeged.hu
JerryScript-DCO-1.0-Signed-off-by: Daniella Barsony bella@inf.u-szeged.hu

tests/jerry/es2015/string-prototype-endswith.js

@@ -0,0 +1,63 @@
+// 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.
+
+var x = "Dancer of the Boreal Valley";
+assert (x.endsWith ("Valley"));
+assert (x.endsWith ("Boreal", 20));
+assert (x.endsWith ("Dancer", 6));
+assert (x.endsWith (""));
+assert (x.endsWith ([]));
+
+var y = "Lalafell";
+assert (y.endsWith ("Lala") === false);
+assert (y.endsWith ("fell", 2) === false);
+assert (y.endsWith ("Final", "Fantasy") === false);
+assert (y.endsWith ("Hydaelyn", 30) === false);
+assert (y.endsWith (undefined) === false);
+
+assert(String.prototype.endsWith.call (5) === false);
+
+var test_obj = {toString: function() { return "A realm reborn"; } };
+test_obj.endsWith = String.prototype.endsWith;
+assert (test_obj.endsWith ("reborn") === true);
+assert (test_obj.endsWith ("realm") === false);
+
+try {
+  String.prototype.endsWith.call (Symbol());
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}
+
+try {
+  String.prototype.endsWith.call (undefined);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}
+
+try {
+  String.prototype.endsWith.call (null);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}
+
+var z = /[/]/;
+try {
+  y.endsWith (z);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}

tests/jerry/es2015/string-prototype-includes.js

@@ -0,0 +1,62 @@
+// 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.
+
+var x = "Good King Moggle Mog XII";
+assert (x.includes ("Moggle"));
+assert (x.includes ("Moggle Mog", 3));
+assert (x.includes (""));
+assert (x.includes ([]));
+
+var y = "Nidhogg's Rage";
+assert (y.includes ("Dragon") === false);
+assert (y.includes ("Rage", 11) === false);
+assert (y.includes ("Final", "Fantasy") === false);
+assert (y.includes ("Hydaelyn", 30) === false);
+assert (y.includes (undefined) === false);
+
+assert(String.prototype.includes.call (5) === false);
+
+var test_obj = {toString: function() { return "The world of Eorzea"; } };
+test_obj.includes = String.prototype.includes;
+assert (test_obj.includes ("Eorzea") === true);
+assert (test_obj.includes ("Viera") === false);
+
+try {
+  String.prototype.includes.call (Symbol());
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}
+
+try {
+  String.prototype.includes.call (undefined);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}
+
+try {
+  String.prototype.includes.call (null);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}
+
+var z = /[/]/;
+try {
+  y.includes (z);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}

tests/jerry/es2015/string-prototype-startswith.js

@@ -0,0 +1,53 @@
+// 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.
+
+var x = "My cat is awesome";
+assert (x.startsWith ("My"));
+assert (x.startsWith ("cat", 3));
+assert (x.startsWith (""));
+assert (x.startsWith ([]));
+
+assert (x.startsWith ("doggo") === false);
+assert (x.startsWith ("awesome", 2) === false);
+assert (x.startsWith ("awesome", "oi") === false);
+assert (x.startsWith ("kitten", 30) === false);
+assert (x.startsWith (undefined) === false);
+assert(String.prototype.startsWith.call (5) === false);
+
+var test_obj = {toString: function() { return "The world of Eorzea"; } };
+test_obj.startsWith = String.prototype.startsWith;
+assert (test_obj.startsWith ("The") === true);
+assert (test_obj.startsWith ("Viera") === false);
+
+try {
+  String.prototype.startsWith.call (Symbol());
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}
+
+try {
+  String.prototype.startsWith.call (undefined);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}
+
+y = /[/]/;
+try {
+  x.startsWith (y);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}