Support BigInt to number conversion using Number constructor (#4121)

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

tests/jerry/es.next/bigint9.js

@@ -0,0 +1,42 @@
+/* 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.
+ */
+
+assert(Number(0n) === 0)
+assert(Number(1n) === 1)
+assert(Number(2n) === 2)
+assert(Number(0x100n) === 256)
+assert(Number(-1n) === -1)
+assert(Number(-2n) === -2)
+assert(Number(-0x100n) === -256)
+
+assert(Number(0x1fffffffffffffn) === 0x1fffffffffffff)
+assert(Number(-0x3fffffffffffffn) === -0x40000000000000)
+assert(Number(1000n ** 1000n) === Number.POSITIVE_INFINITY)
+assert(Number((-1000n) ** 1001n) === Number.NEGATIVE_INFINITY)
+
+// Rounding to even
+
+assert(Number(0x80000000000004n) === 0x80000000000000)
+assert(Number(0x80000000000008n) === 0x80000000000008)
+assert(Number(0x8000000000000cn) === 0x80000000000010)
+assert(Number(0x80000000000004n) === 0x80000000000000)
+assert(Number(0x80000000000006n) === 0x80000000000008)
+assert(Number(0x800000000000f400000000000000000000000000000000n) === 0x800000000000f000000000000000000000000000000000)
+assert(Number(0x800000000000f400000000000000000000000000000001n) === 0x800000000000f800000000000000000000000000000000)
+
+// Construct
+
+assert((new Number(0n)).valueOf() === 0)
+assert((new Number(-3256n)).valueOf() == -3256)

tests/test262-esnext-excludelist.xml

@@ -658,7 +658,6 @@
   <test id="built-ins/BigInt/asUintN/order-of-steps.js"><reason></reason></test>
   <test id="built-ins/BigInt/constructor-empty-string.js"><reason></reason></test>
   <test id="built-ins/BigInt/constructor-trailing-leading-spaces.js"><reason></reason></test>
-  <test id="built-ins/BigInt/prototype/toString/a-z.js"><reason></reason></test>
   <test id="built-ins/BigInt/prototype/toString/length.js"><reason></reason></test>
   <test id="built-ins/BigInt/prototype/valueOf/cross-realm.js"><reason></reason></test>
   <test id="built-ins/Boolean/proto-from-ctor-realm.js"><reason></reason></test>
@@ -1062,7 +1061,6 @@
   <test id="built-ins/NativeErrors/SyntaxError/proto-from-ctor-realm.js"><reason></reason></test>
   <test id="built-ins/NativeErrors/TypeError/proto-from-ctor-realm.js"><reason></reason></test>
   <test id="built-ins/NativeErrors/URIError/proto-from-ctor-realm.js"><reason></reason></test>
-  <test id="built-ins/Number/bigint-conversion.js"><reason></reason></test>
   <test id="built-ins/Number/proto-from-ctor-realm.js"><reason></reason></test>
   <test id="built-ins/Number/prototype/toExponential/return-values.js"><reason></reason></test>
   <test id="built-ins/Number/prototype/toFixed/exactness.js"><reason></reason></test>