Date.parse: Test maximum time value range per spec.

test/built-ins/Date/parse/time-value-maximum-range.js

+// Copyright (C) 2018 Andrew Paprocki. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-date.parse
+es6id: 20.3.3.2
+description: >
+  Date.parse return value is limited to specified time value maximum range
+info: |
+  Date.parse ( string )
+
+  parse interprets the resulting String as a date and time; it returns a
+  Number, the UTC time value corresponding to the date and time.
+
+  A Date object contains a Number indicating a particular instant in time to
+  within a millisecond. Such a Number is called a time value.
+
+  The actual range of times supported by ECMAScript Date objects is slightly
+  smaller: exactly -100,000,000 days to 100,000,000 days measured relative to
+  midnight at the beginning of 01 January, 1970 UTC. This gives a range of
+  8,640,000,000,000,000 milliseconds to either side of 01 January, 1970 UTC.
+includes: [propertyHelper.js]
+---*/
+
+const minDateStr = "-271821-04-20T00:00:00.000Z";
+const minDate = new Date(-8640000000000000);
+
+assert.sameValue(minDate.toISOString(), minDateStr, "minDateStr");
+assert.sameValue(Date.parse(minDateStr), minDate.valueOf(), "parse minDateStr");
+
+const maxDateStr = "+275760-09-13T00:00:00.000Z";
+const maxDate = new Date(8640000000000000);
+
+assert.sameValue(maxDate.toISOString(), maxDateStr, "maxDateStr");
+assert.sameValue(Date.parse(maxDateStr), maxDate.valueOf(), "parse maxDateStr");
+
+const belowRange = "-271821-04-19T23:59:59.999Z";
+const aboveRange = "+275760-09-13T00:00:00.001Z";
+
+assert.sameValue(Date.parse(belowRange), NaN, "parse below minimum time value");
+assert.sameValue(Date.parse(aboveRange), NaN, "parse above maximum time value");