[corelib_2] fix bigint_from_test for web platforms

rakudrama · commit-bot@chromium.org · commit 803658a6d876 · 2019-07-09T18:25:52.000Z
Change-Id: Ib97814ba6b30822296c24026ddcd09f119508ed7 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/108422 Reviewed-by: Lasse R.H. Nielsen <lrn@google.com> Commit-Queue: Stephen Adams <sra@google.com>
diff --git a/tests/corelib_2/bigint_from_test.dart b/tests/corelib_2/bigint_from_test.dart
@@ -64,6 +64,12 @@ main() {
 testInt(int n) {
   var bigint = new BigInt.from(n);
   Expect.equals(n, bigint.toInt());
+
+  // If the integers are inexact (e.g. > 2^53 when represented by doubles as
+  // when compiled to JavaScript numbers) then the 'toString' might be rounded
+  // to the nearest equivalent 'nicer looking' number.
+  if (n == n + 1 || n == n - 1) return;
+
   Expect.equals("$n", "$bigint");
 }
 
