1 files changed, 48 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/Segmenter/prototype/segment/containing/index-throws.js b/js/src/tests/test262/intl402/Segmenter/prototype/segment/containing/index-throws.js
new file mode 100644
index 0000000000..2948b6a242
--- /dev/null
+++ b/js/src/tests/test262/intl402/Segmenter/prototype/segment/containing/index-throws.js
@@ -0,0 +1,48 @@
+// |reftest| skip-if(!Intl.Segmenter) -- Intl.Segmenter is not enabled unconditionally
+// Copyright 2020 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-%segmentsprototype%.containing
+description: Verifies the cases which the value of index which throws.
+info: |
+    %Segments.prototype%.containing ( index )
+
+    6. Let n be ? ToInteger(index).
+    7. If n < 0 or n ≥ len, return undefined.
+    8. Let startIndex be ! FindBoundary(segmenter, string, n, before).
+
+    ToInteger ( argument )
+    1. Let number be ? ToNumber(argument).
+
+    ToNumber ( argument )
+    Symbol | Throw a TypeError exception.
+    BigInt | Throw a TypeError exception.
+
+features: [Intl.Segmenter]
+---*/
+
+const input = "a b c";
+const granularities = [undefined, "grapheme", "word", "sentence"];
+const index_throws = [
+    // Symbol
+    Symbol(),
+    // BigInt
+    0n,
+    -1n,
+    1n,
+    BigInt(0),
+    BigInt(1),
+    BigInt(-1),
+    BigInt(input.length),
+];
+
+granularities.forEach(
+    function(granularity) {
+      const segmenter = new Intl.Segmenter(undefined, {granularity});
+      const segment = segmenter.segment(input);
+      index_throws.forEach(function(index) {
+        assert.throws(TypeError, () => {segment.containing(index);})
+      });
+    });
+
+reportCompare(0, 0);