1 files changed, 48 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/external-strings.js b/js/src/jit-test/tests/basic/external-strings.js
new file mode 100644
index 0000000000..fd5faa27ef
--- /dev/null
+++ b/js/src/jit-test/tests/basic/external-strings.js
@@ -0,0 +1,48 @@
+assertEq(newString("", {external: true}), "");
+assertEq(newString("abc", {external: true}), "abc");
+assertEq(newString("abc\0def\u1234", {external: true}), "abc\0def\u1234");
+
+var o = {foo: 2, "foo\0": 4};
+var ext = newString("foo", {external: true});
+assertEq(o[ext], 2);
+var ext2 = newString("foo\0", {external: true});
+assertEq(o[ext2], 4);
+
+eval(newString("assertEq(1, 1)", {external: true}));
+
+// Make sure ensureLinearString does the right thing for external strings.
+ext = newString("abc\0defg\0", {external: true});
+assertEq(ensureLinearString(ext), "abc\0defg\0");
+assertEq(ensureLinearString(ext), "abc\0defg\0");
+
+for (var s of representativeStringArray())
+    assertEq(ensureLinearString(s), s);
+
+for (var s of representativeStringArray())
+    assertEq(newString(s, {external: true}), s);
+
+function testQuote() {
+    for (var data of [["abc", "abc"],
+		      ["abc\t", "abc\\t"],
+		      ["abc\t\t\0", "abc\\t\\t\\x00"],
+		      ["abc\\def", "abc\\\\def"]]) {
+	try {
+	    assertEq(newString(data[0], {external: true}), false);
+	} catch(e) {
+	    assertEq(e.toString().includes('got "' + data[1] + '",'), true)
+	}
+    }
+}
+testQuote();
+
+function testMaybeExternal() {
+    for (var i=0; i<10; i++) {
+        var s = "abcdef4321" + i;
+        assertEq(newString(s, {maybeExternal: true}), s);
+        if ((i % 2) === 0)
+            assertEq(ensureLinearString(newString(s, {maybeExternal: true})), s);
+    }
+}
+testMaybeExternal();
+gc();
+testMaybeExternal();