1 files changed, 79 insertions, 0 deletions
diff --git a/js/src/jsapi-tests/testSymbol.cpp b/js/src/jsapi-tests/testSymbol.cpp
new file mode 100644
index 0000000000..effc416c2d
--- /dev/null
+++ b/js/src/jsapi-tests/testSymbol.cpp
@@ -0,0 +1,79 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "js/Symbol.h"
+#include "jsapi-tests/tests.h"
+
+BEGIN_TEST(testSymbol_New) {
+  using namespace JS;
+
+  RootedString desc(cx, nullptr);
+  RootedSymbol sym1(cx);
+  CHECK(sym1 = NewSymbol(cx, desc));
+  CHECK_NULL(GetSymbolDescription(sym1));
+  RootedValue v(cx, SymbolValue(sym1));
+  CHECK_EQUAL(JS_TypeOfValue(cx, v), JSTYPE_SYMBOL);
+
+  RootedSymbol sym2(cx);
+  CHECK(sym2 = NewSymbol(cx, desc));
+  CHECK(sym1 != sym2);
+
+  CHECK(desc = JS_NewStringCopyZ(cx, "ponies"));
+  CHECK(sym2 = NewSymbol(cx, desc));
+  CHECK_SAME(StringValue(GetSymbolDescription(sym2)), StringValue(desc));
+
+  return true;
+}
+END_TEST(testSymbol_New)
+
+BEGIN_TEST(testSymbol_GetSymbolFor) {
+  using namespace JS;
+
+  RootedString desc(cx, JS_NewStringCopyZ(cx, "ponies"));
+  CHECK(desc);
+  RootedSymbol sym1(cx);
+  CHECK(sym1 = GetSymbolFor(cx, desc));
+  CHECK_SAME(StringValue(GetSymbolDescription(sym1)), StringValue(desc));
+
+  // Calling JS::GetSymbolFor again with the same arguments produces the
+  // same Symbol.
+  RootedSymbol sym2(cx);
+  CHECK(sym2 = GetSymbolFor(cx, desc));
+  CHECK_EQUAL(sym1, sym2);
+
+  // Passing a new but equal string also produces the same Symbol.
+  CHECK(desc = JS_NewStringCopyZ(cx, "ponies"));
+  CHECK(sym2 = GetSymbolFor(cx, desc));
+  CHECK_EQUAL(sym1, sym2);
+
+  // But SymbolNew always produces a new distinct Symbol.
+  CHECK(sym2 = NewSymbol(cx, desc));
+  CHECK(sym2 != sym1);
+
+  return true;
+}
+END_TEST(testSymbol_GetSymbolFor)
+
+BEGIN_TEST(testSymbol_GetWellKnownSymbol) {
+  using namespace JS;
+
+  Rooted<Symbol*> sym1(cx);
+  CHECK(sym1 = GetWellKnownSymbol(cx, SymbolCode::iterator));
+  RootedValue v(cx);
+  EVAL("Symbol.iterator", &v);
+  CHECK_SAME(v, SymbolValue(sym1));
+
+  // The description of a well-known symbol is as specified.
+  RootedString desc(cx);
+  CHECK(desc = JS_NewStringCopyZ(cx, "Symbol.iterator"));
+  CHECK_SAME(StringValue(GetSymbolDescription(sym1)), StringValue(desc));
+
+  // GetSymbolFor never returns a well-known symbol.
+  Rooted<Symbol*> sym2(cx);
+  CHECK(sym2 = GetSymbolFor(cx, desc));
+  CHECK(sym2 != sym1);
+
+  return true;
+}
+END_TEST(testSymbol_GetWellKnownSymbol)