Add m-esr52 at 52.6.0

1 files changed, 81 insertions, 0 deletions

diff --git a/js/src/jsapi-tests/testSymbol.cpp b/js/src/jsapi-tests/testSymbol.cpp
new file mode 100644
index 000000000..28c6f7a0c
--- /dev/null
+++ b/js/src/jsapi-tests/testSymbol.cpp
@@ -0,0 +1,81 @@
+/* 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 "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)