chore: add tests for N-API symbol (#19205)

1 files changed, 49 insertions, 0 deletions

diff --git a/test_napi/symbol_test.js b/test_napi/symbol_test.js
new file mode 100644
index 000000000..00c3edda2
--- /dev/null
+++ b/test_napi/symbol_test.js
@@ -0,0 +1,49 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+import { assert, assertEquals, loadTestLibrary } from "./common.js";
+
+const testSymbol = loadTestLibrary();
+
+Deno.test("napi symbol1", () => {
+  const sym = testSymbol.symbolNew("test");
+  assertEquals(sym.toString(), "Symbol(test)");
+
+  const myObj = {};
+  const fooSym = testSymbol.symbolNew("foo");
+  const otherSym = testSymbol.symbolNew("bar");
+  myObj.foo = "bar";
+  myObj[fooSym] = "baz";
+  myObj[otherSym] = "bing";
+  assertEquals(myObj.foo, "bar");
+  assertEquals(myObj[fooSym], "baz");
+  assertEquals(myObj[otherSym], "bing");
+});
+
+Deno.test("napi symbol2", () => {
+  const sym = testSymbol.symbolNew("test");
+  assertEquals(sym.toString(), "Symbol(test)");
+
+  const myObj = {};
+  const fooSym = testSymbol.symbolNew("foo");
+  myObj.foo = "bar";
+  myObj[fooSym] = "baz";
+
+  assertEquals(Object.keys(myObj), ["foo"]);
+  assertEquals(Object.getOwnPropertyNames(myObj), ["foo"]);
+  assertEquals(Object.getOwnPropertySymbols(myObj), [fooSym]);
+});
+
+Deno.test("napi symbol3", () => {
+  assert(testSymbol.symbolNew() !== testSymbol.symbolNew());
+  assert(testSymbol.symbolNew("foo") !== testSymbol.symbolNew("foo"));
+  assert(testSymbol.symbolNew("foo") !== testSymbol.symbolNew("bar"));
+
+  const foo1 = testSymbol.symbolNew("foo");
+  const foo2 = testSymbol.symbolNew("foo");
+  const object = {
+    [foo1]: 1,
+    [foo2]: 2,
+  };
+  assertEquals(object[foo1], 1);
+  assertEquals(object[foo2], 2);
+});