From: Lady <redacted>
Date: Mon, 4 Sep 2023 20:57:00 +0000 (-0400)
Subject: Create symbol.js module with getSymbolDescription
X-Git-Url: https://git.ladys.computer/Pisces/commitdiff_plain/ee0f6916f2f56f17bd232f964fec9a4c7ed6ec89?ds=sidebyside;hp=8e591ec68a18c0c4cc355bcde45747546ed59cd9

Create symbol.js module with getSymbolDescription
---

diff --git a/mod.js b/mod.js
index 41bce27..600f619 100644
--- a/mod.js
+++ b/mod.js
@@ -15,4 +15,5 @@ export * from "./iri.js";
 export * from "./numeric.js";
 export * from "./object.js";
 export * from "./string.js";
+export * from "./symbol.js";
 export * from "./value.js";
diff --git a/symbol.js b/symbol.js
new file mode 100644
index 0000000..514b526
--- /dev/null
+++ b/symbol.js
@@ -0,0 +1,22 @@
+// ♓🌟 Piscēs ∷ symbol.js
+// ====================================================================
+//
+// Copyright © 2023 Lady [@ Lady’s Computer].
+//
+// 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 <https://mozilla.org/MPL/2.0/>.
+
+import { makeCallable } from "./function.js";
+import { getOwnPropertyDescriptor } from "./object.js";
+
+/**
+ * Returns the description for the provided symbol.
+ *
+ * ※ This is effectively an alias for the `Symbol::description`
+ * getter.
+ */
+export const getSymbolDescription = makeCallable(
+  getOwnPropertyDescriptor(Symbol.prototype, "description").get,
+  "getSymbolDescription",
+);
diff --git a/symbol.test.js b/symbol.test.js
new file mode 100644
index 0000000..bedcc72
--- /dev/null
+++ b/symbol.test.js
@@ -0,0 +1,50 @@
+// ♓🌟 Piscēs ∷ symbol.test.js
+// ====================================================================
+//
+// Copyright © 2023 Lady [@ Lady’s Computer].
+//
+// 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 <https://mozilla.org/MPL/2.0/>.
+
+import {
+  assertStrictEquals,
+  assertThrows,
+  describe,
+  it,
+} from "./dev-deps.js";
+import { getSymbolDescription } from "./symbol.js";
+
+describe("getSymbolDescription", () => {
+  it("[[Call]] returns undefined when the symbol has no description", () => {
+    assertStrictEquals(getSymbolDescription(Symbol()), undefined);
+  });
+
+  it("[[Call]] returns the empty string when the symbol has an empty description", () => {
+    assertStrictEquals(getSymbolDescription(Symbol("")), "");
+  });
+
+  it("[[Call]] returns the description", () => {
+    assertStrictEquals(
+      getSymbolDescription(Symbol("etaoin")),
+      "etaoin",
+    );
+  });
+
+  it("[[Call]] returns the empty string when the symbol has an empty description", () => {
+    assertStrictEquals(getSymbolDescription(Symbol("")), "");
+  });
+
+  it("[[Construct]] throws an error", () => {
+    assertThrows(() => new getSymbolDescription(Symbol()));
+  });
+
+  describe(".name", () => {
+    it("[[Get]] returns the correct name", () => {
+      assertStrictEquals(
+        getSymbolDescription.name,
+        "getSymbolDescription",
+      );
+    });
+  });
+});