Minor refactorings

src/lwc/signals/__tests__/signal-identity.test.ts

@@ -1,38 +1,38 @@
-import { $signal, isASignal } from "../core";
+import { $signal, isSignal } from "../core";
 
 describe("isASignal", () => {
   test("checks that a value is a signal", () => {
     const signal = $signal(0);
-    expect(isASignal(signal)).toBe(true);
+    expect(isSignal(signal)).toBe(true);
   });
 
   test("checks that a computed is a signal", () => {
     const signal = $signal(0);
     const computed = $signal(() => signal.value);
-    expect(isASignal(computed)).toBe(true);
+    expect(isSignal(computed)).toBe(true);
   });
 
   test("checks that a value is not a signal", () => {
-    expect(isASignal(0)).toBe(false);
+    expect(isSignal(0)).toBe(false);
   });
 
   test("checks that a function is not a signal", () => {
-    expect(isASignal(() => {})).toBe(false);
+    expect(isSignal(() => {})).toBe(false);
   });
 
   test("checks that an object is not a signal", () => {
-    expect(isASignal({})).toBe(false);
+    expect(isSignal({})).toBe(false);
   });
 
   test("checks that an array is not a signal", () => {
-    expect(isASignal([])).toBe(false);
+    expect(isSignal([])).toBe(false);
   });
 
   test("checks that undefined is not a signal", () => {
-    expect(isASignal(undefined)).toBe(false);
+    expect(isSignal(undefined)).toBe(false);
   });
 
   test("checks that null is not a signal", () => {
-    expect(isASignal(null)).toBe(false);
+    expect(isSignal(null)).toBe(false);
   });
 });

src/lwc/signals/core.ts

@@ -246,6 +246,8 @@ class TrackedState<T> implements TrackableState<T> {
   }
 }
 
+const SIGNAL_OBJECT_BRAND = Symbol.for("lwc-signals");
+
 /**
  * Creates a new signal with the provided value. A signal is a reactive
  * primitive that can be used to store and update values. Signals can be
@@ -331,7 +333,7 @@ function $signal<T>(
           setter(newValue);
         }
       },
-      brand: Symbol.for("lwc-signals"),
+      brand: SIGNAL_OBJECT_BRAND,
       readOnly: {
         get value() {
           return getter();
@@ -534,8 +536,8 @@ function $resource<ReturnType, Params>(
   };
 }
 
-function isASignal(anything: unknown): anything is Signal<unknown> {
-  return !!anything && (anything as Signal<unknown>).brand === Symbol.for("lwc-signals");
+function isSignal(anything: unknown): anything is Signal<unknown> {
+  return !!anything && (anything as Signal<unknown>).brand === SIGNAL_OBJECT_BRAND;
 }
 
-export { $signal, $effect, $computed, $resource, isASignal };
+export { $signal, $effect, $computed, $resource, isSignal };