Fix failing test

Author: MatiPl01

packages/react-native-reanimated/__tests__/normalizeColor.test.tsx

@@ -304,7 +304,7 @@ describe('Test `normalizeColor` function', () => {
   describe('Test colors a colorName string', () => {
     test.each([
       ['red', 0xff0000ff],
-      ['transparent', 0x00000000],
+      ['transparent', undefined], // Transparent cannot be represented as a number
       ['peachpuff', 0xffdab9ff],
       ['peachPuff', null],
       ['PeachPuff', null],

packages/react-native-reanimated/src/Colors.ts

@@ -168,7 +168,9 @@ export function clampRGBA(RGBA: ParsedColorArray): void {
   }
 }
 
-const names: Record<string, number> = {
+const names: Record<string, number | undefined> = {
+  transparent: undefined,
+
   /* spell-checker: disable */
   // http://www.w3.org/TR/css3-color/#svg-color
   aliceblue: 0xf0f8ffff,
@@ -362,7 +364,7 @@ export const DynamicColorIOSProperties = [
   'highContrastDark',
 ] as const;
 
-export function normalizeColor(color: unknown): number | null {
+export function normalizeColor(color: unknown): number | null | undefined {
   'worklet';
 
   if (typeof color === 'number') {
@@ -383,7 +385,7 @@ export function normalizeColor(color: unknown): number | null {
     return Number.parseInt(match[1] + 'ff', 16) >>> 0;
   }
 
-  if (names[color] !== undefined) {
+  if (color in names) {
     return names[color];
   }
 
@@ -644,12 +646,9 @@ export function processColorInitially(
     colorNumber = color;
   } else {
     const normalizedColor = normalizeColor(color);
-    if (normalizedColor === null || normalizedColor === undefined) {
-      return undefined;
-    }
 
     if (typeof normalizedColor !== 'number') {
-      return null;
+      return normalizedColor;
     }
 
     colorNumber = normalizedColor;

packages/react-native-reanimated/src/common/processors/colors.ts

@@ -62,12 +62,9 @@ function isDynamicColorObject(value: any): boolean {
 
 export function processColor(color: unknown): number | null | undefined {
   let normalizedColor = processColorInitially(color);
-  if (normalizedColor === null || normalizedColor === undefined) {
-    return undefined;
-  }
 
   if (typeof normalizedColor !== 'number') {
-    return null;
+    return normalizedColor;
   }
 
   if (IS_ANDROID) {