fix: fix numberToUUID for values with leading zeroes (#261)

* fix: get correct UUIDs when `value` has leading zeroes * add spec test
capacitor-community · Jan 2, 2022 · b335dcc · b335dcc
1 parent d03096d
commit b335dcc
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Showing 2 changed files with 7 additions and 1 deletion.
diff --git a/src/conversion.spec.ts b/src/conversion.spec.ts
@@ -54,6 +54,12 @@ describe('numberToUUID', () => {
     const result = numberToUUID(value);
     expect(result).toEqual('0000180d-0000-1000-8000-00805f9b34fb');
   });
+
+  it('should also work with leading zeroes', () => {
+    const value = 0x0042;
+    const result = numberToUUID(value);
+    expect(result).toEqual('00000042-0000-1000-8000-00805f9b34fb');
+  });
 });
 
 describe('hexStringToDataView', () => {

diff --git a/src/conversion.ts b/src/conversion.ts
@@ -32,7 +32,7 @@ export function dataViewToText(value: DataView): string {
  * @return string, e.g. '0000180d-0000-1000-8000-00805f9b34fb'
  */
 export function numberToUUID(value: number): string {
-  return `0000${value.toString(16)}-0000-1000-8000-00805f9b34fb`;
+  return `0000${value.toString(16).padStart(4, '0')}-0000-1000-8000-00805f9b34fb`;
 }
 
 export function hexStringToDataView(value: string): DataView {