Add failing test case to investigate

Author: DOBEN

packages/sdk/test/ci/plt/TokenAmount.test.ts

@@ -12,6 +12,9 @@ describe('PLT TokenAmount', () => {
         expect(TokenAmount.fromDecimal('15.002456687544126548', 18)).toEqual(
             TokenAmount.create(15002456687544126548n, 18)
         );
+        expect(TokenAmount.fromDecimal(MAX_U64, 0)).toEqual(
+            TokenAmount.create(MAX_U64, 0)
+        );
     });
 
     test('Parses large decimal values correctly', () => {
@@ -35,6 +38,11 @@ describe('PLT TokenAmount', () => {
         expect(() => TokenAmount.fromDecimal(99999999999999999999999999n, 1)).toThrow(
             TokenAmount.Err.exceedsMaxValue()
         );
+
+    });
+
+    test('Token amounts with more decimals than specified throws', () => {
+        expect(() => TokenAmount.fromDecimal('1.000003', 0)).toThrow('The amount has more decimal places than the specified decimals.');
     });
 
     test('Returns expected amount', () => {