Create test file which inclues handful of unit tests for "encodeFunct…

…ion" function

test/encodeFunction.test.ts

@@ -0,0 +1,42 @@
+import { expect, test } from 'vitest';
+import { encodeFunction } from '../src/utils/crypto';
+
+test('Function encoding with no parameters', () => {
+  expect(encodeFunction('foo')).toEqual('0xc2985578');
+});
+
+test('Function encoding with [boolean=true]', () => {
+  expect(encodeFunction('foo', 'bool', 'true')).toEqual(
+    '0x455575780000000000000000000000000000000000000000000000000000000000000001'
+  );
+});
+
+// test('Function encoding with [boolean=false]', () => {
+//   expect(encodeFunction('foo', 'bool', 'false')).toEqual(
+//     '0x455575780000000000000000000000000000000000000000000000000000000000000000'
+//   );
+// });
+
+test('Function encoding with [uint=0]', () => {
+  expect(encodeFunction('foo', 'uint', '0')).toEqual(
+    '0x2fbebd380000000000000000000000000000000000000000000000000000000000000000'
+  );
+});
+
+test('Function encoding with [uint256=0]', () => {
+  expect(encodeFunction('foo', 'uint256', '0')).toEqual(
+    '0x2fbebd380000000000000000000000000000000000000000000000000000000000000000'
+  );
+});
+
+test('Function encoding with [uint8=0]', () => {
+  expect(encodeFunction('foo', 'uint8', '0')).toEqual(
+    '0x11602fb30000000000000000000000000000000000000000000000000000000000000000'
+  );
+});
+
+test('Function encoding with [uint8=0]', () => {
+  expect(encodeFunction('foo', 'uint8', '100')).toEqual(
+    '0x11602fb30000000000000000000000000000000000000000000000000000000000000064'
+  );
+});