Test hex conversion functions

src/test_utils/nim_waku.spec.ts

@@ -1,6 +1,6 @@
 import test from 'ava';
 
-import { argsToArray, mergeArguments } from './nim_waku';
+import { argsToArray, bufToHex, mergeArguments, strToHex } from './nim_waku';
 
 test('Default arguments are correct', (t) => {
   const args = mergeArguments({});
@@ -36,3 +36,44 @@ test('Passing staticnode argument return default + static node', (t) => {
 
   t.deepEqual(actual, expected);
 });
+
+test('Convert utf-8 string to hex', (t) => {
+  const str = 'This is an utf-8 string.';
+  const expected = '0x5468697320697320616e207574662d3820737472696e672e';
+
+  const actual = strToHex(str);
+  t.deepEqual(actual, expected);
+});
+
+test('Convert buffer to hex', (t) => {
+  const buf = Uint8Array.from([
+    0x54,
+    0x68,
+    0x69,
+    0x73,
+    0x20,
+    0x69,
+    0x73,
+    0x20,
+    0x61,
+    0x6e,
+    0x20,
+    0x75,
+    0x74,
+    0x66,
+    0x2d,
+    0x38,
+    0x20,
+    0x73,
+    0x74,
+    0x72,
+    0x69,
+    0x6e,
+    0x67,
+    0x2e,
+  ]);
+  const expected = '0x5468697320697320616e207574662d3820737472696e672e';
+
+  const actual = bufToHex(buf);
+  t.deepEqual(actual, expected);
+});

src/test_utils/nim_waku.ts

@@ -178,14 +178,13 @@ export function mergeArguments(args: Args): Args {
   return res;
 }
 
-// TODO: Test this
-function strToHex(str: string): string {
+export function strToHex(str: string): string {
   let hex: string;
   try {
     hex = unescape(encodeURIComponent(str))
       .split('')
       .map(function (v) {
-        return v.charCodeAt(0).toString(16).toUpperCase();
+        return v.charCodeAt(0).toString(16);
       })
       .join('');
   } catch (e) {
@@ -195,9 +194,11 @@ function strToHex(str: string): string {
   return '0x' + hex;
 }
 
-// TODO: Test this
-function bufToHex(buffer: Uint8Array) {
-  return Array.prototype.map
-    .call(buffer, (x) => ('00' + x.toString(16)).slice(-2))
-    .join('');
+export function bufToHex(buffer: Uint8Array) {
+  return (
+    '0x' +
+    Array.prototype.map
+      .call(buffer, (x) => ('00' + x.toString(16)).slice(-2))
+      .join('')
+  );
 }