fix tests

Author: Amxx

test/utils/Base64.test.js

@@ -3,7 +3,7 @@ const { expect } = require('chai');
 const Base64 = artifacts.require('$Base64');
 const Base64Dirty = artifacts.require('$Base64Dirty');
 
-contract('Strings', function () {
+contract('Base64', function () {
   beforeEach(async function () {
     this.base64 = await Base64.new();
   });
@@ -32,12 +32,12 @@ contract('Strings', function () {
     });
   });
 
-  it('Encode reads beyond the input buffer into dirty memory', async function () {
+  it.only('Encode reads beyond the input buffer into dirty memory', async function () {
     const mock = await Base64Dirty.new();
-    const buffer32 = web3.utils.soliditySha3('example');
+    const buffer32 = Buffer.from(web3.utils.soliditySha3('example').replace(/0x/, ''), 'hex');
     const buffer31 = buffer32.slice(0, -2);
 
-    expect(await mock.encode(buffer31)).to.equal(Buffer(buffer31).toString('base64'));
-    expect(await mock.encode(buffer32)).to.equal(Buffer(buffer32).toString('base64'));
+    expect(await mock.encode(buffer31)).to.equal(buffer31.toString('base64'));
+    expect(await mock.encode(buffer32)).to.equal(buffer32.toString('base64'));
   });
 });