WIP pass the failed tests.

common/lib/Lexer.test.js

@@ -0,0 +1,12 @@
+import { expect } from '~/testInit';
+import { Lexer } from '@/lib/LogicEvaluation/Lexer';
+
+describe('Lexer', () => {
+
+  it('Should retrieve tokens of the expression.', () => {
+    const lexer = new Lexer('(1 && 2) || (2 || 3)');
+
+    const tokens = lexer.getTokens();
+    expect(tokens.length).equals(11);
+  });
+});