added simple math and charts modules

vendor/andileco/eval-math/tests/UserFunctionsTest.php

@@ -0,0 +1,24 @@
+<?php
+/**
+ * @author Serge Rodovnichenko <serge@syrnik.com>
+ * @copyright Serge Rodovnichenko, 2019
+ * @license BSD 2.0
+ */
+
+namespace Andileco\Util\EvalMath\Tests;
+
+
+use PHPUnit\Framework\TestCase;
+use Andileco\Util\EvalMath\EvalMath;
+
+class UserFunctionsTest extends TestCase
+{
+    public function testFunctionsDump()
+    {
+        $e = new EvalMath();
+        $this->assertEmpty($e->funcs());
+
+        $e->e('f(x)=2*x');
+        $this->assertEquals(1, count($e->funcs()));
+    }
+}