test: fixed test cases

Author: mitulgolakiya

tests/Helpers/HelpersTest.php

@@ -2,7 +2,9 @@
 
 namespace Tests\Helpers;
 
-class HelpersTest extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+class HelpersTest extends TestCase
 {
     public function test_model_name_from_table_name()
     {

tests/Utils/GeneratorFieldsInputUtilTest.php

@@ -3,8 +3,9 @@
 namespace Tests;
 
 use InfyOm\Generator\Utils\GeneratorFieldsInputUtil;
+use PHPUnit\Framework\TestCase;
 
-class GeneratorFieldsInputUtilTest extends \PHPUnit_Framework_TestCase
+class GeneratorFieldsInputUtilTest extends TestCase
 {
     public function testValidateFieldInput()
     {

tests/Utils/ResponseUtilTest.php

@@ -3,9 +3,9 @@
 namespace Tests\Utils;
 
 use InfyOm\Generator\Utils\ResponseUtil;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
-class ResponseUtilTest extends PHPUnit_Framework_TestCase
+class ResponseUtilTest extends TestCase
 {
     public function testMakeResponse()
     {