Improve specifity of test methods.

module/VuFindDevTools/tests/unit-tests/src/VuFindTest/Controller/DevtoolsControllerTest.php

@@ -72,19 +72,19 @@ public function testLanguageAction()
         $en = $result['details']['en'];
 
         // Did we load help files correctly?
-        $this->assertTrue(count($en['helpFiles']) >= 4);
+        $this->assertGreaterThan(3, count($en['helpFiles']));
         $this->assertTrue(in_array('search.phtml', $en['helpFiles']));
 
         // Did we put the object in the right place?
         $this->assertEquals(TextDomain::class, get_class($en['object']));
 
         // Did the @parent_ini macro get stripped correctly?
-        $this->assertFalse(isset($result['details']['en-gb']['object']['@parent_ini']));
+        $this->assertArrayNotHasKey('@parent_ini', $result['details']['en-gb']['object']);
 
         // Did the native.ini file get properly ignored?
-        $this->assertFalse(isset($result['details']['native']));
+        $this->assertArrayNotHasKey('native', $result['details']);
 
         // Did the aliases.ini file get properly ignored?
-        $this->assertFalse(isset($result['details']['aliases']));
+        $this->assertArrayNotHasKey('aliases', $result['details']);
     }
 }