Additional unit tests for string comparisons.

test/qtismtest/runtime/tests/AssessmentItemSessionTest.php

@@ -1,10 +1,10 @@
 <?php
 namespace qtismtest\runtime\tests;
 
-use qtism\common\datatypes\QtiFloat;
-
 use qtismtest\QtiSmAssessmentItemTestCase;
 use qtism\common\datatypes\QtiIdentifier;
+use qtism\common\datatypes\QtiFloat;
+use qtism\common\datatypes\QtiString;
 use qtism\data\storage\xml\XmlDocument;
 use qtism\data\SubmissionMode;
 use qtism\common\datatypes\QtiDuration;
@@ -503,4 +503,35 @@ public function testSuspendWithResponses() {
         $this->assertEquals(1., $itemSession['SCORE']->getValue());
         $this->assertEquals(1, $itemSession['numAttempts']->getValue());
     }
+
+    public function testIsRespondedTextEntry() {
+        $doc = new XmlDocument();
+        $doc->load(self::samplesDir() . 'ims/items/2_1/text_entry.xml');
+
+        $itemSession = new AssessmentItemSession($doc->getDocumentComponent());
+        $itemSessionControl = $itemSession->getItemSessionControl();
+        $itemSessionControl->setMaxAttempts(0);
+        $itemSession->beginItemSession();
+
+        // Respond with a null value.
+        $itemSession->beginAttempt();
+        $responses = new State(array(new ResponseVariable('RESPONSE', Cardinality::SINGLE, BaseType::STRING)));
+        $itemSession->endAttempt($responses);
+
+        $this->assertFalse($itemSession->isResponded());
+
+        // Respond with an empty string.
+        $itemSession->beginAttempt();
+        $responses = new State(array(new ResponseVariable('RESPONSE', Cardinality::SINGLE, BaseType::STRING, new QtiString(''))));
+        $itemSession->endAttempt($responses);
+
+        $this->assertFalse($itemSession->isResponded());
+
+        // Respond with a non-empty string.
+        $itemSession->beginAttempt();
+        $responses = new State(array(new ResponseVariable('RESPONSE', Cardinality::SINGLE, BaseType::STRING, new QtiString('York'))));
+        $itemSession->endAttempt($responses);
+
+        $this->assertTrue($itemSession->isResponded());
+    }
 }