/**
* Test "testselectALesson()" in Assignments.class.inc
*
* A *description*, that can span multiple lines, to go _in-depth_ into the details of this element
* and to provide some background information or textual references.
*
* @return void
*/
public function testselectALesson()
{
// Construct a fake student. Populate with three lessons.
// Run about 100 selections and test that a lesson is returned in the
// correct ratio.
$this->testbuildArray();
// Reset myArray to origninal values.
$classInstance = new tutor\src\classes\AssignmentsClass();
$tempStudent = 'abcdefg';
$classInstance->delRowsByStudentId($tempStudent);
// Insure no previous lessons for this student.
$this->myArray['tA_S_ID'] = $tempStudent;
$this->myArray['tA_PercentTime'] = 120;
$this->myArray['tG_AssignmentName'] = 'abc';
$classInstance->insertRecord($this->myArray);
$this->myArray['tA_PercentTime'] = 137;
$this->myArray['tG_AssignmentName'] = 'def';
$classInstance->insertRecord($this->myArray);
$this->myArray['tA_PercentTime'] = 20;
$this->myArray['tG_AssignmentName'] = 'ghi';
$classInstance->insertRecord($this->myArray);
// We should now have 3 assignments for this student. Let's check.
$studentAssignmentsArray = $classInstance->getCurrentStudentAssignmentsInAnArray($tempStudent);
$this->assertTrue(count($studentAssignmentsArray) === 3);
$this->assertTrue($classInstance->getSumOfAssignedTimeFromArray($studentAssignmentsArray, time()) === 277);
$allLessonArray = $classInstance->getCurrentStudentAssignmentsInAnArray($tempStudent);
$this->assertTrue(is_array($allLessonArray));
$this->assertTrue(count($allLessonArray) == 3);
$totalAbc = 0;
$totalDef = 0;
$totalGhi = 0;
for ($i = 0; $i < 100; $i++) {
// Trying to select a lesson many times and
// Checking for frequency.
$lastLessonId = '';
$selectedLesson = $classInstance->selectALesson($allLessonArray, $lastLessonId);
// Should return array containing one lesson.
if (is_array($selectedLesson) === TRUE) {
if ($selectedLesson['tG_AssignmentName'] === 'abc') {
$totalAbc++;
}
if ($selectedLesson['tG_AssignmentName'] === 'def') {
$totalDef++;
}
if ($selectedLesson['tG_AssignmentName'] === 'ghi') {
$totalGhi++;
}
} else {
die(__LINE__ . ' acTest should have been an array.');
}
}
//end for
$this->assertTrue($totalAbc > 30);
$this->assertTrue($totalDef > 30);
$this->assertTrue($totalAbc > 1);
// Clean Up.
$classInstance->delRowsByStudentId($tempStudent);
$classInstance->delRowsByStudentId($this->myArray['tA_S_ID']);
// Insure no previous lessons for this student.
$classInstance->delRowsByStudentId('abcdefg');
}