/**
* Test "testselectOneLesson()" in Assignments.class.inc.
*/
public function testselectOneLesson()
{
// Construct a fake student. Populate with three lessons.
// Run about 100 selections and test that a lesson is returned in the
// correct ratio.
$this->resetMyArray();
// Reset myArray to origninal values.
$ac_class_instance = new AssignmentsClass();
$temp_student_id = 'abcdefg';
$ac_class_instance->delRowsByStudentId($temp_student_id);
// Insure no previous lessons for this student.
$this->myArray['tA_S_ID'] = $temp_student_id;
$this->myArray['tA_PercentTime'] = 120;
$this->myArray['tG_AssignmentName'] = 'abc';
$ac_class_instance->insertRecord($this->myArray);
$this->myArray['tA_PercentTime'] = 137;
$this->myArray['tG_AssignmentName'] = 'def';
$ac_class_instance->insertRecord($this->myArray);
$this->myArray['tA_PercentTime'] = 20;
$this->myArray['tG_AssignmentName'] = 'ghi';
$ac_class_instance->insertRecord($this->myArray);
// We should now have 3 assignments for this student. Let's check.
$student_assignments_array = $ac_class_instance->getCurrentStudentAssignmentsInAnArray($temp_student_id);
$this->assertTrue(count($student_assignments_array) === 3);
$this->assertTrue($ac_class_instance->getSumOfAssignedTimeFromArray($student_assignments_array, time()) === 277);
$all_lesson_array = $ac_class_instance->getCurrentStudentAssignmentsInAnArray($temp_student_id);
$this->assertTrue(is_array($all_lesson_array));
$this->assertTrue(count($all_lesson_array) == 3);
$total_abc = 0;
$total_def = 0;
$total_ghi = 0;
for ($i = 0; $i < 100; $i++) {
// Trying to select a lesson many times and
// Checking for frequency.
$last_lesson_id = '';
$selected_lesson = $ac_class_instance->selectOneLesson($all_lesson_array, $last_lesson_id);
// Should return array containing one lesson.
if (is_array($selected_lesson) === TRUE) {
if ($selected_lesson['tG_AssignmentName'] === 'abc') {
$total_abc++;
}
if ($selected_lesson['tG_AssignmentName'] === 'def') {
$total_def++;
}
if ($selected_lesson['tG_AssignmentName'] === 'ghi') {
$total_ghi++;
}
} else {
die(__LINE__ . ' acTest should have been an array.');
}
}
//end for
$this->assertTrue($total_abc > 30);
$this->assertTrue($total_def > 30);
$this->assertTrue($total_abc > 1);
// Clean Up.
$ac_class_instance->delRowsByStudentId($temp_student_id);
$ac_class_instance->delRowsByStudentId($this->myArray['tA_S_ID']);
// Insure no previous lessons for this student.
$ac_class_instance->delRowsByStudentId('abcdefg');
$this->resetMyArray();
}
