public void IsSubjectNameValidTest()
{
Assert.AreEqual((false, "Missing subject name!"), SubjectValidation.IsSubjectNameValid(""));
Assert.AreEqual((false, "Invalid subject name, no special or numeric characters allowed!"), SubjectValidation.IsSubjectNameValid("M*aths"));
Assert.AreEqual((false, "Invalid subject name!"), SubjectValidation.IsSubjectNameValid("Design && Technology"));
Assert.AreEqual((true, ""), SubjectValidation.IsSubjectNameValid("Physics"));
}
public void IsSubjectIDValidTest()
{
Assert.AreEqual((false, "Missing subject ID!"), SubjectValidation.IsSubjectIDValid(""));
Assert.AreEqual((false, "Invalid subject ID, no special characters allowed!"), SubjectValidation.IsSubjectIDValid("MAT*3"));
Assert.AreEqual((false, "Invalid subject ID, only a single digit is allowed!"), SubjectValidation.IsSubjectIDValid("PSY43"));
Assert.AreEqual((true, ""), SubjectValidation.IsSubjectIDValid("BIO5B"));
}
public void IsSubjectGradeValidTest()
{
Assert.AreEqual((false, "Missing subject type!"), SubjectValidation.IsSubjectGradeValid("B", ""));
Assert.AreEqual((false, "Missing subject actual grade!"), SubjectValidation.IsSubjectGradeValid("", "actual"));
Assert.AreEqual((false, "Invalid subject type!"), SubjectValidation.IsSubjectGradeValid("A", "attainment"));
Assert.AreEqual((false, "Invalid subject grade!"), SubjectValidation.IsSubjectGradeValid("F", "actual"));
Assert.AreEqual((true, ""), SubjectValidation.IsSubjectGradeValid("A", "actual"));
}
public override void Create(Subject subject)
{
if (SubjectValidation.IsValidSubject(subject))
{
DataAccessProvider.ExecuteNonQuery($"INSERT INTO Subjects (SubjectName, UniversityID) " +
$"values (\'{subject.SubjectName}\', " +
$"{subject.UniversityId})");
}
}
public override void Update(Subject subject)
{
if (SubjectValidation.IsValidSubject(subject) &&
SubjectValidation.IsValidSubjectId(subject.SubjectId))
{
DataAccessProvider.ExecuteNonQuery($"UPDATE Subjects SET " +
$"SubjectName = \'{subject.SubjectName}\', " +
$"UniversityID = {subject.UniversityId} " +
$"WHERE SubjectID = {subject.SubjectId}");
}
}
private void AddSubjectButton_Click(object sender, EventArgs e)
{
var subjectRepository = new SubjectRepository();
var subjectName = addSubjectNameTextBox.Text;
var subject = new Subject(subjectName, _universityId);
if (!SubjectValidation.IsValidSubject(subject))
{
return;
}
subjectRepository.Create(subject);
RefreshForm();
}
// Custom Constructor.
/**
* <summary>This custom constructor method is responsible for creating a Subject object.</summary>
*
* <param name="ID">The ID of the subject.</param>
* <param name="name">The name of the subject.</param>
* <param name="actualGrade">The actual subject grade.</param>
* <param name="expectedGrade">The expected subject grade.</param>
*
* <example>
* <code>Subject sub = new Subject("PHY4", "Physics", "B", "A*");</code>
* This creates a Subject object with "PHY4" as the subject ID, "Physics" as the subject name, "B" as the actual grade and "A*" as the expected grade.</example>
*/
public Subject(string ID, string name, string actualGrade, string expectedGrade)
{
if (!SubjectValidation.IsSubjectIDValid(ID).Item1)
{
// Throws an exception with a message dependent on what invalidates the subject ID.
throw new ArgumentException(SubjectValidation.IsSubjectIDValid(ID).Item2);
}
else
{
GetSubjectID = ID;
}
if (!SubjectValidation.IsSubjectNameValid(name).Item1)
{
// Throws an exception with a message dependent on what invalidates the subject name.
throw new ArgumentException(SubjectValidation.IsSubjectNameValid(name).Item2);
}
else
{
GetSubjectName = name;
}
if (!SubjectValidation.IsSubjectGradeValid(actualGrade, "actual").Item1)
{
// Throws an exception with a message dependent on what invalidates the subject's actual grade.
throw new ArgumentException(SubjectValidation.IsSubjectIDValid(ID).Item2);
}
else
{
GetActualGrade = actualGrade;
}
if (!SubjectValidation.IsSubjectGradeValid(expectedGrade, "expected").Item1)
{
// Throws an exception with a message dependent on what invalidates the subject's expected grade.
throw new ArgumentException(SubjectValidation.IsSubjectIDValid(ID).Item2);
}
else
{
GetExpectedGrade = expectedGrade;
}
}
