| public static CreateUniqueConstraint ( ) : DataTable | ||
| Результат | DataTable | |
public void RemoveAt_Integer()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
dt.Constraints.RemoveAt(0);
Assert.Equal(0, dt.Constraints.Count);
dt = DataProvider.CreateUniqueConstraint();
Constraint con = new UniqueConstraint(dt.Columns["String1"], false);
dt.Constraints[0].ConstraintName = "constraint1";
con.ConstraintName = "constraint2";
dt.Constraints.Add(con);
dt.Constraints.RemoveAt(0);
Assert.Equal(1, dt.Constraints.Count);
Assert.Equal("constraint2", dt.Constraints[0].ConstraintName);
dt = DataProvider.CreateUniqueConstraint();
dt.Constraints.CollectionChanged += new CollectionChangeEventHandler(Constraints_CollectionChanged);
dt.Constraints.RemoveAt(0);
Assert.Equal(true, _collectionChanged);
ArrayList arr = new ArrayList(1);
arr.Add(new IndexOutOfRangeException());
TestException(new testExceptionMethodCallback(RemoveAt_I), arr);
}
public void Remove()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
dt.Constraints.Remove(dt.Constraints[0]);
Assert.Equal(0, dt.Constraints.Count);
}
public void Remove_ByNameSimple()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
dt.Constraints[0].ConstraintName = "constraint1";
dt.Constraints.Remove("constraint1");
Assert.Equal(0, dt.Constraints.Count);
}
public void CollectionChanged()
{
DataTable dt = DataProvider.CreateParentDataTable();
_collectionChangedFlag = false;
dt.Constraints.CollectionChanged += new CollectionChangeEventHandler(Constraints_CollectionChangedHandler);
dt = DataProvider.CreateUniqueConstraint(dt);
Assert.True(_collectionChangedFlag);
}
public void Remove_ByNameCollectionChangedEvent()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
_collectionChangedFlag = false;
dt.Constraints.CollectionChanged += new CollectionChangeEventHandler(Constraints_CollectionChangedHandler);
dt.Constraints.Remove("constraint1");
Assert.True(_collectionChangedFlag);
}
public void TestCanRemove_ByDataColumn()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
DataColumn dummyCol = new DataColumn();
Assert.Equal(false, dt.Columns.CanRemove(null));
Assert.Equal(false, dt.Columns.CanRemove(dummyCol));
Assert.Equal(false, dt.Columns.CanRemove(dt.Columns[0]));
Assert.Equal(true, dt.Columns.CanRemove(dt.Columns[1]));
}
public void CopyTo()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
dt.Constraints.Add("constraint2", dt.Columns["String1"], true);
var ar = new object[2];
dt.Constraints.CopyTo(ar, 0);
Assert.Equal(2, ar.Length);
}
public void Clear_Unique()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
int rowsCount = dt.Rows.Count;
dt.Constraints.Clear();
DataRow dr = dt.NewRow();
dr[0] = 1;
dt.Rows.Add(dr);
Assert.Equal(rowsCount + 1, dt.Rows.Count); // verifying no exception as well
}
public void Item()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
dt.Constraints[0].ConstraintName = "constraint1";
Assert.Equal("constraint1", dt.Constraints[0].ConstraintName);
Assert.Equal("constraint1", dt.Constraints["constraint1"].ConstraintName);
ArrayList arr = new ArrayList(1);
arr.Add(new IndexOutOfRangeException());
TestException(new testExceptionMethodCallback(Item2), arr);
}
public void Remove_ByNameWithAdd()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
dt.Constraints[0].ConstraintName = "constraint1";
Constraint con = new UniqueConstraint(dt.Columns["String1"], false);
dt.Constraints.Add(con);
dt.Constraints.Remove(con);
Assert.Equal(1, dt.Constraints.Count);
Assert.Equal("constraint1", dt.Constraints[0].ConstraintName);
}
public void GetEnumerator()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
dt.Constraints.Add("constraint2", dt.Columns["String1"], false);
int counter = 0;
IEnumerator myEnumerator = dt.Constraints.GetEnumerator();
while (myEnumerator.MoveNext())
{
counter++;
}
Assert.Equal(2, counter);
}
public void Count()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
Assert.Equal(1, dt.Constraints.Count);
//Add
dt.Constraints.Add("constraint2", dt.Columns["String1"], false);
Assert.Equal(2, dt.Constraints.Count);
//Remove
dt.Constraints.Remove("constraint2");
Assert.Equal(1, dt.Constraints.Count);
}
public void IndexOf()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
Assert.Equal(0, dt.Constraints.IndexOf(dt.Constraints[0]));
//Add new constraint
Constraint con = new UniqueConstraint(dt.Columns["String1"], false);
dt.Constraints.Add(con);
Assert.Equal(1, dt.Constraints.IndexOf(con));
//Remove it and try to look for it
dt.Constraints.Remove(con);
Assert.Equal(-1, dt.Constraints.IndexOf(con));
}
public void GetEnumerator()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
int counter = 0;
IEnumerator myEnumerator = dt.Columns.GetEnumerator();
while (myEnumerator.MoveNext())
{
counter++;
}
Assert.Equal(6, counter);
Assert.Throws <InvalidOperationException>(() =>
{
DataColumn col = (DataColumn)myEnumerator.Current;
});
}
public void Add_Constraint()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
Assert.Equal(1, dt.Constraints.Count);
Assert.Equal("Constraint1", dt.Constraints[0].ConstraintName);
DataSet ds = DataProvider.CreateForeignConstraint();
Assert.Equal(1, ds.Tables[1].Constraints.Count);
Assert.Equal(1, ds.Tables[0].Constraints.Count);
var arr = new ArrayList(1);
arr.Add(new ConstraintException());
TestException(new testExceptionMethodCallback(DataProvider.TryToBreakUniqueConstraint), arr);
arr = new ArrayList(1);
arr.Add(new InvalidConstraintException());
TestException(new testExceptionMethodCallback(DataProvider.TryToBreakForigenConstraint), arr);
}
private void RemoveAt_I()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
dt.Constraints.RemoveAt(2);
}
public void IsReadOnly()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
Assert.False(dt.Constraints.IsReadOnly);
}
private void Item2()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
dt.Constraints[1].ConstraintName = "error";
}
public void IsSynchronized()
{
DataTable dt = DataProvider.CreateUniqueConstraint();
Assert.False(dt.Constraints.IsSynchronized);
}
