public void Equals_Rows_Deleted()
{
DataRowComparer <DataRow> c = DataRowComparer.Default;
DataTable dtA = new DataTable("tableA");
dtA.Columns.Add("col1", typeof(int));
dtA.Columns.Add("col2", typeof(string));
dtA.Columns.Add("col3", typeof(DateTime));
DataRow r1 = dtA.Rows.Add(3, "bar", new DateTime(2008, 5, 7));
DataRow r2 = dtA.Rows.Add(3, "bar", new DateTime(2008, 5, 7));
r1.Delete();
// left row deleted
try
{
c.Equals(r1, r2);
Assert.True(false, "#A1");
}
catch (RowNotInTableException ex)
{
Assert.Equal(typeof(RowNotInTableException), ex.GetType());
Assert.Null(ex.InnerException);
Assert.NotNull(ex.Message);
}
// right row deleted
try
{
c.Equals(r2, r1);
Assert.True(false, "#B1");
}
catch (RowNotInTableException ex)
{
Assert.Equal(typeof(RowNotInTableException), ex.GetType());
Assert.Null(ex.InnerException);
Assert.NotNull(ex.Message);
}
r2.Delete();
// both rows deleted
try
{
c.Equals(r2, r1);
Assert.True(false, "#C1");
}
catch (RowNotInTableException ex)
{
Assert.Equal(typeof(RowNotInTableException), ex.GetType());
Assert.Null(ex.InnerException);
Assert.NotNull(ex.Message);
}
}
public void Equals_Rows_Detached()
{
DataRowComparer <DataRow> c = DataRowComparer.Default;
DataTable dt = new DataTable("tableA");
dt.Columns.Add("col1", typeof(int));
dt.Columns.Add("col2", typeof(string));
dt.Columns.Add("col3", typeof(DateTime));
DataRow r1 = dt.Rows.Add(3, "bar", new DateTime(2008, 5, 7));
DataRow r2 = dt.NewRow();
r2.ItemArray = new object[] { 3, "bar", new DateTime(2008, 5, 7) };
DataRow r3 = dt.NewRow();
r3.ItemArray = new object[] { 3, "bar", new DateTime(2008, 5, 7) };
// left row detached
Assert.True(c.Equals(r2, r1), "#A1");
r1["col1"] = 4;
Assert.False(c.Equals(r2, r1), "#A2");
r1["col1"] = 3;
Assert.True(c.Equals(r2, r1), "#A3");
// right row detached
Assert.True(c.Equals(r1, r2), "#B1");
r1["col2"] = "baz";
Assert.False(c.Equals(r1, r2), "#B2");
r1["col2"] = "bar";
Assert.True(c.Equals(r1, r2), "#B3");
// both rows detached
Assert.True(c.Equals(r2, r3), "#C1");
r2["col3"] = new DateTime(2008, 6, 7);
Assert.False(c.Equals(r2, r3), "#C2");
r2["col3"] = new DateTime(2008, 5, 7);
Assert.True(c.Equals(r2, r3), "#C3");
}
public void Equals()
{
DataRowComparer <DataRow> c = DataRowComparer.Default;
DataTable dtA = new DataTable("tableA");
dtA.Columns.Add("col1", typeof(int));
dtA.Columns.Add("col2", typeof(string));
dtA.Columns.Add("col3", typeof(DateTime));
DataRow r1 = dtA.Rows.Add(3, "bar", new DateTime(2008, 5, 7));
DataRow r2 = dtA.Rows.Add(3, "bar", new DateTime(2008, 5, 7));
Assert.True(c.Equals(r1, r2), "#A1");
r1["col1"] = 4;
Assert.False(c.Equals(r1, r2), "#A2");
r1["col1"] = 3;
Assert.True(c.Equals(r1, r2), "#A3");
r1["col2"] = null;
Assert.False(c.Equals(r1, r2), "#B1");
r2["col2"] = null;
Assert.True(c.Equals(r1, r2), "#B2");
r1["col2"] = "bar";
Assert.False(c.Equals(r1, r2), "#B3");
r2["col2"] = "bar";
Assert.True(c.Equals(r1, r2), "#B4");
r1["col3"] = DBNull.Value;
Assert.False(c.Equals(r1, r2), "#C1");
r2["col3"] = DBNull.Value;
Assert.True(c.Equals(r1, r2), "#C2");
r1["col3"] = new DateTime(2008, 5, 7);
Assert.False(c.Equals(r1, r2), "#C3");
r2["col3"] = new DateTime(2008, 5, 7);
Assert.True(c.Equals(r1, r2), "#C4");
Assert.False(c.Equals(r1, null), "#D1");
Assert.False(c.Equals(null, r1), "#D2");
Assert.True(c.Equals(null, null), "#D3");
// rows do not have to share the same parent
DataTable dtB = new DataTable("tableB");
dtB.Columns.Add("colB1", typeof(int));
dtB.Columns.Add("colB2", typeof(string));
dtB.Columns.Add("colB3", typeof(DateTime));
DataRow r3 = dtB.Rows.Add(3, "bar", new DateTime(2008, 5, 7));
Assert.True(c.Equals(r1, r3), "#E1");
r1["col1"] = 4;
Assert.False(c.Equals(r1, r3), "#E2");
r1["col1"] = 3;
Assert.True(c.Equals(r1, r3), "#E3");
// difference in rowstate is ignored
r1.AcceptChanges();
Assert.True(c.Equals(r1, r2), "#G1");
r1["col1"] = 4;
Assert.False(c.Equals(r1, r2), "#G2");
r1["col1"] = 3;
Assert.True(c.Equals(r1, r2), "#G3");
// rows have different number of columns
DataTable dtC = new DataTable("tableC");
dtC.Columns.Add("colC1", typeof(int));
dtC.Columns.Add("colC2", typeof(string));
DataRow r4 = dtC.Rows.Add(3, "bar");
Assert.False(c.Equals(r1, r4), "#H1");
r1["col3"] = DBNull.Value;
Assert.False(c.Equals(r1, r4), "#H2");
}