public void ReadWithNoRows()
{
DataTable table = new DataTable();
table.Columns.Add("State", typeof(string));
TableDataReader reader = new TableDataReader(table);
// No rows, so it should return false
Assert.IsFalse(reader.Read());
}
public void GetOrdinalWhenTheOrdinalCannotBeFound()
{
DataTable table = new DataTable();
table.Columns.Add("State", typeof(string));
table.Columns.Add("Direction", typeof(string));
table.Columns.Add("Count", typeof(int));
table.Columns.Add("Sum", typeof(int));
IDataReader reader = new TableDataReader(table);
Assert.AreEqual(0, reader.GetOrdinal("NotAColumn"));
}
public void ReadWithOneRow()
{
DataTable table = new DataTable();
table.Columns.Add("State", typeof(string));
table.Rows.Add(new object[] { "TX" });
TableDataReader reader = new TableDataReader(table);
// One row, so it should return true the first time, and false the second
Assert.IsTrue(reader.Read());
Assert.IsFalse(reader.Read());
}
public void FieldCount()
{
DataTable table = new DataTable();
table.Columns.Add("State", typeof(string));
table.Columns.Add("Direction", typeof(string));
table.Columns.Add("Count", typeof(int));
table.Columns.Add("Sum", typeof(int));
IDataReader reader = new TableDataReader(table);
Assert.AreEqual(4, reader.FieldCount);
}
public void GetOrdinal()
{
DataTable table = new DataTable();
table.Columns.Add("State", typeof(string));
table.Columns.Add("Direction", typeof(string));
table.Columns.Add("Count", typeof(int));
table.Columns.Add("Sum", typeof(int));
IDataReader reader = new TableDataReader(table);
Assert.AreEqual(0, reader.GetOrdinal("State"));
Assert.AreEqual(1, reader.GetOrdinal("Direction"));
Assert.AreEqual(2, reader.GetOrdinal("Count"));
Assert.AreEqual(3, reader.GetOrdinal("Sum"));
}
public void ReadingAClosedReaderThrowsAnException()
{
DataTable table = new DataTable();
table.Columns.Add("State", typeof(string));
table.Rows.Add(new object[] { "TX" });
table.Rows.Add(new object[] { "MO" });
table.Rows.Add(new object[] { "AR" });
TableDataReader reader = new TableDataReader(table);
Assert.IsFalse(reader.IsClosed);
reader.Close();
Assert.IsTrue(reader.IsClosed);
reader.Read();
}
public void ClosingFunctionality()
{
DataTable table = new DataTable();
table.Columns.Add("State", typeof(string));
table.Rows.Add(new object[] { "TX" });
table.Rows.Add(new object[] { "MO" });
table.Rows.Add(new object[] { "AR" });
TableDataReader reader = new TableDataReader(table);
Assert.IsFalse(reader.IsClosed);
reader.Close();
Assert.IsTrue(reader.IsClosed);
reader = new TableDataReader(table);
reader.Dispose();
Assert.IsTrue(reader.IsClosed);
}
public void IsDBNull()
{
DataTable table = new DataTable();
table.Columns.Add("State", typeof(string));
table.Columns.Add("Direction", typeof(string));
table.Columns.Add("Count", typeof(int));
table.Columns.Add("Sum", typeof(int));
table.Rows.Add(new object[] { DBNull.Value, "North", DBNull.Value, 2 });
IDataReader reader = new TableDataReader(table);
reader.Read();
Assert.IsTrue(reader.IsDBNull(0));
Assert.IsFalse(reader.IsDBNull(1));
Assert.IsTrue(reader.IsDBNull(2));
Assert.IsFalse(reader.IsDBNull(3));
}
public void GetValue()
{
DataTable table = new DataTable();
table.Columns.Add("State", typeof(string));
table.Columns.Add("Direction", typeof(string));
table.Columns.Add("Count", typeof(int));
table.Columns.Add("Sum", typeof(int));
table.Rows.Add(new object[] { "TX", "North", 1, 2 });
IDataReader reader = new TableDataReader(table);
reader.Read();
Assert.AreEqual("TX", (string)reader.GetValue(0));
Assert.AreEqual("North", (string)reader.GetValue(1));
Assert.AreEqual(1, (int)reader.GetValue(2));
Assert.AreEqual(2, (int)reader.GetValue(3));
}
