public void TestStringColumnSort()
{
// StringColumn specific sort tests
StringColumn strColumn = new StringColumn("String", 0);
Assert.Equal(0, strColumn.NullCount);
for (int i = 0; i < 5; i++)
{
strColumn.Append(null);
}
Assert.Equal(5, strColumn.NullCount);
// Should handle all nulls
StringColumn sortedStrColumn = strColumn.Sort() as StringColumn;
Assert.Equal(5, sortedStrColumn.NullCount);
Assert.Null(sortedStrColumn[0]);
for (int i = 0; i < 5; i++)
{
strColumn.Append(i.ToString());
}
Assert.Equal(5, strColumn.NullCount);
// Ascending sort
sortedStrColumn = strColumn.Sort() as StringColumn;
Assert.Equal("0", sortedStrColumn[0]);
Assert.Null(sortedStrColumn[9]);
// Descending sort
sortedStrColumn = strColumn.Sort(false) as StringColumn;
Assert.Equal("4", sortedStrColumn[0]);
Assert.Null(sortedStrColumn[9]);
}
public void TestNullCounts()
{
PrimitiveColumn <int> dataFrameColumn1 = new PrimitiveColumn <int>("Int1", Enumerable.Range(0, 10).Select(x => x));
dataFrameColumn1.Append(null);
Assert.Equal(1, dataFrameColumn1.NullCount);
PrimitiveColumn <int> df2 = new PrimitiveColumn <int>("Int2");
Assert.Equal(0, df2.NullCount);
PrimitiveColumn <int> df3 = new PrimitiveColumn <int>("Int3", 10);
Assert.Equal(0, df3.NullCount);
// Test null counts with assignments on Primitive Columns
df2.Append(null);
df2.Append(1);
Assert.Equal(1, df2.NullCount);
df2[1] = 10;
Assert.Equal(1, df2.NullCount);
df2[1] = null;
Assert.Equal(2, df2.NullCount);
df2[1] = 5;
Assert.Equal(1, df2.NullCount);
df2[0] = null;
Assert.Equal(1, df2.NullCount);
// Test null counts with assignments on String Columns
StringColumn strCol = new StringColumn("String", 0);
Assert.Equal(0, strCol.NullCount);
StringColumn strCol1 = new StringColumn("String1", 5);
Assert.Equal(0, strCol1.NullCount);
StringColumn strCol2 = new StringColumn("String", Enumerable.Range(0, 10).Select(x => x.ToString()));
Assert.Equal(0, strCol2.NullCount);
StringColumn strCol3 = new StringColumn("String", Enumerable.Range(0, 10).Select(x => (string)null));
Assert.Equal(10, strCol3.NullCount);
strCol.Append(null);
Assert.Equal(1, strCol.NullCount);
strCol.Append("foo");
Assert.Equal(1, strCol.NullCount);
strCol[1] = "bar";
Assert.Equal(1, strCol.NullCount);
strCol[1] = null;
Assert.Equal(2, strCol.NullCount);
strCol[1] = "foo";
Assert.Equal(1, strCol.NullCount);
strCol[0] = null;
Assert.Equal(1, strCol.NullCount);
}
