public void ResetBitWorksForDailyMap()
{
// Offset 7654 3210
const byte byte2 = 0b_0000_0100;
// Offset 5432 1098
const byte byte1 = 0b_0010_0000;
// Offset 3210 9876
const byte byte0 = 0b_1000_0000;
var map = new byte[] { byte0, byte1, byte2 };
var startDate = new DateTime(2019, 1, 1);
var frequency = StreakOccurrenceFrequency.Daily;
// Reset a bit before the start date and get an error
var result = StreakTypeService.SetBit(map, startDate, startDate.AddDays(-1), frequency, false, out var errorMessage);
Assert.NotEmpty(errorMessage); // Verify error occurred
Assert.Same(result, map); // Verify in-place operation
Assert.Equal(byte0, result[0]); // Verify no changes
Assert.Equal(byte1, result[1]); // Verify no changes
Assert.Equal(byte2, result[2]); // Verify no changes
// Reset a bit that is already 0
result = StreakTypeService.SetBit(map, startDate, startDate.AddDays(0), frequency, false, out errorMessage);
Assert.Empty(errorMessage); // Verify no error
Assert.Same(result, map); // Verify in-place operation
Assert.Equal(byte0, result[0]); // Verify no changes
Assert.Equal(byte1, result[1]); // Verify no changes
Assert.Equal(byte2, result[2]); // Verify no changes
// Reset the first set bit
result = StreakTypeService.SetBit(map, startDate, startDate.AddDays(2), frequency, false, out errorMessage);
Assert.Empty(errorMessage); // Verify no errors
Assert.Same(result, map); // Verify in-place operation
Assert.Equal(0, result[2]); // Verify change
Assert.Equal(byte1, result[1]); // Verify no changes
Assert.Equal(byte0, result[0]); // Verify no changes
// Reset a bit beyond the array and force it to grow
result = StreakTypeService.SetBit(map, startDate, startDate.AddDays(24), frequency, false, out errorMessage);
Assert.Empty(errorMessage); // Verify no errors
Assert.NotSame(result, map); // Verify memory allocation occurred for new array
var newLength = 128;
Assert.True(result.Length == newLength); // Verify the array grew to the next multiple of 128
Assert.Equal(0, result[newLength - 1]); // Verify no additional changes
Assert.Equal(byte1, result[newLength - 2]); // Verify no changes
Assert.Equal(byte0, result[newLength - 3]); // Verify no changes
// Verify all other bytes are unset
for (var i = 0; i < (newLength - 3); i++)
{
Assert.Equal(0, result[i]);
}
}
/// <summary>
/// Write the map to the view state but not to the database
/// </summary>
private void SaveMapState()
{
var streakType = GetStreakType();
var map = GetTargetMap();
var errorMessage = string.Empty;
foreach (ListItem checkbox in cblCheckboxes.Items)
{
var representedDate = checkbox.Value.AsDateTime();
if (representedDate.HasValue)
{
map = StreakTypeService.SetBit(map, streakType.StartDate, representedDate.Value,
streakType.OccurrenceFrequency, checkbox.Selected, out errorMessage);
}
}
ViewState[ViewStateKey.Map] = StreakTypeService.GetHexDigitStringFromMap(map);
}