ToleranceMode
Modes in which the tolerance value for a comparison can be interpreted.
Linear = 1
The tolerance is used as a numeric range within which
two compared _values are considered to be equal.
Percent = 2
Interprets the tolerance as the percentage by which
the two compared _values my deviate from each other.
Ulps = 3
Compares two _values based in their distance in
representable numbers.
Unset = 0
The tolerance was created with a value, without specifying
how the value would be used. This is used to prevent setting
the mode more than once and is generally changed to Linear
upon execution of the test.