hamcrest
closeTo fails with negative error values
I'm getting an error that doesn't look right to me:
java.lang.AssertionError: test lng1 close to e-6 error Expected: is a numeric value within <-2.0013229086876708E-6> of <-2.001322908687671> but: <-2.001322908687671> differed by <2.0013229086876708E-6>
Test code is:
double lng1 = -2.001322908687671;
assertThat("test lng1 close to zero error", lng1, closeTo(lng1, 0D)); // This passes assertThat("test lng1 close to e-6 error", lng1, closeTo(lng1, lng1/1000000.0D)); // This fails!
This seems to be because the error value is negative which causes closeTo to always fail. Is this working as designed or does closeTo need an abs() in it?
Just bumped into this issue. A very typical use case for the {{closeTo}} matcher is to use a relative error:
double expected = ....;
double actual = ...;
assertThat( actual, closeTo(expected, expected * 1e-8);
This will always fail when expected is a negative number.
