I have some code that computes (a)sin/(a)cos values which are expected to be very close to 0, but when I say
EXPECT_FLOAT_EQ(my_computed_var, 0);
I get errors like:
/path/to/my/test.cpp:148: Failure
Expected: my_computed_var
Which is: 9.9920072e-16
To be equal to: 0
How should I do this? I get this type of "error" for other numbers as well: -4.3711388e-08
Looking for both specific suggestions and general information about dealing with floating point error like this.
Use EXPECT_NEAR
or the FloatEq
matcher instead.
Floating-Point Macros said that EXPECT_FLOAT_EQ
EXPECT_DOUBLE_EQ
ASSERT_FLOAT_EQ
and ASSERT_DOUBLE_EQ
will verify
the two
float
/double
values are almost equal
and:
By "almost equal", we mean the two values are within 4 ULP's from each other.
with ULP is stand for Unit in the last places
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