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std › math › frexp › FrexpTests Private Type Function FrexpTests Doc Source Private Type Function std.math.frexp.FrexpTests
fn FrexpTests (comptime Float : type ) type Values File math/frexp.zig: 89
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155 fn FrexpTests (comptime Float : type ) type {
return struct {
const T = Float ;
test "normal" {
const epsilon = 1e-6 ;
var r : Frexp T undefined ;
r = frexp @as (T 1.3 ));
try expectApproxEqAbs 0.65 , r .significand , epsilon );
try expectEqual 1 , r .exponent );
r = frexp @as (T 78.0234 ));
try expectApproxEqAbs 0.609558 , r .significand , epsilon );
try expectEqual 7 , r .exponent );
r = frexp @as (T 1234.5678 ));
try expectEqual 11 , r .exponent );
try expectApproxEqAbs 0.602816 , r .significand , epsilon );
}
test "max" {
const exponent = math floatExponentMax (T 1 ;
const significand = 1.0 - math floatEps (T 2 ;
const r : Frexp T frexp math floatMax (T try expectEqual exponent , r .exponent );
try expectEqual significand , r .significand );
}
test "min" {
const exponent = math floatExponentMin (T 1 ;
const r : Frexp T frexp math floatMin (T try expectEqual exponent , r .exponent );
try expectEqual 0.5 , r .significand );
}
test "subnormal" {
const normal_min_exponent = math floatExponentMin (T 1 ;
const exponent = normal_min_exponent - math floatFractionalBits (T const r : Frexp T frexp math floatTrueMin (T try expectEqual exponent , r .exponent );
try expectEqual 0.5 , r .significand );
}
test "zero" {
var r : Frexp T undefined ;
r = frexp @as (T 0.0 ));
try expectEqual 0 , r .exponent );
try expect math isPositiveZero (r .significand ));
r = frexp @as (T 0.0 ));
try expectEqual 0 , r .exponent );
try expect math isNegativeZero (r .significand ));
}
test "inf" {
var r : Frexp T undefined ;
r = frexp math inf (T try expectEqual 0 , r .exponent );
try expect math isPositiveInf (r .significand ));
r = frexp math inf (T try expectEqual 0 , r .exponent );
try expect math isNegativeInf (r .significand ));
}
test "nan" {
const r : Frexp T frexp math nan (T try expect math isNan (r .significand ));
}
};
}
Generate a namespace of tests for frexp on values of the given type