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floatfuncs.jl
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floatfuncs.jl
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# This file is a part of Julia. License is MIT: https://julialang.org/license
using Test
# test the basic floating point functions
@testset "flipsign" begin
for elty in (Float32,Float64)
x = convert(elty,-2.0)
x = flipsign(x,-1.0)
@test flipsign(x,big(-1.0)) == convert(elty,-2.0)
end
end
@testset "maxintfloat" begin
@test maxintfloat(Float16) === Float16(2048f0)
for elty in (Float16,Float32,Float64)
@test maxintfloat(rand(elty)) === maxintfloat(elty)
end
@test maxintfloat() === maxintfloat(Float64)
@test maxintfloat(Float64, Int32) === 2147483647.0
@test maxintfloat(Float32, Int32) === maxintfloat(Float32)
@test maxintfloat(Float64, Int16) === 32767.0
@test maxintfloat(Float64, Int64) === maxintfloat(Float64)
end
@testset "isinteger" begin
for elty in (Float16, Float32, Float64)
@test !isinteger(elty(1.2))
@test isinteger(elty(12))
@test isinteger(zero(elty))
@test isinteger(-zero(elty))
@test !isinteger(nextfloat(zero(elty)))
@test !isinteger(prevfloat(zero(elty)))
@test isinteger(maxintfloat(elty))
@test isinteger(-maxintfloat(elty))
@test !isinteger(elty(Inf))
@test !isinteger(-elty(Inf))
@test !isinteger(elty(NaN))
end
end
@testset "round" begin
for elty in (Float32, Float64)
x = rand(elty)
A = fill(x,(10,10))
@test round.(A,RoundToZero) == fill(trunc(x),(10,10))
@test round.(A,RoundUp) == fill(ceil(x),(10,10))
@test round.(A,RoundDown) == fill(floor(x),(10,10))
A = fill(x,(10,10,10))
@test round.(A,RoundToZero) == fill(trunc(x),(10,10,10))
@test round.(A,RoundUp) == fill(ceil(x),(10,10,10))
@test round.(A,RoundDown) == fill(floor(x),(10,10,10))
for elty2 in (Int32,Int64)
A = fill(x,(10,))
@test round.(elty2,A,RoundToZero) == fill(trunc(elty2,x),(10,))
@test round.(elty2,A,RoundUp) == fill(ceil(elty2,x),(10,))
@test round.(elty2,A,RoundDown) == fill(floor(elty2,x),(10,))
A = fill(x,(10,10))
@test round.(elty2,A,RoundToZero) == fill(trunc(elty2,x),(10,10))
@test round.(elty2,A,RoundUp) == fill(ceil(elty2,x),(10,10))
@test round.(elty2,A,RoundDown) == fill(floor(elty2,x),(10,10))
A = fill(x,(10,10,10))
@test round.(elty2,A,RoundToZero) == fill(trunc(elty2,x),(10,10,10))
@test round.(elty2,A,RoundUp) == fill(ceil(elty2,x),(10,10,10))
@test round.(elty2,A,RoundDown) == fill(floor(elty2,x),(10,10,10))
@test round.(elty2,A) == fill(round(elty2,x),(10,10,10))
end
end
end
@testset "Types" begin
for x in (Int16(0), 1, 2f0, pi, 3//4, big(5//6), 7.8, big(9), big(ℯ))
@test float(typeof(x)) == typeof(float(x))
@test float(typeof(complex(x, x))) == typeof(float(complex(x, x)))
end
end