swh:1:snp:a72e953ecd624a7df6e6196bbdd05851996c5e40
Tip revision: 335200c142e368cad9aba885df5539d2755195ad authored by Matt Bauman on 20 October 2015, 14:59:09 UTC
add temporary forward declarations
add temporary forward declarations
Tip revision: 335200c
nullable.jl
# This file is a part of Julia. License is MIT: http://julialang.org/license
types = [
Bool,
Float16,
Float32,
Float64,
Int128,
Int16,
Int32,
Int64,
Int8,
UInt16,
UInt32,
UInt64,
UInt8,
]
# Nullable{T}() = new(true)
for T in types
x = Nullable{T}()
@test x.isnull === true
@test isa(x.value, T)
@test eltype(Nullable{T}) === T
@test eltype(x) === T
end
# Nullable{T}(value::T) = new(false, value)
for T in types
x = Nullable{T}(zero(T))
@test x.isnull === false
@test isa(x.value, T)
@test x.value === zero(T)
@test eltype(x) === T
x = Nullable{T}(one(T))
@test x.isnull === false
@test isa(x.value, T)
@test x.value === one(T)
@test eltype(x) === T
end
# Nullable{T}(value::T, isnull::Bool) = new(isnull, value)
for T in types
x = Nullable{T}(zero(T),false)
@test x.isnull === false
@test isa(x.value, T)
@test x.value === zero(T)
@test eltype(x) === T
x = Nullable{T}(zero(T),true)
@test x.isnull === true
@test isa(x.value, T)
@test eltype(Nullable{T}) === T
@test eltype(x) === T
end
# immutable NullException <: Exception
@test isa(NullException(), NullException)
@test_throws NullException throw(NullException())
# Nullable{T}(value::T) = Nullable{T}(value)
for T in types
v = zero(T)
x = Nullable(v)
@test x.isnull === false
@test isa(x.value, T)
@test x.value === v
v = one(T)
x = Nullable(v)
@test x.isnull === false
@test isa(x.value, T)
@test x.value === v
end
p1s = [
"Nullable{Bool}()",
"Nullable{Char}()",
"Nullable{Float16}()",
"Nullable{Float32}()",
"Nullable{Float64}()",
"Nullable{Int128}()",
"Nullable{Int16}()",
"Nullable{Int32}()",
"Nullable{Int64}()",
"Nullable{Int8}()",
"Nullable{UInt16}()",
"Nullable{UInt32}()",
"Nullable{UInt64}()",
"Nullable{UInt8}()",
]
p2s = [
"Nullable(false)",
"Nullable('\0')",
"Nullable(Float16(0.0))",
"Nullable(0.0f0)",
"Nullable(0.0)",
"Nullable(0)",
"Nullable(0)",
"Nullable(0)",
"Nullable(0)",
"Nullable(0)",
"Nullable(0x0000)",
"Nullable(0x00000000)",
"Nullable(0x0000000000000000)",
"Nullable(0x00)",
]
p3s = [
"Nullable(true)",
"Nullable('\x01')",
"Nullable(Float16(1.0))",
"Nullable(1.0f0)",
"Nullable(1.0)",
"Nullable(1)",
"Nullable(1)",
"Nullable(1)",
"Nullable(1)",
"Nullable(1)",
"Nullable(0x0001)",
"Nullable(0x00000001)",
"Nullable(0x0000000000000001)",
"Nullable(0x01)",
]
# show{T}(io::IO, x::Nullable{T})
io = IOBuffer()
for (i, T) in enumerate(types)
x1 = Nullable{T}()
x2 = Nullable(zero(T))
x3 = Nullable(one(T))
show(io, x1)
takebuf_string(io) == p1s[i]
show(io, x2)
takebuf_string(io) == p2s[i]
show(io, x3)
takebuf_string(io) == p3s[i]
end
# get(x::Nullable)
for T in types
x1 = Nullable{T}()
x2 = Nullable(zero(T))
x3 = Nullable(one(T))
@test_throws NullException get(x1)
@test get(x2) === zero(T)
@test get(x3) === one(T)
end
# get{S, T}(x::Nullable{S}, y::T)
for T in types
x1 = Nullable{T}()
x2 = Nullable(zero(T))
x3 = Nullable(one(T))
@test get(x1, zero(T)) === zero(T)
@test get(x1, one(T)) === one(T)
@test get(x2, one(T)) === zero(T)
@test get(x3, zero(T)) === one(T)
end
# isnull(x::Nullable)
for T in types
x1 = Nullable{T}()
x2 = Nullable(zero(T))
x3 = Nullable(one(T))
@test isnull(x1) === true
@test isnull(x2) === false
@test isnull(x3) === false
end
# function isequal{S, T}(x::Nullable{S}, y::Nullable{T})
for T in types
x1 = Nullable{T}()
x2 = Nullable{T}()
x3 = Nullable(zero(T))
x4 = Nullable(one(T))
@test isequal(x1, x1) === true
@test isequal(x1, x2) === true
@test isequal(x1, x3) === false
@test isequal(x1, x4) === false
@test isequal(x2, x1) === true
@test isequal(x2, x2) === true
@test isequal(x2, x3) === false
@test isequal(x2, x4) === false
@test isequal(x3, x1) === false
@test isequal(x3, x2) === false
@test isequal(x3, x3) === true
@test isequal(x3, x4) === false
@test isequal(x4, x1) === false
@test isequal(x4, x2) === false
@test isequal(x4, x3) === false
@test isequal(x4, x4) === true
end
# function =={S, T}(x::Nullable{S}, y::Nullable{T})
for T in types
x1 = Nullable{T}()
x2 = Nullable{T}()
x3 = Nullable(zero(T))
x4 = Nullable(one(T))
@test_throws NullException (x1 == x1)
@test_throws NullException (x1 == x2)
@test_throws NullException (x1 == x3)
@test_throws NullException (x1 == x4)
@test_throws NullException (x2 == x1)
@test_throws NullException (x2 == x2)
@test_throws NullException (x2 == x3)
@test_throws NullException (x2 == x4)
@test_throws NullException (x3 == x1)
@test_throws NullException (x3 == x2)
@test_throws NullException (x3 == x3)
@test_throws NullException (x3 == x4)
@test_throws NullException (x4 == x1)
@test_throws NullException (x4 == x2)
@test_throws NullException (x4 == x3)
@test_throws NullException (x4 == x4)
end
# function hash(x::Nullable, h::UInt)
for T in types
x1 = Nullable{T}()
x2 = Nullable{T}()
x3 = Nullable(zero(T))
x4 = Nullable(one(T))
@test isa(hash(x1), UInt)
@test isa(hash(x2), UInt)
@test isa(hash(x3), UInt)
@test isa(hash(x4), UInt)
@test hash(x1) == hash(x2)
@test hash(x1) != hash(x3)
@test hash(x1) != hash(x4)
@test hash(x2) != hash(x3)
@test hash(x2) != hash(x4)
@test hash(x3) != hash(x4)
end
type TestNType{T}
v::Nullable{T}
end
for T in types
x1 = TestNType{T}(Nullable{T}())
@test isnull(x1.v)
x1.v = one(T)
@test !isnull(x1.v)
@test get(x1.v, one(T)) === one(T)
end
# issue #9462
for T in types
@test isa(convert(Nullable{Number}, Nullable(one(T))), Nullable{Number})
@test isa(convert(Nullable{Any}, Nullable(one(T))), Nullable{Any})
end
@test isnull(convert(Nullable, nothing))
@test isnull(convert(Nullable{Int}, nothing))
@test isa(convert(Nullable{Int}, nothing), Nullable{Int})
# issue #11675
@test repr(Nullable()) == "Nullable{Union{}}()"