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require_relative 'spec_helper'
load_extension("fixnum")
describe "CApiFixnumSpecs" do
before :each do
@s = CApiFixnumSpecs.new
end
describe "FIX2INT" do
max_int = (1 << 31) - 1
min_int = -(1 << 31)
it "converts a Fixnum to a native int" do
@s.FIX2INT(42).should == 42
@s.FIX2INT(-14).should == -14
@s.FIX2INT(-1).should == -1
@s.FIX2INT(1).should == 1
end
guard -> { fixnum_min <= min_int and max_int <= fixnum_max } do
it "converts a Fixnum representing the minimum and maximum native int" do
@s.FIX2INT(max_int).should == max_int
@s.FIX2INT(min_int).should == min_int
end
end
platform_is wordsize: 64 do # sizeof(long) > sizeof(int)
it "raises a TypeError if passed nil" do
-> { @s.FIX2INT(nil) }.should raise_error(TypeError)
end
it "converts a Float" do
@s.FIX2INT(25.4567).should == 25
end
it "converts a negative Bignum into an signed number" do
@s.FIX2INT(-2147442171).should == -2147442171
end
it "raises a RangeError if the value does not fit a native int" do
-> { @s.FIX2INT(0x7fff_ffff+1) }.should raise_error(RangeError)
-> { @s.FIX2INT(-(1 << 31) - 1) }.should raise_error(RangeError)
end
it "raises a RangeError if the value is more than 32bits" do
-> { @s.FIX2INT(0xffff_ffff+1) }.should raise_error(RangeError)
end
it "raises a RangeError if the value is more than 64bits" do
-> { @s.FIX2INT(0xffff_ffff_ffff_ffff+1) }.should raise_error(RangeError)
end
it "calls #to_int to coerce the value" do
obj = mock("number")
obj.should_receive(:to_int).and_return(2)
@s.FIX2INT(obj).should == 2
end
end
end
describe "FIX2UINT" do
max_uint = (1 << 32) - 1
it "converts a Fixnum" do
@s.FIX2UINT(0).should == 0
@s.FIX2UINT(1).should == 1
@s.FIX2UINT(42).should == 42
end
guard -> { max_uint <= fixnum_max } do
it "converts a Fixnum representing the maximum native uint" do
@s.FIX2UINT(max_uint).should == max_uint
end
end
platform_is wordsize: 64 do # sizeof(long) > sizeof(int)
it "raises a TypeError if passed nil" do
-> { @s.FIX2UINT(nil) }.should raise_error(TypeError)
end
it "converts a Float" do
@s.FIX2UINT(25.4567).should == 25
end
it "raises a RangeError if the value does not fit a native uint" do
# Interestingly, on MRI FIX2UINT(-1) is allowed
-> { @s.FIX2UINT(0xffff_ffff+1) }.should raise_error(RangeError)
-> { @s.FIX2UINT(-(1 << 31) - 1) }.should raise_error(RangeError)
end
it "raises a RangeError if the value is more than 32bits" do
-> { @s.FIX2UINT(0xffff_ffff+1) }.should raise_error(RangeError)
end
it "raises a RangeError if the value is more than 64bits" do
-> { @s.FIX2UINT(0xffff_ffff_ffff_ffff+1) }.should raise_error(RangeError)
end
end
end
end
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