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_not :windows do it "raises a TypeError if passed nil" do lambda { @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 lambda { @s.FIX2INT(0x7fff_ffff+1) }.should raise_error(RangeError) lambda { @s.FIX2INT(-(1 << 31) - 1) }.should raise_error(RangeError) end it "raises a RangeError if the value is more than 32bits" do lambda { @s.FIX2INT(0xffff_ffff+1) }.should raise_error(RangeError) end it "raises a RangeError if the value is more than 64bits" do lambda { @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_not :windows do it "raises a TypeError if passed nil" do lambda { @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 lambda { @s.FIX2UINT(0xffff_ffff+1) }.should raise_error(RangeError) lambda { @s.FIX2UINT(-(1 << 31) - 1) }.should raise_error(RangeError) end it "raises a RangeError if the value is more than 32bits" do lambda { @s.FIX2UINT(0xffff_ffff+1) }.should raise_error(RangeError) end it "raises a RangeError if the value is more than 64bits" do lambda { @s.FIX2UINT(0xffff_ffff_ffff_ffff+1) }.should raise_error(RangeError) end end end end