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# -*- encoding: utf-8 -*-
describe :string_unpack_unicode, shared: true do
it "decodes Unicode codepoints as ASCII values" do
[ ["\x00", [0]],
["\x01", [1]],
["\x08", [8]],
["\x0f", [15]],
["\x18", [24]],
["\x1f", [31]],
["\x7f", [127]],
["\xc2\x80", [128]],
["\xc2\x81", [129]],
["\xc3\xbf", [255]]
].should be_computed_by(:unpack, "U")
end
it "decodes the number of characters specified by the count modifier" do
[ ["\xc2\x80\xc2\x81\xc2\x82\xc2\x83", "U1", [0x80]],
["\xc2\x80\xc2\x81\xc2\x82\xc2\x83", "U2", [0x80, 0x81]],
["\xc2\x80\xc2\x81\xc2\x82\xc2\x83", "U3", [0x80, 0x81, 0x82]]
].should be_computed_by(:unpack)
end
it "implicitly has a count of one when no count modifier is passed" do
"\xc2\x80\xc2\x81\xc2\x82\xc2\x83".unpack("U1").should == [0x80]
end
it "decodes all remaining characters when passed the '*' modifier" do
"\xc2\x80\xc2\x81\xc2\x82\xc2\x83".unpack("U*").should == [0x80, 0x81, 0x82, 0x83]
end
it "decodes UTF-8 BMP codepoints" do
[ ["\xc2\x80", [0x80]],
["\xdf\xbf", [0x7ff]],
["\xe0\xa0\x80", [0x800]],
["\xef\xbf\xbf", [0xffff]]
].should be_computed_by(:unpack, "U")
end
it "decodes UTF-8 max codepoints" do
[ ["\xf0\x90\x80\x80", [0x10000]],
["\xf3\xbf\xbf\xbf", [0xfffff]],
["\xf4\x80\x80\x80", [0x100000]],
["\xf4\x8f\xbf\xbf", [0x10ffff]]
].should be_computed_by(:unpack, "U")
end
it "does not decode any items for directives exceeding the input string size" do
"\xc2\x80".unpack("UUUU").should == [0x80]
end
it "ignores NULL bytes between directives" do
"\x01\x02".unpack("U\x00U").should == [1, 2]
end
it "ignores spaces between directives" do
"\x01\x02".unpack("U U").should == [1, 2]
end
end
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