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describe :string_unpack_string, shared: true do
it "returns an empty string if the input is empty" do
"".unpack(unpack_format).should == [""]
end
it "returns empty strings for repeated formats if the input is empty" do
"".unpack(unpack_format(nil, 3)).should == ["", "", ""]
end
it "returns an empty string and does not decode any bytes when the count modifier is zero" do
"abc".unpack(unpack_format(0)+unpack_format).should == ["", "a"]
end
it "implicitly has a count of one when no count is specified" do
"abc".unpack(unpack_format).should == ["a"]
end
it "decodes the number of bytes specified by the count modifier" do
"abc".unpack(unpack_format(3)).should == ["abc"]
end
it "decodes the number of bytes specified by the count modifier including whitespace bytes" do
[ ["a bc", ["a b", "c"]],
["a\fbc", ["a\fb", "c"]],
["a\nbc", ["a\nb", "c"]],
["a\rbc", ["a\rb", "c"]],
["a\tbc", ["a\tb", "c"]],
["a\vbc", ["a\vb", "c"]]
].should be_computed_by(:unpack, unpack_format(3)+unpack_format)
end
it "decodes past whitespace bytes when passed the '*' modifier" do
[ ["a b c", ["a b c"]],
["a\fb c", ["a\fb c"]],
["a\nb c", ["a\nb c"]],
["a\rb c", ["a\rb c"]],
["a\tb c", ["a\tb c"]],
["a\vb c", ["a\vb c"]],
].should be_computed_by(:unpack, unpack_format("*"))
end
end
describe :string_unpack_Aa, shared: true do
it "decodes the number of bytes specified by the count modifier including NULL bytes" do
"a\x00bc".unpack(unpack_format(3)+unpack_format).should == ["a\x00b", "c"]
end
it "decodes past NULL bytes when passed the '*' modifier" do
"a\x00b c".unpack(unpack_format("*")).should == ["a\x00b c"]
end
end
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