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# -*- encoding: binary -*-
describe :array_pack_string, shared: true do
it "adds count bytes of a String to the output" do
["abc"].pack(pack_format(2)).should == "ab"
end
it "implicitly has a count of one when no count is specified" do
["abc"].pack(pack_format).should == "a"
end
it "does not add any bytes when the count is zero" do
["abc"].pack(pack_format(0)).should == ""
end
it "is not affected by a previous count modifier" do
["abcde", "defg"].pack(pack_format(3)+pack_format).should == "abcd"
end
it "raises an ArgumentError when the Array is empty" do
lambda { [].pack(pack_format) }.should raise_error(ArgumentError)
end
it "raises an ArgumentError when the Array has too few elements" do
lambda { ["a"].pack(pack_format(nil, 2)) }.should raise_error(ArgumentError)
end
it "calls #to_str to convert the element to a String" do
obj = mock('pack string')
obj.should_receive(:to_str).and_return("abc")
[obj].pack(pack_format).should == "a"
end
it "raises a TypeError when the object does not respond to #to_str" do
obj = mock("not a string")
lambda { [obj].pack(pack_format) }.should raise_error(TypeError)
end
it "returns a string in encoding of common to the concatenated results" do
f = pack_format("*")
[ [["\u{3042 3044 3046 3048}", 0x2000B].pack(f+"U"), Encoding::ASCII_8BIT],
[["abcde\xd1", "\xFF\xFe\x81\x82"].pack(f+"u"), Encoding::ASCII_8BIT],
[["a".force_encoding("ascii"), "\xFF\xFe\x81\x82"].pack(f+"u"), Encoding::ASCII_8BIT],
# under discussion [ruby-dev:37294]
[["\u{3042 3044 3046 3048}", 1].pack(f+"N"), Encoding::ASCII_8BIT]
].should be_computed_by(:encoding)
end
end
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