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require_relative '../../spec_helper'
describe "String#unpack" do
it "raises a TypeError when passed nil" do
-> { "abc".unpack(nil) }.should raise_error(TypeError)
end
it "raises a TypeError when passed an Integer" do
-> { "abc".unpack(1) }.should raise_error(TypeError)
end
it "starts unpacking from the given offset" do
"abc".unpack("CC", offset: 1).should == [98, 99]
end
it "traits offset as a bytes offset" do
"؈".unpack("CC").should == [216, 136]
"؈".unpack("CC", offset: 1).should == [136, nil]
end
it "raises an ArgumentError when the offset is negative" do
-> { "a".unpack("C", offset: -1) }.should raise_error(ArgumentError, "offset can't be negative")
end
it "returns nil if the offset is at the end of the string" do
"a".unpack("C", offset: 1).should == [nil]
end
it "raises an ArgumentError when the offset is larger than the string" do
-> { "a".unpack("C", offset: 2) }.should raise_error(ArgumentError, "offset outside of string")
end
end
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