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require_relative '../../spec_helper'
describe "String#append_bytes" do
ruby_version_is "3.4" do
it "doesn't allow to mutate frozen strings" do
str = "hello".freeze
-> { str.append_as_bytes("\xE2\x82") }.should raise_error(FrozenError)
end
it "allows creating broken strings" do
str = +"hello"
str.append_as_bytes("\xE2\x82")
str.valid_encoding?.should == false
str.append_as_bytes("\xAC")
str.valid_encoding?.should == true
str = "abc".encode(Encoding::UTF_32LE)
str.append_as_bytes("def")
str.encoding.should == Encoding::UTF_32LE
str.valid_encoding?.should == false
end
it "never changes the receiver encoding" do
str = "".b
str.append_as_bytes("€")
str.encoding.should == Encoding::BINARY
end
it "accepts variadic String or Integer arguments" do
str = "hello".b
str.append_as_bytes("\xE2\x82", 12, 43, "\xAC")
str.encoding.should == Encoding::BINARY
str.should == "hello\xE2\x82\f+\xAC".b
end
it "truncates integers to the least significant byte" do
str = +""
str.append_as_bytes(0x131, 0x232, 0x333, bignum_value, bignum_value(1))
str.bytes.should == [0x31, 0x32, 0x33, 0, 1]
end
it "wraps negative integers" do
str = "".b
str.append_as_bytes(-1, -bignum_value, -bignum_value(1))
str.bytes.should == [0xFF, 0, 0xFF]
end
it "only accepts strings or integers, and doesn't attempt to cast with #to_str or #to_int" do
to_str = mock("to_str")
to_str.should_not_receive(:to_str)
to_str.should_not_receive(:to_int)
str = +"hello"
-> { str.append_as_bytes(to_str) }.should raise_error(TypeError, "wrong argument type MockObject (expected String or Integer)")
end
end
end
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