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69 lines
2 KiB
Ruby
69 lines
2 KiB
Ruby
# -*- encoding: utf-8 -*-
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require_relative '../../spec_helper'
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describe "String#getbyte" do
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it "returns an Integer if given a valid index" do
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"a".getbyte(0).should be_kind_of(Integer)
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end
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it "starts indexing at 0" do
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"b".getbyte(0).should == 98
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# copy-on-write case
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_str1, str2 = "fooXbar".split("X")
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str2.getbyte(0).should == 98
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end
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it "counts from the end of the String if given a negative argument" do
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"glark".getbyte(-1).should == "glark".getbyte(4)
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# copy-on-write case
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_str1, str2 = "fooXbar".split("X")
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str2.getbyte(-1).should == 114
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end
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it "returns an Integer between 0 and 255" do
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"\x00".getbyte(0).should == 0
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[0xFF].pack('C').getbyte(0).should == 255
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256.chr('utf-8').getbyte(0).should == 196
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256.chr('utf-8').getbyte(1).should == 128
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end
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it "regards a multi-byte character as having multiple bytes" do
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chr = "\u{998}"
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chr.bytesize.should == 3
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chr.getbyte(0).should == 224
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chr.getbyte(1).should == 166
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chr.getbyte(2).should == 152
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end
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it "mirrors the output of #bytes" do
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xDE = [0xDE].pack('C').force_encoding('utf-8')
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str = "UTF-8 (\u{9865}} characters and hex escapes (#{xDE})"
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str.bytes.to_a.each_with_index do |byte, index|
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str.getbyte(index).should == byte
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end
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end
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it "interprets bytes relative to the String's encoding" do
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str = "\u{333}"
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str.encode('utf-8').getbyte(0).should_not == str.encode('utf-16le').getbyte(0)
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end
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it "returns nil for out-of-bound indexes" do
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"g".getbyte(1).should be_nil
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end
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it "regards the empty String as containing no bytes" do
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"".getbyte(0).should be_nil
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end
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it "raises an ArgumentError unless given one argument" do
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-> { "glark".getbyte }.should raise_error(ArgumentError)
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-> { "food".getbyte(0,0) }.should raise_error(ArgumentError)
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end
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it "raises a TypeError unless its argument can be coerced into an Integer" do
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-> { "a".getbyte('a') }.should raise_error(TypeError)
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end
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end
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