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Contents
require File.expand_path('../../../spec_helper', __FILE__)
ruby_version_is "1.8.8" do
describe "String#setbyte" do
it "returns an Integer" do
"a".setbyte(0,1).should be_kind_of(Integer)
end
it "modifies the receiver" do
str = "glark"
old_id = str.object_id
str.setbyte(0,88)
str.object_id.should == old_id
end
it "changes the byte at the given index to the new byte" do
str = "a"
str.setbyte(0,98)
str.should == 'b'
end
it "allows changing bytes in multi-byte characters" do
str = "\u{915}"
str.setbyte(1,254)
str.getbyte(1).should == 254
end
it "can invalidate a String's encoding" do
str = "glark"
str.valid_encoding?.should be_true
str.setbyte(2,253)
#str.valid_encoding?.should be_false
end
it "regards a negative index as counting from the end of the String" do
str = "hedgehog"
str.setbyte(-3, 108)
str.should == "hedgelog"
end
it "raises an IndexError unless the index is inside the String" do
lambda { "?".setbyte(1,97) }.should raise_error(IndexError)
end
it "raises a RuntimeError if self is frozen" do
str = "cold".freeze
str.frozen?.should be_true
lambda { str.setbyte(3,96) }.should raise_error(RuntimeError)
end
it "raises a TypeError unless the second argument is an Integer" do
lambda { "a".setbyte(0,'a') }.should raise_error(TypeError)
end
end
end
Version data entries
52 entries across 52 versions & 2 rubygems