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# -*- encoding: utf-8 -*-
require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "String#ascii_only?" do
describe "with ASCII only characters" do
it "returns true if the encoding is UTF-8" do
[ ["hello", true],
["hello".encode('UTF-8'), true],
["hello".force_encoding('UTF-8'), true],
].should be_computed_by(:ascii_only?)
end
it "returns true if the encoding is US-ASCII" do
"hello".force_encoding(Encoding::US_ASCII).ascii_only?.should be_true
"hello".encode(Encoding::US_ASCII).ascii_only?.should be_true
end
it "returns true for all single-character UTF-8 Strings" do
0.upto(127) do |n|
n.chr.ascii_only?.should be_true
end
end
end
describe "with non-ASCII only characters" do
it "returns false if the encoding is BINARY" do
chr = 128.chr
chr.encoding.should == Encoding::BINARY
chr.ascii_only?.should be_false
end
it "returns false if the String contains any non-ASCII characters" do
[ ["\u{6666}", false],
["hello, \u{6666}", false],
["\u{6666}".encode('UTF-8'), false],
["\u{6666}".force_encoding('UTF-8'), false],
].should be_computed_by(:ascii_only?)
end
it "returns false if the encoding is US-ASCII" do
[ ["\u{6666}".force_encoding(Encoding::US_ASCII), false],
["hello, \u{6666}".force_encoding(Encoding::US_ASCII), false],
].should be_computed_by(:ascii_only?)
end
end
it "returns true for the empty String with an ASCII-compatible encoding" do
"".ascii_only?.should be_true
"".encode('UTF-8').ascii_only?.should be_true
end
it "returns false for the empty String with a non-ASCII-compatible encoding" do
"".force_encoding('UTF-16LE').ascii_only?.should be_false
"".encode('UTF-16BE').ascii_only?.should be_false
end
it "returns false for a non-empty String with non-ASCII-compatible encoding" do
"\x78\x00".force_encoding("UTF-16LE").ascii_only?.should be_false
end
it "returns false when interpolating non ascii strings" do
base = "EU currency is"
base.force_encoding(Encoding::US_ASCII)
euro = "\u20AC"
interp = "#{base} #{euro}"
euro.ascii_only?.should be_false
base.ascii_only?.should be_true
interp.ascii_only?.should be_false
end
it "returns false after appending non ASCII characters to an empty String" do
("" << "λ").ascii_only?.should be_false
end
it "returns false when concatenating an ASCII and non-ASCII String" do
"".concat("λ").ascii_only?.should be_false
end
it "returns false when replacing an ASCII String with a non-ASCII String" do
"".replace("λ").ascii_only?.should be_false
end
end
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