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require 'test/unit'
require 'tmpdir'
class TestWhileuntil < Test::Unit::TestCase
def test_while
tmpfilename = "#{Dir.tmpdir}/ruby_while_tmp.#{$$}"
tmp = open(tmpfilename, "w")
tmp.print "tvi925\n";
tmp.print "tvi920\n";
tmp.print "vt100\n";
tmp.print "Amiga\n";
tmp.print "paper\n";
tmp.close
tmp = open(tmpfilename, "r")
assert_instance_of(File, tmp)
while line = tmp.gets()
break if /vt100/ =~ line
end
assert(!tmp.eof?)
assert_match(/vt100/, line)
tmp.close
tmp = open(tmpfilename, "r")
while line = tmp.gets()
next if /vt100/ =~ line
assert_no_match(/vt100/, line)
end
assert(tmp.eof?)
assert_no_match(/vt100/, line)
tmp.close
tmp = open(tmpfilename, "r")
while line = tmp.gets()
lastline = line
line = line.gsub(/vt100/, 'VT100')
if lastline != line
line.gsub!('VT100', 'Vt100')
redo
end
assert_no_match(/vt100/, line)
assert_no_match(/VT100/, line)
end
assert(tmp.eof?)
tmp.close
sum=0
for i in 1..10
sum += i
i -= 1
if i > 0
redo
end
end
assert_equal(220, sum)
tmp = open(tmpfilename, "r")
while line = tmp.gets()
break if 3
assert_no_match(/vt100/, line)
assert_no_match(/Amiga/, line)
assert_no_match(/paper/, line)
end
tmp.close
File.unlink tmpfilename or `/bin/rm -f "#{tmpfilename}"`
assert(!File.exist?(tmpfilename))
end
def test_until
i = 0
until i>4
i+=1
end
assert(i>4)
end
end
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