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require File.expand_path('../../../spec_helper', __FILE__)
require 'expect'
describe "IO#expect" do
before :each do
@read, @write = IO.pipe
end
after :each do
@read.close unless @read.closed?
@write.close unless @write.closed?
end
it "matches data against a Regexp" do
@write << "prompt> hello"
result = @read.expect(/[pf]rompt>/)
result.should == ["prompt>"]
end
it "matches data against a String" do
@write << "prompt> hello"
result = @read.expect("prompt>")
result.should == ["prompt>"]
end
it "returns any captures of the Regexp" do
@write << "prompt> hello"
result = @read.expect(/(pro)mpt(>)/)
result.should == ["prompt>", "pro", ">"]
end
it "returns raises IOError if the IO is closed" do
@write << "prompt> hello"
@read.close
lambda {
@read.expect("hello")
}.should raise_error(IOError)
end
it "returns nil if eof is hit" do
@write << "pro"
@write.close
@read.expect("prompt").should be_nil
end
it "yields the result if a block is given" do
@write << "prompt> hello"
res = nil
@read.expect("prompt>") { |x| res = x }
res.should == ["prompt>"]
end
end
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