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github_cli/spec/github_cli/pager_spec.rb at master · danieldeb/github_cli · GitHub

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require 'spec_helper'

describe GithubCLI::Pager do

context '#pager_command' do

it 'permits custom commands' do

cmd = 'more'

GithubCLI::System.stub(:command?) { true }

described_class.pager_command(cmd).should == cmd

end

end

context '#page' do

let(:read_io) { stub(:read_io).as_null_object }

let(:write_io) { stub(:write_io).as_null_object }

let(:pager) { described_class.new }

before do

$stdout.stub(:tty?).and_return true

IO.stub(:pipe).and_return [read_io, write_io]

end

context 'child process' do

before { Kernel.stub(:fork) { false } }

it 'pipes to standard output' do

Kernel.stub(:fork) { false}

$stdout.should_receive(:reopen).with(write_io)

$stderr.should_receive(:reopen).with(write_io)

pager.page

end

it 'closes pipe' do

$stdout.stub(:reopen)

$stderr.stub(:reopen)

write_io.should_receive(:close)

read_io.should_receive(:close)

pager.page

end

end

context 'parent process' do

before do

Kernel.stub(:fork) { true }

Kernel.stub(:select)

described_class.stub(:pager_command) { 'less' }

Kernel.stub(:exec)

end

it 'reads from standard output' do

$stdin.should_receive(:reopen).with(read_io)

pager.page

end

it 'closes pipe' do

$stdin.stub(:reopen)

write_io.should_receive(:close)

read_io.should_receive(:close)

pager.page

end

end

end

end # GithubCLI::Pager

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