local hglib = require 'hglib'
describe('hglib helper functions', function()
	describe('decode_i4', function()
		it('can decode 0', function()
			assert.are_equal(0, hglib.decode_i4('\0\0\0\0'))
		end)
		it('can decode 255', function()
			assert.are_equal(255, hglib.decode_i4('\0\0\0\255'))
		end)
		it('can decode 256', function()
			assert.are_equal(256, hglib.decode_i4('\0\0\1\0'))
		end)
		it('can decode -1', function()
			assert.are_equal(-1, hglib.decode_i4('\255\255\255\255'))
		end)
	end)
end)
describe('hglib client', function()
	it('can connect using just file handles', function()
		local rh = assert(io.open('spec/data/hello', 'rb'))
		local client = hglib.Client.connect(rh, nil)
		client:close()
		assert.are_equal('closed file', io.type(rh))
		assert.is_true(client.capabilities.getencoding)
		assert.is_true(client.capabilities.runcommand)
		assert.are_equal('UTF-8', client.encoding)
		assert.are_equal(3615, client.pid)
		assert.are_equal(3615, client.pgid)
	end)
	it('can launch a new cmdserver process', function()
		local client = hglib.Client.open()
		assert.is_true(client.capabilities.getencoding)
		assert.is_true(client.capabilities.runcommand)
		assert.are_equal('string', type(client.encoding))
		assert.are_equal('number', type(client.pid))
		assert.are_equal('number', type(client.lpcpid))
		assert.are_equal('file', io.type(client.rh))
		assert.are_equal('file', io.type(client.wh))
		client:close()
	end)
	it('can use getencoding', function()
		local client = hglib.Client.open()
		local encoding, err = client:getencoding()
		client:close()
		assert.is_nil(err)
		assert.are_equal('string', type(encoding))
	end)
	it('can use runcommand to request version', function()
		local client = hglib.Client.open()
		local code, o, e, d = client:runcommand({'version', '--verbose'})
		client:close()
		assert.is_not_nil(o:find('Mercurial Distributed SCM'))
		assert.is_not_nil(o:find('Enabled extensions:'))
		assert.are_equal('', e)
		assert.are_equal('', d)
		assert.are_equal(0, code)
	end)
	it('can use runcommand to run nonexistent command', function()
		local client = hglib.Client.open()
		local code, o, e, d = client:runcommand({'extirpate'})
		client:close()
		assert.is_not_nil(o:find('hg help'))
		assert.is_not_nil(o:find('for the full list of commands'))
		assert.is_not_nil(e:find('unknown command'))
		assert.are_equal('', d)
		assert.are_equal(255, code)
	end)
	it('can use runcommand to inspect this repo', function()
		local client = hglib.Client.open('.')
		local code, o, e, d = client:runcommand({'log', '-r0'})
		client:close()
		assert.is_not_nil(o:find('hglib: absolute basics'))
		assert.are_equal('', e)
		assert.are_equal('', d)
		assert.are_equal(0, code)
	end)
	it('can use runcommand to import a patch and run summary', function()
		local client = hglib.Client.open()
		do
			local code, o, e, d = client:runcommand({'init', 'testrepo'})
			finally(function() os.execute('rm -r testrepo') end)
			assert.are_equal('', o)
			assert.are_equal('', e)
			assert.are_equal('', d)
			assert.are_equal(0, code)
		end
		do
			local code, o, e, d = client:runcommand({'-R', 'testrepo', 'import', '-'})
			assert.is_not_nil(o:find('applying patch from stdin'))
			assert.is_not_nil(e:find('abort: stdin: no diffs found'))
			assert.are_equal('', d)
			assert.are_equal(255, code)
		end
		do
			local pf = assert(io.open('spec/data/foo.patch', 'rb'))
			local patch = pf:read('*all')
			pf:close()
			local code, o, e, d = client:runcommand({'-R', 'testrepo', 'import', '-'}, patch)
			assert.is_not_nil(o:find('applying patch from stdin'))
			assert.are_equal('', e)
			assert.are_equal('', d)
			assert.are_equal(0, code)
		end
		do
			local code, o, e, d = client:runcommand({'-R', 'testrepo', 'summary'})
			assert.is_nil(o:find('empty repository'))
			assert.is_not_nil(o:find('parent: 0:[0-9a-f]+ tip'))
			assert.are_equal('', e)
			assert.are_equal('', d)
			assert.are_equal(0, code)
		end
		client:close()
	end)
	it('can use runcommand_co to request version', function()
		local client = hglib.Client.open()
		local co, err = client:runcommand_co({'version'})
		assert.is_not_nil(co)
		assert.are_equal('thread', type(co))
		assert.are_equal('suspended', coroutine.status(co))
		assert.is_nil(err)
		local channels = {}
		while coroutine.status(co) ~= 'dead' do
			local status, channel = coroutine.resume(co)
			assert.is_true(status)
			table.insert(channels, channel)
		end
		client:close()
		assert.are_equal('o', channels[1])
		assert.are_equal('r', channels[#channels])
	end)
end)