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local Dmenu = require 'null-browser.extras.dmenu'
local t = require 'null-browser.test-utils'
describe('class: extras.dmenu', function()
t.before_each(function()
stub(web.uv, 'spawn')
stub(web.uv, 'new_pipe', 0)
stub(web.uv, 'close')
stub(web.uv, 'read_start')
stub(web.uv, 'shutdown')
stub(web.uv, 'write')
end)
describe('#select', function()
context('with default options', function()
it('spawns the dmenu process', function()
local dmenu = Dmenu:new {}
local spawn_proccess_stub = stub(web.uv, 'spawn')
dmenu:select({}, {}, function() end)
assert.stub(spawn_proccess_stub).was.called_with(
'dmenu',
match.shape({ args = {}, stdio = match.table() }),
match.is_function()
)
end)
end)
context('with custom command options', function()
it('spawns the custom dmenu process', function()
local dmenu = Dmenu:new { command = 'some-other-dmenu', args = { 'my-arg' } }
local spawn_proccess_stub = stub(web.uv, 'spawn')
dmenu:select({}, {}, function() end)
assert.stub(spawn_proccess_stub).was.called_with(
'some-other-dmenu',
match.shape({ args = { 'my-arg' }, stdio = match.table() }),
match.is_function()
)
end)
end)
context('when a list is provided', function()
it('writes the list to stdin of process', function()
local dmenu = Dmenu:new {}
local write_data_spy = stub(web.uv, 'write')
dmenu:select({ 'hello', 'world', 'testing' }, {}, function() end)
assert.stub(write_data_spy).was.called_with(0, 'hello\n')
assert.stub(write_data_spy).was.called_with(0, 'world\n')
assert.stub(write_data_spy).was.called_with(0, 'testing\n')
end)
end)
context('when process exits with status code 0', function()
context('when process outputs to stdout', function()
it('calls result callback with output line and no error', function()
local dmenu = Dmenu:new {}
local invoke_process_exit = nil
local on_result = spy.new()
stub(web.uv, 'spawn').invokes(function(_, _, callback)
invoke_process_exit = callback
end)
stub(web.uv, 'read_start').invokes(function(_, callback)
callback(nil, 'user input')
if invoke_process_exit then invoke_process_exit(0) end
end)
dmenu:select({}, {}, on_result)
assert.stub(on_result).was.called_with(nil, 'user input')
end)
end)
context('when process does not output to stdout', function()
it('calls result callback with nil and no error', function()
local dmenu = Dmenu:new {}
local on_result = spy.new()
stub(web.uv, 'spawn').invokes(function(_, _, callback)
callback(0)
end)
dmenu:select({}, {}, on_result)
assert.stub(on_result).was.called_with(nil, nil)
end)
end)
end)
context('when process exits with non-zero status code', function()
context('when process outputs to stdout', function()
it('calls result callback with an error and output line', function()
local dmenu = Dmenu:new {}
local invoke_process_exit = nil
local on_result = spy.new()
stub(web.uv, 'spawn').invokes(function(_, _, callback)
invoke_process_exit = callback
end)
stub(web.uv, 'read_start').invokes(function(_, callback)
callback(nil, 'user input')
if invoke_process_exit then invoke_process_exit(42) end
end)
dmenu:select({}, {}, on_result)
assert.stub(on_result).was.called_with(match.string(), 'user input')
end)
end)
context('when process does not output to stdout', function()
it('calls result callback with an error and nil', function()
local dmenu = Dmenu:new {}
local on_result = spy.new()
stub(web.uv, 'spawn').invokes(function(_, _, callback)
callback(42)
end)
dmenu:select({}, {}, on_result)
assert.stub(on_result).was.called_with(match.string(), nil)
end)
end)
end)
end)
end)
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