1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
{-# OPTIONS_GHC -Wall #-}
module Plugins.Monitors.AlsaSpec
( main
, spec
) where
import Control.Concurrent
import Control.Concurrent.Async
import Control.Monad
import Xmobar.Plugins.Monitors.Alsa
import System.FilePath
import System.IO
import System.IO.Temp
import System.Posix.Files
import System.Process
import Test.Hspec
main :: IO ()
main = hspec spec
spec :: Spec
spec = do
describe "Alsa.getWaitMonitor" $
it "produces the expected timeline (using a fake alsactl)"
runFakeAlsactlTest
describe "Alsa.parseOptsIncludingMonitorArgs" $ do
it "works with empty args" $ do
opts <- parseOptsIncludingMonitorArgs []
aoAlsaCtlPath opts `shouldBe` Nothing
it "parses --alsactl=foo" $ do
opts <- parseOptsIncludingMonitorArgs ["--", "--alsactl=foo"]
aoAlsaCtlPath opts `shouldBe` Just "foo"
runFakeAlsactlTest :: Expectation
runFakeAlsactlTest =
withSystemTempDirectory "xmobar-test" $ \tmpDir -> do
let fifoPath = tmpDir </> "fifo"
fakeAlsactlPath = tmpDir </> "fake-alsactl"
writeFile fakeAlsactlPath $
unlines
[ "#!/bin/bash"
, "[[ $1 == monitor ]] || exit 99"
, "exec cat \"$2\""
]
setFileMode fakeAlsactlPath ownerModes
withFifoWriteHandle fifoPath $ \fifo -> do
timeline <- newMVar [] :: IO (MVar [TimelineEntry])
runVolumeCompleted <- newEmptyMVar :: IO (MVar Bool) -- True -> quit
waiterTaskIsRunning <- newEmptyMVar :: IO (MVar ())
waiterTaskIsWaiting <- newEmptyMVar :: IO (MVar ())
withMonitorWaiter fifoPath (Just fakeAlsactlPath) $ \waitFunc -> do
let addToTimeline e = modifyMVar_ timeline (pure . (e :))
emitEvent = do
addToTimeline EventEmitted
hPutStrLn fifo "#17 (2,0,0,Master Playback Volume,0) VALUE"
hFlush fifo
putNow mv val = do
ok <- tryPutMVar mv val
unless ok $ expectationFailure "Expected the MVar to be empty"
simulateRunVolumeCompleted = putNow runVolumeCompleted False
quitWaiter = putNow runVolumeCompleted True
waiterTaskMain = do
addToTimeline RunVolume
putNow waiterTaskIsRunning ()
q <- takeMVar runVolumeCompleted
unless q $ do
addToTimeline Waiting
putNow waiterTaskIsWaiting ()
waitFunc
waiterTaskMain
delay_ms = threadDelay . (* 1000)
withAsync waiterTaskMain $ \waiterTask -> do
takeMVar waiterTaskIsRunning
simulateRunVolumeCompleted
takeMVar waiterTaskIsWaiting
takeMVar waiterTaskIsRunning -- Waiter returns instantly once
simulateRunVolumeCompleted
takeMVar waiterTaskIsWaiting
emitEvent
takeMVar waiterTaskIsRunning
simulateRunVolumeCompleted
takeMVar waiterTaskIsWaiting
let iters = 3
burstSize = 5
replicateM_ iters $ do
emitEvent
takeMVar waiterTaskIsRunning
-- Now more events start to accumulate during runVolume
replicateM_ burstSize emitEvent
delay_ms 250 -- Give the events time to go through the pipe
simulateRunVolumeCompleted
-- runVolume completed and should run once more due to
-- accumulated events
takeMVar waiterTaskIsWaiting
takeMVar waiterTaskIsRunning
simulateRunVolumeCompleted
takeMVar waiterTaskIsWaiting
emitEvent
takeMVar waiterTaskIsRunning
quitWaiter
wait waiterTask
timelineValue <- reverse <$> readMVar timeline
timelineValue `shouldBe`
[RunVolume, Waiting, RunVolume, Waiting, EventEmitted, RunVolume, Waiting]
++ concat
(replicate iters $
[EventEmitted, RunVolume]
++ replicate burstSize EventEmitted
++ [Waiting, RunVolume, Waiting])
++ [EventEmitted, RunVolume]
data TimelineEntry = EventEmitted | Waiting | RunVolume
deriving(Eq)
instance Show TimelineEntry where
show x =
case x of
EventEmitted -> "E"
Waiting -> "W"
RunVolume -> "R"
withFifoWriteHandle :: FilePath -> (Handle -> IO b) -> IO b
withFifoWriteHandle fifoPath body = do
createNamedPipe fifoPath ownerModes
-- Can't seem to get the writing to the FIFO to work internally
withCreateProcess
(proc "bash" ["-c", "cat >> \"$0\"", fifoPath]) {std_in = CreatePipe}
$ \(Just h) _ _ _ -> do
hSetBuffering h LineBuffering
body h
|
