v/vlib/x/websocket/websocket_test.v

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import x.websocket
import time
struct WebsocketTestResults {
pub mut:
nr_messages int
nr_pong_received int
}
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// tests with internal ws servers
fn test_ws() {
go start_server()
time.sleep_ms(100)
ws_test('ws://localhost:30000') or { assert false }
}
fn start_server() ? {
mut s := websocket.new_server(30000, '')
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// make that in execution test time give time to execute at least one time
s.ping_interval = 1
s.on_connect(fn (mut s websocket.ServerClient) ?bool {
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// here you can look att the client info and accept or not accept
// just returning a true/false
if s.resource_name != '/' {
panic('unexpected resource name in test')
return false
}
return true
}) ?
s.on_message(fn (mut ws websocket.Client, msg &websocket.Message) ? {
match msg.opcode {
.pong { ws.write_str('pong') or { panic(err) } }
else { ws.write(msg.payload, msg.opcode) or { panic(err) } }
}
})
s.on_close(fn (mut ws websocket.Client, code int, reason string) ? {
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// not used
})
s.listen() or { }
}
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// ws_test tests connect to the websocket server from websocket client
fn ws_test(uri string) ? {
eprintln('connecting to $uri ...')
mut test_results := WebsocketTestResults{}
mut ws := websocket.new_client(uri) ?
ws.on_open(fn (mut ws websocket.Client) ? {
ws.pong() ?
assert true
})
ws.on_error(fn (mut ws websocket.Client, err string) ? {
println('error: $err')
// this can be thrown by internet connection problems
assert false
})
ws.on_message_ref(fn (mut ws websocket.Client, msg &websocket.Message, mut res WebsocketTestResults) ? {
println('client got type: $msg.opcode payload:\n$msg.payload')
if msg.opcode == .text_frame {
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smessage := msg.payload.bytestr()
match smessage {
'pong' {
res.nr_pong_received++
}
'a' {
res.nr_messages++
}
else {
assert false
}
}
} else {
println('Binary message: $msg')
}
}, test_results)
ws.connect() or { panic('fail to connect') }
go ws.listen()
text := ['a'].repeat(2)
for msg in text {
ws.write(msg.bytes(), .text_frame) or { panic('fail to write to websocket') }
// sleep to give time to recieve response before send a new one
time.sleep_ms(100)
}
// sleep to give time to recieve response before asserts
time.sleep_ms(1500)
// We expect at least 2 pongs, one sent directly and one indirectly
assert test_results.nr_pong_received >= 2
assert test_results.nr_messages == 2
}