func (s *S) TearDownTest(c *C) {
s.engine.Destroy()
retries := 30 // Three seconds top.
for {
// Do not call qml.Flush here. It creates a nested event loop
// that attempts to process the deferred object deletes and cannot,
// because deferred deletes are only processed at the same loop level.
// So it *reposts* the deferred deletion event, in practice *preventing*
// these objects from being deleted.
runtime.GC()
stats := qml.Stats()
if stats.EnginesAlive == 0 && stats.ValuesAlive == 0 && stats.ConnectionsAlive == 0 {
break
}
if retries == 0 {
panic(fmt.Sprintf("there are values alive:\n%#v\n", stats))
}
retries--
time.Sleep(100 * time.Millisecond)
if retries%10 == 0 {
c.Logf("There are still objects alive; waiting for them to die: %#v\n", stats)
}
}
qml.SetLogger(nil)
}
func (s *S) SetUpTest(c *C) {
qml.SetLogger(c)
qml.CollectStats(true)
qml.ResetStats()
stats := qml.Stats()
if stats.EnginesAlive > 0 || stats.ValuesAlive > 0 || stats.ConnectionsAlive > 0 {
panic(fmt.Sprintf("Test started with values alive: %#v\n", stats))
}
s.engine = qml.NewEngine()
s.context = s.engine.Context()
}
`,
Done: func(c *TestData) {
c.Check(c.root.Call("f").(qml.Object).Int("width"), Equals, 300)
},
},
{
Summary: "Call a QML method that holds a custom type past the return point",
QML: `
Item {
property var held
function hold(v) { held = v; gc(); gc(); }
function log() { console.log("String is", held.stringValue) }
}`,
Done: func(c *TestData) {
value := GoType{StringValue: "<content>"}
stats := qml.Stats()
c.root.Call("hold", &value)
c.Check(qml.Stats().ValuesAlive, Equals, stats.ValuesAlive+1)
c.root.Call("log")
c.root.Call("hold", nil)
c.Check(qml.Stats().ValuesAlive, Equals, stats.ValuesAlive)
},
DoneLog: "String is <content>",
},
{
Summary: "Call a non-existent QML method",
QML: `Item {}`,
Done: func(c *TestData) {
c.Check(func() { c.root.Call("add", 1, 2) }, Panics, `object does not expose a method "add"`)
},
},