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sync: implement sync.Swap

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This commit is contained in:
Ayke van Laethem
2025-07-31 13:44:13 +02:00
committed by Ron Evans
parent e368551919
commit d6343d9d5c
2 changed files with 31 additions and 0 deletions
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src/sync/map_test.go
+19
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@@ -17,3 +17,22 @@ func TestMapLoadAndDelete(t *testing.T) {
t.Errorf("LoadAndDelete returned %v, %v, want nil, false", v, ok)
}
}
func TestMapSwap(t *testing.T) {
var sm sync.Map
sm.Store("present", "value")
if v, ok := sm.Swap("present", "value2"); !ok || v != "value" {
t.Errorf("Swap returned %v, %v, want value, true", v, ok)
}
if v, ok := sm.Load("present"); !ok || v != "value2" {
t.Errorf("Load after Swap returned %v, %v, want value2, true", v, ok)
}
if v, ok := sm.Swap("new", "foo"); ok || v != nil {
t.Errorf("Swap returned %v, %v, want nil, false", v, ok)
}
if v, ok := sm.Load("present"); !ok || v != "value2" {
t.Errorf("Load after Swap returned %v, %v, want foo, true", v, ok)
}
}