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package context
import (
"sync"
"testing"
"github.com/stretchr/testify/assert"
)
func TestStack(t *testing.T) {
cm := NewManager()
_cm := cm.(*manager)
// Put globals first
cm.PutGlobal("a", -1) // This will get overriden in specific contexts
cm.PutGlobal("ga", "i")
cm.PutGlobalDynamic("gb", func() interface{} { return "ii" })
cm.PutGlobalDynamic("gm", func() interface{} { return map[string]interface{}{"gm3": "iii", "gm4": "iv"} })
// Use a Map as a Contextual
var contextual = Map{
"a": 0, // This will override whatever is in specific contexts
"contextual": "special",
}
c := cm.Enter()
c.Put("a", 1)
penultimate := cm.Enter().
Put("b", 2)
c = cm.Enter().
PutDynamic("c", func() interface{} { return 4 }).
PutIfAbsent("d", 5).
PutIfAbsent("a", 11)
// Put something in the penultimate context and make sure it doesn't override
// what's set in the ultimate context
penultimate.Put("c", 3)
var assertMutex sync.Mutex
doAssertContents := func(expected Map, actual Map, scope string) {
assertMutex.Lock()
assert.Equal(t, expected, actual, scope)
assertMutex.Unlock()
}
assertContents := func(expected Map) {
doAssertContents(expected, cm.AsMap(nil, false), "AsMapwith(nil, false)")
expected["ga"] = "i"
expected["gb"] = "ii"
expected["gm3"] = "iii"
expected["gm4"] = "iv"
_, exists := expected["a"]
if !exists {
expected["a"] = -1
}
doAssertContents(expected, cm.AsMap(nil, true), "AsMap(nil, true)")
expected["a"] = 0
expected["contextual"] = "special"
doAssertContents(expected, cm.AsMap(contextual, true), "AsMapWith(contextual, true)")
delete(expected, "ga")
delete(expected, "gb")
delete(expected, "gm3")
delete(expected, "gm4")
doAssertContents(expected, cm.AsMap(contextual, false), "AsMapWith(contextual, false)")
}
assertContents(Map{
"a": 1,
"b": 2,
"c": 4,
"d": 5,
})
var wg sync.WaitGroup
wg.Add(1)
cm.Go(func() {
defer cm.Enter().Put("e", 6).Exit()
assertContents(Map{
"a": 1,
"b": 2,
"c": 4,
"d": 5,
"e": 6,
})
wg.Done()
})
wg.Wait()
wg.Add(1)
cm.Go(func() {
// This goroutine doesn't Exit. Still, we shouldn't leak anything.
wg.Done()
})
wg.Wait()
assertContents(Map{
"a": 1,
"b": 2,
"c": 4,
"d": 5,
})
c.Exit()
c = _cm.currentContext()
assert.NotNil(t, c)
assertContents(Map{
"a": 1,
"b": 2,
"c": 3,
})
c.Exit()
c = _cm.currentContext()
assert.NotNil(t, c)
assertContents(Map{
"a": 1,
})
// Last exit
c.Exit()
assert.Nil(t, _cm.currentContext())
assertContents(Map{})
// Exit again, just for good measure
c.Exit()
assert.Nil(t, _cm.currentContext())
assertContents(Map{})
// Spawn a goroutine with no existing contexts
wg.Add(1)
cm.Go(func() {
defer cm.Enter().Put("f", 7).Exit()
assertContents(Map{
"f": 7,
})
wg.Done()
})
wg.Wait()
_cm.mxContexts.Lock()
assert.Empty(t, _cm.contexts, "No contexts should be left")
_cm.mxContexts.Unlock()
}
func BenchmarkPut(b *testing.B) {
cm := NewManager()
c := cm.Enter()
b.ResetTimer()
for i := 0; i < b.N; i++ {
c.Put("key", "value")
}
}
func BenchmarkAsMap(b *testing.B) {
cm := NewManager()
cm.Enter().Put("a", 1).Put("b", 2)
b.ResetTimer()
for i := 0; i < b.N; i++ {
cm.AsMap(nil, true)
}
}
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