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e67d45caa1
This change allows functions to be "idled" or scaled to zero replicas and then be invoked later on. There is a penalty to scaling up - the API gateway proxy will block until the function is ready. A cache is included to off-set the calls to upstream API to check on readiness along with unit tests. Testing via scaling to zero replicas and then invoking function. On Swarm I observed 3 seconds on an Intel Nuc i5 for scaling back from zero replicas. Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>
73 lines
1.3 KiB
Go
73 lines
1.3 KiB
Go
package handlers
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import (
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"testing"
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"time"
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)
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func Test_LastRefreshSet(t *testing.T) {
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before := time.Now()
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fnName := "echo"
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cache := FunctionCache{
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Cache: make(map[string]*FunctionMeta),
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Expiry: time.Millisecond * 1,
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}
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if cache.Cache == nil {
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t.Errorf("Expected cache map to be initialized")
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t.Fail()
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}
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cache.Set(fnName, 1)
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if _, exists := cache.Cache[fnName]; !exists {
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t.Errorf("Expected entry to exist after setting %s", fnName)
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t.Fail()
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}
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if cache.Cache[fnName].LastRefresh.Before(before) {
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t.Errorf("Expected LastRefresh for function to have been after start of test")
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t.Fail()
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}
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}
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func Test_CacheExpiresIn1MS(t *testing.T) {
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fnName := "echo"
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cache := FunctionCache{
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Cache: make(map[string]*FunctionMeta),
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Expiry: time.Millisecond * 1,
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}
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cache.Set(fnName, 1)
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time.Sleep(time.Millisecond * 2)
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_, hit := cache.Get(fnName)
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wantHit := false
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if hit != wantHit {
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t.Errorf("hit, want: %v, got %v", wantHit, hit)
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}
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}
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func Test_CacheGivesHitWithLongExpiry(t *testing.T) {
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fnName := "echo"
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cache := FunctionCache{
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Cache: make(map[string]*FunctionMeta),
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Expiry: time.Millisecond * 500,
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}
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cache.Set(fnName, 1)
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_, hit := cache.Get(fnName)
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wantHit := true
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if hit != wantHit {
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t.Errorf("hit, want: %v, got %v", wantHit, hit)
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}
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}
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