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cache_test.go
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cache_test.go
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package ttl
import (
"context"
"testing"
"time"
"github.com/davecgh/go-spew/spew"
)
func cleanrw[V any]() *rw[V] {
ctx, cancel := context.WithCancel(context.Background())
return &rw[V]{
ctx,
cancel,
make(<-chan V),
make(chan<- newvalue[V]),
}
}
func Test_cache_write(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
testdata := map[string]struct {
key string
value *rw[any]
}{
"valid": {
"test-key",
cleanrw[any](),
},
}
for name, test := range testdata {
t.Run(name, func(t *testing.T) {
c := NewCache[string, any](ctx, time.Hour, false)
if c == nil {
t.Fatal("Expected valid struct, got NIL")
}
err := c.write(test.key, test.value)
if err != nil {
t.Fatalf("expected success | %s", err.Error())
}
v, ok := c.values[test.key]
if !ok {
t.Fatal("Key not in map")
}
if v != test.value {
t.Fatal("Value does not match specified value")
}
})
}
}
func Test_cache_write_cleaned(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
c := NewCache[string, any](ctx, time.Hour, false)
rw := cleanrw[any]()
if c == nil {
t.Fatal("Expected valid struct, got NIL")
}
c.cleanup()
err := c.write("test", rw)
if err == nil {
t.Fatal("expected failure due to nil value map")
}
}
func Test_cache_write_invalid_value(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
c := NewCache[string, any](ctx, time.Hour, false)
if c == nil {
t.Fatal("Expected valid struct, got NIL")
}
err := c.write("test", nil)
if err == nil {
t.Fatal("expected failure due to nil value")
}
}
func Test_cache_cleanup(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
c := NewCache[string, any](ctx, time.Hour, false)
rw := cleanrw[any]()
if c == nil {
t.Fatal("Expected valid struct, got NIL")
}
err := c.write("test", rw)
if err != nil {
t.Fatalf("expected success | %s", err.Error())
}
c.cleanup()
// Ensure the stored value's context is canceled
select {
case <-time.Tick(time.Minute):
t.Fatal("expected canceled context on value")
case <-rw.ctx.Done():
}
if c.values != nil {
t.Fatalf("cache not properly cleaned up")
}
}
func Test_cache_set(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
c := NewCache[string, string](ctx, time.Hour, false)
if c == nil {
t.Fatal("Expected valid struct, got NIL")
}
timeout := time.Minute
rw := c.set("test", "test", timeout, false)
if rw.cancel == nil ||
rw.ctx == nil ||
rw.read == nil ||
rw.write == nil {
t.Fatalf("invalid rw instantiation | %s", spew.Sdump(rw))
}
select {
case <-ctx.Done():
t.Fatal("expected read")
case v, ok := <-rw.read:
if !ok {
t.Fatal("closed read channel")
}
if v != "test" {
t.Fatalf("invalid internal value; expected 'test' got %s", v)
}
}
select {
case <-ctx.Done():
t.Fatal("expected write")
case rw.write <- newvalue[string]{"test2", timeout}:
}
select {
case <-ctx.Done():
t.Fatal("expected read")
case v, ok := <-rw.read:
if !ok {
t.Fatal("closed read channel")
}
if v != "test2" {
t.Fatalf("invalid internal value; expected 'test2' got %s", v)
}
}
}
func Test_cache_set_closedWrite(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
c := NewCache[string, string](ctx, time.Hour, false)
if c == nil {
t.Fatal("Expected valid struct, got NIL")
}
timeout := time.Minute
rw := c.set("test", "test", timeout, false)
if rw.cancel == nil ||
rw.ctx == nil ||
rw.read == nil ||
rw.write == nil {
t.Fatalf("invalid rw instantiation | %s", spew.Sdump(rw))
}
err := c.write("test", rw)
if err != nil {
t.Fatalf("error writing rw to cache | %s", err.Error())
}
if _, ok := c.values["test"]; !ok {
t.Fatalf("value not in cache")
}
// Close write channel to shut down the rwloop
close(rw.write)
<-time.Tick(time.Second)
if _, ok := c.values["test"]; !ok {
t.Fatalf("value not in cache")
}
}
func Test_cache_set_closedRead(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
che := &Cache[string, string]{
ctx: ctx,
timeout: time.Hour,
extend: false,
values: make(map[string]*rw[string]),
}
if che == nil {
t.Fatal("Expected valid struct, got NIL")
}
timeout := time.Minute
outgoing := make(chan string)
incoming := make(chan newvalue[string])
out := &rw[string]{
ctx: ctx,
cancel: cancel,
read: outgoing,
write: incoming,
}
// Close write channel to shut down the rwloop
close(outgoing)
err := che.write("test", out)
if err != nil {
t.Fatalf("error writing rw to cache | %s", err.Error())
}
if _, ok := che.values["test"]; !ok {
t.Fatalf("value not in cache")
}
che.rwloop(
ctx,
"test",
"test",
outgoing,
incoming,
timeout,
false,
)
if _, ok := che.values["test"]; ok {
t.Fatalf("value still in cache")
}
}