feat: implemented poke api client with cache

internal/pokecache/cache_test.go

@@ -0,0 +1,64 @@
+package pokecache_test
+
+import (
+	"testing"
+	"time"
+
+	"github.com/StevanFreeborn/pokedexcli/internal/pokecache"
+)
+
+func TestNewCache(t *testing.T) {
+	t.Run("it should return new initialized cache", func(t *testing.T) {
+		cache := pokecache.NewCache(5 * time.Second)
+		defer cache.Stop()
+
+		if cache == nil {
+			t.Errorf("expected result to be non nil value")
+		}
+	})
+
+	t.Run("it should start reaping loop", func(t *testing.T) {
+		interval := 1 * time.Second
+		wait := interval + 1
+		key := "key"
+		bytes := []byte("Hello World")
+
+		cache := pokecache.NewCache(1 * time.Second)
+		defer cache.Stop()
+
+		cache.Add(key, bytes)
+
+		time.Sleep(wait)
+
+		_, found := cache.Get(key)
+
+		if found {
+			t.Errorf("expected entry for key %s to have been reaped", key)
+		}
+	})
+}
+
+func TestAdd(t *testing.T) {
+	t.Run("it should add entry to cache and allow retrieving entry", func(t *testing.T) {
+		key := "key"
+		bytes := []byte("Hello World")
+
+		cache := pokecache.NewCache(5 * time.Second)
+		defer cache.Stop()
+
+		cache.Add(key, bytes)
+
+		result, found := cache.Get(key)
+
+		if !found {
+			t.Errorf("expected to find entry for key %s", key)
+		}
+
+		expected := string(bytes)
+		strResult := string(result)
+
+		if strResult != expected {
+			t.Errorf("expected to find value %s for key %s but received %s", expected, key, strResult)
+		}
+	})
+}