test(cache): ensure cache expiration, delete, and overwrite behaviors…

cache/client_test.go

@@ -1 +1,67 @@
-package cache_test
+package cache
+
+import (
+	"testing"
+	"time"
+)
+
+func TestPutAndGet(t *testing.T) {
+	c := NewCacheClient(2 * time.Second)
+
+	ok := c.Put("city", "Curitiba")
+	if !ok {
+		t.Fatalf("expected Put to return true, but got false")
+	}
+
+	val, found := c.Get("city")
+	if !found {
+		t.Fatalf("expected to find the item, but did not")
+	}
+
+	if val != "Curitiba" {
+		t.Errorf("expected 'Curitiba', got '%v'", val)
+	}
+}
+
+func TestExpiration(t *testing.T) {
+	c := NewCacheClient(500 * time.Millisecond)
+
+	c.Put("temp", 25)
+	time.Sleep(600 * time.Millisecond)
+	_, found := c.Get("temp")
+	if found {
+		t.Error("expected item to expire, but it was still found")
+	}
+}
+
+func TestDelete(t *testing.T) {
+	c := NewCacheClient(2 * time.Second)
+
+	c.Put("wind", "10 km/h")
+
+	ok := c.Delete("wind")
+	if !ok {
+		t.Fatalf("expected Delete to return true, but got false")
+	}
+
+	_, found := c.Get("wind")
+	if found {
+		t.Error("expected item to be deleted, but it still exists")
+	}
+}
+
+func TestOverwrite(t *testing.T) {
+	c := NewCacheClient(2 * time.Second)
+
+	c.Put("city", "Curitiba")
+	c.Put("city", "Londrina")
+
+	val, found := c.Get("city")
+	if !found {
+		t.Fatal("expected to find the item, but did not")
+	}
+
+	if val != "Londrina" {
+		t.Errorf("expected 'Londrina', got '%v'", val)
+	}
+}