test: add unit tests for local cache behavior without Redis in HybridCacheTests

Author: bezzad

src/HybridRedisCache.Test/HybridCacheTests.cs

@@ -1731,4 +1731,52 @@ async Task<int> Lockey(string locKey, int millisecondsDelay)
             }
         }
     }
+
+    [Fact]
+    public async Task Cache_On_Local_Without_Redis_Set_Option_Test()
+    {
+        // Arrange
+        var key1 = UniqueKey;
+        var value1 = "value1";
+
+        await Cache.SetAsync(key1, value1,
+            TimeSpan.FromMilliseconds(100),
+            TimeSpan.FromMinutes(10),
+            redisCacheEnable: false); // without redis caching
+
+        // Act
+        var fetchedValue = await Cache.GetAsync<string>(key1);
+        await Task.Delay(100);
+        var fetchedNullValue = await Cache.GetAsync<string>(key1);
+
+        // Assert
+        Assert.Equal(value1, fetchedValue);
+        Assert.Null(fetchedNullValue); // read from redis, but also redis has been expired
+    }
+    
+    [Fact]
+    public async Task Cache_On_Local_Without_Redis_Set_Entry_Test()
+    {
+        // Arrange
+        var key1 = UniqueKey;
+        var value1 = "value1";
+
+        await Cache.SetAsync(key1, value1, new HybridCacheEntry
+        {
+            FireAndForget = false,
+            LocalCacheEnable = true,
+            RedisCacheEnable = false,  // without redis caching
+            RedisExpiry = TimeSpan.FromMinutes(1),
+            LocalExpiry =  TimeSpan.FromMilliseconds(100)
+        });
+
+        // Act
+        var fetchedValue = await Cache.GetAsync<string>(key1);
+        await Task.Delay(100);
+        var fetchedNullValue = await Cache.GetAsync<string>(key1);
+
+        // Assert
+        Assert.Equal(value1, fetchedValue);
+        Assert.Null(fetchedNullValue); // read from redis, but also redis has been expired
+    }
 }