PCRB follow up client side logic

MesaFabApproval.Client.Test/MockMemoryCacheService.cs

@@ -0,0 +1,18 @@
+using Microsoft.Extensions.Caching.Memory;
+
+using Moq;
+
+namespace MesaFabApproval.Client.Test;
+
+public static class MockMemoryCacheService {
+    public static Mock<IMemoryCache> GetMemoryCache(object expectedValue) {
+        Mock<IMemoryCache> mockMemoryCache = new Mock<IMemoryCache>();
+        mockMemoryCache
+            .Setup(x => x.TryGetValue(It.IsAny<object>(), out expectedValue))
+            .Returns(true);
+        mockMemoryCache
+            .Setup(x => x.CreateEntry(It.IsAny<object>()))
+            .Returns(Mock.Of<ICacheEntry>());
+        return mockMemoryCache;
+    }
+}