add tests for loading unique metadata method

Author: jjw24

Flow.Launcher.Core/Plugin/PluginConfig.cs

@@ -59,7 +59,7 @@ public static List<PluginMetadata> Parse(string[] pluginDirectories)
             return uniqueList;
         }
 
-        private static (List<PluginMetadata>, List<PluginMetadata>) GetUniqueLatestPluginMetadata(List<PluginMetadata> allPluginMetadata)
+        internal static (List<PluginMetadata>, List<PluginMetadata>) GetUniqueLatestPluginMetadata(List<PluginMetadata> allPluginMetadata)
         {
             var duplicate_list = new List<PluginMetadata>();
             var unique_list = new List<PluginMetadata>();

Flow.Launcher.Test/PluginLoadTest.cs

@@ -0,0 +1,91 @@
+using NUnit.Framework;
+using Flow.Launcher.Core.Plugin;
+using Flow.Launcher.Plugin;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Flow.Launcher.Test
+{
+    [TestFixture]
+    class PluginLoadTest
+    {
+        [Test]
+        public void GivenDuplicatePluginMetadatasWhenLoadedThenShouldReturnOnlyUniqueList()
+        {
+            // Given
+            var duplicateList = new List<PluginMetadata>
+            {
+                new PluginMetadata
+                {
+                    ID = "CEA0TYUC6D3B4085823D60DC76F28855",
+                    Version = "1.0.0"
+                },
+                new PluginMetadata
+                {
+                    ID = "CEA0TYUC6D3B4085823D60DC76F28855",
+                    Version = "1.0.1"
+                },
+                new PluginMetadata
+                {
+                    ID = "CEA0TYUC6D3B4085823D60DC76F28855",
+                    Version = "1.0.2"
+                },
+                new PluginMetadata
+                {
+                    ID = "CEA0TYUC6D3B4085823D60DC76F28855",
+                    Version = "1.0.0"
+                },
+                new PluginMetadata
+                {
+                    ID = "CEA0TYUC6D3B4085823D60DC76F28855",
+                    Version = "1.0.0"
+                },
+                new PluginMetadata
+                {
+                    ID = "CEA0TYUC6D3B7855823D60DC76F28855",
+                    Version = "1.0.0"
+                },
+                new PluginMetadata
+                {
+                    ID = "CEA0TYUC6D3B7855823D60DC76F28855",
+                    Version = "1.0.0"
+                }
+            };
+
+            // When
+            (var unique, var duplicates) = PluginConfig.GetUniqueLatestPluginMetadata(duplicateList);
+            
+            // Then
+            Assert.True(unique.FirstOrDefault().ID == "CEA0TYUC6D3B4085823D60DC76F28855" && unique.FirstOrDefault().Version == "1.0.2");
+            Assert.True(unique.Count() == 1);
+
+            Assert.True(duplicates.Where(x => x.Version != "1.0.2" && x.ID == "CEA0TYUC6D3B4085823D60DC76F28855").Count() == 6);
+        }
+
+        [Test]
+        public void GivenDuplicatePluginMetadatasWithNoUniquePluginWhenLoadedThenShouldReturnEmptyList()
+        {
+            // Given
+            var duplicateList = new List<PluginMetadata>
+            {
+                new PluginMetadata
+                {
+                    ID = "CEA0TYUC6D3B7855823D60DC76F28855",
+                    Version = "1.0.0"
+                },
+                new PluginMetadata
+                {
+                    ID = "CEA0TYUC6D3B7855823D60DC76F28855",
+                    Version = "1.0.0"
+                }
+            };
+
+            // When
+            (var unique, var duplicates) = PluginConfig.GetUniqueLatestPluginMetadata(duplicateList);
+
+            // Then
+            Assert.True(unique.Count() == 0);
+            Assert.True(duplicates.Count() == 2);
+        }
+    }
+}