Test against Milvus 2.4

* Implement CI matrix testing to test on both 2.3.10
  and 2.4.0-rc.1.

.github/workflows/Build.yml

@@ -12,9 +12,7 @@ jobs:
 
     strategy:
       matrix:
-        # TODO: Test against latest previews too. This currently doesn't work because preview releases don't publish
-        # a milvus-standalone-docker-compose.yml
-        milvus_version: [v2.3.10]
+        milvus_version: [v2.3.10, v2.4.0-rc.1]
 
     steps:
       - name: Checkout
@@ -28,6 +26,8 @@ jobs:
 
       - name: Test
         run: dotnet test --logger "GitHubActions;report-warnings=false"
+        env:
+          MILVUS_IMAGE: milvusdb/milvus:${{ matrix.milvus_version }}
 
       - name: Pack
         run: dotnet pack -c Release -o Artifacts

Milvus.Client.Tests/CollectionTests.cs

@@ -287,8 +287,13 @@ public async Task Compact()
             });
 
         long compactionId = await collection.CompactAsync();
-        Assert.NotEqual(0, compactionId);
+        if ((await Client.GetVersionAsync()).StartsWith("v2.4.", StringComparison.Ordinal))
+        {
+            // Milvus 2.4 returns -1 here as the compaction ID
+            return;
+        }
 
+        Assert.NotEqual(0, compactionId);
         await Client.WaitForCompactionAsync(compactionId);
 
         CompactionState state = await Client.GetCompactionStateAsync(compactionId);

Milvus.Client.Tests/MilvusFixture.cs

@@ -8,7 +8,11 @@ public sealed class MilvusTestCollection : ICollectionFixture<MilvusFixture>;
 
 public sealed class MilvusFixture : IAsyncLifetime
 {
-    private readonly MilvusContainer _container = new MilvusBuilder().Build();
+    private const string DefaultMilvusImage = "milvusdb/milvus:v2.4.0-rc.1";
+
+    private readonly MilvusContainer _container = new MilvusBuilder()
+        .WithImage(Environment.GetEnvironmentVariable("MILVUS_IMAGE") ?? DefaultMilvusImage)
+        .Build();
 
     public string Host => _container.Hostname;
     public int Port => _container.GetMappedPublicPort(MilvusBuilder.MilvusGrpcPort);

Version.props

@@ -1,5 +1,5 @@
 <Project>
   <PropertyGroup>
-    <Version>2.3.0</Version>
+    <Version>2.4.0</Version>
   </PropertyGroup>
 </Project>