check docker availability before arch support in tests

Author: surayya-MS

src/Tests/Microsoft.NET.Build.Containers.IntegrationTests/ContainerCli.cs

@@ -7,6 +7,8 @@ static class ContainerCli
 {
     public static bool IsPodman => _isPodman.Value;
 
+    public static bool IsAvailable => _isAvailable.Value;
+
     public static RunExeCommand PullCommand(ITestOutputHelper log, params string[] args)
       => CreateCommand(log, "pull", args);
 
@@ -63,4 +65,7 @@ private static RunExeCommand CreateCommand(ITestOutputHelper log, string command
 
     private static readonly Lazy<bool> _isPodman =
       new(() => new DockerCli(loggerFactory: new TestLoggerFactory()).GetCommand() == DockerCli.PodmanCommand);
+
+    private static readonly Lazy<bool> _isAvailable =
+      new(() => new DockerCli(loggerFactory: new TestLoggerFactory()).IsAvailable());
 }

src/Tests/Microsoft.NET.Build.Containers.IntegrationTests/DockerSupportsArchFact.cs

@@ -3,17 +3,17 @@
 
 namespace Microsoft.NET.Build.Containers.IntegrationTests;
 
-public class DockerSupportsArchFactAttribute : FactAttribute
+public class DockerIsAvailableAndSupportsArchFactAttribute : FactAttribute
 {
-    private readonly string _arch;
-
-    public DockerSupportsArchFactAttribute(string arch)
+    public DockerIsAvailableAndSupportsArchFactAttribute(string arch)
     {
-        _arch = arch;
-
-        if (!DockerSupportsArchHelper.DaemonSupportsArch(_arch))
+        if (!DockerSupportsArchHelper.DaemonIsAvailable)
+        {
+            base.Skip = "Skipping test because Docker is not available on this host.";
+        }
+        else if (!DockerSupportsArchHelper.DaemonSupportsArch(arch))
         {
-            base.Skip = $"Skipping test because Docker daemon does not support {_arch}.";
+            base.Skip = $"Skipping test because Docker daemon does not support {arch}.";
         }
     }
 }

src/Tests/Microsoft.NET.Build.Containers.IntegrationTests/DockerSupportsArchInlineData.cs

@@ -34,6 +34,8 @@ public override IEnumerable<object[]> GetData(MethodInfo testMethod)
 
 internal static class DockerSupportsArchHelper
 {
+    internal static bool DaemonIsAvailable => ContainerCli.IsAvailable;
+
     internal static bool DaemonSupportsArch(string arch)
     {
         // an optimization - this doesn't change over time so we can compute it once

src/Tests/Microsoft.NET.Build.Containers.IntegrationTests/EndToEndTests.cs

@@ -722,7 +722,7 @@ public void EndToEnd_SingleArch_NoRid()
         processResultX64.Should().Pass().And.HaveStdOut("Hello, World!");
     }
 
-    [DockerSupportsArchFact("linux/arm64")]
+    [DockerIsAvailableAndSupportsArchFact("linux/arm64")]
     public void EndToEndMultiArch_LocalRegistry()
     {
         string imageName = NewImageName();
@@ -923,7 +923,7 @@ private DirectoryInfo CreateNewProject(string template, [CallerMemberName] strin
     private string GetPublishArtifactsPath(string projectDir, string rid, string configuration = "Debug")
         => Path.Combine(projectDir, "bin", configuration, ToolsetInfo.CurrentTargetFramework, rid, "publish");
 
-    [DockerSupportsArchFact("linux/arm64")]
+    [DockerIsAvailableAndSupportsArchFact("linux/arm64")]
     public void EndToEndMultiArch_ArchivePublishing()
     {
         string imageName = NewImageName();
@@ -996,7 +996,7 @@ public void EndToEndMultiArch_ArchivePublishing()
         newProjectDir.Delete(true);
     }
 
-    [DockerSupportsArchFact("linux/arm64")]
+    [DockerIsAvailableAndSupportsArchFact("linux/arm64")]
     public void EndToEndMultiArch_RemoteRegistry()
     {
         string imageName = NewImageName();
@@ -1125,7 +1125,7 @@ public void EndToEndMultiArch_ContainerRuntimeIdentifiersOverridesRuntimeIdentif
         newProjectDir.Delete(true);
     }
 
-    [DockerSupportsArchFact("linux/arm64")]
+    [DockerIsAvailableAndSupportsArchFact("linux/arm64")]
     public void EndToEndMultiArch_EnvVariables()
     {
         string imageName = NewImageName();
@@ -1192,7 +1192,7 @@ public void EndToEndMultiArch_EnvVariables()
         newProjectDir.Delete(true);
     }
 
-    [DockerSupportsArchFact("linux/arm64")]
+    [DockerIsAvailableAndSupportsArchFact("linux/arm64")]
     public void EndToEndMultiArch_Ports()
     {
         string imageName = NewImageName();