Add Validate method to the IQirSubmitter interface (#799)

* Create Validate member for IQirSubmitter interface.
* Use Validate for --dry-run option when submitting QIR.
* Removed extra blank line.

src/Simulation/Core/Submitters/IQirSubmitter.cs

@@ -24,5 +24,14 @@ public interface IQirSubmitter : IAzureSubmitter
         /// <returns>The submitted job.</returns>
         Task<IQuantumMachineJob> SubmitAsync(
             Stream qir, string entryPoint, IReadOnlyList<Argument> arguments, SubmissionOptions options);
+
+        /// <summary>
+        /// Validates a QIR program for execution on Azure Quantum.
+        /// </summary>
+        /// <param name="qir">The QIR program as a byte stream.</param>
+        /// <param name="entryPoint">The fully-qualified name of the entry point to execute.</param>
+        /// <param name="arguments">The arguments to the entry point in the order in which they are declared.</param>
+        /// <returns><c>null</c> if the program is valid, or an error message otherwise.</returns>
+        string? Validate(Stream qir, string entryPoint, IReadOnlyList<Argument> arguments);
     }
 }

src/Simulation/EntryPointDriver/Azure/Azure.cs

@@ -137,8 +137,8 @@ private static async Task<int> SubmitQir(
 
             if (settings.DryRun)
             {
-                DisplayError("Dry run is not supported with QIR submission.", null);
-                return 1;
+                return DisplayValidation(submitter.Validate(
+                    submission.QirStream, submission.EntryPointName, submission.Arguments));
             }
 
             var job = submitter.SubmitAsync(

src/Simulation/EntryPointDriver/Mock/NoOpQirSubmitter.cs

@@ -26,5 +26,9 @@ internal class NoOpQirSubmitter : IQirSubmitter
         public Task<IQuantumMachineJob> SubmitAsync(
             Stream qir, string entryPoint, IReadOnlyList<Argument> arguments, SubmissionOptions options) =>
             Task.FromResult<IQuantumMachineJob>(new ExampleJob());
+
+        public string? Validate(
+            Stream qir, string entryPoint, IReadOnlyList<Argument> arguments) =>
+            null;
     }
 }

src/Simulation/EntryPointDriver/Mock/NoOpSubmitter.cs

@@ -33,5 +33,9 @@ public Task<IQuantumMachineJob> SubmitAsync<TIn, TOut>(
             Task.FromResult<IQuantumMachineJob>(new ExampleJob());
 
         public string? Validate<TIn, TOut>(EntryPointInfo<TIn, TOut> entryPoint, TIn argument) => null;
+
+        public string? Validate(
+            Stream qir, string entryPoint, IReadOnlyList<Argument> arguments) =>
+            null;
     }
 }