finished unit tests and docstrings

MalwareMultiScan.Backends/Services/Interfaces/IProcessRunner.cs

@@ -0,0 +1,22 @@
+using System.Threading;
+
+namespace MalwareMultiScan.Backends.Services.Interfaces
+{
+    /// <summary>
+    /// Process runner.
+    /// </summary>
+    public interface IProcessRunner
+    {
+        /// <summary>
+        /// Run process till completion.
+        /// </summary>
+        /// <param name="path">Path to binary.</param>
+        /// <param name="arguments">Arguments.</param>
+        /// <param name="token">Cancellation token.</param>
+        /// <param name="standardOutput">Standard output of a process.</param>
+        /// <param name="standardError">Standard error of a process.</param>
+        /// <returns>Exit code.</returns>
+        int RunTillCompletion(string path, string arguments, CancellationToken token,
+            out string standardOutput, out string standardError);
+    }
+}