(chocolatey#2899) Error on missing input for info command

Previously when you ran the choco info command without passing a
package id chocolatey would report 0 packages found.

This commit validates the package count and throws an error if either
of the following conditions exist:

No package id was passed, or multiple package ids were passed.

src/chocolatey/infrastructure.app/commands/ChocolateyInfoCommand.cs

@@ -16,7 +16,9 @@
 
 namespace chocolatey.infrastructure.app.commands
 {
+    using System;
     using System.Collections.Generic;
+    using System.Linq;
     using attributes;
     using commandline;
     using configuration;
@@ -83,6 +85,24 @@ public override void handle_additional_argument_parsing(IList<string> unparsedAr
             configuration.ListCommand.Exact = true;
         }
 
+        public override void handle_validation(ChocolateyConfiguration configuration)
+        {
+            base.handle_validation(configuration);
+
+            if (string.IsNullOrWhiteSpace(configuration.Input))
+            {
+                throw new ApplicationException(@"A single package id is required to run the info again.");
+            }
+
+            //Validate only a single package has been passed to info
+            //TODO: Provide ability to get info on a list of packages
+            string[] input = configuration.Input.Split(' ');
+            if (input.Count() > 1)
+            {
+                throw new ApplicationException(@"This command only accepts a single package id.");
+            }
+        }
+
         public override void help_message(ChocolateyConfiguration configuration)
         {
             this.Log().Info(ChocolateyLoggers.Important, "Info Command");