Merge pull request #322 from smadala/results-dir-arg

Author: smadala

scripts/build.ps1

@@ -59,7 +59,7 @@ $env:DOTNET_SKIP_FIRST_TIME_EXPERIENCE = 1
 # Dotnet build doesn't support --packages yet. See https://github.com/dotnet/cli/issues/2712
 $env:NUGET_PACKAGES = $env:TP_PACKAGES_DIR
 $env:NUGET_EXE_Version = "3.4.3"
-$env:DOTNET_CLI_VERSION = "latest"
+$env:DOTNET_CLI_VERSION = "1.0.0-preview5-004384"
 
 #
 # Build configuration

src/Microsoft.TestPlatform.CoreUtilities/ValidateArg.cs

@@ -74,6 +74,32 @@ public static string NotNullOrEmpty([ValidatedNotNull]string arg, string paramet
             return arg;
         }
 
+        /// <summary>
+        /// Validate a string is not null, empty or consists only of white-space characters.
+        /// </summary>
+        /// <param name="arg">
+        /// Input string.
+        /// </param>
+        /// <param name="parameterName">
+        /// Name of the parameter to validate.
+        /// </param>
+        /// <returns>
+        /// Validated string.
+        /// </returns>
+        /// <exception cref="ArgumentNullException">
+        /// Thrown if the input string is null null, empty or consists only of white-space characters.
+        /// </exception>
+        [DebuggerStepThrough]
+        public static string NotNullOrWhiteSpace([ValidatedNotNull]string arg, string parameterName)
+        {
+            if (string.IsNullOrWhiteSpace(arg))
+            {
+                throw new ArgumentNullException(parameterName);
+            }
+
+            return arg;
+        }
+
         /// <summary>
         /// Throws ArgumentOutOfRangeException if the argument is less than zero.
         /// </summary>