Dynamic data display name (#373)

* Corrected documentation

* Added dynamic display name to DynamicDataAttribute

* Changes requested from PR

* Updated the exception message and added a test for public accessibility

Author: bstoney

src/TestFramework/MSTest.Core/Attributes/DynamicDataAttribute.cs

@@ -56,7 +56,7 @@ public DynamicDataAttribute(string dynamicDataSourceName, DynamicDataSourceType
         /// Initializes a new instance of the <see cref="DynamicDataAttribute"/> class.
         /// </summary>
         /// <param name="dynamicDataSourceName">
-        /// The type in which the test data is declared (as property or in method).
+        /// The name of method or property having test data.
         /// </param>
         /// <param name="dynamicDataDeclaringType">
         /// The declaring type of property or method having data.
@@ -70,6 +70,16 @@ public DynamicDataAttribute(string dynamicDataSourceName, Type dynamicDataDeclar
             this.dynamicDataDeclaringType = dynamicDataDeclaringType;
         }
 
+        /// <summary>
+        /// Gets or sets the name of method used to customize the display name in test results.
+        /// </summary>
+        public string DynamicDataDisplayName { get; set; }
+
+        /// <summary>
+        /// Gets or sets the declaring type used to customize the display name in test results.
+        /// </summary>
+        public Type DynamicDataDisplayNameDeclaringType { get; set; }
+
         /// <inheritdoc />
         public IEnumerable<object[]> GetData(MethodInfo methodInfo)
         {
@@ -131,12 +141,40 @@ public IEnumerable<object[]> GetData(MethodInfo methodInfo)
         /// <inheritdoc />
         public string GetDisplayName(MethodInfo methodInfo, object[] data)
         {
-            if (data != null)
+            if (this.DynamicDataDisplayName != null)
+            {
+                var dynamicDisplayNameDeclaringType = this.DynamicDataDisplayNameDeclaringType ?? methodInfo.DeclaringType;
+
+                var method = dynamicDisplayNameDeclaringType.GetTypeInfo().GetDeclaredMethod(this.DynamicDataDisplayName);
+                if (method == null)
+                {
+                    throw new ArgumentNullException(string.Format("{0} {1}", DynamicDataSourceType.Method, this.DynamicDataDisplayName));
+                }
+
+                var parameters = method.GetParameters();
+                if (parameters.Length != 2 ||
+                    parameters[0].ParameterType != typeof(MethodInfo) ||
+                    parameters[1].ParameterType != typeof(object[]) ||
+                    method.ReturnType != typeof(string) ||
+                    !method.IsStatic ||
+                    !method.IsPublic)
+                {
+                    throw new ArgumentNullException(
+                        string.Format(
+                            FrameworkMessages.DynamicDataDisplayName,
+                            this.DynamicDataDisplayName,
+                            typeof(string).Name,
+                            string.Join(", ", typeof(MethodInfo).Name, typeof(object[]).Name)));
+                }
+
+                return method.Invoke(null, new object[] { methodInfo, data }) as string;
+            }
+            else if (data != null)
             {
                 return string.Format(CultureInfo.CurrentCulture, FrameworkMessages.DataDrivenResultDisplayName, methodInfo.Name, string.Join(",", data.AsEnumerable()));
             }
 
             return null;
         }
     }
-}
+}

src/TestFramework/MSTest.Core/Interfaces/ITestDataSource.cs

@@ -26,7 +26,7 @@ public interface ITestDataSource
         /// Gets the display name corresponding to test data row for displaying in TestResults.
         /// </summary>
         /// <param name="methodInfo">
-        /// The method Info of test method.
+        /// The method info of test method.
         /// </param>
         /// <param name="data">
         /// The test data which is passed to test method.

src/TestFramework/MSTest.Core/Resources/FrameworkMessages.Designer.cs

@@ -283,4 +283,7 @@ Stack Trace: {4}</value>
   <data name="DynamicDataValueNull" xml:space="preserve">
     <value>Value returned by property or method {0} shouldn't be null.</value>
   </data>
+  <data name="DynamicDataDisplayName" xml:space="preserve">
+    <value>Method {0} must match the expected signature: public static {1} {0}({2}).</value>
+  </data>
 </root>

src/TestFramework/MSTest.Core/Resources/FrameworkMessages.resx

@@ -282,6 +282,11 @@ Trasování zásobníku: {4}</target>
         <target state="translated">Hodnota vrácená vlastností nebo metodou {0} by neměla být null.</target>
         <note />
       </trans-unit>
+      <trans-unit id="DynamicDataDisplayName">
+        <source>Method {0} must match the expected signature: public static {1} {0}({2}).</source>
+        <target state="new">Method {0} must match the expected signature: {1} {0}({2}).</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>

src/TestFramework/MSTest.Core/Resources/xlf/FrameworkMessages.cs.xlf

@@ -282,6 +282,11 @@ Stapelüberwachung: {4}</target>
         <target state="translated">Der von der Eigenschaft oder Methode "{0}" zurückgegebene Wert darf nicht NULL sein.</target>
         <note />
       </trans-unit>
+      <trans-unit id="DynamicDataDisplayName">
+        <source>Method {0} must match the expected signature: public static {1} {0}({2}).</source>
+        <target state="new">Method {0} must match the expected signature: {1} {0}({2}).</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>

src/TestFramework/MSTest.Core/Resources/xlf/FrameworkMessages.de.xlf

@@ -282,6 +282,11 @@ Seguimiento de la pila: {4}</target>
         <target state="translated">El valor devuelto por la propiedad o el método {0} no debe ser nulo.</target>
         <note />
       </trans-unit>
+      <trans-unit id="DynamicDataDisplayName">
+        <source>Method {0} must match the expected signature: public static {1} {0}({2}).</source>
+        <target state="new">Method {0} must match the expected signature: {1} {0}({2}).</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>

src/TestFramework/MSTest.Core/Resources/xlf/FrameworkMessages.es.xlf

@@ -282,6 +282,11 @@ Trace de la pile : {4}</target>
         <target state="translated">La valeur retournée par la propriété ou la méthode {0} ne doit pas être Null.</target>
         <note />
       </trans-unit>
+      <trans-unit id="DynamicDataDisplayName">
+        <source>Method {0} must match the expected signature: public static {1} {0}({2}).</source>
+        <target state="new">Method {0} must match the expected signature: {1} {0}({2}).</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>

src/TestFramework/MSTest.Core/Resources/xlf/FrameworkMessages.fr.xlf

@@ -282,6 +282,11 @@ Analisi dello stack: {4}</target>
         <target state="translated">Il valore restituito dalla proprietà o dal metodo {0} non deve essere Null.</target>
         <note />
       </trans-unit>
+      <trans-unit id="DynamicDataDisplayName">
+        <source>Method {0} must match the expected signature: public static {1} {0}({2}).</source>
+        <target state="new">Method {0} must match the expected signature: {1} {0}({2}).</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>

src/TestFramework/MSTest.Core/Resources/xlf/FrameworkMessages.it.xlf

@@ -282,6 +282,11 @@ Stack Trace: {4}</source>
         <target state="translated">プロパティやメソッド {0} によって返される値を null にすることはできません。</target>
         <note />
       </trans-unit>
+      <trans-unit id="DynamicDataDisplayName">
+        <source>Method {0} must match the expected signature: public static {1} {0}({2}).</source>
+        <target state="new">Method {0} must match the expected signature: {1} {0}({2}).</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>