Merge PR 314 (Wind010)

Author: moh-hassan

src/CommandLine/Core/ReflectionExtensions.cs

@@ -100,10 +100,18 @@ private static IEnumerable<Error> SetValue<T>(this SpecificationProperty specPro
             {
                 return new[] { new SetValueExceptionError(specProp.Specification.FromSpecification(), e.InnerException, value) };
             }
+            catch (ArgumentException e)
+            {
+                var argEx = new ArgumentException(InvalidAttributeConfigurationError.ErrorMessage, e);
+
+                return new[] { new SetValueExceptionError(specProp.Specification.FromSpecification(), argEx, value) };
+            }
+
             catch (Exception e)
             {
-                 return new[] { new SetValueExceptionError(specProp.Specification.FromSpecification(), e, value) };
+                return new[] { new SetValueExceptionError(specProp.Specification.FromSpecification(), e, value) };
             }
+
         }
 
         public static object CreateEmptyArray(this Type type)
@@ -202,4 +210,4 @@ public static bool IsPrimitiveEx(this Type type)
                 || Convert.GetTypeCode(type) != TypeCode.Object;
         }
     }
-}
+}

src/CommandLine/Error.cs

@@ -64,7 +64,13 @@ public enum ErrorType
         /// <summary>
         /// Value of <see cref="CommandLine.SetValueExceptionError"/> type.
         /// </summary>
-        SetValueExceptionError
+
+        SetValueExceptionError,
+        /// <summary>
+        /// Value of <see cref="CommandLine.InvalidAttributeConfigurationError"/> type.
+        /// </summary>
+        InvalidAttributeConfigurationError
+
     }
 
     /// <summary>
@@ -506,6 +512,18 @@ public object Value
         {
             get { return value; }
         }
+    }
+
+    /// <summary>
+    /// Models an error generated when an invalid token is detected.
+    /// </summary>
+    public sealed class InvalidAttributeConfigurationError : Error
+    {
+        public const string ErrorMessage = "Check if Option or Value attribute values are set properly for the given type.";
 
+        internal InvalidAttributeConfigurationError()
+            : base(ErrorType.InvalidAttributeConfigurationError, true)
+        {
+        }
     }
-}
+}

tests/CommandLine.Tests/Fakes/Options_With_InvalidDefaults.cs

@@ -0,0 +1,11 @@
+
+namespace CommandLine.Tests.Fakes
+{
+    class Options_With_InvalidDefaults
+    {
+        // Default of string and integer type property will also throw.
+
+        [Option(Default = false)]
+        public string FileName { get; set; }
+    }
+}

tests/CommandLine.Tests/Unit/Core/InstanceBuilderTests.cs

@@ -1007,6 +1007,22 @@ public void Parse_option_with_exception_thrown_from_setter_generates_SetValueExc
             // Teardown
         }
 
+        [Fact]
+        public void Parse_default_bool_type_string_SetValueExceptionError()
+        {
+            // Fixture setup
+            string name = nameof(Options_With_InvalidDefaults.FileName).ToLower();
+            var expectedResult = new[] { new SetValueExceptionError(new NameInfo("", name),
+                new ArgumentException(InvalidAttributeConfigurationError.ErrorMessage), "bad") };
+
+            // Exercize system 
+            var result = InvokeBuild<Options_With_InvalidDefaults>(
+                new[] { name, "bad" });
+
+            // Verify outcome
+            ((NotParsed<Options_With_InvalidDefaults>)result).Errors.Should().BeEquivalentTo(expectedResult);
+        }
+
 
         [Theory]
         [InlineData(new[] { "--stringvalue", "x-" }, "x-")]
@@ -1133,6 +1149,7 @@ public void Parse_TimeSpan()
             // Teardown
         }
 
+
         [Fact]
         public void OptionClass_IsImmutable_HasNoCtor()
         {