Add Attribute to use the Bit Autodata dependency chain

BitAutoDataAttribute is used to mark a Theory as autopopulating
parameters.

Extract common attribute methods to to a helper class. Cannot
inherit a common base, since both require inheriting from different
Xunit base classes to work.

test/Common/AutoFixture/Attributes/BitAutoDataAttribute.cs

@@ -0,0 +1,29 @@
+using System;
+using Xunit.Sdk;
+using AutoFixture;
+using System.Reflection;
+using System.Collections.Generic;
+using Bit.Test.Common.Helpers;
+
+namespace Bit.Test.Common.AutoFixture.Attributes
+{
+    public class BitAutoDataAttribute : DataAttribute
+    {
+        private readonly Func<IFixture> _createFixture;
+        private readonly object[] _fixedTestParameters;
+
+        public BitAutoDataAttribute(params object[] fixedTestParameters) :
+            this(() => new Fixture(), fixedTestParameters)
+        { }
+
+        public BitAutoDataAttribute(Func<IFixture> createFixture, params object[] fixedTestParameters) :
+            base()
+        {
+            _createFixture = createFixture;
+            _fixedTestParameters = fixedTestParameters;
+        }
+
+        public override IEnumerable<object[]> GetData(MethodInfo testMethod)
+            => BitAutoDataAttributeHelpers.GetData(testMethod, _createFixture(), _fixedTestParameters);
+    }
+}

test/Common/AutoFixture/Attributes/MemberAutoDataAttribute.cs

@@ -1,69 +1,27 @@
 using System;
-using Xunit.Sdk;
 using Xunit;
 using AutoFixture;
 using System.Reflection;
-using System.Collections.Generic;
-using AutoFixture.Xunit2;
 using System.Linq;
-using AutoFixture.Kernel;
+using Bit.Test.Common.Helpers;
-using System.Collections;
 
 namespace Bit.Test.Common.AutoFixture.Attributes
 {
-    public class MemberAutoDataAttribute : MemberDataAttributeBase
+    public class BitMemberAutoDataAttribute : MemberDataAttributeBase
     {
         private readonly Func<IFixture> _createFixture;
 
-        public MemberAutoDataAttribute(string memberName, params object[] parameters) :
+        public BitMemberAutoDataAttribute(string memberName, params object[] parameters) :
             this(() => new Fixture(), memberName, parameters)
         { }
 
-        public MemberAutoDataAttribute(Func<IFixture> createFixture, string memberName, params object[] parameters) :
+        public BitMemberAutoDataAttribute(Func<IFixture> createFixture, string memberName, params object[] parameters) :
             base(memberName, parameters)
         {
             _createFixture = createFixture;
         }
 
-        protected override object[] ConvertDataItem(MethodInfo testMethod, object item)
+        protected override object[] ConvertDataItem(MethodInfo testMethod, object item) =>
-        {
+            BitAutoDataAttributeHelpers.GetData(testMethod, _createFixture(), item as object[]).First();
-            var methodParameters = testMethod.GetParameters();
-            var classCustomizations = testMethod.DeclaringType.GetCustomAttributes<BitCustomizeAttribute>().Select(attr => attr.GetCustomization());
-            var methodCustomizations = testMethod.GetCustomAttributes<BitCustomizeAttribute>().Select(attr => attr.GetCustomization());
-
-            var array = item as object[] ?? Array.Empty<object>();
-
-            var fixture = ApplyCustomizations(ApplyCustomizations(_createFixture(), classCustomizations), methodCustomizations);
-            var missingParameters = methodParameters.Skip(array.Length).Select(p => CustomizeAndCreate(p, fixture));
-
-            return array.Concat(missingParameters).ToArray();
-        }
-
-        private static object CustomizeAndCreate(ParameterInfo p, IFixture fixture)
-        {
-            var customizations = p.GetCustomAttributes(typeof(CustomizeAttribute), false)
-                .OfType<CustomizeAttribute>()
-                .Select(attr => attr.GetCustomization(p));
-
-            var context = new SpecimenContext(ApplyCustomizations(fixture, customizations));
-            return context.Resolve(p);
-        }
-
-        private static IFixture ApplyCustomizations(IFixture fixture, IEnumerable<ICustomization> customizations)
-        {
-            var newFixture = new Fixture();
-
-            foreach (var customization in fixture.Customizations.Reverse().Select(b => b.ToCustomization()))
-            {
-                newFixture.Customize(customization);
-            }
-
-            foreach (var customization in customizations)
-            {
-                newFixture.Customize(customization);
-            }
-
-            return newFixture;
-        }
     }
 }

test/Common/Helpers/BitAutoDataAttributeHelpers.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using AutoFixture;
+using AutoFixture.Kernel;
+using AutoFixture.Xunit2;
+using Bit.Test.Common.AutoFixture.Attributes;
+
+namespace Bit.Test.Common.Helpers
+{
+    public static class BitAutoDataAttributeHelpers
+    {
+        public static IEnumerable<object[]> GetData(MethodInfo testMethod, IFixture fixture, object[] fixedTestParamters)
+        {
+            var methodParameters = testMethod.GetParameters();
+            var classCustomizations = testMethod.DeclaringType.GetCustomAttributes<BitCustomizeAttribute>().Select(attr => attr.GetCustomization());
+            var methodCustomizations = testMethod.GetCustomAttributes<BitCustomizeAttribute>().Select(attr => attr.GetCustomization());
+
+            fixedTestParamters = fixedTestParamters ?? Array.Empty<object>();
+
+            fixture = ApplyCustomizations(ApplyCustomizations(fixture, classCustomizations), methodCustomizations);
+            var missingParameters = methodParameters.Skip(fixedTestParamters.Length).Select(p => CustomizeAndCreate(p, fixture));
+
+            return new object[1][] { fixedTestParamters.Concat(missingParameters).ToArray() };
+        }
+
+        public static object CustomizeAndCreate(ParameterInfo p, IFixture fixture)
+        {
+            var customizations = p.GetCustomAttributes(typeof(CustomizeAttribute), false)
+                .OfType<CustomizeAttribute>()
+                .Select(attr => attr.GetCustomization(p));
+
+            var context = new SpecimenContext(ApplyCustomizations(fixture, customizations));
+            return context.Resolve(p);
+        }
+
+        public static IFixture ApplyCustomizations(IFixture fixture, IEnumerable<ICustomization> customizations)
+        {
+            var newFixture = new Fixture();
+
+            foreach (var customization in fixture.Customizations.Reverse().Select(b => b.ToCustomization()))
+            {
+                newFixture.Customize(customization);
+            }
+
+            foreach (var customization in customizations)
+            {
+                newFixture.Customize(customization);
+            }
+
+            return newFixture;
+        }
+    }
+}