Add update migrations script (#376)

Author: HaoK

migrations/updateMigrations.cmd

@@ -0,0 +1,18 @@
+echo Make sure to have ran build.cmd once to ensure artifacts have been created.
+rd "Company.WebApplication1" /s /q
+mkdir "Company.WebApplication1"
+dotnet new razor --auth Individual -i ..\artifacts\build\Microsoft.DotNet.Web.ProjectTemplates.*.nupkg -o Company.WebApplication1
+copy "Company.WebApplication1\Data\Migrations\*" "..\src\Microsoft.DotNet.Web.ProjectTemplates\content\RazorPagesWeb-CSharp\Data\SqlLite"
+rd "Company.WebApplication1" /s /q
+mkdir "Company.WebApplication1"
+dotnet new razor --auth Individual --use-local-db -i ..\artifacts\build\Microsoft.DotNet.Web.ProjectTemplates.*.nupkg -o Company.WebApplication1
+copy "Company.WebApplication1\Data\Migrations\*" "..\src\Microsoft.DotNet.Web.ProjectTemplates\content\RazorPagesWeb-CSharp\Data\SqlServer"
+rd "Company.WebApplication1" /s /q
+mkdir "Company.WebApplication1"
+dotnet new mvc --auth Individual --use-local-db -i ..\artifacts\build\Microsoft.DotNet.Web.ProjectTemplates.*.nupkg -o Company.WebApplication1
+copy "Company.WebApplication1\Data\Migrations\*" "..\src\Microsoft.DotNet.Web.ProjectTemplates\content\StarterWeb-CSharp\Data\SqlServer"
+rd "Company.WebApplication1" /s /q
+mkdir "Company.WebApplication1"
+dotnet new mvc --auth Individual -i ..\artifacts\build\Microsoft.DotNet.Web.ProjectTemplates.*.nupkg -o Company.WebApplication1
+copy "Company.WebApplication1\Data\Migrations\*" "..\src\Microsoft.DotNet.Web.ProjectTemplates\content\StarterWeb-CSharp\Data\SqlLite"
+rd "Company.WebApplication1" /s /q

test/Templates.Test/Helpers/TemplateTestBase.cs

@@ -107,6 +107,7 @@ protected void AssertDirectoryExists(string path, bool shouldExist)
             }
         }
 
+        // If this fails, you should generate new migrations via migrations/updateMigrations.cmd
         protected void AssertEmptyMigration(string migration)
         {
             var fullPath = Path.Combine(TemplateOutputDir, "Data/Migrations");