Add Linux as CI in appveyor (#598)

Author: moh-hassan

README.md

@@ -30,16 +30,17 @@ __This library provides _hassle free_ command line parsing with a constantly upd
 - Verbs can be array of types collected from Plugins or IoC container.
 - Define [verb commands](https://github.com/commandlineparser/commandline/wiki/Verbs) similar to `git commit -a`.
 - Support default verb.
-- Support Mutable and Imutable types.
+- Support Mutable and Immutable types.
 - Support HelpText localization.
 - Support ordering of options in HelpText.
 - Support [Mutually Exclusive Options](https://github.com/commandlineparser/commandline/wiki/Mutually-Exclusive-Options) and Options groups.
 - Support named and value options.
 - Support Asynchronous programming with async and await.
 - Unparsing support: `CommandLine.Parser.Default.FormatCommandLine<T>(T options)`.
 - CommandLineParser.FSharp package is F#-friendly with support for `option<'a>`, see [demo](https://github.com/commandlineparser/commandline/blob/master/demo/fsharp-demo.fsx).  _NOTE: This is a separate NuGet package._
-- Include good wiki documentation with lot of examples ready to run online.
-- Support Sourcelink and symbolic package.
+- Include wiki documentation with lot of examples ready to run online.
+- Support Source Link and symbolic nuget package snupkg.
+- Tested in Windows, Linux Ubuntu 18.04 and Mac OS.
 - Most of features applies with a [CoC](http://en.wikipedia.org/wiki/Convention_over_configuration) philosophy.
 - C# demo: source [here](https://github.com/commandlineparser/commandline/tree/master/demo/ReadText.Demo).
 

appveyor.yml

@@ -1,7 +1,9 @@
 #version should be only changed with RELEASE eminent, see RELEASE.md
 
 version: 2.8.0-ci-{build}
-image: Visual Studio 2019
+image:
+  - Visual Studio 2019
+  - ubuntu1804
 
 clone_depth: 1
 pull_requests:
@@ -26,8 +28,7 @@ skip_commits:
   files:
     - docs/*
     - art/*
-    - '**/*.md'
-    #- .travis.yml
+    - '**/*.md'    
     - .gitignore
     - .editorconfig
   message: /updated readme.*|update readme.*s|update docs.*|update version.*|update changelog.*/
@@ -39,12 +40,15 @@ environment:
 
 build_script:
 - cmd: dotnet build src/CommandLine/ -c Release --version-suffix %PACKAGE_VERSION% /p:BuildTarget=%BUILD_TARGET%
+- sh: dotnet build src/CommandLine/ -c Release --version-suffix $PACKAGE_VERSION /p:BuildTarget=$BUILD_TARGET
 
 test_script: 
 - cmd: dotnet test tests/CommandLine.Tests/ /p:BuildTarget=%BUILD_TARGET%
+- sh: dotnet test tests/CommandLine.Tests/ /p:BuildTarget=$BUILD_TARGET  -f netcoreapp2.0
 
 after_test:
 - cmd: dotnet pack src/CommandLine/ -c Release --version-suffix %PACKAGE_VERSION% /p:BuildTarget=%BUILD_TARGET%
+- sh: dotnet pack src/CommandLine/ -c Release --version-suffix $PACKAGE_VERSION /p:BuildTarget=$BUILD_TARGET
 
 artifacts:
 - path: 'src/CommandLine/bin/Release/*.nupkg'
@@ -56,20 +60,25 @@ on_failure:
     tree /f /a >files.lst
     appveyor PushArtifact .\files.lst -DeploymentName "Failed Build File Listing"
 
-deploy:
-- provider: GitHub
-  auth_token:
-    secure: hVyVwHl0JiVq0VxXB4VMRWbUtrGclIzadfnWFcWCQBLvbgMLahLBnWlwGglT63pZ
-  artifact: 'NuGetPackages'
-  prerelease: false
-  force_update: true #fsharp package runs as separate build job, so have to force_update to add fsharp.nuget added
-  on:
-    APPVEYOR_REPO_TAG: true
+for:
+-
+  matrix:
+    only:
+      - image: Visual Studio 2019
+  deploy:
+  - provider: GitHub
+    auth_token:
+      secure: hVyVwHl0JiVq0VxXB4VMRWbUtrGclIzadfnWFcWCQBLvbgMLahLBnWlwGglT63pZ
+    artifact: 'NuGetPackages'
+    prerelease: false
+    force_update: true #fsharp package runs as separate build job, so have to force_update to add fsharp.nuget added
+    on:
+      APPVEYOR_REPO_TAG: true
 
-- provider: NuGet
-  api_key:
-    secure: Ab4T/48EyIJhVrqkfKdUxmHUtseEVuXuyrGACxZ0KN35rb/BzABlBM2YjZojicvT
-  artifact: 'NuGetPackages'
-  on:
-    APPVEYOR_REPO_TAG: true
+  - provider: NuGet
+    api_key:
+      secure: Ab4T/48EyIJhVrqkfKdUxmHUtseEVuXuyrGACxZ0KN35rb/BzABlBM2YjZojicvT
+    artifact: 'NuGetPackages'
+    on:
+      APPVEYOR_REPO_TAG: true
 

tests/CommandLine.Tests/Fakes/HelpTextWithLineBreaks_Options.cs

@@ -10,7 +10,7 @@ It has multiple lines.
 
 
         [Option(HelpText = @"This is a help text description where we want
-   The left pad after a linebreak to be honoured so that
+   the left pad after a linebreak to be honoured so that
    we can sub-indent within a description.")]
         public string StringValu2 { get; set; }
 

tests/CommandLine.Tests/Unit/UnParserExtensionsTests.cs

@@ -207,8 +207,8 @@ public static void UnParsing_instance_with_int_nullable(bool skipDefault, int? v
 
         }
         [Theory]
-        [InlineData(Shapes.Circle, "--shape circle")]
-        [InlineData(Shapes.Square, "--shape square")]
+        [InlineData(Shapes.Circle, "--shape Circle")]
+        [InlineData(Shapes.Square, "--shape Square")]
         [InlineData(null, "")]
         public static void UnParsing_instance_with_nullable_enum(Shapes? shape, string expected)
         {