Cleaned up code

src/Compilers/CSharp/Test/CommandLine/CommandLineTestBase.cs

@@ -46,6 +46,12 @@ protected static string GetSdkDirectory(TempRoot temp)
             return RuntimeEnvironment.GetRuntimeDirectory();
         }
 
+        internal CSharpCommandLineArguments DefaultParse(IEnumerable<string> args, string baseDirectory, string sdkDirectory = null, string additionalReferenceDirectories = null)
+        {
+            sdkDirectory = sdkDirectory ?? SdkDirectory;
+            return CSharpCommandLineParser.Default.Parse(args, baseDirectory, sdkDirectory, additionalReferenceDirectories);
+        }
+
         internal MockCSharpCompiler CreateCSharpCompiler(string[] args, ImmutableArray<DiagnosticAnalyzer> analyzers = default, AnalyzerAssemblyLoader loader = null)
         {
             return CreateCSharpCompiler(null, WorkingDirectory, args, analyzers, loader);

src/Compilers/CSharp/Test/CommandLine/CommandLineTests.cs

@@ -83,12 +83,6 @@ internal override TextReader CreateTextFileReader(string fullPath)
             }
         }
 
-        private CSharpCommandLineArguments DefaultParse(IEnumerable<string> args, string baseDirectory, string sdkDirectory = null, string additionalReferenceDirectories = null)
-        {
-            sdkDirectory = sdkDirectory ?? SdkDirectory;
-            return CSharpCommandLineParser.Default.Parse(args, baseDirectory, sdkDirectory, additionalReferenceDirectories);
-        }
-
         private CSharpCommandLineArguments ScriptParse(IEnumerable<string> args, string baseDirectory)
         {
             return CSharpCommandLineParser.Script.Parse(args, baseDirectory, SdkDirectory);
@@ -9848,18 +9842,12 @@ public void StrongNameProviderWithCustomTempPath()
             }
         }
 
-        public class QuotedArgumentTests : CSharpTestBase
+        public class QuotedArgumentTests : CommandLineTestBase
         {
             private static readonly string s_rootPath = ExecutionConditionUtil.IsWindows
                 ? @"c:\"
                 : "/";
 
-            private CSharpCommandLineArguments DefaultParse(IEnumerable<string> args, string baseDirectory, string sdkDirectory = null, string additionalReferenceDirectories = null)
-            {
-                sdkDirectory = sdkDirectory ?? GetSdkDirectory(Temp);
-                return CSharpCommandLineParser.Default.Parse(args, baseDirectory, sdkDirectory, additionalReferenceDirectories);
-            }
-
             private void VerifyQuotedValid<T>(string name, string value, T expected, Func<CSharpCommandLineArguments, T> getValue)
             {
                 var args = DefaultParse(new[] { $"/{name}:{value}", "a.cs" }, s_rootPath);

src/Compilers/CSharp/Test/CommandLine/Microsoft.CodeAnalysis.CSharp.CommandLine.UnitTests.csproj

@@ -6,7 +6,7 @@
     <PlatformTarget>AnyCPU</PlatformTarget>
     <OutputType>Library</OutputType>
     <RootNamespace>Microsoft.CodeAnalysis.CSharp.CommandLine.UnitTests</RootNamespace>
-    <TargetFrameworks>netcoreapp2.1;net46</TargetFrameworks>
+    <TargetFrameworks>$(RoslynPortableTargetFrameworks)</TargetFrameworks>
     <RoslynProjectType>UnitTestPortable</RoslynProjectType>
     <GenerateMicrosoftCodeAnalysisCommitHashAttribute>true</GenerateMicrosoftCodeAnalysisCommitHashAttribute>
   </PropertyGroup>