Added an analyzer which keeps line breaks LF on every system (#1193)

app/Tests/Tests.csproj

@@ -37,15 +37,24 @@
         <ProjectReference Include="..\MindWork AI Studio\MindWork AI Studio.csproj" />
 
         <!--
-            Referenced as plain libraries, not as analyzers: the tests run the generator and the
-            analyzer themselves, against a snippet they compile in memory. Building them into this
-            project as analyzers would have them judge the test code instead, which is not what is
-            being checked here.
+            Referenced as libraries: the tests run the generator and the analyzers themselves, against
+            a snippet they compile in memory. SourceCodeRules is an analyzer of this project as well,
+            but only for MWAIS0018, see below: a test which expects the line break of the system fails
+            on Windows only, where no pipeline runs the tests. The other rules are written for the code
+            of the app and would judge test code which has its reasons, such as new Random() with a seed.
         -->
-        <ProjectReference Include="..\SourceCodeRules\SourceCodeRules\SourceCodeRules.csproj" />
+        <ProjectReference Include="..\SourceCodeRules\SourceCodeRules\SourceCodeRules.csproj" OutputItemType="Analyzer" />
         <ProjectReference Include="..\SourceGeneratedMappings\SourceGeneratedMappings.csproj" />
     </ItemGroup>
 
+    <!--
+        Every rule of SourceCodeRules except MWAIS0018, the line break of the system. A new rule judges
+        the tests, too, until it is listed here.
+    -->
+    <PropertyGroup>
+        <NoWarn>$(NoWarn);MWAIS0001;MWAIS0002;MWAIS0003;MWAIS0004;MWAIS0005;MWAIS0006;MWAIS0007;MWAIS0008;MWAIS0009;MWAIS0010;MWAIS0011;MWAIS0012;MWAIS0013;MWAIS0014;MWAIS0015;MWAIS0016;MWAIS0017</NoWarn>
+    </PropertyGroup>
+
     <!--
         Compiled here as well, so that the tests check the same options of the app which the trim smoke test finds.
     -->