Fix sourcepath testing

We were not testing some files previously, and one of the file did not
actually typecheck.

Author: smarter

compiler/test/dotty/tools/dotc/CompilationTests.scala

@@ -39,9 +39,7 @@ class CompilationTests extends ParallelTesting {
       compileFile("tests/pos-scala2/rewrites.scala", scala2CompatMode.and("-rewrite")).copyToTarget(),
       compileFile("tests/pos-special/utf8encoded.scala", explicitUTF8),
       compileFile("tests/pos-special/utf16encoded.scala", explicitUTF16),
-      compileFile("tests/pos-special/sourcepath/outer/Test.scala", defaultOptions.and("-sourcepath", "tests/pos-special/sourcepath")),
-      compileFile("tests/pos-special/sourcepath/outer/Test2.scala", defaultOptions.and("-sourcepath", "tests/pos-special/sourcepath")),
-      compileFile("tests/pos-special/sourcepath/outer/Test3.scala", defaultOptions.and("-sourcepath", "tests/pos-special/sourcepath")),
+      compileFilesInDir("tests/pos-special/sourcepath/outer", defaultOptions.and("-sourcepath", "tests/pos-special/sourcepath")),
       compileFile("tests/pos-special/sourcepath/outer/nested/Test4.scala", defaultOptions.and("-sourcepath", "tests/pos-special/sourcepath")),
       compileFilesInDir("tests/pos-special/fatal-warnings", defaultOptions.and("-Xfatal-warnings", "-feature")),
       compileFilesInDir("tests/pos-special/spec-t5545", defaultOptions),

tests/pos-special/sourcepath/outer/nested/BC.scala

@@ -1,6 +1,6 @@
 package outer.nested
 
 
-case class B(x: Int) extends A(x)
+case class B(override val x: Int) extends A(x)
 
 case class C(s: String) extends A(s.length)