fix assertions in tests, fix compile error

Author: bishabosha

Diff for: compiler/test/dotty/tools/DottyTest.scala

@@ -44,7 +44,7 @@ trait DottyTest extends ContextEscapeDetection {
     fc.setProperty(ContextDoc, new ContextDocstrings)
   }
 
-  protected def defaultCompiler: Compiler = Compiler()
+  protected def defaultCompiler: Compiler = new Compiler()
 
   private def compilerWithChecker(phase: String)(assertion: (tpd.Tree, Context) => Unit) = new Compiler {
 

Diff for: compiler/test/dotty/tools/dotc/sbt/ProgressCallbackTest.scala

@@ -145,10 +145,10 @@ object ProgressCallbackTest:
   case class ProgressEvent(curr: Int, total: Int, currPhase: String, nextPhase: String)
   case class PhaseTransition(curr: String, next: String)
 
-  def asSubphases(phase: Phase): IArray[String] =
-    val subPhases = Run.SubPhases(phase).all
-    if subPhases.isEmpty then IArray(phase.phaseName)
-    else subPhases
+  def asSubphases(phase: Phase): IndexedSeq[String] =
+    val subPhases = Run.SubPhases(phase)
+    val indices = 0 until phase.traversals
+    indices.map(subPhases.subPhase)
 
   def runnablePhases()(using Context): IArray[Phase] =
     IArray.from(ctx.base.allPhases.filter(_.isRunnable))

Diff for: sbt-bridge/test/xsbt/CompileProgressSpecification.scala

@@ -54,7 +54,6 @@ class CompileProgressSpecification {
         "parser",
         "typer (indexing)", "typer (typechecking)", "typer (checking java)",
         "sbt-deps",
-        "extractSemanticDB",
         "posttyper",
         "sbt-api",
         "SetRootTree",