Merge pull request #5534 from dotty-staging/add-regression-test-for-decompile-form-file

Add regression test for `dotc -decompile xyz.tasty`

Author: nicolasstucki

project/scripts/cmdTests

@@ -18,6 +18,10 @@ echo "testing sbt dotc -decompile"
 "$SBT" ";dotc -decompile -color:never -classpath $OUT $MAIN" > "$tmp"
 grep -qe "def main(args: scala.Array\[scala.Predef.String\]): scala.Unit =" "$tmp"
 
+echo "testing sbt dotc -decompile from file"
+"$SBT" ";dotc -decompile -color:never -classpath $OUT $OUT/$TASTY" > "$tmp"
+grep -qe "def main(args: scala.Array\[scala.Predef.String\]): scala.Unit =" "$tmp"
+
 echo "testing sbt dotr with no -classpath"
 clear_out "$OUT"
 "$SBT" ";dotc $SOURCE ; dotr $MAIN" > "$tmp"

project/scripts/cmdTestsCommon.inc.sh

@@ -5,6 +5,7 @@ SBT="./project/scripts/sbt" # if run on CI
 
 SOURCE="tests/pos/HelloWorld.scala"
 MAIN="HelloWorld"
+TASTY="HelloWorld.tasty"
 EXPECTED_OUTPUT="hello world"
 
 OUT=$(mktemp -d)