partest: run tests with -Xms64M -Xmx1024M instead of JVM defaults

This is the same settings that scalac uses, this should help use avoid
using too much memory (the default on 64 bits Linux seems to be
-Xms248M -Xmx3938M).

Author: smarter

test/dotty/partest/DPConfig.scala

@@ -4,6 +4,8 @@ import scala.collection.JavaConversions._
 import scala.reflect.io.Path
 import java.io.File
 
+import scala.tools.partest.PartestDefaults
+
 
 /** Dotty Partest runs all tests in the provided testDirs located under
   * testRoot. There can be several directories with pos resp. neg tests, as
@@ -15,6 +17,12 @@ import java.io.File
   * otherwise pos/__defaultFlags.flags are used if the file exists).
   */
 object DPConfig {
+  /** Options used for _running_ the run tests.
+   *  Note that this is different from the options used when _compiling_ tests,
+   *  those are determined by the sbt configuration.
+   */
+  val runJVMOpts = s"-Xms64M -Xmx1024M ${PartestDefaults.javaOpts}"
+
   val testRoot = (Path(".") / Path("tests") / Path("partest-generated")).toString
   val genLog = Path(testRoot) / Path("gen.log")
 

test/dotty/partest/DPConsoleRunner.scala

@@ -65,8 +65,9 @@ class DPSuiteRunner(testSourcePath: String, // relative path, like "files", or "
   consoleArgs: String,
   javaCmdPath: String = PartestDefaults.javaCmd,
   javacCmdPath: String = PartestDefaults.javacCmd,
-  scalacExtraArgs: Seq[String] = Seq.empty)
-extends SuiteRunner(testSourcePath, fileManager, updateCheck, failed, javaCmdPath, javacCmdPath, scalacExtraArgs) {
+  scalacExtraArgs: Seq[String] = Seq.empty,
+  javaOpts: String = DPConfig.runJVMOpts)
+extends SuiteRunner(testSourcePath, fileManager, updateCheck, failed, javaCmdPath, javacCmdPath, scalacExtraArgs, javaOpts) {
 
   if (!DPConfig.runTestsInParallel)
     sys.props("partest.threads") = "1"