Fix ScalafixImplSuite test and add a test for configuration path

scalafix-tests/unit/src/test/scala-2.12/scalafix/tests/cli/ScalafixImplSuite.scala → scalafix-tests/unit/src/test/scala/scalafix/tests/cli/ScalafixImplSuite.scala

@@ -12,6 +12,7 @@ import java.util.Optional
 import coursier._
 import org.scalatest.funsuite.AnyFunSuite
 import scala.collection.JavaConverters._
+import buildinfo.RulesBuildInfo
 import scala.meta.io.AbsolutePath
 import scala.meta.io.Classpath
 import scalafix.Versions
@@ -23,6 +24,7 @@ import scalafix.internal.reflect.ClasspathOps
 import scalafix.internal.reflect.RuleCompiler
 import scalafix.test.StringFS
 import scalafix.testkit.DiffAssertions
+import scalafix.tests.util.ScalaVersions
 import scalafix.{interfaces => i}
 import scala.util.Properties
 
@@ -97,6 +99,47 @@ class ScalafixImplSuite extends AnyFunSuite with DiffAssertions {
     assert(e.isPresent)
     assert(e.get().getMessage.contains("-Ywarn-unused"))
   }
+  test("configure scalafix path") {
+    val api = i.Scalafix.classloadInstance(this.getClass.getClassLoader)
+
+    val charset = StandardCharsets.US_ASCII
+    val cwd = StringFS
+      .string2dir(
+        """|/src/Semicolon.scala
+           |
+           |object Semicolon {
+           |  def main { println(42) }
+           |}
+           |/.scalafix.conf
+           |rules = ["DisableSyntax"]
+      """.stripMargin,
+        charset
+      )
+    val args = api
+      .newArguments()
+      .withConfig(Optional.empty())
+      .withWorkingDirectory(cwd.toNIO)
+    args.validate()
+    assert(
+      args.rulesThatWillRun().asScala.toList.map(_.toString) == List(
+        "ScalafixRule(DisableSyntax)"
+      )
+    )
+
+    //if a non empty list of rules is provided, rules from config file are not read.
+    val args2 = api
+      .newArguments()
+      .withRules(List("ProcedureSyntax").asJava)
+      .withConfig(Optional.empty())
+      .withWorkingDirectory(cwd.toNIO)
+    args2.validate()
+    assert(
+      args2.rulesThatWillRun().asScala.toList.map(_.toString) == List(
+        "ScalafixRule(ProcedureSyntax)"
+      )
+    )
+
+  }
 
   test("runMain") {
     // This is a full integration test that stresses the full breadth of the scalafix-interfaces API
@@ -126,9 +169,19 @@ class ScalafixImplSuite extends AnyFunSuite with DiffAssertions {
     Files.createDirectories(d)
     val semicolon = src.resolve("Semicolon.scala")
     val excluded = src.resolve("Excluded.scala")
+    val scalaBinaryVersion =
+      RulesBuildInfo.scalaVersion.split('.').take(2).mkString(".")
     // This rule is published to Maven Central to simplify testing --tool-classpath.
+    val dep =
+      Dependency(
+        Module(
+          Organization("ch.epfl.scala"),
+          ModuleName(s"example-scalafix-rule_$scalaBinaryVersion")
+        ),
+        "1.6.0"
+      )
     val toolClasspathJars = Fetch()
-      .addDependencies(dep"com.geirsson:example-scalafix-rule_2.12:1.1.0")
+      .addDependencies(dep)
       .run()
       .toList
     val toolClasspath = ClasspathOps.toClassLoader(
@@ -147,7 +200,6 @@ class ScalafixImplSuite extends AnyFunSuite with DiffAssertions {
       excluded.toString
     )
     val compileSucceeded = scala.tools.nsc.Main.process(scalacOptions)
-    assert(compileSucceeded)
     val buf = List.newBuilder[ScalafixDiagnostic]
     val callback = new ScalafixMainCallback {
       override def reportDiagnostic(diagnostic: ScalafixDiagnostic): Unit = {
@@ -156,6 +208,10 @@ class ScalafixImplSuite extends AnyFunSuite with DiffAssertions {
     }
     val out = new ByteArrayOutputStream()
     val relativePath = cwd.relativize(semicolon)
+    val warnRemoveUnused =
+      if (ScalaVersions.isScala213)
+        "-Wunused:imports"
+      else "-Ywarn-unused-import"
     val args = api
       .newArguments()
       .withParsedArguments(
@@ -183,7 +239,7 @@ class ScalafixImplSuite extends AnyFunSuite with DiffAssertions {
       .withPrintStream(new PrintStream(out))
       .withMode(ScalafixMainMode.CHECK)
       .withToolClasspath(toolClasspath)
-      .withScalacOptions(Collections.singletonList("-Ywarn-unused-import"))
+      .withScalacOptions(Collections.singletonList(warnRemoveUnused))
       .withScalaVersion(Properties.versionNumberString)
       .withConfig(Optional.empty())
     val expectedRulesToRun = List(
@@ -243,5 +299,4 @@ class ScalafixImplSuite extends AnyFunSuite with DiffAssertions {
          |""".stripMargin
     )
   }
-
 }