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-rw-r--r--test/junit/scala/tools/nsc/backend/jvm/DefaultMethodTest.scala43
1 files changed, 43 insertions, 0 deletions
diff --git a/test/junit/scala/tools/nsc/backend/jvm/DefaultMethodTest.scala b/test/junit/scala/tools/nsc/backend/jvm/DefaultMethodTest.scala
new file mode 100644
index 0000000000..2ce9d21331
--- /dev/null
+++ b/test/junit/scala/tools/nsc/backend/jvm/DefaultMethodTest.scala
@@ -0,0 +1,43 @@
+package scala.tools.nsc.backend.jvm
+
+import org.junit.Assert._
+import org.junit.Test
+
+import scala.collection.JavaConverters
+import scala.tools.asm.Opcodes
+import scala.tools.asm.tree.ClassNode
+import scala.tools.nsc.backend.jvm.CodeGenTools._
+import JavaConverters._
+import scala.tools.testing.ClearAfterClass
+
+object DefaultMethodTest extends ClearAfterClass.Clearable {
+ var compiler = newCompiler()
+ def clear(): Unit = { compiler = null }
+}
+
+class DefaultMethodTest extends ClearAfterClass {
+ ClearAfterClass.stateToClear = DefaultMethodTest
+ val compiler = DefaultMethodTest.compiler
+
+ @Test
+ def defaultMethodsViaGenBCode(): Unit = {
+ import compiler._
+ val code = "package pack { trait T { def foo: Int }}"
+ object makeFooDefaultMethod extends Transformer {
+ val Foo = TermName("foo")
+ /** Transforms a single tree. */
+ override def transform(tree: compiler.Tree): compiler.Tree = tree match {
+ case dd @ DefDef(_, Foo, _, _, _, _) =>
+ dd.symbol.setFlag(reflect.internal.Flags.JAVA_DEFAULTMETHOD)
+ copyDefDef(dd)(rhs = Literal(Constant(1)).setType(definitions.IntTpe))
+ case _ => super.transform(tree)
+ }
+ }
+ val asmClasses: List[ClassNode] = readAsmClasses(compileTransformed(compiler)(code, Nil, makeFooDefaultMethod.transform(_)))
+ val foo = asmClasses.head.methods.iterator.asScala.toList.last
+ assertTrue("default method should not be abstract", (foo.access & Opcodes.ACC_ABSTRACT) == 0)
+ assertTrue("default method body emitted", foo.instructions.size() > 0)
+ }
+
+
+}