Add tests for steps.annotation.toString

src/test/scala/steps/annotation/toString.scala

@@ -0,0 +1,31 @@
+package steps.annotation
+
+import scala.annotation.experimental
+import scala.language.experimental.clauseInterleaving
+
+@toString
+@experimental
+class Foo1(val a: Int, val b: String)
+
+@toString
+@experimental
+class Foo2(a: Int, b: String)
+
+@toString
+@experimental
+class Foo3(var a: Int, var b: String)
+
+@toString
+@experimental
+class Foo4(a: Int, b: String)(c: Int)
+
+@experimental
+class AssertToStringBehaviour extends munit.FunSuite:
+
+  test("@toString works with all kinds of classes"):
+    assertEquals(Foo1(1, "hello").toString(), "Foo1(1, hello)")
+    assertEquals(Foo2(1, "hello").toString(), "Foo2(1, hello)")
+    assertEquals(Foo3(1, "hello").toString(), "Foo3(1, hello)")
+    assertEquals(Foo4(1, "hello")(2).toString(), "Foo4(1, hello, 2)")
+
+end AssertToStringBehaviour