add the example for issue #26

Author: tribbloid

examples/gradle-example/src/test/scala/co/helmethair/scalatest/example/NestedTestGroup.scala

@@ -0,0 +1,29 @@
+package co.helmethair.scalatest.example
+
+import org.scalatest.Suite
+import org.scalatest.funspec.AnyFunSpec
+
+class NestedTestGroup extends AnyFunSpec {
+
+  import NestedTestGroup.*
+
+  override def nestedSuites: IndexedSeq[Suite] = IndexedSeq(
+    N1,
+    N2
+  )
+
+  it("c") {}
+}
+
+object NestedTestGroup {
+
+  class NestedSubTest extends AnyFunSpec {
+
+    it("a") {}
+    it("b") {}
+  }
+
+  object N1 extends NestedSubTest
+  object N2 extends NestedSubTest
+
+}