Add testcases for nested DRIs

Author: romanowski

scala3doc-testcases/src/tests/nestingDRI.scala

@@ -0,0 +1,16 @@
+package tests.nestingDRI
+
+trait TestClass
+
+class A:
+  class B
+  object B:
+    object C
+    class C:
+      object D
+
+
+class AA:
+  object B:
+    class C:
+      object D

scala3doc-testcases/src/toplevel.scala

@@ -0,0 +1,3 @@
+def toplevelDef = 123
+
+class ToplevelClass

scala3doc/test/dotty/dokka/linking/DriTestCases.scala

@@ -1,5 +1,6 @@
 package dotty.dokka
 package linking
+import org.junit.Assert.assertTrue
 
 import org.junit.Ignore
 
@@ -11,6 +12,13 @@ class GenericTest extends DriTest("genericDRI")
 
 class FunctionTest extends DriTest("functionDRI")
 
+class NestingTest extends DriTest("nestingDRI"):
+  override def assertOnDRIs(dris: Seq[DRI]) =
+    println(dris.groupBy(_.location).map(_._1))
+    dris.groupBy(_.location).foreach{ case (location, dris) =>
+      assertTrue(s"Location $location has multiple dris assigned: $dris", dris.size == 1)
+    }
+
 @Ignore class ShadowingTest extends DriTest("shadowingDRI"):
   override def assertOnDRIs(dris: Seq[DRI]) =
     if (!dris.flatMap(d => Option(d.getExtra)).exists(_.contains("findThisDeclaration"))) then