cleanup: drop TestDomainSimple

formats-tests/src/test/scala/flatgraph/TestGraphSimple.scala

@@ -0,0 +1,26 @@
+package flatgraph
+
+import flatgraph.testdomains.generic.GenericDomain
+import flatgraph.testdomains.generic.edges.ConnectedTo
+import flatgraph.testdomains.generic.nodes.NewNodeA
+
+import java.nio.file.Path
+
+object TestGraphSimple {
+  def create(storageMaybe: Option[Path] = None): GenericDomain = {
+    val genericDomain = storageMaybe match {
+      case None              => GenericDomain.empty
+      case Some(storagePath) => GenericDomain.withStorage(storagePath)
+    }
+    val graph = genericDomain.graph
+    val node1 = NewNodeA().stringMandatory("node 1 a").stringOptional("node 1 b").stringList(Seq("node 1 c1", "node 1 c2"))
+    val node2 = NewNodeA().intMandatory(1).intOptional(2).intList(Seq(10, 11, 12))
+
+    DiffGraphApplier.applyDiff(
+      graph,
+      GenericDomain.newDiffGraphBuilder
+        .addEdge(node1, node2, ConnectedTo.Label, "edge property")
+    )
+    genericDomain
+  }
+}

formats-tests/src/test/scala/flatgraph/formats/graphson/GraphSONTests.scala

@@ -2,10 +2,8 @@ package flatgraph.formats.graphson
 
 import better.files.File
 import flatgraph.{DiffGraphApplier, GenericDNode, TestGraphSimple}
-import flatgraph.TestDomainSimple.*
 import flatgraph.testdomains.generic.Language.*
 import flatgraph.testdomains.generic.nodes.NodeA
-import flatgraph.TestDomainSimple.PropertyNames.{ContainedTestNodeProperty, IntProperty}
 import flatgraph.misc.TestUtils.applyDiff
 import flatgraph.testdomains.generic.GenericDomain
 import flatgraph.testdomains.generic.nodes.NewNodeB