Fix scheme wrapping

dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Scheme.kt

@@ -11,7 +11,7 @@ import hep.dataforge.names.asName
  */
 public open class Scheme() : MutableItemProvider, Described, MetaRepr {
 
-    private var items: MutableItemProvider = MetaBuilder()
+    private var items: MutableItemProvider = Config()
 
     private var default: ItemProvider? = null
 
@@ -23,7 +23,7 @@ public open class Scheme() : MutableItemProvider, Described, MetaRepr {
         descriptor: NodeDescriptor? = null,
     ) {
         //use properties in the init block as default
-        this.default = items.withDefault(default)
+        this.default = this.items.withDefault(default)
         //reset values, defaults are already saved
         this.items = items
         this.descriptor = descriptor

dataforge-meta/src/commonTest/kotlin/hep/dataforge/meta/SchemeTest.kt

@@ -0,0 +1,23 @@
+package hep.dataforge.meta
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class SchemeTest {
+    @Test
+    fun testSchemeWrappingBeforeEdit(){
+        val config = Config()
+        val scheme = TestScheme.wrap(config)
+        scheme.a = 29
+        assertEquals(29, config["a"].int)
+    }
+
+    @Test
+    fun testSchemeWrappingAfterEdit(){
+        val scheme = TestScheme.empty()
+        scheme.a = 29
+        val config = Config()
+        scheme.retarget(config)
+        assertEquals(29, scheme.a)
+    }
+}

dataforge-meta/src/commonTest/kotlin/hep/dataforge/meta/SpecificationTest.kt

@@ -3,8 +3,7 @@ package hep.dataforge.meta
 import kotlin.test.Test
 import kotlin.test.assertEquals
 
-class SpecificationTest {
-    class TestScheme : Scheme() {
+internal class TestScheme : Scheme() {
     var list by numberList(1, 2, 3)
 
     var a by int()
@@ -20,7 +19,9 @@ class SpecificationTest {
             wrap(target, defaultProvider)
 
     }
-    }
+}
+
+class SpecificationTest {
 
 //    @Test
 //    fun testMetaScheme(){
@@ -70,7 +71,7 @@ class SpecificationTest {
     fun testChildUpdate() {
         val config = Config()
         val child = config.getChild("child")
-        val scheme = child.update(TestScheme) {
+        child.update(TestScheme) {
             a = 22
             b = "test"
         }

dataforge-meta/src/jsTest/kotlin/hep/dataforge/meta/DynamicMetaTest.kt

@@ -38,17 +38,11 @@ class DynamicMetaTest {
         }
 
         val dynamic = meta.toDynamic()
-
         assertEquals(2,dynamic.array[1])
-
         assertEquals(22, dynamic.a)
-
         val keys = js("Object.keys(dynamic)") as Array<String>
-
         assertTrue { keys.contains("ob") }
-
         assertEquals(18, dynamic.ob.childNode)
-
         assertEquals<Meta>(meta, DynamicMeta(dynamic))
     }