refactor: clean up array subset sync test

- Rename TestSync_ArraySubset_Debug to TestSync_ArraySubset_Success
- Remove debug logging statements
- Simplify comments to be more concise and professional
- Remove unused TestSimpleArrayModel and TestSimpleArrayHighModel
- Update model comments to be clearer and less verbose

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: subomi

marshaller/syncing_test.go

@@ -1144,11 +1144,10 @@ func TestSync_EmbeddedMapComparison_PointerVsValue_Success(t *testing.T) {
 	})
 }
 
-func TestSync_ArraySubset_Debug(t *testing.T) {
+func TestSync_ArraySubset_Success(t *testing.T) {
 	t.Parallel()
 
-	// Create items for the high-level model (3 items - subset)
-	// Source: items one, four, and six
+	// Create high-level model with 3 items
 	itemOne := &tests.TestItemHighModel{
 		Name:        "one",
 		Description: "First item",
@@ -1166,9 +1165,7 @@ func TestSync_ArraySubset_Debug(t *testing.T) {
 		Items: []*tests.TestItemHighModel{itemOne, itemFour, itemSix},
 	}
 
-	// Set the root node for the high-level model by creating a YAML node
-	// This simulates the case where we have an existing YAML document with 6 items
-	// Target: items three, five, one, four, second, and six (in this order)
+	// Populate core model with 6 items from YAML
 	initialYAML := `items:
     - name: three
       description: Third item
@@ -1187,18 +1184,13 @@ func TestSync_ArraySubset_Debug(t *testing.T) {
 	err := yaml.Unmarshal([]byte(initialYAML), &rootNode)
 	require.NoError(t, err)
 
-	// Get the core model
 	coreModel := highModel.GetCore()
+	coreModel.SetRootNode(rootNode.Content[0])
 
-	// Set the root node on the core model (accessed through GetCore())
-	coreModel.SetRootNode(rootNode.Content[0]) // Content[0] is the actual root mapping node
-
-	// Unmarshal the YAML into the core model to populate it with the 6 items
 	_, err = marshaller.UnmarshalModel(t.Context(), rootNode.Content[0], coreModel)
 	require.NoError(t, err)
 
-	// Use SetCore to link each high-level item to its corresponding core item
-	// This establishes the connection between high-level items and their core counterparts
+	// Link high-level items to their corresponding core items
 	for _, item := range coreModel.Items.Value {
 		switch item.Name.Value {
 		case "one":
@@ -1210,21 +1202,14 @@ func TestSync_ArraySubset_Debug(t *testing.T) {
 		}
 	}
 
-	// Sync the high model (3 items) to the core model (currently 6 items)
-	// This tests what happens when syncing a subset
+	// Sync high model subset to core model
 	resultNode, err := marshaller.SyncValue(t.Context(), &highModel, highModel.GetCore(), highModel.GetRootNode(), false)
 	require.NoError(t, err)
 	require.NotNil(t, resultNode)
 
-	// Verify the synced array - should now match the high model's subset (3 items)
-	// After sync, items two, three, five, and second should be removed
+	// Verify synced array matches high model subset
 	items := coreModel.Items.Value
-	require.Len(t, items, 3, "After sync, core model should have 3 items matching high model")
-
-	// Debug: Print what we actually got
-	t.Logf("Item 0: %s - %s", items[0].Name.Value, items[0].Description.Value)
-	t.Logf("Item 1: %s - %s", items[1].Name.Value, items[1].Description.Value)
-	t.Logf("Item 2: %s - %s", items[2].Name.Value, items[2].Description.Value)
+	require.Len(t, items, 3)
 
 	require.Equal(t, "one", items[0].Name.Value)
 	require.Equal(t, "First item", items[0].Description.Value)
@@ -1235,7 +1220,7 @@ func TestSync_ArraySubset_Debug(t *testing.T) {
 	require.Equal(t, "six", items[2].Name.Value)
 	require.Equal(t, "Sixth item", items[2].Description.Value)
 
-	// Verify the core model's RootNode contains the correct YAML
+	// Verify YAML output
 	expectedYAML := `items:
     - name: one
       description: First item

marshaller/tests/core/models.go

@@ -184,22 +184,15 @@ type TestTypeConversionCoreModel struct {
 	Extensions      core.Extensions          `key:"extensions"`
 }
 
-// TestSimpleArrayModel is a minimal model with only an array field for testing array sync behavior
-type TestSimpleArrayModel struct {
-	marshaller.CoreModel `model:"testSimpleArrayModel"`
-
-	ArrayField marshaller.Node[[]string] `key:"arrayField"`
-}
-
-// TestItemModel represents a simple item with name and description
+// TestItemModel represents an item with a name and description
 type TestItemModel struct {
 	marshaller.CoreModel `model:"testItemModel"`
 
 	Name        marshaller.Node[string] `key:"name"`
 	Description marshaller.Node[string] `key:"description"`
 }
 
-// TestArrayOfObjectsModel is a minimal model with an array of objects for testing array sync behavior
+// TestArrayOfObjectsModel contains an array of items
 type TestArrayOfObjectsModel struct {
 	marshaller.CoreModel `model:"testArrayOfObjectsModel"`
 

marshaller/tests/models.go

@@ -129,20 +129,14 @@ type TestEmbeddedMapWithFieldsPointerHighModel struct {
 	Extensions *extensions.Extensions
 }
 
-// TestSimpleArrayHighModel is a minimal high-level model with only an array field for testing array sync behavior
-type TestSimpleArrayHighModel struct {
-	marshaller.Model[core.TestSimpleArrayModel]
-	ArrayField []string
-}
-
-// TestItemHighModel represents a simple item with name and description
+// TestItemHighModel represents an item with a name and description
 type TestItemHighModel struct {
 	marshaller.Model[core.TestItemModel]
 	Name        string
 	Description string
 }
 
-// TestArrayOfObjectsHighModel is a minimal high-level model with an array of objects for testing array sync behavior
+// TestArrayOfObjectsHighModel contains an array of items
 type TestArrayOfObjectsHighModel struct {
 	marshaller.Model[core.TestArrayOfObjectsModel]
 	Items []*TestItemHighModel