More Roundtrip tests

pkg/readers/dctx/reader_test.go

@@ -445,3 +445,51 @@ func TestColumnProperties(t *testing.T) {
 		t.Log("Note: No columns with default values found (this may be valid for the test data)")
 	}
 }
+
+func TestRelationships(t *testing.T) {
+	opts := &readers.ReaderOptions{
+		FilePath: filepath.Join("..", "..", "..", "examples", "dctx", "example.dctx"),
+	}
+
+	reader := NewReader(opts)
+	db, err := reader.ReadDatabase()
+	if err != nil {
+		t.Fatalf("ReadDatabase() error = %v", err)
+	}
+
+	// Count total relationships across all tables
+	relationshipCount := 0
+	for _, schema := range db.Schemas {
+		for _, table := range schema.Tables {
+			relationshipCount += len(table.Relationships)
+		}
+	}
+
+	// The example.dctx file should have a significant number of relationships
+	// With the fix for nested field GUID mapping, we expect around 100+ relationships
+	if relationshipCount < 50 {
+		t.Errorf("Expected at least 50 relationships, got %d. This may indicate relationships are not being parsed correctly", relationshipCount)
+	}
+
+	t.Logf("Successfully parsed %d relationships", relationshipCount)
+
+	// Verify relationship properties
+	for _, schema := range db.Schemas {
+		for _, table := range schema.Tables {
+			for _, rel := range table.Relationships {
+				if rel.Name == "" {
+					t.Errorf("Relationship in table '%s' should have a name", table.Name)
+				}
+				if rel.FromTable == "" {
+					t.Errorf("Relationship '%s' should have a from table", rel.Name)
+				}
+				if rel.ToTable == "" {
+					t.Errorf("Relationship '%s' should have a to table", rel.Name)
+				}
+				if rel.ForeignKey == "" {
+					t.Errorf("Relationship '%s' should reference a foreign key", rel.Name)
+				}
+			}
+		}
+	}
+}