ECL, default scale, and preferred alignment entries

internal/project/project_test.go

@@ -162,6 +162,35 @@ topdata:
 	}
 }
 
+func TestEffectiveConfigIncludesTopDataValueDefaults(t *testing.T) {
+	root := t.TempDir()
+	writeProjectFile(t, filepath.Join(root, ConfigFile), `
+module:
+  name: Test Module
+  resref: testmod
+topdata:
+  source: topdata
+  value_defaults:
+    - dataset: racialtypes/core
+      column: ECL
+      value: 0
+`)
+
+	proj, err := Load(root)
+	if err != nil {
+		t.Fatalf("Load returned error: %v", err)
+	}
+
+	defaults := proj.EffectiveConfig().TopData.ValueDefaults
+	if len(defaults) != 1 {
+		t.Fatalf("expected one topdata value default, got %#v", defaults)
+	}
+	got := defaults[0]
+	if got.Dataset != "racialtypes/core" || got.Column != "ECL" || got.Value != 0 {
+		t.Fatalf("unexpected topdata value default: %#v", got)
+	}
+}
+
 func TestValidateLayoutRejectsInvalidTopDataValueEncodings(t *testing.T) {
 	root := t.TempDir()
 	mkdirAll(t, filepath.Join(root, "topdata"))
@@ -179,6 +208,11 @@ func TestValidateLayoutRejectsInvalidTopDataValueEncodings(t *testing.T) {
 					{Dataset: "racialtypes/core", Column: "AvailableSkinColors", Mode: "packed_hex_list", Min: 0, Max: 175, HexWidth: 2},
 					{Dataset: "", Column: "AvailableHeadsMale", Mode: "unknown", Min: -1, Max: 999, HexWidth: 0},
 				},
+				ValueDefaults: []TopDataValueDefaultConfig{
+					{Dataset: "racialtypes/core", Column: "ECL", Value: 0},
+					{Dataset: "racialtypes/core", Column: "ECL", Value: 1},
+					{Dataset: "", Column: "", Value: 0},
+				},
 			},
 		},
 	}
@@ -195,6 +229,9 @@ func TestValidateLayoutRejectsInvalidTopDataValueEncodings(t *testing.T) {
 		"topdata.value_encodings[2].mode \"unknown\" is not supported",
 		"topdata.value_encodings[2].min must be zero or greater",
 		"topdata.value_encodings[2].hex_width must be greater than zero",
+		"topdata.value_defaults[1] duplicates an earlier dataset/column default",
+		"topdata.value_defaults[2].dataset is required",
+		"topdata.value_defaults[2].column is required",
 	} {
 		if !strings.Contains(text, want) {
 			t.Fatalf("expected validation error %q, got %v", want, err)