Generated Wiki Stale Purge Method (#5)

Reviewed-on: https://gitea.westgate.pw/ShadowsOverWestgate/sow-tools/pulls/5
Co-authored-by: vickydotbat <vickydotbat@tutamail.com>
Co-committed-by: vickydotbat <vickydotbat@tutamail.com>

internal/project/project_test.go

@@ -3,6 +3,7 @@ package project
 import (
 	"bytes"
 	"errors"
+	"fmt"
 	"os"
 	"path/filepath"
 	"reflect"
@@ -377,6 +378,64 @@ autogen:
 	}
 }
 
+func TestProjectValidationAcceptsWikiStalePurgePolicy(t *testing.T) {
+	root := t.TempDir()
+	mkdirAll(t, filepath.Join(root, "src"))
+	mkdirAll(t, filepath.Join(root, "build"))
+	writeProjectFile(t, filepath.Join(root, ConfigFile), `
+module:
+  name: Test Module
+  resref: testmod
+paths:
+  source: src
+  build: build
+topdata:
+  wiki:
+    stale_pages:
+      default: report
+      live_cleanup: purge
+`)
+
+	proj, err := Load(root)
+	if err != nil {
+		t.Fatalf("load project: %v", err)
+	}
+	if err := proj.ValidateLayout(); err != nil {
+		t.Fatalf("validate purge stale policy: %v", err)
+	}
+}
+
+func TestProjectValidationRejectsUnsupportedWikiStalePolicies(t *testing.T) {
+	for _, policy := range []string{"unpublish", "remove-everything"} {
+		t.Run(policy, func(t *testing.T) {
+			root := t.TempDir()
+			mkdirAll(t, filepath.Join(root, "src"))
+			mkdirAll(t, filepath.Join(root, "build"))
+			writeProjectFile(t, filepath.Join(root, ConfigFile), fmt.Sprintf(`
+module:
+  name: Test Module
+  resref: testmod
+paths:
+  source: src
+  build: build
+topdata:
+  wiki:
+    stale_pages:
+      live_cleanup: %s
+`, policy))
+
+			proj, err := Load(root)
+			if err != nil {
+				t.Fatalf("load project: %v", err)
+			}
+			err = proj.ValidateLayout()
+			if err == nil || !strings.Contains(err.Error(), policy) {
+				t.Fatalf("expected %q stale policy validation failure, got %v", policy, err)
+			}
+		})
+	}
+}
+
 func TestValidateLayoutRejectsInvalidExtractMergeRules(t *testing.T) {
 	tests := []struct {
 		name    string