config: data structures; basic tests

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: Ia7d6f19a46ec8a4987ea429ec6502f676a6a6964

internal/config/config_test.go

@@ -0,0 +1,44 @@
+package config
+
+import (
+	"testing"
+)
+
+func TestLoadConfig_ValidFile(t *testing.T) {
+	cfg, err := Load("../../testdata/config.valid.yaml")
+	if err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
+
+	if cfg.Site.Domain != "example.com" {
+		t.Errorf("expected domain 'example.com', got '%s'", cfg.Site.Domain)
+	}
+
+	if cfg.Site.SaltRotation != "daily" {
+		t.Errorf("expected salt_rotation 'daily', got '%s'", cfg.Site.SaltRotation)
+	}
+}
+
+func TestLoadConfig_MissingFile(t *testing.T) {
+	_, err := Load("nonexistent.yaml")
+	if err == nil {
+		t.Fatal("expected error for missing file, got nil")
+	}
+}
+
+func TestValidate_MaxPathsRequired(t *testing.T) {
+	cfg := &Config{
+		Site: SiteConfig{
+			Domain:       "example.com",
+			SaltRotation: "daily",
+		},
+		Limits: LimitsConfig{
+			MaxPaths: 0, // invalid
+		},
+	}
+
+	err := cfg.Validate()
+	if err == nil {
+		t.Fatal("expected validation error for max_paths=0, got nil")
+	}
+}