Initial GoWallpaper implementation

config_test.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"path/filepath"
+	"testing"
+)
+
+func TestLoadOrCreateConfig(t *testing.T) {
+	path := filepath.Join(t.TempDir(), configFileName)
+	cfg, created, err := loadOrCreateConfig(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !created {
+		t.Fatal("expected configuration to be created")
+	}
+	if cfg.IntervalMinutes != 30 || cfg.MaxCacheCount != 10 || cfg.WallpaperStyle != "keep" {
+		t.Fatalf("unexpected defaults: %+v", cfg)
+	}
+
+	loaded, created, err := loadOrCreateConfig(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if created || loaded != cfg {
+		t.Fatalf("unexpected loaded config: %+v", loaded)
+	}
+}
+
+func TestConfigValidation(t *testing.T) {
+	cfg := defaultConfig()
+	if err := cfg.validate(true); err == nil {
+		t.Fatal("expected empty API URL to fail when required")
+	}
+	cfg.APIURL = "ftp://example.com/image.jpg"
+	if err := cfg.validate(false); err == nil {
+		t.Fatal("expected non-http URL to fail")
+	}
+	cfg.APIURL = "https://example.com/random"
+	if err := cfg.validate(true); err != nil {
+		t.Fatal(err)
+	}
+}