Validate Weather API endpoints and retries

internal/config/config_test.go

@@ -82,6 +82,36 @@ func TestDefaults(t *testing.T) {
 	}
 }
 
+func TestWeatherAPIBaseURLValidation(t *testing.T) {
+	tests := []struct {
+		name    string
+		baseURL string
+		wantErr string
+	}{
+		{name: "local HTTP", baseURL: "http://127.0.0.1:8080/weather/"},
+		{name: "local HTTPS", baseURL: "https://127.0.0.1:8443/weather/"},
+		{name: "unsupported scheme", baseURL: "ftp://weather.example.test/", wantErr: "weather_api.base_url must use http or https"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cfg := Defaults()
+			cfg.WeatherAPI.BaseURL = tt.baseURL
+
+			err := Validate(cfg)
+			if tt.wantErr == "" {
+				if err != nil {
+					t.Fatalf("Validate() error = %v", err)
+				}
+				return
+			}
+			if err == nil || !strings.Contains(err.Error(), tt.wantErr) {
+				t.Fatalf("Validate() error = %v, want %q", err, tt.wantErr)
+			}
+		})
+	}
+}
+
 func TestOutputDirectoryLoading(t *testing.T) {
 	tests := []struct {
 		name      string

internal/config/validate.go

@@ -23,6 +23,9 @@ func Validate(cfg Config) error {
 		if err != nil || parsed.Scheme == "" || parsed.Host == "" {
 			return fmt.Errorf("weather_api.base_url must be an absolute URL")
 		}
+		if !strings.EqualFold(parsed.Scheme, "http") && !strings.EqualFold(parsed.Scheme, "https") {
+			return fmt.Errorf("weather_api.base_url must use http or https")
+		}
 	}
 	if cfg.WeatherAPI.Timeout <= 0 {
 		return fmt.Errorf("weather_api.timeout must be greater than zero")