package app

import (
	"context"
	"crypto/x509"
	"net"
	"net/url"
	"strings"
	"syscall"
	"testing"
)

func TestSubscriptionDownloadErrorsExplainCauseWithoutURL(t *testing.T) {
	for _, test := range []struct {
		err    error
		phrase string
	}{
		{x509.UnknownAuthorityError{}, "CA 证书包"},
		{x509.HostnameError{}, "域名不匹配"},
		{x509.CertificateInvalidError{}, "证书校验失败"},
		{&net.DNSError{Err: "no such host", Name: "private.example"}, "域名解析失败"},
		{context.DeadlineExceeded, "下载超时"},
		{context.Canceled, "已取消"},
		{syscall.ECONNREFUSED, "连接被拒绝"},
	} {
		wrapped := &url.Error{Op: "Get", URL: "https://private.example/sub?token=secret-token", Err: test.err}
		message := subscriptionDownloadError(wrapped).Error()
		if !strings.Contains(message, test.phrase) {
			t.Fatalf("cause not explained: %s", message)
		}
		if strings.Contains(message, "secret-token") || strings.Contains(message, "private.example") {
			t.Fatal("download error exposed subscription URL")
		}
	}
}