bslash := strings.HasPrefix(b, "/")
	switch {
	case aslash && bslash:
		return a + b[1:]
	case !aslash && !bslash:
		return a + "/" + b
	}
	return a + b
}

func joinURLPath(a, b *url.URL) (path, rawpath string) {
	if a.RawPath == "" && b.RawPath == "" {
		return singleJoiningSlash(a.Path, b.Path), ""
	}
	// Same as singleJoiningSlash, but uses EscapedPath to determine

		{&url.URL{Path: "/a/b/", RawPath: "/a%2Fb/"}, &url.URL{Path: "/c/d", RawPath: "/c%2Fd"}, "/a/b/c/d", "/a%2Fb/c%2Fd"},
	}

	for _, tt := range tests {
		p, rp := joinURLPath(tt.a, tt.b)
		if p != tt.wantPath || rp != tt.wantRaw {
			t.Errorf("joinURLPath(URL(%q,%q),URL(%q,%q)) want (%q,%q) got (%q,%q)",
				tt.a.Path, tt.a.RawPath,
				tt.b.Path, tt.b.RawPath,
				tt.wantPath, tt.wantRaw,
				p, rp)
		}
	}