This test checks the behavior of standalone packages, in particular documenting
our failure to support test files as standalone packages (golang/go#64233).

-- flags --
-min_go=go1.20

-- go.mod --
module golang.org/lsptests/a

go 1.20

-- a.go --
package a

func F() {} //@loc(F, "F")

-- standalone.go --
//go:build ignore
package main

import "golang.org/lsptests/a"

func main() {
	a.F() //@def("F", F)
}

-- standalone_test.go --
//go:build ignore
package main //@diag("main", re"No packages found")

import "golang.org/lsptests/a"

func main() {
	a.F() //@hovererr("F", "no package")
}

-- standalone_x_test.go --
//go:build ignore
package main_test //@diag("main", re"No packages found")

import "golang.org/lsptests/a"

func main() {
	a.F() //@hovererr("F", "no package")
}