package gofmt

import (
	"os"
	"path/filepath"
	"testing"
)

func TestUnformattedNamesWhatGofmtChanges(t *testing.T) {
	root := t.TempDir()
	for f, src := range map[string]string{
		"modules/a/a.go":              "package a\n",
		"modules/b/b.go":              "package b\nimport (\n\t\"os\"\n\t\"fmt\"\n)\nvar _, _ = fmt.Sprint, os.Exit\n",
		"modules/c/testdata/c.go":     "package   c",
		"modules/d/node_modules/d.go": "package   d",
	} {
		p := filepath.Join(root, f)
		_ = os.MkdirAll(filepath.Dir(p), 0o755)
		if err := os.WriteFile(p, []byte(src), 0o644); err != nil {
			t.Fatal(err)
		}
	}
	files, err := Files(root)
	if err != nil {
		t.Fatal(err)
	}
	got, err := Unformatted(root, files)
	if err != nil {
		t.Fatal(err)
	}
	if len(files) != 2 || len(got) != 1 || got["modules/b/b.go"] == "" {
		t.Errorf("files %v, unformatted %v; want a.go and b.go read, b.go named", files, got)
	}
}

// The catalogue's own Go files are as gofmt writes them.
func TestTheCataloguesGoIsFormatted(t *testing.T) {
	root := filepath.Join("..", "..")
	files, err := Files(root)
	if err != nil {
		t.Fatal(err)
	}
	if len(files) == 0 {
		t.Fatal("no Go file found: the check reads nothing")
	}
	got, err := Unformatted(root, files)
	if err != nil {
		t.Fatal(err)
	}
	for f, why := range got {
		t.Errorf("%s: %s", f, why)
	}
}