// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

import (
	"path"
	"testing"

	"github.com/google/go-cmp/cmp"
	"golang.org/x/tools/go/packages/packagestest"
	"golang.org/x/vulndb/internal/report"
)

func TestExportedFunctions(t *testing.T) {
	e := packagestest.Export(t, packagestest.Modules, []packagestest.Module{
		{
			Name: "example.com/m",
			Files: map[string]interface{}{
				"p/a.go": `
					package p
					func vuln() {}
					func ok() {}
				`,
				"p/b.go": `
					package p
					func Exp() { vuln() }
					func Trans() { Exp() }
					func Fine() { ok() }
				`,
			},
		},
	})
	defer e.Cleanup()

	rc := newReportClient(&report.Report{
		Packages: []report.Package{{
			Module:  "example.com/m",
			Package: "example.com/m/p",
			Symbols: []string{"vuln"},
		}},
	})
	pkgs, err := loadPackage(e.Config, path.Join(e.Temp(), "m/p"))
	if err != nil {
		t.Fatal(err)
	}
	// Clear Module.Dir so vulncheck doesn't think that the module is local and ignore it.
	// Set Module.Version so vulncheck doesn't filter it out.
	for _, p := range pkgs {
		p.Module.Dir = ""
		p.Module.Version = "v1.0.0"
	}
	got, err := exportedFunctions(pkgs, rc)
	if err != nil {
		t.Fatal(err)
	}
	want := map[string]bool{"Exp": true, "Trans": true}
	if !cmp.Equal(got, want) {
		t.Errorf("\ngot\n\t%v\nwant\n\t%v", got, want)
	}
}