// 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 audit

import (
	"reflect"
	"testing"

	"golang.org/x/tools/go/packages"
	"golang.org/x/vulndb/osv"
)

type mockClient struct {
	ret map[string][]*osv.Entry
}

func (mc *mockClient) Get(a []string) ([]*osv.Entry, error) {
	return mc.ret[a[0]], nil
}

func TestFetchVulnerabilities(t *testing.T) {
	mc := &mockClient{
		ret: map[string][]*osv.Entry{
			"example.mod/a": {
				{ID: "a", Package: osv.Package{Name: "example.mod/a"}, Affects: osv.Affects{Ranges: []osv.AffectsRange{{Type: osv.TypeSemver, Fixed: "v2.0.0"}}}},
				{ID: "b", Package: osv.Package{Name: "example.mod/a"}, Affects: osv.Affects{Ranges: []osv.AffectsRange{{Type: osv.TypeSemver, Fixed: "v1.0.0"}}}},
			},
			"example.mod/b": {{ID: "c", Package: osv.Package{Name: "example.mod/b"}, Affects: osv.Affects{Ranges: []osv.AffectsRange{{Type: osv.TypeSemver, Fixed: "v1.0.0"}}}}},
			"example.mod/d": {{ID: "c", Package: osv.Package{Name: "example.mod/d"}, Affects: osv.Affects{Ranges: []osv.AffectsRange{{Type: osv.TypeSemver, Fixed: "v2.0.0"}}}}},
		},
	}

	mv, err := FetchVulnerabilities(mc, []*packages.Module{
		{Path: "example.mod/a", Version: "v1.0.0"},
		{Path: "example.mod/b", Version: "v1.0.0"},
		{Path: "example.mod/c", Replace: &packages.Module{Path: "example.mod/d", Version: "v1.0.0"}, Version: "v2.0.0"},
	})
	if err != nil {
		t.Fatalf("FetchVulnerabilities failed: %s", err)
	}

	expected := ModuleVulnerabilities{
		{
			mod: &packages.Module{Path: "example.mod/a", Version: "v1.0.0"},
			vulns: []*osv.Entry{
				{ID: "a", Package: osv.Package{Name: "example.mod/a"}, Affects: osv.Affects{Ranges: []osv.AffectsRange{{Type: osv.TypeSemver, Fixed: "v2.0.0"}}}},
			},
		},
		{
			mod: &packages.Module{Path: "example.mod/c", Replace: &packages.Module{Path: "example.mod/d", Version: "v1.0.0"}, Version: "v2.0.0"},
			vulns: []*osv.Entry{
				{ID: "c", Package: osv.Package{Name: "example.mod/d"}, Affects: osv.Affects{Ranges: []osv.AffectsRange{{Type: osv.TypeSemver, Fixed: "v2.0.0"}}}},
			},
		},
	}
	if !reflect.DeepEqual(mv, expected) {
		t.Fatalf("FetchVulnerabilities returned unexpected results, got:\n%s\nwant:\n%s", moduleVulnerabilitiesToString(mv), moduleVulnerabilitiesToString(expected))
	}
}