/* Copyright 2016 The Bazel Authors. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package main

import (
	"os"
	"reflect"
	"testing"

	"golang.org/x/tools/go/vcs"
)

var root = &vcs.RepoRoot{
	VCS:  vcs.ByCmd("git"),
	Repo: "https://github.com/bazeltest/rules_go",
	Root: "github.com/bazeltest/rules_go",
}

func TestMain(m *testing.M) {
	// Replace vcs.RepoRootForImportPath to disable any network calls.
	repoRootForImportPath = func(_ string, _ bool) (*vcs.RepoRoot, error) {
		return root, nil
	}
	os.Exit(m.Run())
}

func TestGetRepoRoot(t *testing.T) {
	for _, tc := range []struct {
		label      string
		remote     string
		cmd        string
		importpath string
		r          *vcs.RepoRoot
	}{
		{
			label:      "all",
			remote:     "https://github.com/bazeltest/rules_go",
			cmd:        "git",
			importpath: "github.com/bazeltest/rules_go",
			r:          root,
		},
		{
			label:      "different remote",
			remote:     "https://example.com/rules_go",
			cmd:        "git",
			importpath: "github.com/bazeltest/rules_go",
			r: &vcs.RepoRoot{
				VCS:  vcs.ByCmd("git"),
				Repo: "https://example.com/rules_go",
				Root: "github.com/bazeltest/rules_go",
			},
		},
		{
			label:      "only importpath",
			importpath: "github.com/bazeltest/rules_go",
			r:          root,
		},
	} {
		r, err := getRepoRoot(tc.remote, tc.cmd, tc.importpath)
		if err != nil {
			t.Errorf("[%s] %v", tc.label, err)
		}
		if !reflect.DeepEqual(r, tc.r) {
			t.Errorf("[%s] Expected %+v, got %+v", tc.label, tc.r, r)
		}
	}
}

func TestGetRepoRoot_error(t *testing.T) {
	for _, tc := range []struct {
		label      string
		remote     string
		cmd        string
		importpath string
	}{
		{
			label:  "importpath as remote",
			remote: "github.com/bazeltest/rules_go",
		},
		{
			label:      "missing vcs",
			remote:     "https://github.com/bazeltest/rules_go",
			importpath: "github.com/bazeltest/rules_go",
		},
		{
			label:      "missing remote",
			cmd:        "git",
			importpath: "github.com/bazeltest/rules_go",
		},
	} {
		r, err := getRepoRoot(tc.remote, tc.cmd, tc.importpath)
		if err == nil {
			t.Errorf("[%s] expected error. Got %+v", tc.label, r)
		}
	}
}
