cmd/recipe_wrapper/main_test.go

// Copyright 2023 The Fuchsia 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 (
	"context"
	"encoding/json"
	"os"
	"testing"

	"github.com/google/go-cmp/cmp"
	"github.com/google/go-cmp/cmp/cmpopts"
	"go.fuchsia.dev/infra/cmd/recipe_wrapper/cipd"
)

func TestOpenFilesInDir(t *testing.T) {
	tests := []struct {
		name string
		// One step to one file.
		// This makes the test simpler to reason about.
		files []*cipd.PkgFile
	}{
		{
			name: "Steps should be read back",
			files: []*cipd.PkgFile{
				{
					PackageName: "foo/bar",
					InstanceID:  "baz",
					Path:        "/tmp/foo/bar.pkg",
				},
				{
					PackageName: "alice/bob/charlie",
					InstanceID:  "dave",
					Path:        "/alice/bob/charlie.pkg",
				},
			},
		},
		{
			name: "Empty files should be acceptable",
			files: []*cipd.PkgFile{
				{},
				{
					PackageName: "foo/bar",
					InstanceID:  "baz",
					Path:        "/tmp/foo/bar.pkg",
				},
				{},
			},
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			tmpdir, err := os.MkdirTemp("", "main_test")
			if err != nil {
				t.Fatalf("couldn't make tempfile: %v", err)
			}

			for _, pkgFile := range test.files {
				f, err := os.CreateTemp(tmpdir, "")
				if err != nil {
					t.Fatalf("couldn't create tempfile: %v", err)
				}
				pkgJSON, err := json.Marshal(pkgFile)
				if err != nil {
					t.Fatalf("couldn't marshal to JSON: %v", err)
				}
				_, err = f.WriteString(string(pkgJSON))
				if err != nil {
					t.Fatalf("couldn't write JSON: %v", err)
				}
				t.Logf("wrote to %q\n", f.Name())
				f.Close()
			}

			got, err := pkgsInDir(context.Background(), tmpdir)
			if err != nil {
				t.Errorf("got error %q, want nil", err)
			}
			if diff := cmp.Diff(got, test.files, cmpopts.SortSlices(func(x, y *cipd.PkgFile) bool {
				return x.PackageName > y.PackageName
			})); diff != "" {
				t.Errorf("got diff: %v", diff)
			}
		})
	}

}