helm/pkg/plugin/installer/vcs_installer_test.go

/*
Copyright 2016 The Kubernetes 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 installer // import "k8s.io/helm/pkg/plugin/installer"

import (
	"fmt"
	"io/ioutil"
	"os"
	"path/filepath"
	"testing"

	"k8s.io/helm/pkg/helm/helmpath"

	"github.com/Masterminds/vcs"
)

var _ Installer = new(VCSInstaller)

type testRepo struct {
	local, remote, current string
	tags, branches         []string
	err                    error
	vcs.Repo
}

func (r *testRepo) LocalPath() string           { return r.local }
func (r *testRepo) Remote() string              { return r.remote }
func (r *testRepo) Update() error               { return r.err }
func (r *testRepo) Get() error                  { return r.err }
func (r *testRepo) IsReference(string) bool     { return false }
func (r *testRepo) Tags() ([]string, error)     { return r.tags, r.err }
func (r *testRepo) Branches() ([]string, error) { return r.branches, r.err }
func (r *testRepo) UpdateVersion(version string) error {
	r.current = version
	return r.err
}

func TestVCSInstaller(t *testing.T) {
	hh, err := ioutil.TempDir("", "helm-home-")
	if err != nil {
		t.Fatal(err)
	}
	defer os.RemoveAll(hh)

	home := helmpath.Home(hh)
	if err := os.MkdirAll(home.Plugins(), 0755); err != nil {
		t.Fatalf("Could not create %s: %s", home.Plugins(), err)
	}

	source := "https://github.com/adamreese/helm-env"
	testRepoPath, _ := filepath.Abs("../testdata/plugdir/echo")
	repo := &testRepo{
		local: testRepoPath,
		tags:  []string{"0.1.0", "0.1.1"},
	}

	i, err := NewForSource(source, "~0.1.0", home)
	if err != nil {
		t.Errorf("unexpected error: %s", err)
	}

	// ensure a VCSInstaller was returned
	vcsInstaller, ok := i.(*VCSInstaller)
	if !ok {
		t.Error("expected a VCSInstaller")
	}

	// set the testRepo in the VCSInstaller
	vcsInstaller.Repo = repo

	if err := Install(i); err != nil {
		t.Error(err)
	}
	if repo.current != "0.1.1" {
		t.Errorf("expected version '0.1.1', got %q", repo.current)
	}
	if i.Path() != home.Path("plugins", "helm-env") {
		t.Errorf("expected path '$HELM_HOME/plugins/helm-env', got %q", i.Path())
	}

	// Install again to test plugin exists error
	if err := Install(i); err == nil {
		t.Error("expected error for plugin exists, got none")
	} else if err.Error() != "plugin already exists" {
		t.Errorf("expected error for plugin exists, got (%v)", err)
	}
}

func TestVCSInstallerNonExistentVersion(t *testing.T) {
	hh, err := ioutil.TempDir("", "helm-home-")
	if err != nil {
		t.Fatal(err)
	}
	defer os.RemoveAll(hh)

	home := helmpath.Home(hh)
	if err := os.MkdirAll(home.Plugins(), 0755); err != nil {
		t.Fatalf("Could not create %s: %s", home.Plugins(), err)
	}

	source := "https://github.com/adamreese/helm-env"
	version := "0.2.0"

	i, err := NewForSource(source, version, home)
	if err != nil {
		t.Errorf("unexpected error: %s", err)
	}

	// ensure a VCSInstaller was returned
	_, ok := i.(*VCSInstaller)
	if !ok {
		t.Error("expected a VCSInstaller")
	}

	if err := Install(i); err == nil {
		t.Error("expected error for version does not exists, got none")
	} else if err.Error() != fmt.Sprintf("requested version %q does not exist for plugin %q", version, source) {
		t.Errorf("expected error for version does not exists, got (%v)", err)
	}
}