github.com/felipejfc/helm@v2.1.2+incompatible/cmd/helm/downloader/chart_downloader_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 downloader

import (
	"fmt"
	"io/ioutil"
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"testing"

	"k8s.io/helm/cmd/helm/helmpath"
	"k8s.io/helm/pkg/repo/repotest"
)

func TestResolveChartRef(t *testing.T) {
	tests := []struct {
		name, ref, expect, version string
		fail                       bool
	}{
		{name: "full URL", ref: "http://example.com/foo-1.2.3.tgz", expect: "http://example.com/foo-1.2.3.tgz"},
		{name: "full URL, HTTPS", ref: "https://example.com/foo-1.2.3.tgz", expect: "https://example.com/foo-1.2.3.tgz"},
		{name: "full URL, HTTPS, irrelevant version", ref: "https://example.com/foo-1.2.3.tgz", version: "0.1.0", expect: "https://example.com/foo-1.2.3.tgz"},
		{name: "reference, testing repo", ref: "testing/alpine", expect: "http://example.com/alpine-1.2.3.tgz"},
		{name: "reference, version, testing repo", ref: "testing/alpine", version: "0.2.0", expect: "http://example.com/alpine-0.2.0.tgz"},
		{name: "full URL, file", ref: "file:///foo-1.2.3.tgz", fail: true},
		{name: "invalid", ref: "invalid-1.2.3", fail: true},
		{name: "not found", ref: "nosuchthing/invalid-1.2.3", fail: true},
	}

	c := ChartDownloader{
		HelmHome: helmpath.Home("testdata/helmhome"),
		Out:      os.Stderr,
	}

	for _, tt := range tests {
		u, err := c.ResolveChartVersion(tt.ref, tt.version)
		if err != nil {
			if tt.fail {
				continue
			}
			t.Errorf("%s: failed with error %s", tt.name, err)
			continue
		}
		if got := u.String(); got != tt.expect {
			t.Errorf("%s: expected %s, got %s", tt.name, tt.expect, got)
		}
	}
}

func TestVerifyChart(t *testing.T) {
	v, err := VerifyChart("testdata/signtest-0.1.0.tgz", "testdata/helm-test-key.pub")
	if err != nil {
		t.Fatal(err)
	}
	// The verification is tested at length in the provenance package. Here,
	// we just want a quick sanity check that the v is not empty.
	if len(v.FileHash) == 0 {
		t.Error("Digest missing")
	}
}

func TestDownload(t *testing.T) {
	expect := "Call me Ishmael"
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprint(w, expect)
	}))
	defer srv.Close()

	got, err := download(srv.URL)
	if err != nil {
		t.Fatal(err)
	}

	if got.String() != expect {
		t.Errorf("Expected %q, got %q", expect, got.String())
	}
}

func TestIsTar(t *testing.T) {
	tests := map[string]bool{
		"foo.tgz":           true,
		"foo/bar/baz.tgz":   true,
		"foo-1.2.3.4.5.tgz": true,
		"foo.tar.gz":        false, // for our purposes
		"foo.tgz.1":         false,
		"footgz":            false,
	}

	for src, expect := range tests {
		if isTar(src) != expect {
			t.Errorf("%q should be %t", src, expect)
		}
	}
}

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

	dest := filepath.Join(hh, "dest")
	os.MkdirAll(dest, 0755)

	// Set up a fake repo
	srv := repotest.NewServer(hh)
	defer srv.Stop()
	if _, err := srv.CopyCharts("testdata/*.tgz*"); err != nil {
		t.Error(err)
		return
	}

	c := ChartDownloader{
		HelmHome: helmpath.Home("testdata/helmhome"),
		Out:      os.Stderr,
		Verify:   VerifyAlways,
		Keyring:  "testdata/helm-test-key.pub",
	}
	cname := "/signtest-0.1.0.tgz"
	where, v, err := c.DownloadTo(srv.URL()+cname, "", dest)
	if err != nil {
		t.Error(err)
		return
	}

	if expect := filepath.Join(dest, cname); where != expect {
		t.Errorf("Expected download to %s, got %s", expect, where)
	}

	if v.FileHash == "" {
		t.Error("File hash was empty, but verification is required.")
	}

	if _, err := os.Stat(filepath.Join(dest, cname)); err != nil {
		t.Error(err)
		return
	}
}

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

	dest := filepath.Join(hh, "dest")
	os.MkdirAll(dest, 0755)

	// Set up a fake repo
	srv := repotest.NewServer(hh)
	defer srv.Stop()
	if _, err := srv.CopyCharts("testdata/*.tgz*"); err != nil {
		t.Error(err)
		return
	}

	c := ChartDownloader{
		HelmHome: helmpath.Home("testdata/helmhome"),
		Out:      os.Stderr,
		Verify:   VerifyLater,
	}
	cname := "/signtest-0.1.0.tgz"
	where, _, err := c.DownloadTo(srv.URL()+cname, "", dest)
	if err != nil {
		t.Error(err)
		return
	}

	if expect := filepath.Join(dest, cname); where != expect {
		t.Errorf("Expected download to %s, got %s", expect, where)
	}

	if _, err := os.Stat(filepath.Join(dest, cname)); err != nil {
		t.Error(err)
		return
	}
	if _, err := os.Stat(filepath.Join(dest, cname+".prov")); err != nil {
		t.Error(err)
		return
	}
}