github.com/canthefason/helm@v2.2.1-0.20170221172616-16b043b8d505+incompatible/cmd/helm/dependency_update_test.go (about)

     1  /*
     2  Copyright 2016 The Kubernetes Authors All rights reserved.
     3  Licensed under the Apache License, Version 2.0 (the "License");
     4  you may not use this file except in compliance with the License.
     5  You may obtain a copy of the License at
     6  
     7  http://www.apache.org/licenses/LICENSE-2.0
     8  
     9  Unless required by applicable law or agreed to in writing, software
    10  distributed under the License is distributed on an "AS IS" BASIS,
    11  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  See the License for the specific language governing permissions and
    13  limitations under the License.
    14  */
    15  
    16  package main
    17  
    18  import (
    19  	"bytes"
    20  	"io/ioutil"
    21  	"os"
    22  	"path/filepath"
    23  	"strings"
    24  	"testing"
    25  
    26  	"github.com/ghodss/yaml"
    27  
    28  	"k8s.io/helm/cmd/helm/helmpath"
    29  	"k8s.io/helm/pkg/chartutil"
    30  	"k8s.io/helm/pkg/proto/hapi/chart"
    31  	"k8s.io/helm/pkg/provenance"
    32  	"k8s.io/helm/pkg/repo"
    33  	"k8s.io/helm/pkg/repo/repotest"
    34  )
    35  
    36  func TestDependencyUpdateCmd(t *testing.T) {
    37  	// Set up a testing helm home
    38  	oldhome := helmHome
    39  	hh, err := tempHelmHome(t)
    40  	if err != nil {
    41  		t.Fatal(err)
    42  	}
    43  	helmHome = hh
    44  	defer func() {
    45  		os.RemoveAll(hh)
    46  		helmHome = oldhome
    47  	}()
    48  
    49  	srv := repotest.NewServer(hh)
    50  	defer srv.Stop()
    51  	copied, err := srv.CopyCharts("testdata/testcharts/*.tgz")
    52  	if err != nil {
    53  		t.Fatal(err)
    54  	}
    55  	t.Logf("Copied charts:\n%s", strings.Join(copied, "\n"))
    56  	t.Logf("Listening on directory %s", srv.Root())
    57  
    58  	chartname := "depup"
    59  	if err := createTestingChart(hh, chartname, srv.URL()); err != nil {
    60  		t.Fatal(err)
    61  	}
    62  
    63  	out := bytes.NewBuffer(nil)
    64  	duc := &dependencyUpdateCmd{out: out}
    65  	duc.helmhome = helmpath.Home(hh)
    66  	duc.chartpath = filepath.Join(hh, chartname)
    67  
    68  	if err := duc.run(); err != nil {
    69  		output := out.String()
    70  		t.Logf("Output: %s", output)
    71  		t.Fatal(err)
    72  	}
    73  
    74  	output := out.String()
    75  	// This is written directly to stdout, so we have to capture as is.
    76  	if !strings.Contains(output, `update from the "test" chart repository`) {
    77  		t.Errorf("Repo did not get updated\n%s", output)
    78  	}
    79  
    80  	// Make sure the actual file got downloaded.
    81  	expect := filepath.Join(hh, chartname, "charts/reqtest-0.1.0.tgz")
    82  	if _, err := os.Stat(expect); err != nil {
    83  		t.Fatal(err)
    84  	}
    85  
    86  	hash, err := provenance.DigestFile(expect)
    87  	if err != nil {
    88  		t.Fatal(err)
    89  	}
    90  
    91  	i, err := repo.LoadIndexFile(duc.helmhome.CacheIndex("test"))
    92  	if err != nil {
    93  		t.Fatal(err)
    94  	}
    95  
    96  	reqver := i.Entries["reqtest"][0]
    97  	if h := reqver.Digest; h != hash {
    98  		t.Errorf("Failed hash match: expected %s, got %s", hash, h)
    99  	}
   100  
   101  	// Now change the dependencies and update. This verifies that on update,
   102  	// old dependencies are cleansed and new dependencies are added.
   103  	reqfile := &chartutil.Requirements{
   104  		Dependencies: []*chartutil.Dependency{
   105  			{Name: "reqtest", Version: "0.1.0", Repository: srv.URL()},
   106  			{Name: "compressedchart", Version: "0.3.0", Repository: srv.URL()},
   107  		},
   108  	}
   109  	dir := filepath.Join(hh, chartname)
   110  	if err := writeRequirements(dir, reqfile); err != nil {
   111  		t.Fatal(err)
   112  	}
   113  	if err := duc.run(); err != nil {
   114  		output := out.String()
   115  		t.Logf("Output: %s", output)
   116  		t.Fatal(err)
   117  	}
   118  
   119  	// In this second run, we should see compressedchart-0.3.0.tgz, and not
   120  	// the 0.1.0 version.
   121  	expect = filepath.Join(hh, chartname, "charts/compressedchart-0.3.0.tgz")
   122  	if _, err := os.Stat(expect); err != nil {
   123  		t.Fatalf("Expected %q: %s", expect, err)
   124  	}
   125  	dontExpect := filepath.Join(hh, chartname, "charts/compressedchart-0.1.0.tgz")
   126  	if _, err := os.Stat(dontExpect); err == nil {
   127  		t.Fatalf("Unexpected %q", dontExpect)
   128  	}
   129  }
   130  
   131  // createTestingChart creates a basic chart that depends on reqtest-0.1.0
   132  //
   133  // The baseURL can be used to point to a particular repository server.
   134  func createTestingChart(dest, name, baseURL string) error {
   135  	cfile := &chart.Metadata{
   136  		Name:    name,
   137  		Version: "1.2.3",
   138  	}
   139  	dir := filepath.Join(dest, name)
   140  	_, err := chartutil.Create(cfile, dest)
   141  	if err != nil {
   142  		return err
   143  	}
   144  	req := &chartutil.Requirements{
   145  		Dependencies: []*chartutil.Dependency{
   146  			{Name: "reqtest", Version: "0.1.0", Repository: baseURL},
   147  			{Name: "compressedchart", Version: "0.1.0", Repository: baseURL},
   148  		},
   149  	}
   150  	return writeRequirements(dir, req)
   151  }
   152  
   153  func writeRequirements(dir string, req *chartutil.Requirements) error {
   154  	data, err := yaml.Marshal(req)
   155  	if err != nil {
   156  		return err
   157  	}
   158  
   159  	return ioutil.WriteFile(filepath.Join(dir, "requirements.yaml"), data, 0655)
   160  }