github.com/liuming-dev/helm@v3.0.0-beta.3+incompatible/cmd/helm/helm_test.go (about)

     1  /*
     2  Copyright The Helm Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package main
    18  
    19  import (
    20  	"bytes"
    21  	"io/ioutil"
    22  	"os"
    23  	"strings"
    24  	"testing"
    25  	"time"
    26  
    27  	shellwords "github.com/mattn/go-shellwords"
    28  	"github.com/spf13/cobra"
    29  
    30  	"helm.sh/helm/internal/test"
    31  	"helm.sh/helm/pkg/action"
    32  	"helm.sh/helm/pkg/chartutil"
    33  	kubefake "helm.sh/helm/pkg/kube/fake"
    34  	"helm.sh/helm/pkg/release"
    35  	"helm.sh/helm/pkg/storage"
    36  	"helm.sh/helm/pkg/storage/driver"
    37  )
    38  
    39  func testTimestamper() time.Time { return time.Unix(242085845, 0).UTC() }
    40  
    41  func init() {
    42  	action.Timestamper = testTimestamper
    43  }
    44  
    45  func runTestCmd(t *testing.T, tests []cmdTestCase) {
    46  	t.Helper()
    47  	for _, tt := range tests {
    48  		t.Run(tt.name, func(t *testing.T) {
    49  			defer resetEnv()()
    50  
    51  			storage := storageFixture()
    52  			for _, rel := range tt.rels {
    53  				if err := storage.Create(rel); err != nil {
    54  					t.Fatal(err)
    55  				}
    56  			}
    57  			t.Log("running cmd: ", tt.cmd)
    58  			_, out, err := executeActionCommandC(storage, tt.cmd)
    59  			if (err != nil) != tt.wantError {
    60  				t.Errorf("expected error, got '%v'", err)
    61  			}
    62  			if tt.golden != "" {
    63  				test.AssertGoldenString(t, out, tt.golden)
    64  			}
    65  		})
    66  	}
    67  }
    68  
    69  func runTestActionCmd(t *testing.T, tests []cmdTestCase) {
    70  	t.Helper()
    71  	for _, tt := range tests {
    72  		t.Run(tt.name, func(t *testing.T) {
    73  			defer resetEnv()()
    74  
    75  			store := storageFixture()
    76  			for _, rel := range tt.rels {
    77  				store.Create(rel)
    78  			}
    79  			_, out, err := executeActionCommandC(store, tt.cmd)
    80  			if (err != nil) != tt.wantError {
    81  				t.Errorf("expected error, got '%v'", err)
    82  			}
    83  			if tt.golden != "" {
    84  				test.AssertGoldenString(t, out, tt.golden)
    85  			}
    86  		})
    87  	}
    88  }
    89  
    90  func storageFixture() *storage.Storage {
    91  	return storage.Init(driver.NewMemory())
    92  }
    93  
    94  func executeActionCommandC(store *storage.Storage, cmd string) (*cobra.Command, string, error) {
    95  	args, err := shellwords.Parse(cmd)
    96  	if err != nil {
    97  		return nil, "", err
    98  	}
    99  	buf := new(bytes.Buffer)
   100  
   101  	actionConfig := &action.Configuration{
   102  		Releases:     store,
   103  		KubeClient:   &kubefake.PrintingKubeClient{Out: ioutil.Discard},
   104  		Capabilities: chartutil.DefaultCapabilities,
   105  		Log:          func(format string, v ...interface{}) {},
   106  	}
   107  
   108  	root := newRootCmd(actionConfig, buf, args)
   109  	root.SetOutput(buf)
   110  	root.SetArgs(args)
   111  
   112  	c, err := root.ExecuteC()
   113  
   114  	return c, buf.String(), err
   115  }
   116  
   117  // cmdTestCase describes a test case that works with releases.
   118  type cmdTestCase struct {
   119  	name      string
   120  	cmd       string
   121  	golden    string
   122  	wantError bool
   123  	// Rels are the available releases at the start of the test.
   124  	rels []*release.Release
   125  }
   126  
   127  func executeActionCommand(cmd string) (*cobra.Command, string, error) {
   128  	return executeActionCommandC(storageFixture(), cmd)
   129  }
   130  
   131  func resetEnv() func() {
   132  	origSettings, origEnv := settings, os.Environ()
   133  	return func() {
   134  		os.Clearenv()
   135  		settings = origSettings
   136  		for _, pair := range origEnv {
   137  			kv := strings.SplitN(pair, "=", 2)
   138  			os.Setenv(kv[0], kv[1])
   139  		}
   140  	}
   141  }
   142  
   143  func testChdir(t *testing.T, dir string) func() {
   144  	t.Helper()
   145  	old, err := os.Getwd()
   146  	if err != nil {
   147  		t.Fatal(err)
   148  	}
   149  	if err := os.Chdir(dir); err != nil {
   150  		t.Fatal(err)
   151  	}
   152  	return func() { os.Chdir(old) }
   153  }