github.com/sri09kanth/helm@v3.0.0-beta.3+incompatible/pkg/cli/environment_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 cli
    18  
    19  import (
    20  	"os"
    21  	"strings"
    22  	"testing"
    23  
    24  	"github.com/spf13/pflag"
    25  )
    26  
    27  func TestEnvSettings(t *testing.T) {
    28  	tests := []struct {
    29  		name string
    30  
    31  		// input
    32  		args   string
    33  		envars map[string]string
    34  
    35  		// expected values
    36  		ns, kcontext string
    37  		debug        bool
    38  	}{
    39  		{
    40  			name: "defaults",
    41  			ns:   "",
    42  		},
    43  		{
    44  			name:  "with flags set",
    45  			args:  "--debug --namespace=myns",
    46  			ns:    "myns",
    47  			debug: true,
    48  		},
    49  		{
    50  			name:   "with envvars set",
    51  			envars: map[string]string{"HELM_DEBUG": "1", "HELM_NAMESPACE": "yourns"},
    52  			ns:     "yourns",
    53  			debug:  true,
    54  		},
    55  		{
    56  			name:   "with flags and envvars set",
    57  			args:   "--debug --namespace=myns",
    58  			envars: map[string]string{"HELM_DEBUG": "1", "HELM_NAMESPACE": "yourns"},
    59  			ns:     "myns",
    60  			debug:  true,
    61  		},
    62  	}
    63  
    64  	for _, tt := range tests {
    65  		t.Run(tt.name, func(t *testing.T) {
    66  			defer resetEnv()()
    67  
    68  			for k, v := range tt.envars {
    69  				os.Setenv(k, v)
    70  			}
    71  
    72  			flags := pflag.NewFlagSet("testing", pflag.ContinueOnError)
    73  
    74  			settings := &EnvSettings{}
    75  			settings.AddFlags(flags)
    76  			flags.Parse(strings.Split(tt.args, " "))
    77  
    78  			settings.Init(flags)
    79  
    80  			if settings.Debug != tt.debug {
    81  				t.Errorf("expected debug %t, got %t", tt.debug, settings.Debug)
    82  			}
    83  			if settings.Namespace != tt.ns {
    84  				t.Errorf("expected namespace %q, got %q", tt.ns, settings.Namespace)
    85  			}
    86  			if settings.KubeContext != tt.kcontext {
    87  				t.Errorf("expected kube-context %q, got %q", tt.kcontext, settings.KubeContext)
    88  			}
    89  		})
    90  	}
    91  }
    92  
    93  func resetEnv() func() {
    94  	origEnv := os.Environ()
    95  
    96  	// ensure any local envvars do not hose us
    97  	for _, e := range envMap {
    98  		os.Unsetenv(e)
    99  	}
   100  
   101  	return func() {
   102  		for _, pair := range origEnv {
   103  			kv := strings.SplitN(pair, "=", 2)
   104  			os.Setenv(kv[0], kv[1])
   105  		}
   106  	}
   107  }