agones.dev/agones@v1.53.0/pkg/util/runtime/features_test.go (about)

     1  // Copyright 2020 Google LLC All Rights Reserved.
     2  //
     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  package runtime
    16  
    17  import (
    18  	"os"
    19  	"strings"
    20  	"testing"
    21  
    22  	"github.com/spf13/pflag"
    23  	"github.com/spf13/viper"
    24  	"github.com/stretchr/testify/assert"
    25  )
    26  
    27  func TestFeatures(t *testing.T) {
    28  	t.Parallel()
    29  	FeatureTestMutex.Lock()
    30  	defer FeatureTestMutex.Unlock()
    31  
    32  	orig := featureDefaults
    33  	// stable feature flag state
    34  	featureDefaults = map[Feature]bool{
    35  		FeatureExample:  true,
    36  		Feature("Test"): false,
    37  	}
    38  
    39  	t.Run("invalid Feature gate", func(t *testing.T) {
    40  		err := ParseFeatures("Foo")
    41  		assert.EqualError(t, err, "Feature Gate \"Foo\" is not a valid Feature Gate")
    42  	})
    43  
    44  	t.Run("Empty query string", func(t *testing.T) {
    45  		err := ParseFeatures("")
    46  		assert.NoError(t, err)
    47  		assert.True(t, FeatureEnabled(FeatureExample))
    48  		assert.Equal(t, "Example=true&Test=false", EncodeFeatures())
    49  	})
    50  
    51  	t.Run("query string", func(t *testing.T) {
    52  		err := ParseFeatures("Example=0&Test=1")
    53  		assert.NoError(t, err)
    54  		assert.False(t, FeatureEnabled(FeatureExample))
    55  		assert.True(t, FeatureEnabled(Feature("Test")))
    56  		assert.Equal(t, "Example=false&Test=true", EncodeFeatures())
    57  		err = ParseFeatures(EncodeFeatures())
    58  		assert.NoError(t, err)
    59  		assert.False(t, FeatureEnabled(FeatureExample))
    60  		assert.True(t, FeatureEnabled(Feature("Test")))
    61  	})
    62  
    63  	t.Run("Error on query parsing", func(t *testing.T) {
    64  		err := ParseFeatures("Example=foobar")
    65  		assert.Error(t, err)
    66  	})
    67  
    68  	t.Run("parse env vars", func(t *testing.T) {
    69  		assert.NoError(t, os.Setenv("FEATURE_GATES", "Test=true"))
    70  
    71  		FeaturesBindFlags()
    72  		pflag.Parse()
    73  		viper.SetEnvKeyReplacer(strings.NewReplacer("-", "_"))
    74  		assert.NoError(t, FeaturesBindEnv())
    75  		assert.NoError(t, ParseFeaturesFromEnv())
    76  
    77  		assert.True(t, FeatureEnabled(Feature("Test")))
    78  		assert.True(t, FeatureEnabled(FeatureExample))
    79  	})
    80  
    81  	// reset things back the way they were
    82  	featureDefaults = orig
    83  }
    84  
    85  func TestEnableAllFeatures(t *testing.T) {
    86  	t.Parallel()
    87  	FeatureTestMutex.Lock()
    88  	defer FeatureTestMutex.Unlock()
    89  
    90  	orig := featureDefaults
    91  	// stable feature flag state
    92  	featureDefaults = map[Feature]bool{
    93  		FeatureExample:  true,
    94  		Feature("Test"): false,
    95  	}
    96  
    97  	err := ParseFeatures("Example=0&Test=0")
    98  	assert.NoError(t, err)
    99  	assert.False(t, FeatureEnabled("Example"))
   100  	assert.False(t, FeatureEnabled("Test"))
   101  
   102  	EnableAllFeatures()
   103  
   104  	assert.True(t, FeatureEnabled("Example"))
   105  	assert.True(t, FeatureEnabled("Test"))
   106  
   107  	// reset things back the way they were
   108  	featureDefaults = orig
   109  }