github.com/google/cloudprober@v0.11.3/sysvars/sysvars_test.go (about)

     1  // Copyright 2020 The Cloudprober Authors.
     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 sysvars
    16  
    17  import (
    18  	"fmt"
    19  	"reflect"
    20  	"testing"
    21  
    22  	"github.com/google/cloudprober/logger"
    23  )
    24  
    25  func TestProvidersToCheck(t *testing.T) {
    26  	flagToProviders := map[string][]string{
    27  		"auto": []string{"gce", "ec2"},
    28  		"gce":  []string{"gce"},
    29  		"ec2":  []string{"ec2"},
    30  		"none": nil,
    31  	}
    32  
    33  	for flagValue, expected := range flagToProviders {
    34  		t.Run("testing_with_cloud_metadata="+flagValue, func(t *testing.T) {
    35  			got := providersToCheck(flagValue)
    36  			if !reflect.DeepEqual(got, expected) {
    37  				t.Errorf("providersToCheck(%s)=%v, expected=%v", flagValue, got, expected)
    38  			}
    39  		})
    40  	}
    41  }
    42  
    43  var testGCEVars = map[string]string{
    44  	"platform": "gce",
    45  	"zone":     "gce-zone-1",
    46  }
    47  
    48  var testEC2Vars = map[string]string{
    49  	"platform": "ec2",
    50  	"zone":     "ec2-zone-1",
    51  }
    52  
    53  func testSetVars(vars, inVars map[string]string, onPlatform bool) (bool, error) {
    54  	if !onPlatform {
    55  		return onPlatform, nil
    56  	}
    57  	for k, v := range inVars {
    58  		vars[k] = v
    59  	}
    60  	return onPlatform, nil
    61  }
    62  
    63  func TestInitCloudMetadata(t *testing.T) {
    64  	sysVars = map[string]string{}
    65  
    66  	tests := []struct {
    67  		mode         string
    68  		onGCE, onEC2 bool
    69  		expected     map[string]string
    70  	}{
    71  		{
    72  			mode:     "auto",
    73  			onGCE:    true,
    74  			onEC2:    true,
    75  			expected: testGCEVars,
    76  		},
    77  		{
    78  			mode:     "auto",
    79  			onGCE:    false,
    80  			onEC2:    true,
    81  			expected: testEC2Vars,
    82  		},
    83  		{
    84  			mode:     "gce",
    85  			onGCE:    false,
    86  			onEC2:    true, // running on EC2, got nothing as looking for GCE
    87  			expected: map[string]string{},
    88  		},
    89  		{
    90  			mode:     "ec2",
    91  			onGCE:    true, // Running on GCE, got nothing as looking for EC2
    92  			onEC2:    false,
    93  			expected: map[string]string{},
    94  		},
    95  		{
    96  			mode:     "ec2", // Get EC2 metadata
    97  			onGCE:    true,
    98  			onEC2:    true,
    99  			expected: testEC2Vars,
   100  		},
   101  	}
   102  
   103  	for _, test := range tests {
   104  		t.Run(fmt.Sprintf("%v", test), func(t *testing.T) {
   105  			sysVars = map[string]string{}
   106  
   107  			gceVars = func(vars map[string]string, l *logger.Logger) (bool, error) {
   108  				return testSetVars(vars, testGCEVars, test.onGCE)
   109  			}
   110  			ec2Vars = func(vars map[string]string, l *logger.Logger) (bool, error) {
   111  				return testSetVars(vars, testEC2Vars, test.onEC2)
   112  			}
   113  
   114  			if err := initCloudMetadata(test.mode); err != nil {
   115  				t.Errorf("Got unexpected error: %v", err)
   116  			}
   117  			if !reflect.DeepEqual(sysVars, test.expected) {
   118  				t.Errorf("sysVars=%v, expected=%v", sysVars, test.expected)
   119  			}
   120  		})
   121  	}
   122  }