uint32_test.go

Documentation: go.etcd.io/etcd/pkg/v3/flags

     1  // Copyright 2022 The etcd 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 flags
    16  
    17  import (
    18  	"flag"
    19  	"testing"
    20  
    21  	"github.com/stretchr/testify/assert"
    22  )
    23  
    24  func TestUint32Value(t *testing.T) {
    25  	cases := []struct {
    26  		name        string
    27  		s           string
    28  		expectedVal uint32
    29  		expectError bool
    30  	}{
    31  		{
    32  			name:        "normal uint32 value",
    33  			s:           "200",
    34  			expectedVal: 200,
    35  		},
    36  		{
    37  			name:        "zero value",
    38  			s:           "0",
    39  			expectedVal: 0,
    40  		},
    41  		{
    42  			name:        "negative int value",
    43  			s:           "-200",
    44  			expectError: true,
    45  		},
    46  		{
    47  			name:        "invalid integer value",
    48  			s:           "invalid",
    49  			expectError: true,
    50  		},
    51  	}
    52  	for _, tc := range cases {
    53  		t.Run(tc.name, func(t *testing.T) {
    54  			var val uint32Value
    55  			err := val.Set(tc.s)
    56  
    57  			if tc.expectError {
    58  				if err == nil {
    59  					t.Errorf("Expected failure on parsing uint32 value from %s", tc.s)
    60  				}
    61  			} else {
    62  				if err != nil {
    63  					t.Errorf("Unexpected error when parsing %s: %v", tc.s, err)
    64  				}
    65  				assert.Equal(t, uint32(val), tc.expectedVal)
    66  			}
    67  		})
    68  	}
    69  }
    70  
    71  func TestUint32FromFlag(t *testing.T) {
    72  	const flagName = "max-concurrent-streams"
    73  
    74  	cases := []struct {
    75  		name        string
    76  		defaultVal  uint32
    77  		arguments   []string
    78  		expectedVal uint32
    79  	}{
    80  		{
    81  			name:        "only default value",
    82  			defaultVal:  15,
    83  			arguments:   []string{},
    84  			expectedVal: 15,
    85  		},
    86  		{
    87  			name:        "argument has different value from the default one",
    88  			defaultVal:  16,
    89  			arguments:   []string{"--max-concurrent-streams", "200"},
    90  			expectedVal: 200,
    91  		},
    92  		{
    93  			name:        "argument has the same value from the default one",
    94  			defaultVal:  105,
    95  			arguments:   []string{"--max-concurrent-streams", "105"},
    96  			expectedVal: 105,
    97  		},
    98  	}
    99  
   100  	for _, tc := range cases {
   101  		t.Run(tc.name, func(t *testing.T) {
   102  			fs := flag.NewFlagSet("etcd", flag.ContinueOnError)
   103  			fs.Var(NewUint32Value(tc.defaultVal), flagName, "Maximum concurrent streams that each client can open at a time.")
   104  			if err := fs.Parse(tc.arguments); err != nil {
   105  				t.Fatalf("Unexpected error: %v\n", err)
   106  			}
   107  			actualMaxStream := Uint32FromFlag(fs, flagName)
   108  			assert.Equal(t, actualMaxStream, tc.expectedVal)
   109  		})
   110  	}
   111  }
   112
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