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// Copyright 2022 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package flags
import (
"flag"
"testing"
"github.com/stretchr/testify/assert"
)
func TestUint32Value(t *testing.T) {
cases := []struct {
name string
s string
expectedVal uint32
expectError bool
}{
{
name: "normal uint32 value",
s: "200",
expectedVal: 200,
},
{
name: "zero value",
s: "0",
expectedVal: 0,
},
{
name: "negative int value",
s: "-200",
expectError: true,
},
{
name: "invalid integer value",
s: "invalid",
expectError: true,
},
}
for _, tc := range cases {
t.Run(tc.name, func(t *testing.T) {
var val uint32Value
err := val.Set(tc.s)
if tc.expectError {
if err == nil {
t.Errorf("Expected failure on parsing uint32 value from %s", tc.s)
}
} else {
if err != nil {
t.Errorf("Unexpected error when parsing %s: %v", tc.s, err)
}
assert.Equal(t, uint32(val), tc.expectedVal)
}
})
}
}
func TestUint32FromFlag(t *testing.T) {
const flagName = "max-concurrent-streams"
cases := []struct {
name string
defaultVal uint32
arguments []string
expectedVal uint32
}{
{
name: "only default value",
defaultVal: 15,
arguments: []string{},
expectedVal: 15,
},
{
name: "argument has different value from the default one",
defaultVal: 16,
arguments: []string{"--max-concurrent-streams", "200"},
expectedVal: 200,
},
{
name: "argument has the same value from the default one",
defaultVal: 105,
arguments: []string{"--max-concurrent-streams", "105"},
expectedVal: 105,
},
}
for _, tc := range cases {
t.Run(tc.name, func(t *testing.T) {
fs := flag.NewFlagSet("etcd", flag.ContinueOnError)
fs.Var(NewUint32Value(tc.defaultVal), flagName, "Maximum concurrent streams that each client can open at a time.")
if err := fs.Parse(tc.arguments); err != nil {
t.Fatalf("Unexpected error: %v\n", err)
}
actualMaxStream := Uint32FromFlag(fs, flagName)
assert.Equal(t, actualMaxStream, tc.expectedVal)
})
}
}
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