go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/common/clock/clockflag/duration_test.go (about)

     1  // Copyright 2015 The LUCI 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 clockflag
    16  
    17  import (
    18  	"encoding/json"
    19  	"flag"
    20  	"testing"
    21  	"time"
    22  
    23  	. "github.com/smartystreets/goconvey/convey"
    24  )
    25  
    26  func TestDuration(t *testing.T) {
    27  	t.Parallel()
    28  
    29  	Convey(`A Duration flag`, t, func() {
    30  		fs := flag.NewFlagSet("test", flag.ContinueOnError)
    31  		var d Duration
    32  		fs.Var(&d, "duration", "Test duration parameter.")
    33  
    34  		Convey(`Parses a 10-second Duration from "10s".`, func() {
    35  			err := fs.Parse([]string{"-duration", "10s"})
    36  			So(err, ShouldBeNil)
    37  			So(d, ShouldEqual, time.Second*10)
    38  			So(d.IsZero(), ShouldBeFalse)
    39  		})
    40  
    41  		Convey(`Returns an error when parsing "10z".`, func() {
    42  			err := fs.Parse([]string{"-duration", "10z"})
    43  			So(err, ShouldNotBeNil)
    44  		})
    45  
    46  		Convey(`When treated as a JSON field`, func() {
    47  			var s struct {
    48  				D Duration `json:"duration"`
    49  			}
    50  
    51  			testJSON := `{"duration":10}`
    52  			Convey(`Fails to unmarshal from `+testJSON+`.`, func() {
    53  				testJSON := testJSON
    54  				err := json.Unmarshal([]byte(testJSON), &s)
    55  				So(err, ShouldNotBeNil)
    56  			})
    57  
    58  			Convey(`Marshals correctly to duration string.`, func() {
    59  				testDuration := (5 * time.Second) + (2 * time.Minute)
    60  				s.D = Duration(testDuration)
    61  				testJSON, err := json.Marshal(&s)
    62  				So(err, ShouldBeNil)
    63  				So(string(testJSON), ShouldEqual, `{"duration":"2m5s"}`)
    64  
    65  				Convey(`And Unmarshals correctly.`, func() {
    66  					s.D = Duration(0)
    67  					err := json.Unmarshal([]byte(testJSON), &s)
    68  					So(err, ShouldBeNil)
    69  					So(s.D, ShouldEqual, testDuration)
    70  				})
    71  			})
    72  		})
    73  	})
    74  }