go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/luciexe/output_flag_test.go (about)

     1  // Copyright 2019 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 luciexe
    16  
    17  import (
    18  	"flag"
    19  	"io"
    20  	"testing"
    21  
    22  	. "github.com/smartystreets/goconvey/convey"
    23  	. "go.chromium.org/luci/common/testing/assertions"
    24  )
    25  
    26  func TestOutputFlag(t *testing.T) {
    27  	t.Parallel()
    28  
    29  	Convey(`OutputFlag`, t, func() {
    30  		fs := &flag.FlagSet{}
    31  		fs.SetOutput(io.Discard)
    32  		of := AddOutputFlagToSet(fs)
    33  
    34  		Convey(`good`, func() {
    35  			Convey(`empty`, func() {
    36  				So(fs.Parse(nil), ShouldBeNil)
    37  				So(of.Path, ShouldBeEmpty)
    38  				So(of.Codec, ShouldResemble, buildFileCodecNoop{})
    39  			})
    40  
    41  			Convey(`missing`, func() {
    42  				So(fs.Parse([]string{"other", "stuff"}), ShouldBeNil)
    43  				So(of.Path, ShouldBeEmpty)
    44  				So(of.Codec, ShouldResemble, buildFileCodecNoop{})
    45  			})
    46  
    47  			Convey(`equal`, func() {
    48  				So(fs.Parse([]string{OutputCLIArg + "=out.textpb", "a", "b"}), ShouldBeNil)
    49  				So(of.Path, ShouldResemble, "out.textpb")
    50  				So(of.Codec, ShouldResemble, buildFileCodecText{})
    51  				So(fs.Args(), ShouldResemble, []string{"a", "b"})
    52  			})
    53  
    54  			Convey(`two val`, func() {
    55  				So(fs.Parse([]string{OutputCLIArg, "out.json", "a", "b"}), ShouldBeNil)
    56  				So(of.Path, ShouldResemble, "out.json")
    57  				So(of.Codec, ShouldResemble, buildFileCodecJSON{})
    58  				So(fs.Args(), ShouldResemble, []string{"a", "b"})
    59  			})
    60  
    61  			Convey(`explicit noop`, func() {
    62  				So(fs.Parse([]string{OutputCLIArg + "="}), ShouldBeNil)
    63  				So(of.Path, ShouldBeEmpty)
    64  				So(of.Codec, ShouldResemble, buildFileCodecNoop{})
    65  			})
    66  
    67  		})
    68  
    69  		Convey(`bad`, func() {
    70  			Convey(`incomplete`, func() {
    71  				So(fs.Parse([]string{OutputCLIArg}), ShouldErrLike, "flag needs an argument")
    72  				So(of.Path, ShouldBeEmpty)
    73  				So(of.Codec, ShouldResemble, buildFileCodecNoop{})
    74  			})
    75  
    76  			Convey(`bad extension`, func() {
    77  				So(fs.Parse([]string{OutputCLIArg, "nope", "arg"}), ShouldErrLike, "bad extension")
    78  				So(of.Path, ShouldBeEmpty)
    79  				So(of.Codec, ShouldResemble, buildFileCodecNoop{})
    80  			})
    81  		})
    82  	})
    83  }