72 lines
2.0 KiB
Go
72 lines
2.0 KiB
Go
package main
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import (
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"flag"
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"os"
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"strings"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestFlags(t *testing.T) {
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// We manipulate the Args to set them up for the testcases
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// after this test we restore the initial args
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oldArgs := os.Args
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defer func() { os.Args = oldArgs }()
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cases := []struct {
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Name string
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Args []string
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ExpectedExit int
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ExpectedOutput string
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}{
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{
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"No flags",
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[]string{"testdata/first"},
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0,
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"alabama barcelona\nbarcelona california\ncalifornia denver\ncalifornia denver\nамур брянск\nбелгород волгоград\nволгоград геленджик",
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},
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{
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"Reverse",
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[]string{"-r", "testdata/first"},
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0,
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"волгоград геленджик\nбелгород волгоград\nамур брянск\ncalifornia denver\ncalifornia denver\nbarcelona california\nalabama barcelona",
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},
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{
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"Unique",
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[]string{"-u", "testdata/first"},
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0,
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"alabama barcelona\nbarcelona california\ncalifornia denver\nамур брянск\nбелгород волгоград\nволгоград геленджик",
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},
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{
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"Column 2",
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[]string{"-k=2", "testdata/first"},
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0,
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"alabama barcelona\nbarcelona california\ncalifornia denver\ncalifornia denver\nамур брянск\nбелгород волгоград\nволгоград геленджик",
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},
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}
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for _, tc := range cases {
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tc := tc
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t.Run(tc.Name, func(t *testing.T) {
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// this call is required because otherwise flags panics, if args are set between flag.Parse calls
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flag.CommandLine = flag.NewFlagSet(tc.Name, flag.ExitOnError)
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// we need a value to set Args[0] to, cause flag begins parsing at Args[1]
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os.Args = append([]string{tc.Name}, tc.Args...)
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assert.Equal(t, tc.ExpectedOutput, strings.Trim(run(), "\n"))
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})
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}
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}
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func BenchmarkRun(b *testing.B) {
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for i := 0; i < b.N; i++ {
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flag.CommandLine = flag.NewFlagSet("Bench", flag.ExitOnError)
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os.Args = append([]string{"Bench"}, "testdata/first")
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_ = run()
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}
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}
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