47 lines
1.1 KiB
Go
47 lines
1.1 KiB
Go
package arg
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import (
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"bytes"
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"os"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestWriteUsage(t *testing.T) {
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expectedUsage := "usage: example [--verbose] [--dataset DATASET] [--optimize OPTIMIZE] INPUT [OUTPUT [OUTPUT ...]]\n"
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expectedHelp := `usage: example [--verbose] [--dataset DATASET] [--optimize OPTIMIZE] INPUT [OUTPUT [OUTPUT ...]]
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positional arguments:
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input
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output
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options:
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--verbose, -v verbosity level
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--dataset DATASET dataset to use
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--optimize OPTIMIZE, -O OPTIMIZE
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optimization level
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`
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var args struct {
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Input string `arg:"positional"`
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Output []string `arg:"positional"`
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Verbose bool `arg:"-v,help:verbosity level"`
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Dataset string `arg:"help:dataset to use"`
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Optimize int `arg:"-O,help:optimization level"`
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}
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p, err := NewParser(&args)
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require.NoError(t, err)
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os.Args[0] = "example"
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var usage bytes.Buffer
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p.WriteUsage(&usage)
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assert.Equal(t, expectedUsage, usage.String())
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var help bytes.Buffer
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p.WriteHelp(&help)
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assert.Equal(t, expectedHelp, help.String())
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}
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