87 lines
1.9 KiB
Go
87 lines
1.9 KiB
Go
package cli
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import (
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"fmt"
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"io"
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"os"
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"path/filepath"
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"testing"
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"git.numtide.com/numtide/treefmt/stats"
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"git.numtide.com/numtide/treefmt/test"
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"github.com/alecthomas/kong"
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"github.com/stretchr/testify/require"
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)
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func newKong(t *testing.T, cli interface{}, options ...kong.Option) *kong.Kong {
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t.Helper()
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options = append([]kong.Option{
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kong.Name("test"),
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kong.Exit(func(int) {
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t.Helper()
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t.Fatalf("unexpected exit()")
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}),
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}, options...)
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parser, err := kong.New(cli, options...)
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require.NoError(t, err)
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return parser
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}
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func cmd(t *testing.T, args ...string) ([]byte, error) {
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t.Helper()
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// create a new kong context
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p := newKong(t, &Cli)
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ctx, err := p.Parse(args)
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if err != nil {
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return nil, err
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}
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tempDir := t.TempDir()
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tempOut := test.TempFile(t, filepath.Join(tempDir, "combined_output"))
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// capture standard outputs before swapping them
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stdout := os.Stdout
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stderr := os.Stderr
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// swap them temporarily
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os.Stdout = tempOut
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os.Stderr = tempOut
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// run the command
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if err = ctx.Run(); err != nil {
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return nil, err
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}
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// reset and read the temporary output
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if _, err = tempOut.Seek(0, 0); err != nil {
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return nil, fmt.Errorf("failed to reset temp output for reading: %w", err)
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}
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out, err := io.ReadAll(tempOut)
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if err != nil {
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return nil, fmt.Errorf("failed to read temp output: %w", err)
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}
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// swap outputs back
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os.Stdout = stdout
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os.Stderr = stderr
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return out, nil
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}
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func assertStats(t *testing.T, as *require.Assertions, traversed int32, emitted int32, matched int32, formatted int32) {
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t.Helper()
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as.Equal(traversed, stats.Value(stats.Traversed))
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as.Equal(emitted, stats.Value(stats.Emitted))
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as.Equal(matched, stats.Value(stats.Matched))
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as.Equal(formatted, stats.Value(stats.Formatted))
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}
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func assertFormatted(t *testing.T, as *require.Assertions, output []byte, count int) {
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t.Helper()
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as.Contains(string(output), fmt.Sprintf("formatted %d files", count))
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}
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