49 lines
1.5 KiB
Go
49 lines
1.5 KiB
Go
package engine
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import (
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"io/fs"
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"os"
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"path/filepath"
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"testing"
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)
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// Files disappearing between filesystem operations are not deterministic with
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// real concurrent deletion. Exercise the private seam that controls optionality.
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func TestRegularFileMissingFailurePhases(t *testing.T) {
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name := filepath.Join(t.TempDir(), "input.yml")
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if err := os.WriteFile(name, []byte("{}"), 0o600); err != nil {
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t.Fatal(err)
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}
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for _, test := range []struct {
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name string
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stat func(string) (fs.FileInfo, error)
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open func(string) (*os.File, error)
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missing bool
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}{
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{"preflight", func(string) (fs.FileInfo, error) { return nil, fs.ErrNotExist }, os.Open, true},
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{"open", os.Stat, func(string) (*os.File, error) { return nil, fs.ErrNotExist }, true},
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{"post-open stat", os.Stat, func(name string) (*os.File, error) {
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file, err := os.Open(name)
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if err == nil {
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err = file.Close()
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}
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return file, err
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}, false},
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} {
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t.Run(test.name, func(t *testing.T) {
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data, failure := readRegularFile(name, test.stat, test.open, 16)
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if data != nil || failure == nil || failure.kind != sourceReadIO || failure.missingTarget != test.missing {
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t.Fatalf("data = %v, failure = %#v", data, failure)
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}
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})
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}
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_, failure := readBoundedSource(missingDuringRead{}, 16)
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if failure == nil || failure.kind != sourceReadIO || failure.missingTarget {
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t.Fatalf("late read failure = %#v", failure)
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}
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}
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type missingDuringRead struct{}
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func (missingDuringRead) Read([]byte) (int, error) { return 0, fs.ErrNotExist }
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