36bf277534
This forces all syscall functions, notably filesystem, to return numeric codes as opposed to mapping in two different areas. The result of this change is better consolidation in call sites of `sysfs.FS`, while further refactoring is needed to address consolidation of file errors. Signed-off-by: Adrian Cole <adrian@tetrate.io>
45 lines
1.0 KiB
Go
45 lines
1.0 KiB
Go
package platform
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import (
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"bytes"
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"io"
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"os"
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"syscall"
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"testing"
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"github.com/tetratelabs/wazero/internal/testing/require"
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)
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// Test_Fdatasync doesn't guarantee sync works because the operating system may
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// sync anyway. There is no test in Go for syscall.Fdatasync, but closest is
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// similar to below. Effectively, this only tests that things don't error.
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func Test_Fdatasync(t *testing.T) {
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f, errno := os.CreateTemp("", t.Name())
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require.NoError(t, errno)
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defer f.Close()
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expected := "hello world!"
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// Write the expected data
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_, errno = f.Write([]byte(expected))
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require.NoError(t, errno)
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// Sync the data.
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if errno = Fdatasync(f); errno == syscall.ENOSYS {
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return // don't continue if it isn't supported.
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}
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require.Zero(t, errno)
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// Rewind while the file is still open.
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_, err := f.Seek(0, io.SeekStart)
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require.NoError(t, err)
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// Read data from the file
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var buf bytes.Buffer
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_, errno = io.Copy(&buf, f)
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require.NoError(t, errno)
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// It may be the case that sync worked.
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require.Equal(t, expected, buf.String())
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}
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