4ca0858e57
This centralizes filestat logic by making our own `Stat_t` similar to `syscall.Stat_t`. This exposes utilities in the platform package and adds a new function `FS.Stat` which avoids having to use `fs.File` to get the same info. Doing so at the FS abstraction allows us to optimize how it is implemented internally using portable means (e.g. `os.StatFile`) or OS-specific means where necessary, e.g. in windows. This also ensures `platform.OpenFile` returns syscall.Errno and centralizes error checking with a new `require.EqualErrno` test. Signed-off-by: Adrian Cole <adrian@tetrate.io>
84 lines
1.8 KiB
Go
84 lines
1.8 KiB
Go
package platform
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import (
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"errors"
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"fmt"
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"io/fs"
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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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func TestUnwrapOSError(t *testing.T) {
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tests := []struct {
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name string
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input error
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expected syscall.Errno
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}{
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{
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name: "LinkError ErrInvalid",
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input: &os.LinkError{Err: fs.ErrInvalid},
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expected: syscall.EINVAL,
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},
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{
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name: "PathError ErrInvalid",
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input: &os.PathError{Err: fs.ErrInvalid},
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expected: syscall.EINVAL,
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},
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{
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name: "SyscallError ErrInvalid",
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input: &os.SyscallError{Err: fs.ErrInvalid},
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expected: syscall.EINVAL,
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},
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{
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name: "PathError ErrPermission",
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input: &os.PathError{Err: os.ErrPermission},
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expected: syscall.EPERM,
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},
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{
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name: "PathError ErrExist",
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input: &os.PathError{Err: os.ErrExist},
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expected: syscall.EEXIST,
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},
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{
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name: "PathError syscall.ErrnotExist",
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input: &os.PathError{Err: os.ErrNotExist},
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expected: syscall.ENOENT,
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},
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{
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name: "PathError ErrClosed",
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input: &os.PathError{Err: os.ErrClosed},
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expected: syscall.EBADF,
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},
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{
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name: "PathError unknown == syscall.EIO",
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input: &os.PathError{Err: errors.New("ice cream")},
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expected: syscall.EIO,
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},
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{
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name: "unknown == syscall.EIO",
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input: errors.New("ice cream"),
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expected: syscall.EIO,
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},
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{
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name: "very wrapped unknown == syscall.EIO",
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input: fmt.Errorf("%w", fmt.Errorf("%w", fmt.Errorf("%w", errors.New("ice cream")))),
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expected: syscall.EIO,
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},
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}
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for _, tt := range tests {
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tc := tt
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t.Run(tc.name, func(t *testing.T) {
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errno := UnwrapOSError(tc.input)
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require.EqualErrno(t, tc.expected, errno)
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})
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}
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t.Run("nil", func(t *testing.T) {
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require.Nil(t, UnwrapOSError(nil))
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})
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}
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