798ff20f81
This removes WithWorkDirFS and any other attempts to resolve the current directory (".") in host functions. This is a reaction to reality of compilers who track this inside wasm (not via host functions). One nice side effect is substantially simpler internal implementation of file-systems.
This also allows experimental.WithFS to block file access via passing nil.
Signed-off-by: Adrian Cole <adrian@tetrate.io>
44 lines
1.1 KiB
Go
44 lines
1.1 KiB
Go
package experimental_test
|
|
|
|
import (
|
|
"context"
|
|
_ "embed"
|
|
"testing"
|
|
"testing/fstest"
|
|
|
|
"github.com/tetratelabs/wazero/experimental"
|
|
"github.com/tetratelabs/wazero/internal/sys"
|
|
"github.com/tetratelabs/wazero/internal/testing/require"
|
|
)
|
|
|
|
// This is a very basic integration of fs config. The main goal is to show how it is configured.
|
|
func TestWithFS(t *testing.T) {
|
|
fileName := "animals.txt"
|
|
mapfs := fstest.MapFS{fileName: &fstest.MapFile{Data: []byte(`animals`)}}
|
|
|
|
// Set context to one that has experimental fs config
|
|
ctx, closer := experimental.WithFS(context.Background(), mapfs)
|
|
defer closer.Close(ctx)
|
|
|
|
v := ctx.Value(sys.FSKey{})
|
|
require.NotNil(t, v)
|
|
fsCtx, ok := v.(*sys.FSContext)
|
|
require.True(t, ok)
|
|
|
|
entry, ok := fsCtx.OpenedFile(ctx, 3)
|
|
require.True(t, ok)
|
|
require.Equal(t, "/", entry.Path)
|
|
|
|
// Override to nil context, ex to block file access
|
|
ctx, closer = experimental.WithFS(ctx, nil)
|
|
defer closer.Close(ctx)
|
|
|
|
v = ctx.Value(sys.FSKey{})
|
|
require.NotNil(t, v)
|
|
fsCtx, ok = v.(*sys.FSContext)
|
|
require.True(t, ok)
|
|
|
|
_, ok = fsCtx.OpenedFile(ctx, 3)
|
|
require.False(t, ok)
|
|
}
|