package fstest

import "github.com/tetratelabs/wazero/internal/fstest"

Package fstest defines filesystem test cases that help validate host functions implementing WASI and `GOOS=js GOARCH=wasm`. Tests are defined here to reduce duplication and drift.

Here's an example using this inside code that compiles to wasm.

if err := fstest.WriteTestFiles(tmpDir); err != nil {
	log.Panicln(err)
}
if err := fstest.TestFS(os.DirFS(tmpDir)); err != nil {
	log.Panicln(err)
}

Failures found here should result in new tests in the appropriate package, for example, sysfs or wasi_snapshot_preview1.

This package must have no dependencies. Otherwise, compiling this with TinyGo or `GOOS=js GOARCH=wasm` can become bloated or complicated.

Index ¶

• Variables
• func TestFS(testfs fs.FS) error
• func WriteTestFiles(tmpDir string) (err error)

Variables ¶

var FS = func() fstest.MapFS {
	testFS := make(fstest.MapFS, len(files))
	for _, nf := range files {
		testFS[nf.name] = nf.file
	}
	return testFS
}()

FS includes all test files.

Functions ¶

func TestFS ¶

func TestFS(testfs fs.FS) error

TestFS runs fstest.TestFS on the given input which is either FS or includes files written by WriteTestFiles.

func WriteTestFiles ¶

func WriteTestFiles(tmpDir string) (err error)

WriteTestFiles writes files defined in FS to the given directory. This is used for implementations like os.DirFS.

Source Files ¶

fstest.go times_notwindows.go