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Package fstest

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

Overview ▾

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, gojs, 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.

Variables

FS includes all test files. 

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

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.