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package main
// This file tests the compiler by running Go files in testdata/*.go and
// comparing their output with the expected output in testdata/*.txt.
import (
"bufio"
"bytes"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"runtime"
"sort"
"sync"
"testing"
"github.com/tinygo-org/tinygo/compileopts"
"github.com/tinygo-org/tinygo/loader"
)
const TESTDATA = "testdata"
func TestCompiler(t *testing.T) {
matches, err := filepath.Glob(filepath.Join(TESTDATA, "*.go"))
if err != nil {
t.Fatal("could not read test files:", err)
}
dirMatches, err := filepath.Glob(filepath.Join(TESTDATA, "*", "main.go"))
if err != nil {
t.Fatal("could not read test packages:", err)
}
if len(matches) == 0 || len(dirMatches) == 0 {
t.Fatal("no test files found")
}
for _, m := range dirMatches {
matches = append(matches, filepath.Dir(m)+string(filepath.Separator))
}
sort.Strings(matches)
if runtime.GOOS != "windows" {
t.Run("Host", func(t *testing.T) {
runPlatTests("", matches, t)
})
}
if testing.Short() {
return
}
t.Run("EmulatedCortexM3", func(t *testing.T) {
runPlatTests("cortex-m-qemu", matches, t)
})
if runtime.GOOS == "linux" {
t.Run("ARMLinux", func(t *testing.T) {
runPlatTests("arm--linux-gnueabihf", matches, t)
})
t.Run("ARM64Linux", func(t *testing.T) {
runPlatTests("aarch64--linux-gnu", matches, t)
})
t.Run("WebAssembly", func(t *testing.T) {
runPlatTests("wasm", matches, t)
})
}
}
func runPlatTests(target string, matches []string, t *testing.T) {
t.Parallel()
for _, path := range matches {
switch {
case target == "wasm":
// testdata/gc.go is known not to work on WebAssembly
if path == filepath.Join("testdata", "gc.go") {
continue
}
case target == "":
// run all tests on host
case target == "cortex-m-qemu":
// all tests are supported
default:
// cross-compilation of cgo is not yet supported
if path == filepath.Join("testdata", "cgo")+string(filepath.Separator) {
continue
}
}
t.Run(filepath.Base(path), func(t *testing.T) {
t.Parallel()
runTest(path, target, t)
})
}
}
// Due to some problems with LLD, we cannot run links in parallel, or in parallel with compiles.
// Therefore, we put a lock around builds and run everything else in parallel.
var buildLock sync.Mutex
// runBuild is a thread-safe wrapper around Build.
func runBuild(src, out string, opts *compileopts.Options) error {
buildLock.Lock()
defer buildLock.Unlock()
return Build(src, out, opts)
}
func runTest(path, target string, t *testing.T) {
// Get the expected output for this test.
txtpath := path[:len(path)-3] + ".txt"
if path[len(path)-1] == os.PathSeparator {
txtpath = path + "out.txt"
}
expected, err := ioutil.ReadFile(txtpath)
if err != nil {
t.Fatal("could not read expected output file:", err)
}
// Create a temporary directory for test output files.
tmpdir, err := ioutil.TempDir("", "tinygo-test")
if err != nil {
t.Fatal("could not create temporary directory:", err)
}
defer func() {
rerr := os.RemoveAll(tmpdir)
if rerr != nil {
t.Errorf("failed to remove temporary directory %q: %s", tmpdir, rerr.Error())
}
}()
// Build the test binary.
config := &compileopts.Options{
Target: target,
Opt: "z",
PrintIR: false,
DumpSSA: false,
VerifyIR: true,
Debug: false,
PrintSizes: "",
WasmAbi: "js",
}
binary := filepath.Join(tmpdir, "test")
err = runBuild("./"+path, binary, config)
if err != nil {
if errLoader, ok := err.(loader.Errors); ok {
for _, err := range errLoader.Errs {
t.Log("failed to build:", err)
}
} else {
t.Log("failed to build:", err)
}
t.Fail()
return
}
// Run the test.
var cmd *exec.Cmd
if target == "" {
cmd = exec.Command(binary)
} else {
spec, err := compileopts.LoadTarget(target)
if err != nil {
t.Fatal("failed to load target spec:", err)
}
if len(spec.Emulator) == 0 {
t.Fatal("no emulator available for target:", target)
}
args := append(spec.Emulator[1:], binary)
cmd = exec.Command(spec.Emulator[0], args...)
}
stdout := &bytes.Buffer{}
cmd.Stdout = stdout
if target != "" {
cmd.Stderr = os.Stderr
}
err = cmd.Run()
if _, ok := err.(*exec.ExitError); ok && target != "" {
err = nil // workaround for QEMU
}
// putchar() prints CRLF, convert it to LF.
actual := bytes.Replace(stdout.Bytes(), []byte{'\r', '\n'}, []byte{'\n'}, -1)
expected = bytes.Replace(expected, []byte{'\r', '\n'}, []byte{'\n'}, -1) // for Windows
// Check whether the command ran successfully.
fail := false
if err != nil {
t.Log("failed to run:", err)
fail = true
} else if !bytes.Equal(expected, actual) {
t.Log("output did not match")
fail = true
}
if fail {
r := bufio.NewReader(bytes.NewReader(actual))
for {
line, err := r.ReadString('\n')
if err != nil {
break
}
t.Log("stdout:", line[:len(line)-1])
}
t.Fail()
}
}
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