change all tests to call functions instead of binary directly

I had to temporarely hack github.com/mvdan/sh to fix dir handling

cmd/task/task.go

@@ -53,7 +53,11 @@ hello:
 	}
 
 	if init {
-		if err := task.InitTaskfile(); err != nil {
+		wd, err := os.Getwd()
+		if err != nil {
+			log.Fatal(err)
+		}
+		if err := task.InitTaskfile(wd); err != nil {
 			log.Fatal(err)
 		}
 		return

init.go

@@ -4,6 +4,7 @@ import (
 	"io/ioutil"
 	"log"
 	"os"
+	"path/filepath"
 )
 
 const defaultTaskfile = `# github.com/go-task/task
@@ -14,14 +15,16 @@ default:
 `
 
 // InitTaskfile Taskfile creates a new Taskfile
-func InitTaskfile() error {
+func InitTaskfile(path string) error {
 	for _, f := range []string{"Taskfile.yml", "Taskfile.toml", "Taskfile.json"} {
+		f = filepath.Join(path, f)
 		if _, err := os.Stat(f); err == nil {
 			return ErrTaskfileAlreadyExists
 		}
 	}
 
-	if err := ioutil.WriteFile("Taskfile.yml", []byte(defaultTaskfile), 0666); err != nil {
+	f := filepath.Join(path, "Taskfile.yml")
+	if err := ioutil.WriteFile(f, []byte(defaultTaskfile), 0666); err != nil {
 		return err
 	}
 	log.Printf("Taskfile.yml created in the current directory")

task_test.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"io/ioutil"
 	"os"
-	"os/exec"
 	"path/filepath"
 	"strings"
 	"testing"
@@ -37,7 +36,9 @@ func TestDeps(t *testing.T) {
 	}
 
 	e := &task.Executor{
-		Dir: dir,
+		Dir:    dir,
+		Stdout: ioutil.Discard,
+		Stderr: ioutil.Discard,
 	}
 	assert.NoError(t, e.ReadTaskfile())
 	assert.NoError(t, e.Run("default"))
@@ -69,7 +70,9 @@ func TestVars(t *testing.T) {
 	}
 
 	e := &task.Executor{
-		Dir: dir,
+		Dir:    dir,
+		Stdout: ioutil.Discard,
+		Stderr: ioutil.Discard,
 	}
 	assert.NoError(t, e.ReadTaskfile())
 	assert.NoError(t, e.Run("default"))
@@ -101,7 +104,9 @@ func TestTaskCall(t *testing.T) {
 	}
 
 	e := &task.Executor{
-		Dir: dir,
+		Dir:    dir,
+		Stdout: ioutil.Discard,
+		Stderr: ioutil.Discard,
 	}
 	assert.NoError(t, e.ReadTaskfile())
 	assert.NoError(t, e.Run("default"))
@@ -122,23 +127,23 @@ func TestStatus(t *testing.T) {
 	if _, err := os.Stat(file); err == nil {
 		t.Errorf("File should not exists: %v", err)
 	}
-	c := exec.Command("task", "gen-foo")
-	c.Dir = dir
-	if err := c.Run(); err != nil {
-		t.Error(err)
+
+	e := &task.Executor{
+		Dir:    dir,
+		Stdout: ioutil.Discard,
+		Stderr: ioutil.Discard,
 	}
+	assert.NoError(t, e.ReadTaskfile())
+	assert.NoError(t, e.Run("gen-foo"))
+
 	if _, err := os.Stat(file); err != nil {
 		t.Errorf("File should exists: %v", err)
 	}
 
 	buff := bytes.NewBuffer(nil)
-	c = exec.Command("task", "gen-foo")
-	c.Dir = dir
-	c.Stderr = buff
-	c.Stdout = buff
-	if err := c.Run(); err != nil {
-		t.Error(err)
-	}
+	e.Stdout, e.Stderr = buff, buff
+	assert.NoError(t, e.Run("gen-foo"))
+
 	if buff.String() != `task: Task "gen-foo" is up to date`+"\n" {
 		t.Errorf("Wrong output message: %s", buff.String())
 	}
@@ -153,11 +158,10 @@ func TestInit(t *testing.T) {
 		t.Errorf("Taskfile.yml should not exists")
 	}
 
-	c := exec.Command("task", "--init")
-	c.Dir = dir
-	if err := c.Run(); err != nil {
+	if err := task.InitTaskfile(dir); err != nil {
 		t.Error(err)
 	}
+
 	if _, err := os.Stat(file); err != nil {
 		t.Errorf("Taskfile.yml should exists")
 	}

vendor/github.com/mvdan/sh/interp/test.go

@@ -58,19 +58,19 @@ func (r *Runner) binTest(op syntax.BinTestOperator, x, y string) bool {
 		}
 		return re.MatchString(x)
 	case syntax.TsNewer:
-		i1, i2 := stat(x), stat(y)
+		i1, i2 := stat(r.Dir, x), stat(r.Dir, y)
 		if i1 == nil || i2 == nil {
 			return false
 		}
 		return i1.ModTime().After(i2.ModTime())
 	case syntax.TsOlder:
-		i1, i2 := stat(x), stat(y)
+		i1, i2 := stat(r.Dir, x), stat(r.Dir, y)
 		if i1 == nil || i2 == nil {
 			return false
 		}
 		return i1.ModTime().Before(i2.ModTime())
 	case syntax.TsDevIno:
-		i1, i2 := stat(x), stat(y)
+		i1, i2 := stat(r.Dir, x), stat(r.Dir, y)
 		return os.SameFile(i1, i2)
 	case syntax.TsEql:
 		return atoi(x) == atoi(y)
@@ -95,40 +95,40 @@ func (r *Runner) binTest(op syntax.BinTestOperator, x, y string) bool {
 	}
 }
 
-func stat(name string) os.FileInfo {
-	info, _ := os.Stat(name)
+func stat(dir, name string) os.FileInfo {
+	info, _ := os.Stat(filepath.Join(dir, name))
 	return info
 }
 
-func statMode(name string, mode os.FileMode) bool {
-	info := stat(name)
+func statMode(dir, name string, mode os.FileMode) bool {
+	info := stat(dir, name)
 	return info != nil && info.Mode()&mode != 0
 }
 
 func (r *Runner) unTest(op syntax.UnTestOperator, x string) bool {
 	switch op {
 	case syntax.TsExists:
-		return stat(x) != nil
+		return stat(r.Dir, x) != nil
 	case syntax.TsRegFile:
-		info := stat(x)
+		info := stat(r.Dir, x)
 		return info != nil && info.Mode().IsRegular()
 	case syntax.TsDirect:
-		return statMode(x, os.ModeDir)
+		return statMode(r.Dir, x, os.ModeDir)
 	//case syntax.TsCharSp:
 	//case syntax.TsBlckSp:
 	case syntax.TsNmPipe:
-		return statMode(x, os.ModeNamedPipe)
+		return statMode(r.Dir, x, os.ModeNamedPipe)
 	case syntax.TsSocket:
-		return statMode(x, os.ModeSocket)
+		return statMode(r.Dir, x, os.ModeSocket)
 	case syntax.TsSmbLink:
 		info, _ := os.Lstat(x)
 		return info != nil && info.Mode()&os.ModeSymlink != 0
 	case syntax.TsSticky:
-		return statMode(x, os.ModeSticky)
+		return statMode(r.Dir, x, os.ModeSticky)
 	case syntax.TsUIDSet:
-		return statMode(x, os.ModeSetuid)
+		return statMode(r.Dir, x, os.ModeSetuid)
 	case syntax.TsGIDSet:
-		return statMode(x, os.ModeSetgid)
+		return statMode(r.Dir, x, os.ModeSetgid)
 	//case syntax.TsGrpOwn:
 	//case syntax.TsUsrOwn:
 	//case syntax.TsModif:
@@ -149,7 +149,7 @@ func (r *Runner) unTest(op syntax.UnTestOperator, x string) bool {
 		_, err := exec.LookPath(filepath.Join(r.Dir, x))
 		return err == nil
 	case syntax.TsNoEmpty:
-		info := stat(x)
+		info := stat(r.Dir, x)
 		return info != nil && info.Size() > 0
 	//case syntax.TsFdTerm:
 	case syntax.TsEmpStr: