Unit testing for def/ module.

Added unit tests to test code in def/ module.

vendor/github.com/mattn/go-isatty/go.mod

@@ -0,0 +1,3 @@
+module github.com/mattn/go-isatty
+
+require golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a

vendor/github.com/mattn/go-isatty/go.sum

@@ -0,0 +1,2 @@
+golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a h1:aYOabOQFp6Vj6W1F80affTUvO9UxmJRx8K0gsfABByQ=
+golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

vendor/github.com/mattn/go-isatty/isatty_android.go

@@ -1,5 +1,4 @@
-// +build linux
-// +build !appengine,!ppc64,!ppc64le
+// +build android
 
 package isatty
 
@@ -16,3 +15,9 @@ func IsTerminal(fd uintptr) bool {
 	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd, ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
 	return err == 0
 }
+
+// IsCygwinTerminal return true if the file descriptor is a cygwin or msys2
+// terminal. This is also always false on this environment.
+func IsCygwinTerminal(fd uintptr) bool {
+	return false
+}

vendor/github.com/mattn/go-isatty/isatty_appengine.go

@@ -1,15 +0,0 @@
-// +build appengine
-
-package isatty
-
-// IsTerminal returns true if the file descriptor is terminal which
-// is always false on on appengine classic which is a sandboxed PaaS.
-func IsTerminal(fd uintptr) bool {
-	return false
-}
-
-// IsCygwinTerminal() return true if the file descriptor is a cygwin or msys2
-// terminal. This is also always false on this environment.
-func IsCygwinTerminal(fd uintptr) bool {
-	return false
-}

vendor/github.com/mattn/go-isatty/isatty_bsd.go

@@ -16,3 +16,9 @@ func IsTerminal(fd uintptr) bool {
 	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd, ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
 	return err == 0
 }
+
+// IsCygwinTerminal return true if the file descriptor is a cygwin or msys2
+// terminal. This is also always false on this environment.
+func IsCygwinTerminal(fd uintptr) bool {
+	return false
+}

vendor/github.com/mattn/go-isatty/isatty_linux_ppc64x.go

@@ -1,19 +0,0 @@
-// +build linux
-// +build ppc64 ppc64le
-
-package isatty
-
-import (
-	"unsafe"
-
-	syscall "golang.org/x/sys/unix"
-)
-
-const ioctlReadTermios = syscall.TCGETS
-
-// IsTerminal return true if the file descriptor is terminal.
-func IsTerminal(fd uintptr) bool {
-	var termios syscall.Termios
-	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd, ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
-	return err == 0
-}

vendor/github.com/mattn/go-isatty/isatty_others.go

@@ -1,9 +1,14 @@
-// +build !windows
-// +build !appengine
+// +build appengine js nacl
 
 package isatty
 
-// IsCygwinTerminal return true if the file descriptor is a cygwin or msys2
+// IsTerminal returns true if the file descriptor is terminal which
+// is always false on js and appengine classic which is a sandboxed PaaS.
+func IsTerminal(fd uintptr) bool {
+	return false
+}
+
+// IsCygwinTerminal() return true if the file descriptor is a cygwin or msys2
 // terminal. This is also always false on this environment.
 func IsCygwinTerminal(fd uintptr) bool {
 	return false

vendor/github.com/mattn/go-isatty/isatty_solaris.go

@@ -14,3 +14,9 @@ func IsTerminal(fd uintptr) bool {
 	err := unix.IoctlSetTermio(int(fd), unix.TCGETA, &termio)
 	return err == nil
 }
+
+// IsCygwinTerminal return true if the file descriptor is a cygwin or msys2
+// terminal. This is also always false on this environment.
+func IsCygwinTerminal(fd uintptr) bool {
+	return false
+}

vendor/github.com/mattn/go-isatty/isatty_tcgets.go

@@ -0,0 +1,19 @@
+// +build linux aix
+// +build !appengine
+// +build !android
+
+package isatty
+
+import "golang.org/x/sys/unix"
+
+// IsTerminal return true if the file descriptor is terminal.
+func IsTerminal(fd uintptr) bool {
+	_, err := unix.IoctlGetTermios(int(fd), unix.TCGETS)
+	return err == nil
+}
+
+// IsCygwinTerminal return true if the file descriptor is a cygwin or msys2
+// terminal. This is also always false on this environment.
+func IsCygwinTerminal(fd uintptr) bool {
+	return false
+}