fn: support for functions testing (#379)

* fn: add test framework

* fn: make routes creation smarter

* fn: add testframework examples

* fn: remove unnecessary dependency

* fn: update doc

* fn: fix consistenty between runff, runlocaltest and runremotetest

fn/run_windows.go

@@ -0,0 +1,25 @@
+// +build windows
+
+package main
+
+import (
+	"io"
+	"os"
+	"strings"
+	"syscall"
+	"unsafe"
+)
+
+func getStdin() io.Reader {
+	var stdin io.Reader = os.Stdin
+	if isTerminal(int(os.Stdin.Fd())) {
+		stdin = strings.NewReader("")
+	}
+	return stdin
+}
+
+func isTerminal(fd int) bool {
+	var st uint32
+	r, _, e := syscall.Syscall(procGetConsoleMode.Addr(), 2, uintptr(fd), uintptr(unsafe.Pointer(&st)), 0)
+	return r != 0 && e == 0
+}