Adding upstream version 0.0~git20250520.a1d9079+dfsg.

Signed-off-by: Daniel Baumann <daniel@debian.org>

app/internal/apptest/apptest.go

@@ -0,0 +1,67 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package apptest provides utilities for testing an app.
+//
+// It is extremely incomplete, hence it being internal.
+// For starters, it should support iOS.
+package apptest
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"net"
+)
+
+// Port is the TCP port used to communicate with the test app.
+//
+// TODO(crawshaw): find a way to make this configurable. adb am extras?
+const Port = "12533"
+
+// Comm is a simple text-based communication protocol.
+//
+// Assumes all sides are friendly and cooperative and that the
+// communication is over at the first sign of trouble.
+type Comm struct {
+	Conn   net.Conn
+	Fatalf func(format string, args ...interface{})
+	Printf func(format string, args ...interface{})
+
+	scanner *bufio.Scanner
+}
+
+func (c *Comm) Send(cmd string, args ...interface{}) {
+	buf := new(bytes.Buffer)
+	buf.WriteString(cmd)
+	for _, arg := range args {
+		buf.WriteRune(' ')
+		fmt.Fprintf(buf, "%v", arg)
+	}
+	buf.WriteRune('\n')
+	b := buf.Bytes()
+	c.Printf("comm.send: %s\n", b)
+	if _, err := c.Conn.Write(b); err != nil {
+		c.Fatalf("failed to send %s: %v", b, err)
+	}
+}
+
+func (c *Comm) Recv(cmd string, a ...interface{}) {
+	if c.scanner == nil {
+		c.scanner = bufio.NewScanner(c.Conn)
+	}
+	if !c.scanner.Scan() {
+		c.Fatalf("failed to recv %q: %v", cmd, c.scanner.Err())
+	}
+	text := c.scanner.Text()
+	c.Printf("comm.recv: %s\n", text)
+	var recvCmd string
+	args := append([]interface{}{&recvCmd}, a...)
+	if _, err := fmt.Sscan(text, args...); err != nil {
+		c.Fatalf("cannot scan recv command %s: %q: %v", cmd, text, err)
+	}
+	if cmd != recvCmd {
+		c.Fatalf("expecting recv %q, got %v", cmd, text)
+	}
+}