tests/pkg_nanopb: initial commit

tests/pkg_nanopb/Makefile

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+include ../Makefile.tests_common
+
+USEPKG += nanopb
+
+# CI doesn't have the generator plugin installed,
+# so disable CI testing for now.
+#TEST_ON_CI_WHITELIST += all
+
+include $(RIOTBASE)/Makefile.include

tests/pkg_nanopb/README.md

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+# Introduction
+
+This is a test application for the nanoPb library.
+The library provides a Google Protocol Buffers encoder / decoder.
+
+# Prerequisites
+
+Install the protobuf compiler and the protobuf python bindings.
+On Debian/ubuntu, the corresponding packages are `protobuf-compiler` and
+`python-protobuf`. On Arch, it is `protobuf` and `python-protobuf`.

tests/pkg_nanopb/main.c

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+/*
+ * Copyright (c) 2011 Petteri Aimonen <jpa at nanopb.mail.kapsi.fi>
+ *
+ * This software is provided 'as-is', without any express or
+ * implied warranty. In no event will the authors be held liable
+ * for any damages arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any
+ * purpose, including commercial applications, and to alter it and
+ * redistribute it freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you
+ *    must not claim that you wrote the original software. If you use
+ *    this software in a product, an acknowledgment in the product
+ *    documentation would be appreciated but is not required.
+ *
+ * 2. Altered source versions must be plainly marked as such, and
+ *    must not be misrepresented as being the original software.
+ *
+ * 3. This notice may not be removed or altered from any source
+ * distribution.
+ *
+ * This file has been taken from
+ * https://github.com/nanopb/nanopb/tree/master/examples/simple
+ * (commit 5866b34) and changed to integrate well with RIOT (and comply to
+ * RIOT's coding conventions).
+ *
+ *
+ */
+
+/**
+ * @ingroup     tests
+ * @{
+ *
+ * @file
+ * @brief       nanopb test application
+ *
+ * @author      Petteri Aimonen <jpa at nanopb.mail.kapsi.fi>
+ * @author      Kaspar Schleiser <kaspar@schleiser.de> (RIOT adaption)
+ *
+ * @}
+ */
+
+#include <stdio.h>
+#include <pb_encode.h>
+#include <pb_decode.h>
+#include "simple.pb.h"
+
+int main(void)
+{
+    /* This is the buffer where we will store our message. */
+    uint8_t buffer[128];
+    size_t message_length;
+    bool status;
+
+    /* Encode our message */
+    {
+        /* Allocate space on the stack to store the message data.
+         *
+         * Nanopb generates simple struct definitions for all the messages.
+         * - check out the contents of simple.pb.h!
+         * It is a good idea to always initialize your structures
+         * so that you do not have garbage data from RAM in there.
+         */
+        SimpleMessage message = SimpleMessage_init_zero;
+
+        /* Create a stream that will write to our buffer. */
+        pb_ostream_t stream = pb_ostream_from_buffer(buffer, sizeof(buffer));
+
+        /* Fill in the lucky number */
+        message.lucky_number = 13;
+
+        /* Now we are ready to encode the message! */
+        status = pb_encode(&stream, SimpleMessage_fields, &message);
+        message_length = stream.bytes_written;
+
+        /* Then just check for any errors.. */
+        if (!status)
+        {
+            printf("Encoding failed: %s\n", PB_GET_ERROR(&stream));
+            return 1;
+        }
+    }
+
+    /* Now we could transmit the message over network, store it in a file or
+     * wrap it to a pigeon's leg.
+     */
+
+    /* But because we are lazy, we will just decode it immediately. */
+
+    {
+        /* Allocate space for the decoded message. */
+        SimpleMessage message = SimpleMessage_init_zero;
+
+        /* Create a stream that reads from the buffer. */
+        pb_istream_t stream = pb_istream_from_buffer(buffer, message_length);
+
+        /* Now we are ready to decode the message. */
+        status = pb_decode(&stream, SimpleMessage_fields, &message);
+
+        /* Check for errors... */
+        if (!status)
+        {
+            printf("Decoding failed: %s\n", PB_GET_ERROR(&stream));
+            return 1;
+        }
+
+        /* Print the data contained in the message. */
+        printf("Your lucky number was %d!\n", (int)message.lucky_number);
+    }
+
+    return 0;
+}

tests/pkg_nanopb/simple.proto

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+// A very simple protocol definition, consisting of only
+// one message.
+
+syntax = "proto2";
+
+message SimpleMessage {
+    required int32 lucky_number = 1;
+}

tests/pkg_nanopb/tests/01-run.py

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+#!/usr/bin/env python3
+
+import sys
+from testrunner import run
+
+
+def testfunc(child):
+    child.expect_exact('Your lucky number was 13!')
+
+
+if __name__ == "__main__":
+    sys.exit(run(testfunc))