5 files changed, 150 insertions, 0 deletions
diff --git a/libs/nanopb/tests/extensions/SConscript b/libs/nanopb/tests/extensions/SConscript
new file mode 100644
index 00000000..a2c87428
--- /dev/null
+++ b/libs/nanopb/tests/extensions/SConscript
@@ -0,0 +1,16 @@
+# Test the support for extension fields.
+
+Import("env")
+
+# We use the files from the alltypes test case
+incpath = env.Clone()
+incpath.Append(PROTOCPATH = '$BUILD/alltypes')
+incpath.Append(CPPPATH = '$BUILD/alltypes')
+
+incpath.NanopbProto(["extensions", "extensions.options"])
+enc = incpath.Program(["encode_extensions.c", "extensions.pb.c", "$BUILD/alltypes/alltypes.pb$OBJSUFFIX", "$COMMON/pb_encode.o", "$COMMON/pb_common.o"])
+dec = incpath.Program(["decode_extensions.c", "extensions.pb.c", "$BUILD/alltypes/alltypes.pb$OBJSUFFIX", "$COMMON/pb_decode.o", "$COMMON/pb_common.o"])
+
+env.RunTest(enc)
+env.RunTest([dec, "encode_extensions.output"])
+
diff --git a/libs/nanopb/tests/extensions/decode_extensions.c b/libs/nanopb/tests/extensions/decode_extensions.c
new file mode 100644
index 00000000..e4374380
--- /dev/null
+++ b/libs/nanopb/tests/extensions/decode_extensions.c
@@ -0,0 +1,60 @@
+/* Test decoding of extension fields. */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <pb_decode.h>
+#include "alltypes.pb.h"
+#include "extensions.pb.h"
+#include "test_helpers.h"
+
+#define TEST(x) if (!(x)) { \
+    printf("Test " #x " failed.\n"); \
+    return 2; \
+    }
+
+int main(int argc, char **argv)
+{
+    uint8_t buffer[1024];
+    size_t count;
+    pb_istream_t stream;
+    
+    AllTypes alltypes = {0};
+    int32_t extensionfield1;
+    pb_extension_t ext1;
+    ExtensionMessage extensionfield2;
+    pb_extension_t ext2;
+    
+    /* Read the message data */
+    SET_BINARY_MODE(stdin);
+    count = fread(buffer, 1, sizeof(buffer), stdin);
+    stream = pb_istream_from_buffer(buffer, count);
+    
+    /* Add the extensions */
+    alltypes.extensions = &ext1;        
+
+    ext1.type = &AllTypes_extensionfield1;
+    ext1.dest = &extensionfield1;
+    ext1.next = &ext2;
+    
+    ext2.type = &ExtensionMessage_AllTypes_extensionfield2;
+    ext2.dest = &extensionfield2;
+    ext2.next = NULL;
+    
+    /* Decode the message */
+    if (!pb_decode(&stream, AllTypes_fields, &alltypes))
+    {
+        printf("Parsing failed: %s\n", PB_GET_ERROR(&stream));
+        return 1;
+    }
+
+    /* Check that the extensions decoded properly */
+    TEST(ext1.found)
+    TEST(extensionfield1 == 12345)
+    TEST(ext2.found)
+    TEST(strcmp(extensionfield2.test1, "test") == 0)
+    TEST(extensionfield2.test2 == 54321)
+    
+    return 0;
+}
+
diff --git a/libs/nanopb/tests/extensions/encode_extensions.c b/libs/nanopb/tests/extensions/encode_extensions.c
new file mode 100644
index 00000000..00745826
--- /dev/null
+++ b/libs/nanopb/tests/extensions/encode_extensions.c
@@ -0,0 +1,54 @@
+/* Tests extension fields.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pb_encode.h>
+#include "alltypes.pb.h"
+#include "extensions.pb.h"
+#include "test_helpers.h"
+
+int main(int argc, char **argv)
+{
+    uint8_t buffer[1024];
+    pb_ostream_t stream;
+
+    AllTypes alltypes = {0};
+    int32_t extensionfield1 = 12345;
+    pb_extension_t ext1;
+    ExtensionMessage extensionfield2 = {"test", 54321};
+    pb_extension_t ext2;
+
+    /* Set up the extensions */
+    alltypes.extensions = &ext1;
+
+    ext1.type = &AllTypes_extensionfield1;
+    ext1.dest = &extensionfield1;
+    ext1.next = &ext2;
+    
+    ext2.type = &ExtensionMessage_AllTypes_extensionfield2;
+    ext2.dest = &extensionfield2;
+    ext2.next = NULL;
+
+    /* Set up the output stream */
+    stream = pb_ostream_from_buffer(buffer, sizeof(buffer));
+    
+    /* Now encode the message and check if we succeeded. */
+    if (pb_encode(&stream, AllTypes_fields, &alltypes))
+    {
+        SET_BINARY_MODE(stdout);
+        fwrite(buffer, 1, stream.bytes_written, stdout);
+        return 0; /* Success */
+    }
+    else
+    {
+        fprintf(stderr, "Encoding failed: %s\n", PB_GET_ERROR(&stream));
+        return 1; /* Failure */
+    }
+    
+    /* Check that the field tags are properly generated */
+    (void)AllTypes_extensionfield1_tag;
+    (void)ExtensionMessage_AllTypes_extensionfield2_tag;
+}
+
diff --git a/libs/nanopb/tests/extensions/extensions.options b/libs/nanopb/tests/extensions/extensions.options
new file mode 100644
index 00000000..a5cd61dd
--- /dev/null
+++ b/libs/nanopb/tests/extensions/extensions.options
@@ -0,0 +1 @@
+* max_size:16
diff --git a/libs/nanopb/tests/extensions/extensions.proto b/libs/nanopb/tests/extensions/extensions.proto
new file mode 100644
index 00000000..fcd5b43b
--- /dev/null
+++ b/libs/nanopb/tests/extensions/extensions.proto
@@ -0,0 +1,19 @@
+syntax = "proto2";
+
+import 'alltypes.proto';
+
+extend AllTypes {
+    optional int32 AllTypes_extensionfield1 = 255 [default = 5];
+}
+
+message ExtensionMessage {
+    extend AllTypes {
+        optional ExtensionMessage AllTypes_extensionfield2 = 254;
+        // required ExtensionMessage AllTypes_extensionfield3 = 253; // No longer allowed by protobuf 3
+        repeated ExtensionMessage AllTypes_extensionfield4 = 252;
+    }
+    
+    required string test1 = 1;
+    required int32 test2 = 2;
+}
+