1 files changed, 54 insertions, 0 deletions
diff --git a/tests/extensions/encode_extensions.c b/tests/extensions/encode_extensions.c
new file mode 100644
index 0000000..0074582
--- /dev/null
+++ b/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;
+}
+