[TEST] add test case for updating dynamic table capacity to a smaller…

… value.

test/CMakeLists.txt

@@ -19,6 +19,7 @@ lsqpack_add_test(huff_dec)
 lsqpack_add_test(read_enc_stream)
 lsqpack_add_test(qpack)
 lsqpack_add_test(circ_list)
+lsqpack_add_test(dyn_table_cap_mismatch)
 
 if(MSVC)
     message(WARNING "Scenario tests are disabled on Windows (TODO)")

test/test_dyn_table_cap_mismatch.c

@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "lsqpack.h"
+#include "lsxpack_header.h"
+
+static void _decoderUnblocked(void *context) {
+}
+
+static struct lsxpack_header *_decoderPrepareDecode(void *context, struct lsxpack_header *header, size_t space)
+{
+    static struct lsxpack_header xpackHeader;
+    char *xpackHeaderBuffer = (char *)malloc(space);
+    lsxpack_header_prepare_decode(&xpackHeader, xpackHeaderBuffer, 0, space);
+    return &xpackHeader;
+}
+
+static int _decoderProcessHeader(void *context, struct lsxpack_header *header)
+{
+    printf("Decode header %.*s: %.*s\n", header->name_len, &header->buf[header->name_offset], header->val_len, &header->buf[header->val_offset]);
+    return 0;
+}
+
+int main(int argc, const char * argv[]) {
+    struct lsqpack_dec qpackDecoder;
+
+    struct lsqpack_dec_hset_if callbacks = {
+        .dhi_unblocked = _decoderUnblocked,
+        .dhi_prepare_decode = _decoderPrepareDecode,
+        .dhi_process_header = _decoderProcessHeader,
+    };
+    lsqpack_dec_init(&qpackDecoder, stderr, 16384, 100, &callbacks, (enum lsqpack_dec_opts)0);
+
+    FILE *encoder_stream = fopen("testdata/encoder_stream", "r");
+    uint8_t buffer[16384];
+    size_t size = 0;
+    while ((size = fread(buffer, 1, sizeof(buffer), encoder_stream)) > 0) {
+        lsqpack_dec_enc_in(&qpackDecoder, buffer, size);
+    }
+    fclose(encoder_stream);
+
+    FILE *response = fopen("testdata/response", "r");
+    size = fread(buffer, 1, sizeof(buffer), response);
+    uint8_t decoderBuffer[LSQPACK_LONGEST_HEADER_ACK];
+    size_t decoderBufferSize = sizeof(decoderBuffer);
+    const uint8_t *bufferRef = buffer;
+    enum lsqpack_read_header_status status = lsqpack_dec_header_in(&qpackDecoder, NULL, 2092, size, &bufferRef, size, decoderBuffer, &decoderBufferSize);
+    printf("Decode status %d\n", status);
+    fclose(response);
+
+    return 0;
+}

test/testdata/response

@@ -0,0 +1,2 @@
+
+����