1 files changed, 98 insertions, 0 deletions
diff --git a/neozip/test/test_dict.cc b/neozip/test/test_dict.cc
new file mode 100644
index 0000000000..8a882d5770
--- /dev/null
+++ b/neozip/test/test_dict.cc
@@ -0,0 +1,98 @@
+/* test_dict.cc - Test deflate() and inflate() with preset dictionary */
+
+#include "zbuild.h"
+#ifdef ZLIB_COMPAT
+#  include "zlib.h"
+#else
+#  include "zlib-ng.h"
+#endif
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "test_shared.h"
+
+#include <gtest/gtest.h>
+
+/* Maximum dictionary size, according to inflateGetDictionary() description. */
+#define MAX_DICTIONARY_SIZE 32768
+
+static const char dictionary[] = "hello";
+
+TEST(dictionary, basic) {
+    PREFIX3(stream) c_stream, d_stream;
+    uint8_t compr[128], uncompr[128];
+    z_size_t compr_len = sizeof(compr), uncompr_len = sizeof(uncompr);
+    uint32_t dict_adler = 0;
+    uint8_t check_dict[MAX_DICTIONARY_SIZE];
+    uint32_t check_dict_len = 0;
+    int err;
+
+    memset(&c_stream, 0, sizeof(c_stream));
+    memset(&d_stream, 0, sizeof(d_stream));
+
+    err = PREFIX(deflateInit)(&c_stream, Z_BEST_COMPRESSION);
+    EXPECT_EQ(err, Z_OK);
+
+    err = PREFIX(deflateSetDictionary)(&c_stream,
+        (const unsigned char *)dictionary, (int)sizeof(dictionary));
+    EXPECT_EQ(err, Z_OK);
+
+    dict_adler = c_stream.adler;
+    c_stream.next_out = compr;
+    c_stream.avail_out = (uint32_t)compr_len;
+
+    c_stream.next_in = (z_const unsigned char *)hello;
+    c_stream.avail_in = (uint32_t)hello_len;
+
+    err = PREFIX(deflate)(&c_stream, Z_FINISH);
+    EXPECT_EQ(err, Z_STREAM_END);
+
+    err = PREFIX(deflateEnd)(&c_stream);
+    EXPECT_EQ(err, Z_OK);
+
+    compr_len = (z_size_t)c_stream.total_out;
+
+    strcpy((char*)uncompr, "garbage garbage garbage");
+
+    d_stream.next_in  = compr;
+    d_stream.avail_in = (unsigned int)compr_len;
+
+    err = PREFIX(inflateInit)(&d_stream);
+    EXPECT_EQ(err, Z_OK);
+
+    d_stream.next_out = uncompr;
+    d_stream.avail_out = (unsigned int)uncompr_len;
+
+    for (;;) {
+        err = PREFIX(inflate)(&d_stream, Z_NO_FLUSH);
+        if (err == Z_STREAM_END)
+            break;
+        if (err == Z_NEED_DICT) {
+            EXPECT_EQ(d_stream.adler, dict_adler);
+            err = PREFIX(inflateSetDictionary)(&d_stream, (const unsigned char*)dictionary,
+                (uint32_t)sizeof(dictionary));
+            EXPECT_EQ(d_stream.adler, dict_adler);
+        }
+        EXPECT_EQ(err, Z_OK);
+    }
+
+    err = PREFIX(inflateGetDictionary)(&d_stream, NULL, &check_dict_len);
+    EXPECT_EQ(err, Z_OK);
+#ifndef S390_DFLTCC_INFLATE
+    EXPECT_GE(check_dict_len, sizeof(dictionary));
+#endif
+
+    err = PREFIX(inflateGetDictionary)(&d_stream, check_dict, &check_dict_len);
+    EXPECT_EQ(err, Z_OK);
+#ifndef S390_DFLTCC_INFLATE
+    EXPECT_TRUE(memcmp(dictionary, check_dict, sizeof(dictionary)) == 0);
+#endif
+
+    err = PREFIX(inflateEnd)(&d_stream);
+    EXPECT_EQ(err, Z_OK);
+
+    EXPECT_TRUE(strncmp((char*)uncompr, hello, sizeof(hello)) == 0);
+}