1 files changed, 69 insertions, 0 deletions
diff --git a/neozip/test/test_small_buffers.cc b/neozip/test/test_small_buffers.cc
new file mode 100644
index 0000000000..bb3449fd88
--- /dev/null
+++ b/neozip/test/test_small_buffers.cc
@@ -0,0 +1,69 @@
+/* test_small_buffers.cc - Test deflate() and inflate() with small buffers */
+
+#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>
+
+TEST(deflate, small_buffers) {
+    PREFIX3(stream) c_stream, d_stream;
+    uint8_t compr[128], uncompr[128];
+    z_size_t compr_len = sizeof(compr), uncompr_len = sizeof(uncompr);
+    int err;
+
+    memset(&c_stream, 0, sizeof(c_stream));
+    memset(&d_stream, 0, sizeof(d_stream));
+
+    err = PREFIX(deflateInit)(&c_stream, Z_DEFAULT_COMPRESSION);
+    EXPECT_EQ(err, Z_OK);
+
+    c_stream.next_in  = (z_const unsigned char *)hello;
+    c_stream.next_out = compr;
+
+    while (c_stream.total_in != hello_len && c_stream.total_out < compr_len) {
+        c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */
+        err = PREFIX(deflate)(&c_stream, Z_NO_FLUSH);
+        EXPECT_EQ(err, Z_OK);
+    }
+    /* Finish the stream, still forcing small buffers */
+    for (;;) {
+        c_stream.avail_out = 1;
+        err = PREFIX(deflate)(&c_stream, Z_FINISH);
+        if (err == Z_STREAM_END) break;
+        EXPECT_EQ(err, Z_OK);
+    }
+
+    err = PREFIX(deflateEnd)(&c_stream);
+    EXPECT_EQ(err, Z_OK);
+
+    strcpy((char*)uncompr, "garbage");
+
+    d_stream.next_in  = compr;
+    d_stream.next_out = uncompr;
+
+    err = PREFIX(inflateInit)(&d_stream);
+    EXPECT_EQ(err, Z_OK);
+
+    while (d_stream.total_out < uncompr_len && d_stream.total_in < compr_len) {
+        d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */
+        err = PREFIX(inflate)(&d_stream, Z_NO_FLUSH);
+        if (err == Z_STREAM_END) break;
+        EXPECT_EQ(err, Z_OK);
+    }
+
+    err = PREFIX(inflateEnd)(&d_stream);
+    EXPECT_EQ(err, Z_OK);
+
+    EXPECT_STREQ((char*)uncompr, hello);
+}