1 files changed, 131 insertions, 0 deletions
diff --git a/test/test_digest.c b/test/test_digest.c
new file mode 100644
index 0000000..7e7e77a
--- /dev/null
+++ b/test/test_digest.c
@@ -0,0 +1,131 @@
+// Copyright 2020-2021 David Robillard <d@drobilla.net>
+// SPDX-License-Identifier: ISC
+
+#undef NDEBUG
+
+#include "zix/attributes.h"
+#include "zix/digest.h"
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdint.h>
+
+// Just basic smoke tests to ensure the hash functions are reacting to data
+
+static void
+test_digest(void)
+{
+  static const uint8_t data[] = {
+    1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
+
+  size_t last = 0U;
+
+  for (size_t offset = 0; offset < 7; ++offset) {
+    const size_t len = 8U - offset;
+    for (size_t i = offset; i < 8; ++i) {
+      const size_t h = zix_digest(0U, &data[i], len);
+      assert(h != last);
+      last = h;
+    }
+  }
+}
+
+static void
+test_digest32(void)
+{
+  static const uint8_t data[] = {1, 2, 3, 4, 5, 6, 7, 8};
+
+  uint32_t last = 0U;
+
+  for (size_t offset = 0; offset < 3; ++offset) {
+    for (size_t i = offset; i < 4; ++i) {
+      const uint32_t h = zix_digest32(0U, &data[i], 4);
+      assert(h != last);
+      last = h;
+    }
+  }
+}
+
+static void
+test_digest64(void)
+{
+  static const uint8_t data[] = {
+    1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
+
+  uint64_t last = 0U;
+
+  for (size_t offset = 0; offset < 7; ++offset) {
+    for (size_t i = offset; i < 8; ++i) {
+      const uint64_t h = zix_digest64(0U, &data[i], 8);
+      assert(h != last);
+      last = h;
+    }
+  }
+}
+
+static void
+test_digest32_aligned(void)
+{
+  static const uint32_t data[] = {1, 2, 3, 4, 5, 6, 7, 8};
+
+  uint32_t last = 0U;
+
+  for (size_t offset = 0; offset < 3; ++offset) {
+    const size_t len = 4U - offset;
+    for (size_t i = offset; i < 4; ++i) {
+      const uint32_t h =
+        zix_digest32_aligned(0U, &data[i], len * sizeof(uint32_t));
+      assert(h != last);
+      last = h;
+    }
+  }
+}
+
+static void
+test_digest64_aligned(void)
+{
+  static const uint64_t data[] = {1, 2, 3, 4, 5, 6, 7, 8};
+
+  uint64_t last = 0U;
+
+  for (size_t offset = 0; offset < 3; ++offset) {
+    const size_t len = 4U - offset;
+    for (size_t i = offset; i < 4; ++i) {
+      const uint64_t h =
+        zix_digest64_aligned(0U, &data[i], len * sizeof(uint64_t));
+      assert(h != last);
+      last = h;
+    }
+  }
+}
+
+static void
+test_digest_aligned(void)
+{
+  static const size_t data[] = {1, 2, 3, 4, 5, 6, 7, 8};
+
+  size_t last = 0U;
+
+  for (size_t offset = 0; offset < 3; ++offset) {
+    const size_t len = 4U - offset;
+    for (size_t i = offset; i < 4; ++i) {
+      const size_t h = zix_digest_aligned(0U, &data[i], len * sizeof(size_t));
+      assert(h != last);
+      last = h;
+    }
+  }
+}
+
+ZIX_PURE_FUNC int
+main(void)
+{
+  test_digest32();
+  test_digest64();
+  test_digest();
+
+  test_digest32_aligned();
+  test_digest64_aligned();
+  test_digest_aligned();
+
+  return 0;
+}