1 files changed, 100 insertions, 0 deletions
diff --git a/subprojects/exess/test/test_ubyte.c b/subprojects/exess/test/test_ubyte.c
new file mode 100644
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+++ b/subprojects/exess/test/test_ubyte.c
@@ -0,0 +1,100 @@
+/*
+  Copyright 2011-2021 David Robillard <d@drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#undef NDEBUG
+
+#include "exess/exess.h"
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+static void
+check_read(const char* const string,
+           const ExessStatus expected_status,
+           const uint8_t     expected_value,
+           const size_t      expected_count)
+{
+  uint8_t value = 0;
+
+  const ExessResult r = exess_read_ubyte(&value, string);
+  assert(r.status == expected_status);
+  assert(r.count == expected_count);
+  assert(value == expected_value);
+}
+
+static void
+test_read_ubyte(void)
+{
+  // Limits
+  check_read("0", EXESS_SUCCESS, 0, 1);
+  check_read("255", EXESS_SUCCESS, UINT8_MAX, EXESS_MAX_UBYTE_LENGTH);
+
+  // Out of range
+  check_read("256", EXESS_OUT_OF_RANGE, 0, 3);
+
+  // Garbage
+  check_read("-1", EXESS_EXPECTED_DIGIT, 0, 0);
+  check_read("+", EXESS_EXPECTED_DIGIT, 0, 0);
+}
+
+static void
+check_write(const uint8_t     value,
+            const ExessStatus expected_status,
+            const size_t      buf_size,
+            const char* const expected_string)
+{
+  char buf[EXESS_MAX_UBYTE_LENGTH + 1] = {1, 2, 3, 4};
+
+  assert(buf_size <= sizeof(buf));
+
+  const ExessResult r = exess_write_ubyte(value, buf_size, buf);
+  assert(r.status == expected_status);
+  assert(r.count == strlen(buf));
+  assert(!strcmp(buf, expected_string));
+  assert(r.status || exess_write_ubyte(value, 0, NULL).count == r.count);
+}
+
+static void
+test_write_ubyte(void)
+{
+  check_write(0, EXESS_SUCCESS, 2, "0");
+  check_write(UINT8_MAX, EXESS_SUCCESS, 4, "255");
+}
+
+static void
+test_round_trip(void)
+{
+  uint8_t value                           = 0;
+  char    buf[EXESS_MAX_UBYTE_LENGTH + 1] = {1, 2, 3, 4};
+
+  for (uint16_t i = 0; i <= UINT8_MAX; ++i) {
+    assert(!exess_write_ubyte((uint8_t)i, sizeof(buf), buf).status);
+    assert(!exess_read_ubyte(&value, buf).status);
+    assert(value == i);
+  }
+}
+
+int
+main(void)
+{
+  test_read_ubyte();
+  test_write_ubyte();
+  test_round_trip();
+
+  return 0;
+}