1 files changed, 98 insertions, 0 deletions
diff --git a/subprojects/exess/test/test_byte.c b/subprojects/exess/test/test_byte.c
new file mode 100644
index 00000000..a67fd779
--- /dev/null
+++ b/subprojects/exess/test/test_byte.c
@@ -0,0 +1,98 @@
+/*
+  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 int8_t      expected_value,
+           const size_t      expected_count)
+{
+  int8_t            value = 0;
+  const ExessResult r     = exess_read_byte(&value, string);
+
+  assert(r.status == expected_status);
+  assert(r.count == expected_count);
+  assert(value == expected_value);
+}
+
+static void
+test_read_byte(void)
+{
+  // Limits
+  check_read("-128", EXESS_SUCCESS, INT8_MIN, EXESS_MAX_BYTE_LENGTH);
+  check_read("127", EXESS_SUCCESS, INT8_MAX, 3);
+
+  // Out of range
+  check_read("-129", EXESS_OUT_OF_RANGE, 0, 4);
+  check_read("128", EXESS_OUT_OF_RANGE, 0, 3);
+
+  // Garbage
+  check_read("+", EXESS_EXPECTED_DIGIT, 0, 1);
+}
+
+static void
+check_write(const int8_t      value,
+            const ExessStatus expected_status,
+            const size_t      buf_size,
+            const char* const expected_string)
+{
+  char buf[EXESS_MAX_BYTE_LENGTH + 1] = {1, 2, 3, 4, 5};
+  assert(buf_size <= sizeof(buf));
+
+  const ExessResult r = exess_write_byte(value, buf_size, buf);
+  assert(r.status == expected_status);
+  assert(!strcmp(buf, expected_string));
+  assert(r.count == strlen(buf));
+  assert(r.status || exess_write_byte(value, 0, NULL).count == r.count);
+}
+
+static void
+test_write_byte(void)
+{
+  check_write(INT8_MIN, EXESS_SUCCESS, 5, "-128");
+  check_write(INT8_MAX, EXESS_SUCCESS, 4, "127");
+}
+
+static void
+test_round_trip(void)
+{
+  int8_t value                          = 0;
+  char   buf[EXESS_MAX_BYTE_LENGTH + 1] = {1, 2, 3, 4, 5};
+
+  for (int16_t i = INT8_MIN; i <= INT8_MAX; ++i) {
+    assert(!exess_write_byte((int8_t)i, sizeof(buf), buf).status);
+    assert(!exess_read_byte(&value, buf).status);
+    assert(value == i);
+  }
+}
+
+int
+main(void)
+{
+  test_read_byte();
+  test_write_byte();
+  test_round_trip();
+  return 0;
+}