Unit tests for encoding/decoding of base types

2 files changed, 159 insertions, 0 deletions

diff --git a/tests/test_main.cpp b/tests/test_main.cpp
index ca1fe234c0..d837702eb0 100644
--- a/tests/test_main.cpp
+++ b/tests/test_main.cpp
@@ -49,6 +49,7 @@
 #include "test_json.h"
 #include "test_list.h"
 #include "test_lru.h"
+#include "test_marshalls.h"
 #include "test_math.h"
 #include "test_method_bind.h"
 #include "test_node_path.h"
diff --git a/tests/test_marshalls.h b/tests/test_marshalls.h
new file mode 100644
index 0000000000..30a25771f2
--- /dev/null
+++ b/tests/test_marshalls.h
@@ -0,0 +1,158 @@
+/*************************************************************************/
+/*  test_marshalls.h                                                     */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#ifndef TEST_MARSHALLS_H
+#define TEST_MARSHALLS_H
+
+#include "core/io/marshalls.h"
+
+#include "tests/test_macros.h"
+
+namespace TestMarshalls {
+
+TEST_CASE("[Marshalls] Unsigned 16 bit integer encoding") {
+	uint8_t arr[2];
+
+	unsigned int actual_size = encode_uint16(0x1234, arr);
+	CHECK(actual_size == sizeof(uint16_t));
+	CHECK_MESSAGE(arr[0] == 0x34, "First encoded byte value should be equal to low order byte value.");
+	CHECK_MESSAGE(arr[1] == 0x12, "Last encoded byte value should be equal to high order byte value.");
+}
+
+TEST_CASE("[Marshalls] Unsigned 32 bit integer encoding") {
+	uint8_t arr[4];
+
+	unsigned int actual_size = encode_uint32(0x12345678, arr);
+	CHECK(actual_size == sizeof(uint32_t));
+	CHECK_MESSAGE(arr[0] == 0x78, "First encoded byte value should be equal to low order byte value.");
+	CHECK(arr[1] == 0x56);
+	CHECK(arr[2] == 0x34);
+	CHECK_MESSAGE(arr[3] == 0x12, "Last encoded byte value should be equal to high order byte value.");
+}
+
+TEST_CASE("[Marshalls] Unsigned 64 bit integer encoding") {
+	uint8_t arr[8];
+
+	unsigned int actual_size = encode_uint64(0x0f123456789abcdef, arr);
+	CHECK(actual_size == sizeof(uint64_t));
+	CHECK_MESSAGE(arr[0] == 0xef, "First encoded byte value should be equal to low order byte value.");
+	CHECK(arr[1] == 0xcd);
+	CHECK(arr[2] == 0xab);
+	CHECK(arr[3] == 0x89);
+	CHECK(arr[4] == 0x67);
+	CHECK(arr[5] == 0x45);
+	CHECK(arr[6] == 0x23);
+	CHECK_MESSAGE(arr[7] == 0xf1, "Last encoded byte value should be equal to high order byte value.");
+}
+
+TEST_CASE("[Marshalls] Unsigned 16 bit integer decoding") {
+	uint8_t arr[] = { 0x34, 0x12 };
+
+	CHECK(decode_uint16(arr) == 0x1234);
+}
+
+TEST_CASE("[Marshalls] Unsigned 32 bit integer decoding") {
+	uint8_t arr[] = { 0x78, 0x56, 0x34, 0x12 };
+
+	CHECK(decode_uint32(arr) == 0x12345678);
+}
+
+TEST_CASE("[Marshalls] Unsigned 64 bit integer decoding") {
+	uint8_t arr[] = { 0xef, 0xcd, 0xab, 0x89, 0x67, 0x45, 0x23, 0xf1 };
+
+	CHECK(decode_uint64(arr) == 0x0f123456789abcdef);
+}
+
+TEST_CASE("[Marshalls] Floating point single precision encoding") {
+	uint8_t arr[4];
+
+	// Decimal: 0.15625
+	// IEEE 754 single-precision binary floating-point format:
+	// sign exponent (8 bits)    fraction (23 bits)
+	//  0       01111100      01000000000000000000000
+	// Hexadecimal: 0x3E200000
+	unsigned int actual_size = encode_float(0.15625f, arr);
+	CHECK(actual_size == sizeof(uint32_t));
+	CHECK(arr[0] == 0x00);
+	CHECK(arr[1] == 0x00);
+	CHECK(arr[2] == 0x20);
+	CHECK(arr[3] == 0x3e);
+}
+
+TEST_CASE("[Marshalls] Floating point double precision encoding") {
+	uint8_t arr[8];
+
+	// Decimal: 0.333333333333333314829616256247390992939472198486328125
+	// IEEE 754 double-precision binary floating-point format:
+	// sign exponent (11 bits)                  fraction (52 bits)
+	//  0      01111111101     0101010101010101010101010101010101010101010101010101
+	// Hexadecimal: 0x3FD5555555555555
+	unsigned int actual_size = encode_double(0.33333333333333333, arr);
+	CHECK(actual_size == sizeof(uint64_t));
+	CHECK(arr[0] == 0x55);
+	CHECK(arr[1] == 0x55);
+	CHECK(arr[2] == 0x55);
+	CHECK(arr[3] == 0x55);
+	CHECK(arr[4] == 0x55);
+	CHECK(arr[5] == 0x55);
+	CHECK(arr[6] == 0xd5);
+	CHECK(arr[7] == 0x3f);
+}
+
+TEST_CASE("[Marshalls] Floating point single precision decoding") {
+	uint8_t arr[] = { 0x00, 0x00, 0x20, 0x3e };
+
+	// See floating point encoding test case for details behind expected values
+	CHECK(decode_float(arr) == 0.15625f);
+}
+
+TEST_CASE("[Marshalls] Floating point double precision decoding") {
+	uint8_t arr[] = { 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0xd5, 0x3f };
+
+	// See floating point encoding test case for details behind expected values
+	CHECK(decode_double(arr) == 0.33333333333333333);
+}
+
+TEST_CASE("[Marshalls] C string encoding") {
+	char cstring[] = "Godot"; // 5 characters
+	uint8_t data[6];
+
+	int actual_size = encode_cstring(cstring, data);
+	CHECK(actual_size == 6);
+	CHECK(data[0] == 'G');
+	CHECK(data[1] == 'o');
+	CHECK(data[2] == 'd');
+	CHECK(data[3] == 'o');
+	CHECK(data[4] == 't');
+	CHECK(data[5] == '\0');
+}
+} // namespace TestMarshalls
+
+#endif // TEST_MARSHALLS_H