adding Vulkan device creation, adding unit tests, adding few API function declarations

Tests/Vulkan/DeviceSetup.c

@@ -0,0 +1,11 @@
+#include <unity/unity.h>
+#include <Pulse.h>
+
+extern PulseBackend backend;
+
+void TestDeviceSetup()
+{
+	PulseDevice device = PulseCreateDevice(backend, NULL, 0);
+	TEST_ASSERT_NOT_EQUAL_MESSAGE(device, PULSE_NULL_HANDLE, PulseVerbaliseErrorType(PulseGetLastErrorType()));
+	PulseDestroyDevice(device);
+}

Tests/Vulkan/main.c

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+#include <unity/unity.h>
+#include <Pulse.h>
+
+#include <stdbool.h>
+
+PulseBackend backend;
+
+extern void TestDeviceSetup();
+
+bool SetupPulse()
+{
+	backend = PulseLoadBackend(PULSE_BACKEND_VULKAN, PULSE_SHADER_FORMAT_SPIRV_BIT, PULSE_NO_DEBUG);
+	if(backend == PULSE_NULL_HANDLE)
+	{
+		fprintf(stderr, "Fatal Error: could not load Pulse using Vulkan due to %s", PulseVerbaliseErrorType(PulseGetLastErrorType()));
+		return false;
+	}
+	puts("Pulse loaded using Vulkan");
+	return true;
+}
+
+int RunUnitTests()
+{
+	UNITY_BEGIN();
+	RUN_TEST(TestDeviceSetup);
+	return UNITY_END();
+}
+
+void UnloadPulse()
+{
+	PulseUnloadBackend(backend);
+	puts("Pulse unloaded");
+}
+
+int main(void)
+{
+	SetupPulse();
+	int result = RunUnitTests();
+	UnloadPulse();
+	return result;
+}

Tests/Vulkan/xmake.lua

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+option("vulkan-tests", { description = "Build Vulkan tests", default = false })
+
+if has_config("vulkan-tests") then
+	set_group("VulkanTests")
+	add_requires("unity_test")
+
+	target("VulkanUnitTests")
+		set_kind("binary")
+		add_deps("pulse_gpu")
+		add_files("**.c")
+		add_packages("unity_test")
+		if is_plat("linux") then
+			set_extension(".x86_64")
+		end
+	target_end()
+end