diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..72989b2
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,10 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = tab
+indent_style = tab
+insert_final_newline = true
+max_line_length = 120
+tab_width = 2
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 18fd467..12056c0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,54 +6,81 @@ project(izanagi C)
 set(CMAKE_C_STANDARD 11)
 
 include_directories(
-	"${PROJECT_SOURCE_DIR}/dependencies/SDL2/include"
-	"${PROJECT_SOURCE_DIR}/dependencies/minIni/dev"
-	"${PROJECT_SOURCE_DIR}/dependencies/bdd-for-c"
-	"${PROJECT_SOURCE_DIR}/dependencies/portmidi/pm_common"
+  "${PROJECT_SOURCE_DIR}/dependencies/SDL2/include"
+  "${PROJECT_SOURCE_DIR}/dependencies/minIni/dev"
+  "${PROJECT_SOURCE_DIR}/dependencies/bdd-for-c"
+  "${PROJECT_SOURCE_DIR}/dependencies/portmidi/pm_common"
 )
 
 if (WIN32)
-	if (CMAKE_SIZEOF_VOID_P EQUAL 8)
-		set(PROJECT_ARCH x64)
-	else ()
-		set(PROJECT_ARCH x86)
-	endif ()
+  if (CMAKE_SIZEOF_VOID_P EQUAL 8)
+    set(PROJECT_ARCH x64)
+  else ()
+    set(PROJECT_ARCH x86)
+  endif ()
 endif ()
 
 link_directories(
-	"${PROJECT_SOURCE_DIR}/dependencies/SDL2/lib/${PROJECT_ARCH}"
-	"${PROJECT_SOURCE_DIR}/dependencies/portmidi/Release"
+  "${PROJECT_SOURCE_DIR}/dependencies/SDL2/lib/${PROJECT_ARCH}"
+  "${PROJECT_SOURCE_DIR}/dependencies/portmidi/Release"
 )
 
 add_executable(
-	game
-		dependencies/minIni/dev/minIni.h
-		dependencies/minIni/dev/minIni.c
-		src/packages/game/output/IZ_video.h
-		src/packages/game/output/IZ_video.c
-		src/packages/game/IZ_common.h
-		src/packages/game/IZ_action.h
-		src/packages/game/IZ_app.h
-		src/packages/game/IZ_app.c
-		src/packages/game/main.c
-		src/packages/game/input/IZ_joystick.c src/packages/game/input/IZ_joystick.h src/packages/game/input/IZ_keyboard.c src/packages/game/input/IZ_keyboard.h src/packages/game/IZ_config.c src/packages/game/IZ_config.h)
+  game
+    dependencies/minIni/dev/minIni.h
+        dependencies/minIni/dev/minIni.c
+    src/packages/game/output/IZ_video.h
+    src/packages/game/output/IZ_video.c
+    src/packages/game/IZ_common.h
+    src/packages/game/IZ_action.h
+    src/packages/game/IZ_app.h
+    src/packages/game/IZ_app.c
+    src/packages/game/main.c
+    src/packages/game/input/IZ_joystick.c
+    src/packages/game/input/IZ_joystick.h
+    src/packages/game/input/IZ_keyboard.c
+    src/packages/game/input/IZ_keyboard.h
+    src/packages/game/IZ_config.c
+    src/packages/game/IZ_config.h
+)
 target_link_libraries(
-	game
-		SDL2main
-		SDL2
+  game
+    SDL2main
+    SDL2
 )
 
 add_executable(
-	game-test
-		dependencies/bdd-for-c/bdd-for-c.h
-		src/packages/game/output/IZ_video.h
-		src/packages/game/output/IZ_video.c
-		src/packages/game/output/IZ_config.test.c
-		src/packages/test/IZ_mock.h)
+  game-test-output
+    dependencies/bdd-for-c/bdd-for-c.h
+    src/packages/test/IZ_mock.h src/packages/test/IZ_test.h
+        __mocks__/minIni.mock.h
+
+    src/packages/game/IZ_config.h
+
+    src/packages/game/output/IZ_video.h
+    src/packages/game/output/IZ_video.c
+    src/packages/game/output/IZ_video.test.c
+        __mocks__/SDL_keyboard.mock.h src/packages/game/__mocks__/IZ_config.mock.h)
+
+add_executable(
+  game-test-input
+    dependencies/bdd-for-c/bdd-for-c.h
+    src/packages/test/IZ_mock.h src/packages/test/IZ_test.h
+        __mocks__/minIni.mock.h
+
+    src/packages/game/IZ_config.h
+
+    src/packages/game/input/IZ_keyboard.h
+    src/packages/game/input/IZ_keyboard.c
+    src/packages/game/input/IZ_keyboard.test.c
+
+#    src/packages/game/input/IZ_joystick.h
+#    src/packages/game/input/IZ_joystick.c
+        __mocks__/SDL_keyboard.mock.h src/packages/game/__mocks__/IZ_config.mock.h)
 
 if (WIN32)
-	add_custom_command(TARGET game POST_BUILD
-		COMMAND ${CMAKE_COMMAND} -E copy_if_different  # which executes "cmake - E copy_if_different..."
-		"${PROJECT_SOURCE_DIR}/dependencies/SDL2/lib/${PROJECT_ARCH}/SDL2.dll"      # <--this is in-file
-		$<TARGET_FILE_DIR:game>)                 # <--this is out-file path
+  add_custom_command(TARGET game POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E copy_if_different  # which executes "cmake - E copy_if_different..."
+    "${PROJECT_SOURCE_DIR}/dependencies/SDL2/lib/${PROJECT_ARCH}/SDL2.dll"      # <--this is in-file
+    $<TARGET_FILE_DIR:game>)                 # <--this is out-file path
 endif ()
diff --git a/__mocks__/SDL_keyboard.mock.h b/__mocks__/SDL_keyboard.mock.h
new file mode 100644
index 0000000..71ebcb3
--- /dev/null
+++ b/__mocks__/SDL_keyboard.mock.h
@@ -0,0 +1,14 @@
+#ifndef SDL_KEYBOARD_MOCK_H
+#define SDL_KEYBOARD_MOCK_H
+
+#include "../src/packages/test/IZ_test.h"
+
+mock(SDL_GetKeyName) const char* SDL_GetKeyName(int key) {
+	mock_return(SDL_GetKeyName) "";
+}
+
+mock(SDL_GetKeyFromName) int SDL_GetKeyFromName(const char *name) {
+	mock_return(SDL_GetKeyFromName) 0;
+}
+
+#endif
diff --git a/__mocks__/minIni.mock.h b/__mocks__/minIni.mock.h
new file mode 100644
index 0000000..9191a7d
--- /dev/null
+++ b/__mocks__/minIni.mock.h
@@ -0,0 +1,29 @@
+#ifndef MININI_MOCK_H
+#define MININI_MOCK_H
+
+#include "../src/packages/test/IZ_test.h"
+
+mock(ini_getl) long ini_getl(const TCHAR *Section, const TCHAR *Key, long DefValue, const TCHAR *Filename) {
+	mock_return(ini_getl) DefValue;
+}
+
+mock(ini_putl) int ini_putl(const TCHAR *Section, const TCHAR *Key, long Value, const TCHAR *Filename) {
+	mock_return(ini_putl) 1;
+}
+
+mock(ini_gets) int ini_gets(
+	const TCHAR *Section,
+	const TCHAR *Key,
+	const TCHAR *DefValue,
+	TCHAR *Buffer,
+	int BufferSize,
+	const TCHAR *Filename
+) {
+	mock_return(ini_gets) 0;
+}
+
+mock(ini_puts) int ini_puts(const TCHAR *Section, const TCHAR *Key, const TCHAR *Value, const TCHAR *Filename) {
+	mock_return(ini_puts) 1;
+}
+
+#endif
diff --git a/src/packages/game/IZ_config.c b/src/packages/game/IZ_config.c
index f1dda1f..e9cf71a 100644
--- a/src/packages/game/IZ_config.c
+++ b/src/packages/game/IZ_config.c
@@ -1,8 +1,8 @@
 #include "IZ_config.h"
 
-void IZ_GetConfigPath(char* config_path) {
+void IZ_GetConfigPath(char* config_path, size_t string_size) {
 	//const char* config_path_dir = SDL_GetPrefPath("Modal Studios", APP_NAME);
 	const char* config_path_dir = SDL_GetBasePath();
-	memcpy_s(config_path, 128, config_path_dir, 128);
-	strcat_s(config_path, 128, "config.ini");
+	memcpy_s(config_path, string_size, config_path_dir, 128);
+	strcat_s(config_path, string_size, "config.ini");
 }
diff --git a/src/packages/game/IZ_config.h b/src/packages/game/IZ_config.h
index 10fb5b6..f9fcefe 100644
--- a/src/packages/game/IZ_config.h
+++ b/src/packages/game/IZ_config.h
@@ -4,6 +4,6 @@
 #include <SDL_filesystem.h>
 #include <string.h>
 
-void IZ_GetConfigPath(char* config_path);
+void IZ_GetConfigPath(char*, size_t);
 
 #endif
diff --git a/src/packages/game/__mocks__/IZ_config.mock.h b/src/packages/game/__mocks__/IZ_config.mock.h
new file mode 100644
index 0000000..af0a879
--- /dev/null
+++ b/src/packages/game/__mocks__/IZ_config.mock.h
@@ -0,0 +1,12 @@
+#ifndef IZ_CONFIG_MOCK_H
+#define IZ_CONFIG_MOCK_H
+
+#include "../../test/IZ_test.h"
+
+mock(IZ_GetConfigPath) void IZ_GetConfigPath(char* config_path, size_t string_size) {
+	const char dummy_path[] = "test-config.ini";
+	memcpy_s(config_path, string_size, dummy_path, 128);
+	mock_return(IZ_GetConfigPath);
+}
+
+#endif
diff --git a/src/packages/game/input/IZ_joystick.c b/src/packages/game/input/IZ_joystick.c
index 25584f6..5c252b2 100644
--- a/src/packages/game/input/IZ_joystick.c
+++ b/src/packages/game/input/IZ_joystick.c
@@ -74,7 +74,7 @@ void IZ_HandleJoystickEvents(SDL_Event e, IZ_JoystickState* state, IZ_Action* ac
 
 void IZ_LoadJoystickConfig(IZ_JoystickConfig* config, uint8_t p) {
 	char config_path[128];
-	IZ_GetConfigPath(config_path);
+	IZ_GetConfigPath(config_path, 128);
 
 	char joystick_control_mapping_section_name[] = "Joystick.0.ControlMapping";
 	joystick_control_mapping_section_name[9] = (char) (48 + p);
@@ -89,7 +89,7 @@ void IZ_LoadJoystickConfig(IZ_JoystickConfig* config, uint8_t p) {
 
 void IZ_SaveJoystickConfig(IZ_JoystickConfig* config, uint8_t p) {
 	char config_path[128];
-	IZ_GetConfigPath(config_path);
+	IZ_GetConfigPath(config_path, 128);
 
 	char joystick_control_mapping_section_name[] = "Joystick.0.ControlMapping";
 	joystick_control_mapping_section_name[9] = (char) (48 + p);
diff --git a/src/packages/game/input/IZ_keyboard.c b/src/packages/game/input/IZ_keyboard.c
index dd2a983..1d54edd 100644
--- a/src/packages/game/input/IZ_keyboard.c
+++ b/src/packages/game/input/IZ_keyboard.c
@@ -15,11 +15,10 @@ void IZ_HandleKeyboardEvents(SDL_Event e, IZ_KeyboardState* state, IZ_Action* ac
 
 void IZ_SaveKeyboardConfig(IZ_KeyboardConfig* config, uint8_t p) {
 	char config_path[128];
-	IZ_GetConfigPath(config_path);
+	IZ_GetConfigPath(config_path, 128);
 
 	char keyboard_section_name[] = "Keyboard.0.ControlMapping";
 	keyboard_section_name[9] = (char) (48 + p);
-
 	for (uint8_t i = 0; i < CONTROLS; i += 1) {
 		ini_puts(keyboard_section_name, ACTION_NAMES[i], SDL_GetKeyName(config->control_mapping[i]), config_path);
 	}
@@ -27,7 +26,7 @@ void IZ_SaveKeyboardConfig(IZ_KeyboardConfig* config, uint8_t p) {
 
 void IZ_LoadKeyboardConfig(IZ_KeyboardConfig* config, uint8_t p) {
 	char config_path[128];
-	IZ_GetConfigPath(config_path);
+	IZ_GetConfigPath(config_path, 128);
 
 	char buffer[128];
 	char keyboard_section_name[] = "Keyboard.0.ControlMapping";
diff --git a/src/packages/game/input/IZ_keyboard.test.c b/src/packages/game/input/IZ_keyboard.test.c
new file mode 100644
index 0000000..1c24c6b
--- /dev/null
+++ b/src/packages/game/input/IZ_keyboard.test.c
@@ -0,0 +1,101 @@
+#include "../../../__mocks__/SDL_keyboard.mock.h"
+#include "../../../__mocks__/minIni.mock.h"
+#include "../__mocks__/IZ_config.mock.h"
+#include "IZ_keyboard.h"
+
+spec("input/keyboard") {
+	describe("HandleKeyboardEvents") {
+		static SDL_Event e;
+		static IZ_KeyboardState state;
+		static IZ_Action action;
+
+		for (uint8_t i = 0; i < CONTROLS; i += 1) {
+			it("handles %s action activation", ACTION_NAMES[i]) {
+				e.type = SDL_KEYDOWN;
+				e.key.keysym.sym = IZ_DEFAULT_KEYBOARD_CONTROLS[0][i];
+				state.config.control_mapping[i] = IZ_DEFAULT_KEYBOARD_CONTROLS[0][i];
+				action = 0;
+
+				IZ_HandleKeyboardEvents(e, &state, &action);
+				check(
+					action == (0x1 << i),
+					"Action not set."
+				);
+			}
+
+			it("handles %s action deactivation", ACTION_NAMES[i]) {
+				e.type = SDL_KEYUP;
+				e.key.keysym.sym = IZ_DEFAULT_KEYBOARD_CONTROLS[0][i];
+				state.config.control_mapping[i] = IZ_DEFAULT_KEYBOARD_CONTROLS[0][i];
+				action = ~0;
+
+				IZ_HandleKeyboardEvents(e, &state, &action);
+				check(
+					!(action & (0x1 << i)),
+					"Action not unset."
+				);
+			}
+		}
+	}
+
+	describe("LoadKeyboardConfig") {
+		static IZ_KeyboardConfig config;
+
+		after_each() {
+			mock_reset(IZ_GetConfigPath);
+		}
+
+		after_each() {
+			mock_reset(ini_gets);
+		}
+
+		it("calls load method") {
+			mock_set_expected_calls(ini_gets, CONTROLS);
+
+			IZ_LoadKeyboardConfig(&config, 0);
+
+			check(
+				mock_is_called(IZ_GetConfigPath),
+				"SDL_GetBasePath() not called."
+			);
+
+			check(
+				mock_get_expected_calls(ini_gets) == mock_get_actual_calls(ini_gets),
+				"Call count mismatch for ini_gets() (expected %u, received %u).",
+				mock_get_expected_calls(ini_gets),
+				mock_get_actual_calls(ini_gets)
+			);
+		}
+	}
+
+	describe("SaveKeyboardConfig") {
+		static IZ_KeyboardConfig config;
+
+		after_each() {
+			mock_reset(IZ_GetConfigPath);
+		}
+
+		after_each() {
+			mock_reset(ini_puts);
+		}
+
+		before_each() {
+			for (uint8_t i = 0; i < CONTROLS; i += 1) {
+				config.control_mapping[i] = IZ_DEFAULT_KEYBOARD_CONTROLS[0][i];
+			}
+		}
+
+		it("calls save method") {
+			mock_set_expected_calls(ini_puts, CONTROLS);
+
+			IZ_SaveKeyboardConfig(&config, 0);
+
+			check(
+				mock_get_expected_calls(ini_puts) == mock_get_actual_calls(ini_puts),
+				"Call count mismatch for ini_puts() (expected %u, received %u).",
+				mock_get_expected_calls(ini_puts),
+				mock_get_actual_calls(ini_puts)
+			);
+		}
+	}
+}
diff --git a/src/packages/game/output/IZ_config.test.c b/src/packages/game/output/IZ_config.test.c
deleted file mode 100644
index 590b5d7..0000000
--- a/src/packages/game/output/IZ_config.test.c
+++ /dev/null
@@ -1,126 +0,0 @@
-#include <bdd-for-c.h>
-#include "../../test/IZ_mock.h"
-#include "IZ_video.h"
-
-mock(SDL_GetBasePath) char* SDL_GetBasePath() {
-	mock_return(SDL_GetBasePath) "";
-}
-
-mock(SDL_GetKeyName) const char* SDL_GetKeyName (SDL_KeyCode code) {
-	mock_return(SDL_GetKeyName) "";
-}
-
-mock(SDL_GetKeyFromName) SDL_KeyCode SDL_GetKeyFromName(const char* name) {
-	mock_return(SDL_GetKeyFromName) 0;
-}
-
-mock(ini_gets) int ini_gets(
-	const TCHAR *Section,
-	const TCHAR *Key,
-	const TCHAR *DefValue,
-	char *Buffer,
-	int BufferSize,
-	const TCHAR *Filename
-) {
-	mock_return(ini_gets) 0;
-}
-
-mock(ini_getl) long ini_getl(
-	const TCHAR *Section,
-	const TCHAR *Key,
-	long DefValue,
-	const TCHAR *Filename
-) {
-	mock_return(ini_getl) DefValue;
-}
-
-spec("config") {
-	describe("LoadConfig") {
-		static IZ_Config config;
-
-		after_each() {
-			mock_reset(ini_getl);
-		}
-
-		after_each() {
-			mock_reset(ini_gets);
-		}
-
-		after_each() {
-			mock_reset(SDL_GetKeyFromName);
-		}
-
-		after_each() {
-			mock_reset(SDL_GetKeyName);
-		}
-
-		after_each() {
-			mock_reset(SDL_GetBasePath);
-		}
-
-		it("should load default config values") {
-			IZ_LoadVideoConfig(&config);
-
-			check(
-				mock_calls(SDL_GetBasePath) > 0,
-				"SDL_GetBasePath() not called."
-			);
-
-			static const mock_call_count_t expected_calls_ini_getl =
-				3 // video params
-				+ 1 // input params
-				+ (12 * PLAYERS); // joystick controls
-			check(
-				mock_calls(ini_getl) == expected_calls_ini_getl,
-				"Call count mismatch for ini_getl() (expected %u, received %u).",
-				expected_calls_ini_getl,
-				mock_calls(ini_getl)
-			);
-
-			check(
-				config.video.width == 640,
-				"Default value for Video.Width is not loaded."
-			);
-			check(
-				config.video.height == 480,
-				"Default value for Video.Height is not loaded."
-			);
-			check(
-				config.video.max_fps == 30,
-				"Default value for Video.MaxFps is not loaded."
-			);
-
-			check(
-				config.input.axis_threshold == 8000,
-				"Default value for Input.GamepadAxisThreshold is not loaded."
-			);
-
-			static const mock_call_count_t expected_calls_ini_gets =
-				(16 * PLAYERS); // keyboard controls
-			check(
-				mock_calls(ini_gets) == expected_calls_ini_gets,
-				"Call count mismatch for ini_gets() (expected %u, received %u).",
-				expected_calls_ini_gets,
-				mock_calls(ini_gets)
-			);
-
-			static const mock_call_count_t expected_calls_SDL_GetKeyFromName =
-				(16 * PLAYERS); // keyboard controls
-			check(
-				mock_calls(SDL_GetKeyFromName) == expected_calls_SDL_GetKeyFromName,
-				"Call count mismatch for SDL_GetKeyFromName() (expected %u, received %u).",
-				expected_calls_SDL_GetKeyFromName,
-				mock_calls(SDL_GetKeyFromName)
-			);
-
-			static const mock_call_count_t expected_calls_SDL_GetKeyName =
-				(16 * PLAYERS); // keyboard controls
-			check(
-				mock_calls(SDL_GetKeyName) == expected_calls_SDL_GetKeyName,
-				"Call count mismatch for SDL_GetKeyName() (expected %u, received %u).",
-				expected_calls_SDL_GetKeyName,
-				mock_calls(SDL_GetKeyName)
-			);
-		}
-	}
-}
diff --git a/src/packages/game/output/IZ_video.c b/src/packages/game/output/IZ_video.c
index cc50c71..6a54230 100644
--- a/src/packages/game/output/IZ_video.c
+++ b/src/packages/game/output/IZ_video.c
@@ -1,17 +1,25 @@
 #include "IZ_video.h"
 
-void IZ_SaveVideoConfig(IZ_VideoConfig* config) {
+IZ_ProcedureResult IZ_SaveVideoConfig(IZ_VideoConfig* config) {
 	char config_path[128];
-	IZ_GetConfigPath(config_path);
+	IZ_GetConfigPath(config_path, 128);
 
-	ini_putl("Video", "Width", config->width, config_path);
-	ini_putl("Video", "Height", config->height, config_path);
-	ini_putl("Video", "MaxFps", config->max_fps, config_path);
+	if (!ini_putl("Video", "Width", config->width, config_path)) {
+		return 1;
+	}
+	if (!ini_putl("Video", "Height", config->height, config_path)) {
+		return 1;
+	}
+	if (!ini_putl("Video", "MaxFps", config->max_fps, config_path)) {
+		return 1;
+	}
+
+	return 0;
 }
 
 void IZ_LoadVideoConfig(IZ_VideoConfig* config) {
 	char config_path[128];
-	IZ_GetConfigPath(config_path);
+	IZ_GetConfigPath(config_path, 128);
 
 	config->width = ini_getl("Video", "Width", 640l, config_path);
 	config->height = ini_getl("Video", "Height", 480l, config_path);
diff --git a/src/packages/game/output/IZ_video.h b/src/packages/game/output/IZ_video.h
index 8b8833b..b2fb3fb 100644
--- a/src/packages/game/output/IZ_video.h
+++ b/src/packages/game/output/IZ_video.h
@@ -3,6 +3,7 @@
 
 #include <stdio.h>
 #include <minIni.h>
+#include "../IZ_common.h"
 #include "../IZ_config.h"
 
 typedef struct {
@@ -11,7 +12,7 @@ typedef struct {
 	uint8_t max_fps;
 } IZ_VideoConfig;
 
-void IZ_SaveVideoConfig(IZ_VideoConfig* config);
+IZ_ProcedureResult IZ_SaveVideoConfig(IZ_VideoConfig* config);
 
 void IZ_LoadVideoConfig(IZ_VideoConfig* config);
 
diff --git a/src/packages/game/output/IZ_video.test.c b/src/packages/game/output/IZ_video.test.c
new file mode 100644
index 0000000..e67196c
--- /dev/null
+++ b/src/packages/game/output/IZ_video.test.c
@@ -0,0 +1,66 @@
+#include "../../../__mocks__/minIni.mock.h"
+#include "../__mocks__/IZ_config.mock.h"
+#include "IZ_video.h"
+
+spec("output/video") {
+	describe("LoadVideoConfig") {
+		static IZ_VideoConfig config;
+
+		after_each() {
+			mock_reset(IZ_GetConfigPath);
+		}
+
+		after_each() {
+			mock_reset(ini_getl);
+		}
+
+		it("calls load method") {
+			mock_set_expected_calls(ini_getl, 3);
+
+			IZ_LoadVideoConfig(&config);
+
+			check(
+				mock_is_called(IZ_GetConfigPath),
+				"SDL_GetBasePath() not called."
+			);
+
+			check(
+				mock_get_expected_calls(ini_getl) == mock_get_actual_calls(ini_getl),
+				"Call count mismatch for ini_getl() (expected %u, received %u).",
+				mock_get_expected_calls(ini_getl),
+				mock_get_actual_calls(ini_getl)
+			);
+		}
+	}
+
+	describe("SaveVideoConfig") {
+		static IZ_VideoConfig config;
+
+		after_each() {
+			mock_reset(IZ_GetConfigPath);
+		}
+
+		after_each() {
+			mock_reset(ini_putl);
+		}
+
+		before_each() {
+			config.width = 1337;
+			config.height = 420;
+			config.max_fps = 69;
+		}
+
+		it("calls save method") {
+			mock_set_expected_calls(ini_putl, 3);
+
+			IZ_SaveVideoConfig(&config);
+
+			check(
+				mock_get_expected_calls(ini_putl) == mock_get_actual_calls(ini_putl),
+				"Call count mismatch for ini_putl() (expected %u, received %u).",
+				mock_get_expected_calls(ini_putl),
+				mock_get_actual_calls(ini_putl)
+			);
+		}
+	}
+}
diff --git a/src/packages/test/IZ_mock.h b/src/packages/test/IZ_mock.h
index 1ea5731..c8a7bd4 100644
--- a/src/packages/test/IZ_mock.h
+++ b/src/packages/test/IZ_mock.h
@@ -1,14 +1,20 @@
 #ifndef IZ_MOCK_H
 #define IZ_MOCK_H
 
-#define mock_call_count_t uint8_t
+#define mock_call_count_t unsigned char
 
-#define mock(X) static mock_call_count_t calls_##X = 0;
+#define mock(X) static mock_call_count_t actual_##X = 0;
 
-#define mock_return(X) calls_##X += 1; return
+#define mock_return(X) actual_##X += 1; return
 
-#define mock_reset(X) calls_##X = 0
+#define mock_reset(X) actual_##X = 0
 
-#define mock_calls(X) ((mock_call_count_t) (calls_##X))
+#define mock_get_actual_calls(X) (mock_call_count_t) actual_##X
+
+#define mock_set_expected_calls(X, Y) static const mock_call_count_t expected_##X = Y
+
+#define mock_get_expected_calls(X) (mock_call_count_t) expected_##X
+
+#define mock_is_called(X) mock_get_actual_calls(X) > 0
 
 #endif
diff --git a/src/packages/test/IZ_test.h b/src/packages/test/IZ_test.h
new file mode 100644
index 0000000..9e938ee
--- /dev/null
+++ b/src/packages/test/IZ_test.h
@@ -0,0 +1,8 @@
+#ifndef IZ_TEST_H
+#define IZ_TEST_H
+
+#include <bdd-for-c.h>
+
+#include "IZ_mock.h"
+
+#endif