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extern "C"{
#include "UI.h"
#include "SYSTEM.h"
#include "DISPLAY.h"
}
#include <gtest/gtest.h>
#include "../../fff.h"
DEFINE_FFF_GLOBALS;
/* SYSTEM.h */
FAKE_VOID_FUNC(SYSTEM_register_irq, irq_func_t, unsigned int);
/* DISPLAY.h */
FAKE_VOID_FUNC(DISPLAY_init);
FAKE_VOID_FUNC(DISPLAY_clear);
FAKE_VOID_FUNC(DISPLAY_output, char *);
FAKE_VALUE_FUNC(unsigned int, DISPLAY_get_line_capacity);
FAKE_VALUE_FUNC(unsigned int, DISPLAY_get_line_insert_index);
FAKE_VOID_FUNC(button_press_cbk);
class UITests : public testing::Test
{
public:
void SetUp()
{
// Register resets
RESET_FAKE(SYSTEM_register_irq);
RESET_FAKE(DISPLAY_init)
RESET_FAKE(DISPLAY_clear)
RESET_FAKE(DISPLAY_output)
RESET_FAKE(DISPLAY_get_line_capacity)
RESET_FAKE(DISPLAY_get_line_insert_index);
RESET_FAKE(button_press_cbk);
FFF_RESET_HISTORY();
// non default init
DISPLAY_get_line_capacity_fake.return_val = 2;
}
};
/* Tests go here */
TEST_F(UITests, init_will_initialise_display)
{
UI_init();
ASSERT_EQ(DISPLAY_init_fake.call_count, 1);
}
TEST_F(UITests, init_will_register_interrupt_gpio2)
{
UI_init();
ASSERT_EQ(SYSTEM_register_irq_fake.call_count, 1);
ASSERT_EQ((void *)SYSTEM_register_irq_fake.arg0_val, (void *)UI_button_irq_handler);
ASSERT_EQ(SYSTEM_register_irq_fake.arg1_val, IRQ_GPIO_2);
}
TEST_F(UITests, when_no_irq_then_missed_irq_counter_zero)
{
ASSERT_EQ(UI_get_missed_irqs(), 0);
}
TEST_F(UITests, when_one_irq_and_no_handler_then_missed_irq_counter_one)
{
UI_button_irq_handler();
ASSERT_EQ(UI_get_missed_irqs(), 1);
}
TEST_F(UITests, when_one_irq_and_valid_callback_then_missed_irq_counter_zero)
{
UI_init();
UI_register_button_cbk(button_press_cbk);
UI_button_irq_handler();
ASSERT_EQ(UI_get_missed_irqs(), 0);
}
TEST_F(UITests, when_one_irq_and_valid_callback_then_callback_called)
{
UI_register_button_cbk(button_press_cbk);
UI_button_irq_handler();
ASSERT_EQ(button_press_cbk_fake.call_count, 1);
}
TEST_F(UITests, write_line_outputs_lines_to_display)
{
char msg[] = "helloworld";
UI_write_line(msg);
ASSERT_EQ(DISPLAY_output_fake.call_count, 1);
ASSERT_EQ(strncmp(DISPLAY_output_fake.arg0_val, msg, 26), 0);
}
TEST_F(UITests, when_no_empty_lines_write_line_clears_screen_and_outputs_lines_to_display)
{
DISPLAY_get_line_insert_index_fake.return_val = 2;
char msg[] = "helloworld";
UI_write_line(msg);
ASSERT_EQ(DISPLAY_clear_fake.call_count, 1);
ASSERT_EQ(DISPLAY_output_fake.call_count, 1);
// Check the order of the calls: Don't care about the first two:
// DISPLAY_get_line_capacity and DISPLAY_get_line_insert_index
ASSERT_EQ(fff.call_history_idx, 4);
ASSERT_EQ(fff.call_history[2], (void *) DISPLAY_clear);
ASSERT_EQ(fff.call_history[3], (void *) DISPLAY_output);
}
TEST_F(UITests, when_empty_lines_write_line_doesnt_clear_screen)
{
// given
DISPLAY_get_line_insert_index_fake.return_val = 1;
char msg[] = "helloworld";
// when
UI_write_line(msg);
// then
ASSERT_EQ(DISPLAY_clear_fake.call_count, 0);
}
TEST_F(UITests, when_string_longer_than_26_then_truncated_string_output)
{
// given
char input[] = "abcdefghijklmnopqrstuvwxyz0123456789";
char expected[] = "abcdefghijklmnopqrstuvwxyz";
// when
UI_write_line(input);
// then
ASSERT_EQ(strncmp(expected, DISPLAY_output_fake.arg0_val, 37), 0);
}
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