1 files changed, 136 insertions, 0 deletions
diff --git a/examples/embedded_ui/UI_test_cpp.cpp b/examples/embedded_ui/UI_test_cpp.cpp
new file mode 100644
index 0000000..ecd9def
--- /dev/null
+++ b/examples/embedded_ui/UI_test_cpp.cpp
@@ -0,0 +1,136 @@
+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);
+}
+
+