1 files changed, 37 insertions, 0 deletions
diff --git a/02-usart/tests/test_irq.c b/02-usart/tests/test_irq.c
new file mode 100644
index 0000000..89eea11
--- /dev/null
+++ b/02-usart/tests/test_irq.c
@@ -0,0 +1,37 @@
+#include "test_harness.h"
+
+#include "core/irq.h"
+#include "core/nvic.h"
+
+TEST(irq, nvic)
+{
+  interrupt_set_t is = { 0 };
+
+  interrupt_set_add(&is, IRQ_USART2);
+  interrupt_set_add(&is, IRQ_USART3);
+
+  enable_interrupts(&is);
+
+  ASSERT_EQ(is.irqs[1], 0xC0);
+  ASSERT_EQ(NVIC.ise_r[1], 0xC0);
+}
+
+TEST(irq, nvic_edgecase)
+{
+  interrupt_set_t is = { 0 };
+  interrupt_set_add(&is, IRQ_WWDG_IRQ);
+  interrupt_set_add(&is, IRQ_I2C1_ER);
+
+  enable_interrupts(&is);
+
+  ASSERT_EQ(is.irqs[0], 1);
+  ASSERT_EQ(NVIC.ise_r[0], 1);
+  ASSERT_EQ(is.irqs[1], 1);
+  ASSERT_EQ(NVIC.ise_r[1], 1);
+}
+
+TEST(irq, enable_single_interrupt)
+{
+  enable_interrupt(IRQ_USART2);
+  ASSERT_EQ(NVIC.ise_r[1], 0x40);
+}