Add a stub mgos_gpio_remove_int_handler()

src/mgos_mock.c

@@ -133,3 +133,12 @@ bool mgos_gpio_set_pull(int pin, enum mgos_gpio_pull_type pull) {
   (void)pin;
   (void)pull;
 }
+
+void mgos_gpio_remove_int_handler(int pin, mgos_gpio_int_handler_f *old_cb, void **old_arg) {
+  LOG(LL_INFO, ("Not implemented."));
+  return;
+
+  (void)pin;
+  (void)old_cb;
+  (void)old_arg;
+}

tests/mcp23xxx.c

@@ -0,0 +1,36 @@
+#include "mgos.h"
+#include "mgos_mcp23xxx.h"
+#include "tests_autogen.h"
+
+uint32_t test_mcp23xxx_period_ms = 100;
+bool     test_mcp23xxx_enabled   = true;
+
+static struct mgos_mcp23xxx *s_dev;
+
+bool test_mcp23xxx_create(void) {
+  uint8_t i;
+  s_dev = mgos_mcp23017_create(mgos_i2c_get_global(), 0x20, -1);
+  if (!s_dev) return NULL;
+
+  for (i=0; i<8; i++)
+    mgos_mcp23xxx_gpio_setup_input(s_dev, i, MGOS_GPIO_PULL_UP);
+
+  for (i=8; i<16; i++)
+    mgos_mcp23xxx_gpio_set_mode(s_dev, i, MGOS_GPIO_MODE_OUTPUT);
+  return true;
+}
+
+bool test_mcp23xxx_run(void) {
+  uint8_t i;
+  mgos_mcp23xxx_gpio_read(s_dev, 0);
+
+  for (i=8; i<16; i++)
+    mgos_mcp23xxx_gpio_write(s_dev, i, random()%2);
+
+  return true;
+}
+
+bool test_mcp23xxx_destroy(void) {
+  mgos_mcp23xxx_destroy(&s_dev);
+  return true;
+}