From cedeebec5935a352edd5aa1b985d0066ebb41e4b Mon Sep 17 00:00:00 2001
From: Yuval Peress <peress@google.com>
Date: Fri, 24 Feb 2023 11:57:25 -0700
Subject: [PATCH] sensor: add unit tests for icm42688 interrupt

Add a test that verifies that when the INPUT GPIO fires, we get the
trigger callback.

Signed-off-by: Yuval Peress <peress@google.com>
---
 .../icm42688/boards/native_posix.overlay      |  1 +
 tests/drivers/sensor/icm42688/prj.conf        |  3 ++
 tests/drivers/sensor/icm42688/src/main.c      | 31 +++++++++++++++++++
 3 files changed, 35 insertions(+)

diff --git a/tests/drivers/sensor/icm42688/boards/native_posix.overlay b/tests/drivers/sensor/icm42688/boards/native_posix.overlay
index 916123ce1dc..9247b6365bb 100644
--- a/tests/drivers/sensor/icm42688/boards/native_posix.overlay
+++ b/tests/drivers/sensor/icm42688/boards/native_posix.overlay
@@ -5,6 +5,7 @@
 &spi0 {
 	icm42688: icm42688@3 {
 		compatible = "invensense,icm42688";
+		int-gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;
 		spi-max-frequency = <50000000>;
 		reg = <3>;
 	};
diff --git a/tests/drivers/sensor/icm42688/prj.conf b/tests/drivers/sensor/icm42688/prj.conf
index cdcf3144034..94239648124 100644
--- a/tests/drivers/sensor/icm42688/prj.conf
+++ b/tests/drivers/sensor/icm42688/prj.conf
@@ -4,6 +4,9 @@
 CONFIG_ZTEST=y
 CONFIG_ZTEST_NEW_API=y
 
+# Enable GPIO
+CONFIG_GPIO=y
+
 # Enable sensors
 CONFIG_SENSOR=y
 
diff --git a/tests/drivers/sensor/icm42688/src/main.c b/tests/drivers/sensor/icm42688/src/main.c
index 6dd406867ee..a4d314dd08a 100644
--- a/tests/drivers/sensor/icm42688/src/main.c
+++ b/tests/drivers/sensor/icm42688/src/main.c
@@ -3,14 +3,22 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#include <zephyr/device.h>
 #include <zephyr/devicetree.h>
 #include <zephyr/drivers/emul.h>
+#include <zephyr/drivers/gpio.h>
+#include <zephyr/drivers/gpio/gpio_emul.h>
 #include <zephyr/drivers/sensor.h>
+#include <zephyr/fff.h>
 #include <zephyr/ztest.h>
 
 #include "icm42688_emul.h"
 #include "icm42688_reg.h"
 
+#define NODE DT_NODELABEL(icm42688)
+
+DEFINE_FFF_GLOBALS;
+
 struct icm42688_fixture {
 	const struct device *dev;
 	const struct emul *target;
@@ -209,3 +217,26 @@ ZTEST_F(icm42688, test_fetch_gyro)
 	test_fetch_gyro_with_range(fixture, 31250, gyro_percent);
 	test_fetch_gyro_with_range(fixture, 15625, gyro_percent);
 }
+
+FAKE_VOID_FUNC(test_interrupt_trigger_handler, const struct device*, const struct sensor_trigger*);
+
+ZTEST_F(icm42688, test_interrupt)
+{
+	const struct gpio_dt_spec spec = GPIO_DT_SPEC_GET(NODE, int_gpios);
+	const struct sensor_trigger trigger = {
+		.type = SENSOR_TRIG_DATA_READY,
+		.chan = SENSOR_CHAN_ALL,
+	};
+
+	RESET_FAKE(test_interrupt_trigger_handler);
+	sensor_trigger_set(fixture->dev, &trigger, test_interrupt_trigger_handler);
+
+	/* Toggle the GPIO */
+	gpio_emul_input_set(spec.port, spec.pin, 0);
+	k_msleep(5);
+	gpio_emul_input_set(spec.port, spec.pin, 1);
+	k_msleep(5);
+
+	/* Verify the handler was called */
+	zassert_equal(test_interrupt_trigger_handler_fake.call_count, 1);
+}