docs: Document the Test Cases

Create the in-code documentation for the test cases for automodule
documentation.
Signed-off-by: Fabien Lahoudere <fabien.lahoudere@collabora.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>

cros/tests/cros_ec_accel.py

@@ -9,6 +9,7 @@ import unittest
 
 class TestCrosECAccel(unittest.TestCase):
     def test_cros_ec_accel_iio_abi(self):
+        """ Checks the cros-ec accelerometer IIO ABI. """
         files = [
             "buffer",
             "calibrate",
@@ -38,10 +39,11 @@ class TestCrosECAccel(unittest.TestCase):
                 self, "/sys/bus/iio/devices", "cros-ec-accel", ["frequency"], True
             )
 
-    # This function validate accelerometer data by computing the magnitude.
-    # If the magnitude is not closed to 1G, that means data are invalid or
-    # the machine is in movement or there is a earth quake.
     def test_cros_ec_accel_iio_data_is_valid(self):
+        """ Validates accelerometer data by computing the magnitude. If the
+            magnitude is not closed to 1G, that means data are invalid or
+            the machine is in movement or there is a earth quake.
+        """
         ACCEL_1G_IN_MS2 = 9.8185
         ACCEL_MAG_VALID_OFFSET = 0.25
         match = 0

cros/tests/cros_ec_extcon.py

@@ -7,6 +7,7 @@ import unittest
 
 class TestCrosECextcon(unittest.TestCase):
     def test_cros_ec_extcon_usbc_abi(self):
+        """ Checks the cros-ec extcon ABI. """
         match = 0
         for devname in os.listdir("/sys/class/extcon"):
             devtype = read_file("/sys/class/extcon/" + devname + "/name")

cros/tests/cros_ec_gyro.py

@@ -8,6 +8,7 @@ import unittest
 
 class TestCrosECGyro(unittest.TestCase):
     def test_cros_ec_gyro_iio_abi(self):
+        """ Checks the cros-ec gyroscope IIO ABI. """
         files = [
             "buffer/",
             "calibrate",

cros/tests/cros_ec_mcu.py

@@ -8,21 +8,27 @@ import unittest
 
 class TestCrosECMCU(unittest.TestCase):
     def test_cros_ec_abi(self):
+        """ Checks the standard ABI for the main Embedded Controller. """
         check_mcu_abi(self, "ec")
 
     def test_cros_fp_abi(self):
+        """ Checks the standard ABI for the Fingerprint EC. """
         check_mcu_abi(self, "fp")
 
     def test_cros_tp_abi(self):
+        """ Checks the standard ABI for the Touchpad EC. """
         check_mcu_abi(self, "tp")
 
     def test_cros_pd_abi(self):
+        """ Checks the standard ABI for the Power Delivery EC. """
         check_mcu_abi(self, "pd")
 
     def test_cros_ec_chardev(self):
+        """ Checks the main Embedded controller character device. """
         self.assertEqual(os.path.exists("/dev/cros_ec"), 1)
 
     def test_cros_ec_hello(self):
+        """ Checks basic comunication with the main Embedded controller. """
         fd = open("/dev/cros_ec", "r")
         param = ec_params_hello()
         param.in_data = 0xA0B0C0D0  # magic number that the EC expects on HELLO

cros/tests/cros_ec_power.py

@@ -7,6 +7,7 @@ import unittest
 
 class TestCrosECPower(unittest.TestCase):
     def test_cros_ec_usbpd_charger_abi(self):
+        """ Check the cros USBPD charger ABI. """
         files = [
             "current_max",
             "input_current_limit",
@@ -26,6 +27,7 @@ class TestCrosECPower(unittest.TestCase):
         )
 
     def test_cros_ec_battery_abi(self):
+        """ Check the cros battery ABI. """
         files = [
             "alarm",
             "capacity_level",

cros/tests/cros_ec_pwm.py

@@ -7,6 +7,10 @@ import unittest
 
 class TestCrosECPWM(unittest.TestCase):
     def test_cros_ec_pwm_backlight(self):
+        """ Check that the backlight is connected to a pwm of the EC and that
+            programming a brightness level to the backlight affects the PWM
+            duty cycle.
+        """
         if not os.path.exists("/sys/class/backlight/backlight/max_brightness"):
             self.skipTest("No backlight pwm found, skipping")
         is_ec_pwm = False

cros/tests/cros_ec_rtc.py

@@ -8,6 +8,7 @@ import unittest
 
 class TestCrosECRTC(unittest.TestCase):
     def test_cros_ec_rtc_abi(self):
+        """ Check the cros RTC ABI. """
         if not is_feature_supported(EC_FEATURE_RTC):
             self.skipTest("EC_FEATURE_RTC not supported, skipping")
         match = 0