testimage.bbclass, lib/oeqa: add headers and comments

Adds some comments to testimage.bbclass and the files it calls,
just to give an ideea of what it does.

(From OE-Core rev: 8bbb7116cf02466dfc59a17dc7bb51287aeea55b)

Signed-off-by: Stefan Stanacar <stefanx.stanacar@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/testimage.bbclass

@@ -1,3 +1,27 @@
+# Copyright (C) 2013 Intel Corporation
+#
+# Released under the MIT license (see COPYING.MIT)
+
+
+# testimage.bbclass enables testing of qemu images using python unittests.
+# Most of the tests are commands run on target image over ssh.
+# To use it add testimage to global inherit and call your target image with -c testimage
+# You can try it out like this:
+# - first build a qemu core-image-sato
+# - add INHERIT += "testimage" in local.conf
+# - then bitbake core-image-sato -c testimage. That will run a standard suite of tests.
+
+# You can set (or append to) TEST_SUITES in local.conf to select the tests
+# which you want to run for your target.
+# The test names are the module names in meta/lib/oeqa/runtime.
+# Each name in TEST_SUITES represents a required test for the image. (no skipping allowed)
+# Appending "auto" means that it will try to run all tests that are suitable for the image (each test decides that on it's own).
+# Note that order in TEST_SUITES is important (it's the order tests run) and it influences tests dependencies.
+
+# TEST_LOG_DIR contains a ssh log (what command is running, output and return codes) and a qemu boot log till login
+# Booting is handled by this class, and it's not a test in itself.
+# TEST_QEMUBOOT_TIMEOUT can be used to set the maximum time in seconds the launch code will wait for the login prompt.
+
 TEST_LOG_DIR ?= "${WORKDIR}/testimage"
 
 DEFAULT_TEST_SUITES = "ping auto"

meta/lib/oeqa/oetest.py

@@ -1,3 +1,12 @@
+# Copyright (C) 2013 Intel Corporation
+#
+# Released under the MIT license (see COPYING.MIT)
+
+# Main unittest module used by testimage.bbclass
+# This provides the oeRuntimeTest base class which is inherited by all tests in meta/lib/oeqa/runtime.
+
+# It also has some helper functions and it's responsible for actually starting the tests
+
 import os, re, mmap
 import unittest
 import inspect

meta/lib/oeqa/utils/decorators.py

@@ -1,3 +1,11 @@
+# Copyright (C) 2013 Intel Corporation
+#
+# Released under the MIT license (see COPYING.MIT)
+
+# Some custom decorators that can be used by unittests
+# Most useful is skipUnlessPassed which can be used for
+# creating dependecies between two test methods.
+
 from oeqa.oetest import *
 
 class skipIfFailure(object):

meta/lib/oeqa/utils/sshcontrol.py

@@ -1,3 +1,12 @@
+# Copyright (C) 2013 Intel Corporation
+#
+# Released under the MIT license (see COPYING.MIT)
+
+# Provides a class for setting up ssh connections,
+# running commands and copying files to/from a target.
+# It's used by testimage.bbclass and tests in lib/oeqa/runtime.
+
+
 import subprocess
 import time
 import os