[oe-commits] [openembedded-core] 06/26: oeqa/kerneldevelopment: Able to apply a single patch to the Linux kernel source

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rpurdie pushed a commit to branch master-next
in repository openembedded-core.

commit 6f14ed08a63ce95eac45ec6f90df58e4e06ed3ac
Author: Mazliana <mazliana.mohamad at intel.com>
AuthorDate: Fri Aug 23 10:29:18 2019 +0800

    oeqa/kerneldevelopment: Able to apply a single patch to the Linux kernel source
    
    Purpose of kernel development is basically to customize our
    own recipes kernel by reused existing recipes.
     
    This is an initiative of automating manual kernel development
    test cases. Applying a single patch to the Linux kernel source
    is one of the manual test cases of kernel development.
    
    Objective of this test is as a developer we can make changes of
    a file in kernel source and able to apply a single patch to
    the kernel source.
     
    ref:https://wiki.yoctoproject.org/wiki/Kernel_Development_Test_Cases
    
    Signed-off-by: Mazliana <mazliana.mohamad at intel.com>
    Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
 meta/lib/oeqa/selftest/cases/kerneldevelopment.py | 67 +++++++++++++++++++++++
 1 file changed, 67 insertions(+)

diff --git a/meta/lib/oeqa/selftest/cases/kerneldevelopment.py b/meta/lib/oeqa/selftest/cases/kerneldevelopment.py
new file mode 100644
index 0000000..a61876e
--- /dev/null
+++ b/meta/lib/oeqa/selftest/cases/kerneldevelopment.py
@@ -0,0 +1,67 @@
+import os
+from oeqa.selftest.case import OESelftestTestCase
+from oeqa.utils.commands import runCmd, get_bb_var
+from oeqa.utils.git import GitRepo
+
+class KernelDev(OESelftestTestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        super(KernelDev, cls).setUpClass()
+        # Create the recipe directory structure inside the created layer
+        cls.layername = 'meta-kerneltest'
+        runCmd('bitbake-layers create-layer %s' % cls.layername)
+        runCmd('mkdir -p %s/recipes-kernel/linux/linux-yocto' % cls.layername)
+        cls.recipes_linuxyocto_dir = os.path.join \
+            (cls.builddir, cls.layername, 'recipes-kernel', 'linux', 'linux-yocto')
+        cls.recipeskernel_dir = os.path.dirname(cls.recipes_linuxyocto_dir)
+        runCmd('bitbake-layers add-layer %s' % cls.layername)
+
+    @classmethod
+    def tearDownClass(cls):
+        runCmd('bitbake-layers remove-layer %s' % cls.layername, ignore_status=True)
+        runCmd('rm -rf %s' % cls.layername)
+        super(KernelDev, cls).tearDownClass()
+
+    def setUp(self):
+        super(KernelDev, self).setUp()
+        self.set_machine_config('MACHINE = "qemux86-64"\n')
+
+    def test_apply_patches(self):
+        """
+        Summary:     Able to apply a single patch to the Linux kernel source
+        Expected:    The README file should exist and the patch changes should be
+                     displayed at the end of the file.
+        Product:     Kernel Development
+        Author:      Yeoh Ee Peng <ee.peng.yeoh at intel.com>
+        AutomatedBy: Mazliana Mohamad <mazliana.mohamad at intel.com>
+        """
+        runCmd('bitbake virtual/kernel -c patch')
+        kernel_source = get_bb_var('STAGING_KERNEL_DIR')
+        readme = os.path.join(kernel_source, 'README')
+
+        # This test step adds modified file 'README' to git and creates a
+        # patch file '0001-KERNEL_DEV_TEST_CASE.patch' at the same location as file
+        patch_content = 'This is a test to apply a patch to the kernel'
+        with open(readme, 'a+') as f:
+            f.write(patch_content)
+        repo = GitRepo('%s' % kernel_source, is_topdir=True)
+        repo.run_cmd('add %s' % readme)
+        repo.run_cmd(['commit', '-m', 'KERNEL_DEV_TEST_CASE'])
+        repo.run_cmd(['format-patch', '-1'])
+        patch_name = '0001-KERNEL_DEV_TEST_CASE.patch'
+        patchpath = os.path.join(kernel_source, patch_name)
+        runCmd('mv %s %s' % (patchpath, self.recipes_linuxyocto_dir))
+        runCmd('rm %s ' % readme)
+        self.assertFalse(os.path.exists(readme))
+
+        recipe_append = os.path.join(self.recipeskernel_dir, 'linux-yocto_%.bbappend')
+        with open(recipe_append, 'w+') as fh:
+            fh.write('SRC_URI += "file://%s"\n' % patch_name)
+            fh.write('FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"')
+
+        runCmd('bitbake virtual/kernel -c clean')
+        runCmd('bitbake virtual/kernel -c patch')
+        self.assertTrue(os.path.exists(readme))
+        result = runCmd('tail -n 1 %s' % readme)
+        self.assertEqual(result.output, patch_content)

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