test: add automation framework and sanitytest

Automation test is disabled by default. User need set TESTCLASS
to qemu in conf/local.conf and run bitbake command "bitbake
poky-image-xxx" or "bitbake poky-image-xxx -c qemuimagetest" to
trigger it. Currently only the sanity test with two testcases are
added.

To run the test, user need prepare a testing environment:
1) "expect" should be installed on system
2) NOPASSWD should be set for user to run bitbake

Signed-off-by Jiajun Xu <jiajun.xu@intel.com>

meta/classes/image.bbclass

@@ -1,5 +1,8 @@
 inherit rootfs_${IMAGE_PKGTYPE}
 
+IMAGETEST ?= "dummy"
+inherit imagetest-${IMAGETEST}
+
 LICENSE = "MIT"
 PACKAGES = ""
 RDEPENDS += "${IMAGE_INSTALL}"

meta/classes/imagetest-dummy.bbclass

@@ -0,0 +1 @@
+# dummy testclass file

meta/classes/imagetest-qemu.bbclass

@@ -0,0 +1,137 @@
+addtask qemuimagetest before do_build
+# after do_rootfs
+do_qemuimagetest[nostamp] = "1"
+do_qemuimagetest[depends] += "qemu-native:do_populate_sysroot"
+
+# Test related variables
+# By default, TEST_DIR is created under WORKDIR
+TEST_DIR ?= "${WORKDIR}/qemuimagetest"
+TEST_LOG ?= "${LOG_DIR}/qemuimagetests"
+TEST_RESULT ?= "${TEST_DIR}/result"
+TEST_LIST ?= "${TEST_DIR}/list"
+TEST_TMP ?= "${TEST_DIR}/tmp"
+TEST_SCEN ?= "sanity"
+
+python do_qemuimagetest() {
+    import sys
+    import re
+    import os
+    
+    """
+    Test Controller for Poky Testing.
+    """
+    
+    casestr = re.compile(r'(?P<scen>\w+\b)\s*(?P<case>\w+$)')
+    resultstr = re.compile(r'\s*(?P<case>\w+)\s*(?P<pass>\d+)\s*(?P<fail>\d+)\s*(?P<noresult>\d+)')
+    
+    """funtion to run each case under scenario"""
+    def runtest(scen, case, fulltestpath):
+        resultpath = bb.data.getVar('TEST_RESULT', d, 1)
+        machine = bb.data.getVar('MACHINE', d, 1)
+        pname = bb.data.getVar('PN', d, 1)
+
+        testpath = bb.data.getVar('TEST_DIR', d, 1)
+
+        """initialize log file for testcase"""
+        logpath = bb.data.getVar('TEST_LOG', d, 1)
+        bb.utils.mkdirhier("%s/%s" % (logpath, scen))
+        caselog = os.path.join(logpath, "%s/log_%s.%s" % (scen, case, bb.data.getVar('DATETIME', d, 1)))
+        os.system("touch %s" % caselog)
+        
+
+        """export TEST_TMP, TEST_RESULT, DEPLOY_DIR and QEMUARCH"""
+        os.environ["PATH"] = bb.data.getVar("PATH", d, True)
+        os.environ["TEST_TMP"] = testpath
+        os.environ["TEST_RESULT"] = resultpath
+        os.environ["DEPLOY_DIR"] = bb.data.getVar("DEPLOY_DIR", d, True)
+        os.environ["QEMUARCH"] = machine
+        os.environ["QEMUTARGET"] = pname
+        os.environ["DISPLAY"] = bb.data.getVar("DISPLAY", d, True)
+
+        """run Test Case"""
+        bb.note("Run %s test in scenario %s" % (case, scen))
+        os.system("%s | tee -a %s" % (fulltestpath, caselog))
+    
+    """Generate testcase list in runtime"""
+    def generate_list(testfile, testlist):
+        list = []
+        if len(testlist) == 0:
+            raise bb.build.FuncFailed("No testcase defined in TEST_SCEN")
+
+        """remove old testcase list file"""
+        if os.path.exists(testfile):
+            os.remove(testfile)
+        os.system("touch %s" % testfile)
+
+        """check testcase folder and add case to TEST_LIST"""
+        for item in testlist.split(" "):
+            found = False
+            for dir in bb.data.getVar("QEMUIMAGETESTS", d, True).split():
+                casepath = os.path.join(dir, item)
+                if not os.path.isdir(casepath):
+                    continue
+                files = os.listdir(casepath)
+                for casefile in files:
+                    fulltestcase = "%s/%s" % (casepath, casefile)
+                    if os.path.isfile(fulltestcase):
+                        list.append((item, casefile, fulltestcase))
+                    found = True
+            if not found:
+                raise bb.build.FuncFailed("Testcase folder not found for test %s" % item)
+        return list
+
+    """check testcase folder and create test log folder"""
+    testpath = bb.data.getVar('TEST_DIR', d, 1)
+    bb.utils.mkdirhier(testpath)
+    
+    logpath = bb.data.getVar('TEST_LOG', d, 1)
+    bb.utils.mkdirhier(logpath)
+
+    tmppath = bb.data.getVar('TEST_TMP', d, 1)
+    bb.utils.mkdirhier(tmppath)
+    
+    """initialize result file"""
+    resultpath = bb.data.getVar('TEST_RESULT', d, 1)
+    bb.utils.mkdirhier(resultpath)
+    resultfile = os.path.join(resultpath, "testresult.%s" % bb.data.getVar('DATETIME', d, 1))
+    sresultfile = os.path.join(resultpath, "testresult.log")
+
+    machine = bb.data.getVar('MACHINE', d, 1)
+
+    if os.path.exists(sresultfile):
+        os.remove(sresultfile)
+    os.system("touch %s" % resultfile)
+    os.symlink(resultfile, sresultfile)
+    f = open(sresultfile, "a")
+    f.write("\tTest Result for %s\n" % machine)
+    f.write("\tTestcase\tPASS\tFAIL\tNORESULT\n")
+    f.close()
+    
+    """generate pre-defined testcase list"""
+    testfile = bb.data.getVar('TEST_LIST', d, 1)
+    testlist = bb.data.getVar('TEST_SCEN', d, 1)
+    fulllist = generate_list(testfile, testlist)
+
+    """Begin testing"""
+    for test in fulllist:
+        (scen, case, fullpath) = test
+        runtest(scen, case, fullpath)
+    
+    """Print Test Result"""
+    ret = 0
+    f = open(sresultfile, "r")
+    for line in f:
+        m = resultstr.match(line)
+        if m:
+            if m.group('fail') == "1":
+                ret = 1
+            elif m.group('noresult') == "1":
+                ret = 2
+            print line,
+        else:
+            print line,
+    f.close()
+
+    if ret != 0:
+        raise bb.build.FuncFailed("Some testcases fail, pls. check test result and test log!!!")
+}