oeqa/runtime: Add OEHasPackage decorator

This new decorator will be used to skip the test
if the image under test doesn't have the required
packages installed.

[YOCTO #10234]

(From OE-Core rev: 021449938ff0b4d182d7f02930a80693f109c8ba)

Signed-off-by: Mariano Lopez <mariano.lopez@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/runtime/decorator/package.py

@@ -0,0 +1,53 @@
+# Copyright (C) 2016 Intel Corporation
+# Released under the MIT license (see COPYING.MIT)
+
+from oeqa.core.decorator import OETestDecorator, registerDecorator
+from oeqa.core.utils.misc import strToSet
+
+@registerDecorator
+class OEHasPackage(OETestDecorator):
+    """
+        Checks if image has packages (un)installed.
+
+        The argument must be a string, set, or list of packages that must be
+        installed or not present in the image.
+
+        The way to tell a package must not be in an image is using an
+        exclamation point ('!') before the name of the package.
+
+        If test depends on pkg1 or pkg2 you need to use:
+        @OEHasPackage({'pkg1', 'pkg2'})
+
+        If test depends on pkg1 and pkg2 you need to use:
+        @OEHasPackage('pkg1')
+        @OEHasPackage('pkg2')
+
+        If test depends on pkg1 but pkg2 must not be present use:
+        @OEHasPackage({'pkg1', '!pkg2'})
+    """
+
+    attrs = ('need_pkgs',)
+
+    def setUpDecorator(self):
+        need_pkgs = set()
+        unneed_pkgs = set()
+        pkgs = strToSet(self.need_pkgs)
+        for pkg in pkgs:
+            if pkg.startswith('!'):
+                unneed_pkgs.add(pkg[1:])
+            else:
+                need_pkgs.add(pkg)
+
+        if unneed_pkgs:
+            msg = 'Checking if %s is not installed' % ', '.join(unneed_pkgs)
+            self.logger.debug(msg)
+            if not self.case.tc.image_packages.isdisjoint(unneed_pkgs):
+                msg = "Test can't run with %s installed" % ', or'.join(unneed_pkgs)
+                self.case.skipTest(msg)
+
+        if need_pkgs:
+            msg = 'Checking if at least one of %s is installed' % ', '.join(need_pkgs)
+            self.logger.debug(msg)
+            if self.case.tc.image_packages.isdisjoint(need_pkgs):
+                msg = "Test requires %s to be installed" % ', or'.join(need_pkgs)
+                self.case.skipTest(msg)