oeqa/runtime: Add OERequirePackage decorator

Add new decorator which behaves like OEHasPackage, but
fails the testcase if a dependency isn't met.

This helps to identify missing packages in the image
under test when using static test suite lists, otherwise
a missing package won't fail the overall test suite and
errors might slip through unnoticed

(From OE-Core rev: c5be39df1494f33e2cae116e4930f2a0f3dd2000)

Signed-off-by: Konrad Weihmann <kweihmann@outlook.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

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

@@ -46,11 +46,41 @@ class OEHasPackage(OETestDecorator):
             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)
+                self._decorator_fail(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)
+                self._decorator_fail(msg)
+
+    def _decorator_fail(self, msg):
+        self.case.skipTest(msg)
+
+@registerDecorator
+class OERequirePackage(OEHasPackage):
+    """
+        Checks if image has packages (un)installed.
+        It is almost the same as OEHasPackage, but if dependencies are missing
+        the test case fails.
+
+        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:
+        @OERequirePackage({'pkg1', 'pkg2'})
+
+        If test depends on pkg1 and pkg2 you need to use:
+        @OERequirePackage('pkg1')
+        @OERequirePackage('pkg2')
+
+        If test depends on pkg1 but pkg2 must not be present use:
+        @OERequirePackage({'pkg1', '!pkg2'})
+    """
+
+    def _decorator_fail(self, msg):
+        self.case.fail(msg)