check_all_key_are_valid function test added

Also fix typo here(unvalid => invalid)

bloom/generators/common.py

@@ -841,7 +841,7 @@ def _check_all_keys_are_valid(self, peer_packages, rosdistro):
                     all_keys_valid = False
         return all_keys_valid
 
-    def _pre_modify(self, key_unvalid_error_msg):
+    def check_all_keys_are_valid(self, key_invalid_error_msg):
         info("\nPre-verifying {0} dependency keys...".format(self.package_manager))
         # Run rosdep update is needed
         if not self.has_run_rosdep:
@@ -850,7 +850,7 @@ def _pre_modify(self, key_unvalid_error_msg):
         peer_packages = [p.name for p in self.packages.values()]
 
         while not self._check_all_keys_are_valid(peer_packages, self.rosdistro):
-            error(key_unvalid_error_msg)
+            error(key_invalid_error_msg)
             try:
                 if not maybe_continue(msg="Would you like to try again?"):
                     error("User aborted after rosdep keys were not resolved.")

bloom/generators/debian/generator.py

@@ -179,7 +179,7 @@ def pre_modify(self):
             "Some of the dependencies for packages in this repository could not be resolved by rosdep.\n",
             "You can try to address the issues which appear above and try again if you wish."
         ])
-        PackageManagerGenerator._pre_modify(self, error_msg)
+        PackageManagerGenerator.check_all_keys_are_valid(self, error_msg)
 
     def generate_package(self, package, os_version):
         info("Generating {0} for {1}...".format(self.package_manager, os_version))

bloom/generators/rpm/generator.py

@@ -108,7 +108,7 @@ def pre_modify(self):
             "You can try to address the issues which appear above and try again if you wish, ",
             "or continue without releasing into RPM-based distributions (e.g. Fedora 24)."
         ])
-        PackageManagerGenerator._pre_modify(self, error_msg)
+        PackageManagerGenerator.check_all_keys_are_valid(self, error_msg)
 
         for package in self.packages.values():
             if not package.licenses or not package.licenses[0]:

test/unit_tests/test_generators/test_common/test_generator.py

@@ -170,3 +170,19 @@ def dir_exist_default(data):
             assert content == placed_files_dict[f]
         for f in data.original_normal_files:
             assert f in placed_files_dict.keys()
+
+
+def test_bad_dependency():
+    bad_pkg_name = 'bad_dependency_pkg'
+    bad_pkg = get_package(bad_pkg_name)
+    pkg_bad_dict = {bad_pkg_name: bad_pkg}
+
+    gen = get_generator()
+    gen.packages = pkg_bad_dict
+    gen.rosdistro = 'kinetic'
+    gen.os_name = 'ubuntu'
+    gen.distros = ['xenial']
+    with bloom_answer(['n']):
+        with AssertRaisesContext(SystemExit, str(code.GENERATOR_NO_ROSDEP_KEY_FOR_DISTRO)):
+            with redirected_stdio():
+                gen.check_all_keys_are_valid("")