Create a failure test rule

When testing for analysis-phase-failures in rules this rule provides
otherwise necessary boilerplate that simply allows to test for correct
Error messages

rules/failure_test.bzl

@@ -0,0 +1,36 @@
+# Copyright 2019 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""A rule that allows to test for failures of rules
+
+Allows to test for simple failures of rules and asserting the error message of the error.
+"""
+
+load("//lib:unittest.bzl", "analysistest", "asserts")
+
+def _failure_test_impl(ctx):
+    env = analysistest.begin(ctx)
+    asserts.expect_failure(env, expected_failure_msg = ctx.attr.error_message)
+    return analysistest.end(env)
+
+failure_test = analysistest.make(
+    _failure_test_impl,
+    expect_failure = True,
+    attrs = {
+        "error_message": attr.string(
+            mandatory = True,
+            doc = "The expected error message that is asserted",
+        ),
+    },
+)