1 files changed, 45 insertions, 0 deletions
diff --git a/go/private/tools/lines_sorted_test.bzl b/go/private/tools/lines_sorted_test.bzl
new file mode 100644
index 00000000..33861d3b
--- /dev/null
+++ b/go/private/tools/lines_sorted_test.bzl
@@ -0,0 +1,45 @@
+# Copyright 2016 The Bazel Go Rules Authors. All rights reserved.
+# Copyright 2016 The Closure Rules 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.
+
+load("//go/private/tools:files_equal_test.bzl", "files_equal_test")
+
+def lines_sorted_test(name, file, cmd = "cat $< >$@", visibility = None, **kwargs):
+    """Tests that lines within a file are sorted."""
+
+    native.genrule(
+        name = name + "_lines",
+        testonly = True,
+        srcs = [file],
+        outs = [name + "_lines.txt"],
+        cmd = cmd,
+        visibility = visibility,
+    )
+
+    native.genrule(
+        name = name + "_lines_sorted",
+        testonly = True,
+        srcs = [name + "_lines.txt"],
+        outs = [name + "_lines_sorted.txt"],
+        cmd = "sort $< >$@",
+        visibility = visibility,
+    )
+
+    files_equal_test(
+        name = name,
+        actual = name + "_lines.txt",
+        golden = name + "_lines_sorted.txt",
+        visibility = visibility,
+        **kwargs
+    )