use .test instead of _test

Author: dougthor42

python/private/pypi/pip_compile.bzl

@@ -47,7 +47,7 @@ def pip_compile(
 
     It also generates two targets for running pip-compile:
 
-    - validate with `bazel test [name]_test`
+    - validate with `bazel test [name].test`
     - update with   `bazel run [name].update`
 
     If you are using a version control system, the requirements.txt generated by this rule should
@@ -166,7 +166,7 @@ def pip_compile(
     timeout = kwargs.pop("timeout", "short")
 
     py_test(
-        name = name + "_test",
+        name = name + ".test",
         timeout = timeout,
         # setuptools (the default python build tool) attempts to find user
         # configuration in the user's home direcotory. This seems to work fine on
@@ -180,3 +180,9 @@ def pip_compile(
         # kwargs could contain test-specific attributes like size
         **dict(attrs, **kwargs)
     )
+
+    alias(
+        name = "{}_test".format(name),
+        actual = ":{}.test".format(name),
+        deprecation = "Use '{}.test' instead. The '*_test' target will be removed in the next major release.".format(name),
+    )