Add par_test

This test adds a number of checks for the visible python state inside a
hermetic par file.

Test: build/soong/python/tests/runtests.sh
Change-Id: I7188d862a309a09623169e1f967bde86707d41af

python/tests/Android.bp

@@ -0,0 +1,32 @@
+// Copyright 2019 Google Inc. 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.
+
+python_test_host {
+    name: "par_test",
+    main: "par_test.py",
+    srcs: [
+        "par_test.py",
+        "testpkg/par_test.py",
+    ],
+
+    version: {
+        py2: {
+            enabled: true,
+            embedded_launcher: true,
+        },
+        py3: {
+            enabled: false,
+        },
+    },
+}

python/tests/par_test.py

@@ -0,0 +1,50 @@
+# Copyright 2019 Google Inc. 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.
+
+import os
+import site
+import sys
+
+# This file checks the visible python state against expected values when run
+# inside a hermetic par file.
+
+failed = False
+def assert_equal(what, a, b):
+    global failed
+    if a != b:
+        print("Expected %s('%s') == '%s'" % (what, a, b))
+        failed = True
+
+assert_equal("__name__", __name__, "__main__")
+assert_equal("os.path.basename(__file__)", os.path.basename(__file__), "par_test.py")
+
+archive = os.path.dirname(__file__)
+
+assert_equal("__package__", __package__, "")
+assert_equal("sys.argv[0]", sys.argv[0], archive)
+assert_equal("sys.executable", sys.executable, None)
+assert_equal("sys.exec_prefix", sys.exec_prefix, archive)
+assert_equal("sys.prefix", sys.prefix, archive)
+assert_equal("__loader__.archive", __loader__.archive, archive)
+assert_equal("site.ENABLE_USER_SITE", site.ENABLE_USER_SITE, None)
+
+assert_equal("len(sys.path)", len(sys.path), 3)
+assert_equal("sys.path[0]", sys.path[0], archive)
+assert_equal("sys.path[1]", sys.path[1], os.path.join(archive, "internal"))
+assert_equal("sys.path[2]", sys.path[2], os.path.join(archive, "internal", "stdlib"))
+
+if failed:
+    sys.exit(1)
+
+import testpkg.par_test

python/tests/runtest.sh

@@ -0,0 +1,39 @@
+#!/bin/bash -e
+#
+# Copyright 2019 Google Inc. 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.
+
+#
+# This is just a helper to run the tests under a few different environments
+#
+
+if [ -z $ANDROID_HOST_OUT ]; then
+  echo "Must be run after running lunch"
+  exit 1
+fi
+
+if [ ! -f $ANDROID_HOST_OUT/nativetest64/par_test/par_test ]; then
+  echo "Run 'm par_test' first"
+  exit 1
+fi
+
+export LD_LIBRARY_PATH=$ANDROID_HOST_OUT/lib64
+
+set -x
+
+PYTHONHOME= PYTHONPATH= $ANDROID_HOST_OUT/nativetest64/par_test/par_test
+PYTHONHOME=/usr $ANDROID_HOST_OUT/nativetest64/par_test/par_test
+PYTHONPATH=/usr $ANDROID_HOST_OUT/nativetest64/par_test/par_test
+
+echo "Passed!"

python/tests/testpkg/par_test.py

@@ -0,0 +1,37 @@
+# Copyright 2018 Google Inc. 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.
+
+import os
+import sys
+
+# This file checks the visible python state against expected values when run
+# inside a hermetic par file.
+
+failed = False
+def assert_equal(what, a, b):
+    global failed
+    if a != b:
+        print("Expected %s('%s') == '%s'" % (what, a, b))
+        failed = True
+
+archive = sys.modules["__main__"].__loader__.archive
+
+assert_equal("__name__", __name__, "testpkg.par_test")
+assert_equal("__file__", __file__, os.path.join(archive, "testpkg/par_test.py"))
+assert_equal("__package__", __package__, "testpkg")
+assert_equal("__loader__.archive", __loader__.archive, archive)
+assert_equal("__loader__.prefix", __loader__.prefix, "testpkg/")
+
+if failed:
+    sys.exit(1)