testing/tests/package/test_python: add TestPython3

Add Python3 version of TestPython2 to make sure both versions of
Python get unit-tested.

Modify the code of libc_time_test() to support that change (convert
the code to use Python3-style "print").

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
[Thomas: update .gitlab-ci.yml.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

.gitlab-ci.yml

@@ -227,6 +227,7 @@ tests.fs.test_ubi.TestUbi: *runtime_test
 tests.fs.test_yaffs2.TestYaffs2: *runtime_test
 tests.package.test_dropbear.TestDropbear: *runtime_test
 tests.package.test_python.TestPython2: *runtime_test
+tests.package.test_python.TestPython3: *runtime_test
 tests.toolchain.test_external.TestExternalToolchainBuildrootMusl: *runtime_test
 tests.toolchain.test_external.TestExternalToolchainBuildrootuClibc: *runtime_test
 tests.toolchain.test_external.TestExternalToolchainCtngMusl: *runtime_test

support/testing/tests/package/test_python.py

@@ -26,9 +26,10 @@ BR2_TARGET_ROOTFS_CPIO=y
         self.assertEqual(exit_code, 0)
 
     def libc_time_test(self):
-        cmd = "python -c 'import ctypes;"
+        cmd = "python -c 'from __future__ import print_function;"
+        cmd += "import ctypes;"
         cmd += "libc = ctypes.cdll.LoadLibrary(\"libc.so.1\");"
-        cmd += "print libc.time(None)'"
+        cmd += "print(libc.time(None))'"
         _, exit_code = self.emulator.run(cmd)
         self.assertEqual(exit_code, 0)
 
@@ -48,3 +49,15 @@ BR2_PACKAGE_PYTHON=y
         self.math_floor_test()
         self.libc_time_test()
         self.zlib_test()
+
+class TestPython3(TestPythonBase):
+    config = TestPythonBase.config + \
+"""
+BR2_PACKAGE_PYTHON3=y
+"""
+    def test_run(self):
+        self.login()
+        self.version_test("Python 3")
+        self.math_floor_test()
+        self.libc_time_test()
+        self.zlib_test()