test: add test using /usr/bin/env and PYTHONPATH

Author: Alvaro-Kothe

test cases/native/14 python command sequence/gen.py

@@ -0,0 +1,11 @@
+import argparse
+
+import codegen
+
+
+parser = argparse.ArgumentParser()
+parser.add_argument("output")
+args = parser.parse_args()
+
+with open(args.output, "w", encoding="utf-8") as f:
+    f.write(codegen.get_c_code())

test cases/native/14 python command sequence/lib/codegen.py

@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: Apache-2.0
+
+import textwrap
+
+def get_c_code():
+    return textwrap.dedent("""\
+        int im_going_back_to(void) {
+            return 505;
+        }
+        """)

test cases/native/14 python command sequence/meson.build

@@ -0,0 +1,18 @@
+project(
+    'python command sequence',
+    'c',
+    default_options: ['buildtype=release'],
+)
+
+py = import('python').find_installation(pure: false)
+
+ct = custom_target(
+  'ct',
+  input : 'gen.py',
+  output : 'ct.c',
+  command : [py, '@INPUT@', '@OUTPUT@'],
+)
+
+exe = executable('test_generated_code', ct, 'test_generated_code.c')
+
+test('runtest', exe)

test cases/native/14 python command sequence/test_generated_code.c

@@ -0,0 +1,9 @@
+int im_going_back_to(void);
+
+int main(void) {
+    if (im_going_back_to() == 505) {
+        return 0;
+    }
+
+    return 1;
+}

unittests/machinefiletests.py

@@ -273,6 +273,29 @@ def test_python_module(self):
                 raise SkipTest('Not running Python 2 tests because dev packages not installed.')
         self._simple_test('python', binary, entry='python')
 
+    @skipIf(is_windows(), '/usr/bin/env is not available on Windows')
+    def test_python_command_sequence(self):
+        testcase = Path(
+            self.src_root, 'test cases', 'native', '14 python command sequence'
+        )
+        codegen_lib = testcase / 'lib'
+
+        config = self.helper_create_native_file(
+            {
+                'binaries': {
+                    'python': [
+                        '/usr/bin/env',
+                        f'PYTHONPATH={codegen_lib}',
+                        'python3',
+                    ]
+                }
+            }
+        )
+
+        self.init(str(testcase), extra_args=['--native-file', config])
+        self.build()
+        self.run_tests()
+
     @skipIf(is_windows(), 'Setting up multiple compilers on windows is hard')
     @skip_if_env_set('CC')
     def test_c_compiler(self):