test: add test for BindPaths= and BindReadOnlyPaths=

Follow-up for a8cabc612b.

test/meson.build

@@ -46,6 +46,7 @@ test_data_files = '''
         test-path/path-makedirectory.path
         test-path/path-modified.path
         test-path/path-unit.path
+        test-execute/exec-bind-paths.service
         test-execute/exec-environment-empty.service
         test-execute/exec-environment-multiple.service
         test-execute/exec-environment.service

test/test-execute/exec-bind-paths.service

@@ -0,0 +1,14 @@
+[Service]
+Type=oneshot
+# Create a file in /tmp/test-exec_bind_paths
+ExecStart=/bin/sh -c 'touch /tmp/test-exec_bind_paths/thisisasimpletest'
+# Then, the file can be access through /tmp
+ExecStart=/bin/sh -c 'test -f /tmp/thisisasimpletest'
+# Also, through /tmp/test-exec_bind_readonly_paths
+ExecStart=/bin/sh -c 'test -f /tmp/test-exec_bind_readonly_paths/thisisasimpletest'
+# The file cannot modify through /tmp/test-exec_bind_readonly_paths
+ExecStart=/bin/sh -x -c '! touch /tmp/test-exec_bind_readonly_paths/thisisasimpletest'
+# Cleanup
+ExecStart=/bin/sh -c 'rm /tmp/thisisasimpletest'
+BindPaths=/tmp:/tmp/test-exec_bind_paths
+BindReadOnlyPaths=/tmp:/tmp/test-exec_bind_readonly_paths