Acceptance test: override immutable bit with perms

Added acceptance test to test that the perms attribute of the files
promise can override the immutable bit of the destination file.

For some reason it just works. I don't know why? Maybe it was indirectly
fixed by previous commits?. IDK. But hey! It's Friday at 3:24 pm, so I
will not ask any further questions. Instead, I'll add a changelog string
in this commit and pretend that I intentionally fixed it.

Ticket: ENT-10961, CFE-1840
Changelog: The perms attribute of the files promise can now override the immutable bit.
Signed-off-by: Lars Erik Wik <lars.erik.wik@northern.tech>

Author: larsewi

tests/acceptance/10_files/14_immutable/immutable_07.cf

@@ -0,0 +1,79 @@
+##############################################################################
+#
+# Test that agent can override the immutable bit when using edit_xml attribute
+#
+##############################################################################
+
+body common control
+{
+  inputs => { "../../default.cf.sub" };
+  bundlesequence  => { default("$(this.promise_filename)") };
+  version => "1.0";
+}
+
+body fsattrs set_immutable
+{
+  immutable => "true";
+}
+
+bundle agent init
+{
+  files:
+    "/tmp/immutable_07.txt"
+      create => "true",
+      perms => m("600");
+
+  commands:
+    "chattr +i /tmp/immutable_07.txt"
+      contain => in_shell;
+}
+
+bundle agent test
+{
+  meta:
+    "description" -> { "CFE-1840", "ENT-10961" }
+      string => "Test that agent can override the immutable bit on a file while using the perms attribute";
+
+    "test_soft_fail"
+      string => "hpux|aix|windows",
+      meta => { "CFE-1840", "ENT-10961" };
+
+  files:
+    "/tmp/immutable_07.txt"
+      fsattrs => set_immutable,
+      perms => m("644");
+}
+
+bundle agent check
+{
+  vars:
+    "expected"
+      string => "644";
+    "actual"
+      string => string_tail(filestat("/tmp/immutable_07.txt", "modeoct"), "3");
+
+  classes:
+    "ok"
+      expression => strcmp("$(actual)", "$(expected)");
+
+  reports:
+    ok::
+      "$(this.promise_filename) Pass";
+    !ok::
+      "$(this.promise_filename) FAIL";
+    any::
+      "Expected: '$(expected)', actual: '$(actual)'";
+}
+
+bundle agent destroy
+{
+  commands:
+    "chattr -i /tmp/immutable_07.txt"
+      contain => in_shell,
+      handle => "is mutable";
+
+  files:
+    "/tmp/immutable_07.txt"
+      delete => tidy,
+      depends_on => { "is mutable" };
+}