Ensure ZSH-related tests succeed when TERM variable is set to linux (#…

…497)

* Fix ZSH tests when TERM variable is set to linux

Running the test-suite with TERM=linux causes the ZSH related tests to
fail. Fixed by hardcoding TERM="" when running the ZSH tests.

Signed-off-by: Olivier Gayot <olivier.gayot@canonical.com>

* Also ensure zsh does not load global RC files when running test-suite

While bash only has a single option for disabling bashrc loading, ZSH
comes with two options: one for $HOME/.zshrc and one for the global
zshrc (typically located in /etc). Pass both options to avoid surprises.

Signed-off-by: Olivier Gayot <olivier.gayot@canonical.com>

---------

Signed-off-by: Olivier Gayot <olivier.gayot@canonical.com>

test/test.py

@@ -65,6 +65,7 @@ def run_command(self, command, **kwargs):
 
 def _repl_sh(command, args, non_printable_insert):
     os.environ["PS1"] = "$"
+    os.environ["TERM"] = ""
     child = pexpect.spawn(command, args, echo=False, encoding="utf-8")
     ps1 = PEXPECT_PROMPT[:5] + non_printable_insert + PEXPECT_PROMPT[5:]
     ps2 = PEXPECT_CONTINUATION_PROMPT[:5] + non_printable_insert + PEXPECT_CONTINUATION_PROMPT[5:]
@@ -79,7 +80,7 @@ def bash_repl(command="bash"):
 
 
 def zsh_repl(command="zsh"):
-    sh = _repl_sh(command, ["--no-rcs", "-V"], non_printable_insert="%(!..)")
+    sh = _repl_sh(command, ["--no-rcs", "--no-globalrcs", "-V"], non_printable_insert="%(!..)")
     # Require two tabs to print all options (some tests rely on this).
     sh.run_command("setopt BASH_AUTO_LIST")
     return sh