Also check that it doesn't update PS1 when it shouldn't

Author: ocaisa

.github/workflows/scripts/test_init_scripts.sh

@@ -142,8 +142,10 @@ for shell in ${SHELLS[@]}; do
     if [ "$shell" = "bash" ] || [ "$shell" = "ksh" ] || [ "$shell" = "zsh" ]; then
         # Typically this is a non-interactive shell, so manually set PS1 when testing
         TEST_EESSI_PS1_UPDATE=$($shell -c "PS1='$ ' ; source init/lmod/$shell 2>/dev/null ; echo \"\$PS1\"")
-        pattern="{EESSI/${EESSI_VERSION}}"
+        TEST_EESSI_NO_PS1_UPDATE=$($shell -c "source init/lmod/$shell 2>/dev/null ; echo \"\$PS1\"")
+        pattern="{EESSI/${EESSI_VERSION}} "
         assert_raises 'echo "$TEST_EESSI_PS1_UPDATE" | grep "$pattern"'
+        assert_raises 'echo "$TEST_EESSI_NO_PS1_UPDATE" | grep "$pattern"' 1
     fi
 
     # End Test Suite