enhance test for cmd.sh script produced by run_shell_cmd to verify th…

…at 'module' function is available

.github/workflows/unit_tests.yml

@@ -152,7 +152,9 @@ jobs:
           cd $HOME
           # initialize environment for modules tool
           if [ -f $HOME/moduleshome ]; then export MODULESHOME=$(cat $HOME/moduleshome); fi
-          source $(cat $HOME/mod_init); type module
+          source $(cat $HOME/mod_init)
+          type module
+          module --version
           # make sure 'eb' is available via $PATH, and that $PYTHONPATH is set (some tests expect that);
           # also pick up changes to $PATH set by sourcing $MOD_INIT
           export PREFIX=/tmp/$USER/$GITHUB_SHA

test/framework/run.py

@@ -52,6 +52,7 @@
 from easybuild.tools.build_log import EasyBuildError, init_logging, stop_logging
 from easybuild.tools.config import update_build_option
 from easybuild.tools.filetools import adjust_permissions, change_dir, mkdir, read_file, remove_dir, write_file
+from easybuild.tools.modules import EnvironmentModules, Lmod
 from easybuild.tools.run import RunShellCmdResult, RunShellCmdError, check_async_cmd, check_log_for_errors
 from easybuild.tools.run import complete_cmd, fileprefix_from_cmd, get_output_from_process, parse_log_for_error
 from easybuild.tools.run import run_cmd, run_cmd_qa, run_shell_cmd, subprocess_terminate
@@ -233,6 +234,20 @@ def test_run_shell_cmd_basic(self):
         pwd = res[0].strip()[5:]
         self.assertTrue(os.path.samefile(pwd, self.test_prefix))
 
+        cmd = f"{cmd_script} -c 'module --version'"
+        with self.mocked_stdout_stderr():
+            res = run_shell_cmd(cmd, fail_on_error=False)
+        self.assertEqual(res.exit_code, 0)
+
+        if isinstance(self.modtool, Lmod):
+            regex = re.compile("^Modules based on Lua", re.M)
+        elif isinstance(self.modtool, EnvironmentModules):
+            regex = re.compile("xxx", re.M)
+        else:
+            regex = re.compile("", re.M)
+
+        self.assertTrue(regex.search(res.output), f"Pattern '{regex.pattern}' should be found in {res.output}")
+
         # test running command that emits non-UTF-8 characters
         # this is constructed to reproduce errors like:
         # UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe2