add sanity check

eessi/testsuite/eessi_staging.py

@@ -1,5 +1,8 @@
+from pathlib import Path
+
 import reframe as rfm
 from reframe.utility import sanity as sn
+from reframe.core.builtins import run_after, sanity_function
 
 
 @rfm.simple_test
@@ -10,4 +13,20 @@ class EESSI_Staging(rfm.RunOnlyRegressionTest):
     valid_prog_environs = ['*']
     executable = "true"
     local = True
-    sanity_patterns = sn.assert_true(True)
+
+    @run_after('init')
+    def remove_modules(self):
+        self.modules = []
+
+    @sanity_function
+    def check_stagedir(self):
+        ignore = {'rfm_job.sh', 'rfm_job.out', 'rfm_job.err'}
+        sourcepath = Path(self.sourcesdir)
+        sourcefiles = {x.relative_to(sourcepath).as_posix() for x in sourcepath.rglob('*')}
+        stagepath = Path(self.stagedir)
+        stagefiles = {x.relative_to(stagepath).as_posix() for x in stagepath.rglob('*')} - ignore
+
+        return sn.assert_eq(
+            sourcefiles, stagefiles,
+            f'sourcesdir {self.sourcesdir} and stagedir {self.stagedir} do not have the same contents'
+        )