test: minimal test for zodb analyze command

zodbtools/test/test_analyze.py

+# Copyright (C) 2019 Nexedi SA and Contributors.
+#
+# This program is free software: you can Use, Study, Modify and Redistribute
+# it under the terms of the GNU General Public License version 3, or (at your
+# option) any later version, as published by the Free Software Foundation.
+#
+# You can also Link and Combine this program with other software covered by
+# the terms of any of the Free Software licenses or any of the Open Source
+# Initiative approved licenses and Convey the resulting work. Corresponding
+# source of such a combination shall include the source code for all other
+# software used.
+#
+# This program is distributed WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+#
+# See COPYING file for full licensing terms.
+# See https://www.nexedi.com/licensing for rationale and options.
+
+from zodbtools.zodbanalyze import analyze, report
+import os.path
+
+
+def test_zodbanalyze(capsys):
+    for use_dbm in (False, True):
+        report(
+            analyze(
+                os.path.join(os.path.dirname(__file__), "testdata", "1.fs"),
+                use_dbm=use_dbm,
+                delta_fs=False,
+                tidmin=None,
+                tidmax=None,
+            ),
+            csv=False,
+        )
+        captured = capsys.readouterr()
+        assert "Processed 68 records in 59 transactions" in captured.out
+        assert captured.err == ""
+
+    # csv output
+    report(
+        analyze(
+            os.path.join(os.path.dirname(__file__), "testdata", "1.fs"),
+            use_dbm=False,
+            delta_fs=False,
+            tidmin=None,
+            tidmax=None,
+        ),
+        csv=True,
+    )
+    captured = capsys.readouterr()
+    assert (
+        """Class Name,T.Count,T.Bytes,Pct,AvgSize,C.Count,C.Bytes,O.Count,O.Bytes
+persistent.mapping.PersistentMapping,10,1578,45.633314%,157.800000,1,213,9,1365
+__main__.Object,56,1880,54.366686%,33.571429,9,303,47,1577
+"""
+        == captured.out
+    )
+    assert captured.err == ""