gpperfmon: Add behave test for log_alert_history

Signed-off-by: NMarbin Tan <mtan@pivotal.io>
Signed-off-by: NC.J. Jameson <cjameson@pivotal.io>

gpMgmt/test/behave/mgmt_utils/gpperfmon.feature

@@ -63,6 +63,16 @@ Feature: gpperfmon
         When the user truncates "system_history" tables in "gpperfmon"
         Then wait until the results from boolean sql "SELECT count(*) > 0 FROM system_history" is "true"
 
+    @gpperfmon_log_alert_history
+    Scenario: gpperfmon adds to log_alert_history table
+        Given gpperfmon is configured and running in qamode
+        When the user truncates "log_alert_history" tables in "gpperfmon"
+        And the user runs "psql non_existing_database"
+        Then psql should return a return code of 2
+        When the latest gpperfmon gpdb-alert log is copied to a file with a fake (earlier) timestamp
+        Then wait until the results from boolean sql "SELECT count(*) > 0 FROM log_alert_history" is "true"
+        And the file with the fake timestamp no longer exists
+
     @gpperfmon_segment_history
     Scenario: gpperfmon adds to segment_history table
         Given gpperfmon is configured and running in qamode

gpMgmt/test/behave/mgmt_utils/steps/mgmt_utils.py

@@ -12,7 +12,6 @@ import tarfile
 import thread
 import json
 import csv
-import glob
 import subprocess
 import commands
 
@@ -4875,3 +4874,25 @@ def impl(context):
             Then wait until the process "gpmmon" is up
             And wait until the process "gpsmon" is up
         ''')
+
+
+@given('the latest gpperfmon gpdb-alert log is copied to a file with a fake (earlier) timestamp')
+@when('the latest gpperfmon gpdb-alert log is copied to a file with a fake (earlier) timestamp')
+def impl(context):
+    gpdb_alert_file_path_src = sorted(glob.glob(os.path.join(os.getenv("MASTER_DATA_DIRECTORY"),
+                                    "gpperfmon",
+                                       "logs",
+                                       "gpdb-alert*")))[-1]
+    # typical filename would be gpdb-alert-2017-04-26_155335.csv
+    # setting the timestamp to a string that starts with `-` (em-dash)
+    #   will be sorted (based on ascii) before numeric timestamps
+    #   without colliding with a real timestamp
+    dest = re.sub(r"_\d{6}\.csv$", "_-takeme.csv", gpdb_alert_file_path_src)
+    shutil.copy(gpdb_alert_file_path_src, dest)
+    context.fake_timestamp_file = dest
+
+
+@then('the file with the fake timestamp no longer exists')
+def impl(context):
+    if os.path.exists(context.fake_timestamp_file):
+        raise Exception("expected no file at: %s" % context.fake_timestamp_file)