Added stress test for launching app to detect CEF initialization fail…

…ure on Linux. See Issue 131.

cefpython/cef3/wx-subpackage/examples/sample2.py

@@ -11,6 +11,8 @@
 import wx
 import wx.lib.agw.flatnotebook as fnb
 import cefpython3.wx.chromectrl as chrome
+import platform
+import sys
 
 ROOT_NAME = "My Locations"
 
@@ -32,6 +34,14 @@ def __init__(self):
         self.initComponents()
         self.layoutComponents()
         self.initEventHandlers()
+        if len(sys.argv) == 2 and sys.argv[1] == "test-launch":
+            wx.CallLater(500, self.testLaunch)
+
+    def testLaunch(self):
+        # This hash is checked by /tests/test-launch.sh script
+        # to detect whether CEF initialized successfully.
+        print("b8ba7d9945c22425328df2e21fbb64cd")
+        self.Close()
 
     def initComponents(self):
         self.tree = wx.TreeCtrl(self, id=-1, size=(200, -1))
@@ -73,8 +83,16 @@ def OnPageClosing(self, event):
     def OnClose(self, event):
         self.Destroy()
 
+
 if __name__ == '__main__':
     chrome.Initialize()
+    if platform.system() == "Linux":
+        # CEF initialization fails intermittently on Linux during
+        # launch of a subprocess (Issue 131). The solution is
+        # to offload cpu for half a second after Initialize
+        # has returned (it still runs some stuff in its thread).
+        import time
+        time.sleep(0.5)
     print('sample2.py: wx.version=%s' % wx.version())
     app = wx.PySimpleApp()
     MainFrame().Show()

cefpython/tests/test-launch.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+# Usage: ./test-launch.sh 500
+
+# When launching this test script more than once in current
+# Linux session then the CEF initialization issue is hard
+# to reproduce. The best results are when launching tests
+# in a clean Ubuntu session, just log out and log in again,
+# and run the test immediately. You could also run a few
+# terminal sessions with several test scripts running
+# simultaneously to simulate heavy overload.
+
+for ((i = 1; i <= $1; i++)); do
+    output=$(python ./../cef3/wx-subpackage/examples/sample2.py test-launch)
+    code=$?
+    if [[ $code != 0 || $output != *b8ba7d9945c22425328df2e21fbb64cd* ]]; then
+        echo "EXIT CODE: $code"
+        echo "OUTPUT: $output"
+        echo "ERROR!"
+        read -p "Press ENTER to exit"
+        exit $code
+    fi
+    echo RUN $i OK    
+done
+
+echo TEST SUCCEEDED
+read -p "Press ENTER to exit"