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import pytest
import os
import tempfile
import subprocess
from python_framework import CMD_helper
from python_framework import Huge_page_organizer

class Test_trace_mechanism(object):
    binary = "../trace_mechanism_test_helper"
    fail_msg = "Test failed with:\n {0}"
    debug_env = "MEMKIND_DEBUG=1 "
    cmd_helper = CMD_helper()

    def test_TC_MEMKIND_logging_MEMKIND_HBW(self):
        #This test executes trace_mechanism_test_helper and test if MEMKIND_INFO message occurs while calling MEMKIND_HBW
        command = self.debug_env + self.cmd_helper.get_command_path(self.binary) + " MEMKIND_HBW"
        print "Executing command: {0}".format(command)
        output, retcode = self.cmd_helper.execute_cmd(command, sudo=False)
        assert retcode == 0, self.fail_msg.format("\nError: trace_mechanism_test_helper returned {0} \noutput: {1}".format(retcode,output))
        assert "MEMKIND_INFO: NUMA node" in output, self.fail_msg.format("\nError: trace mechanism in memkind doesn't show MEMKIND_INFO message \noutput: {0}").format(output)

    def test_TC_MEMKIND_2MBPages_logging_MEMKIND_HUGETLB(self):
        huge_page_organizer = Huge_page_organizer(8)
        #This test executes trace_mechanism_test_helper and test if MEMKIND_INFO message occurs while calling MEMKIND_HUGETLB
        command = self.debug_env + self.cmd_helper.get_command_path(self.binary) + " MEMKIND_HUGETLB"
        print "Executing command: {0}".format(command)
        output, retcode= self.cmd_helper.execute_cmd(command, sudo=False)
        assert retcode == 0, self.fail_msg.format("\nError: trace_mechanism_test_helper returned {0} \noutput: {1}".format(retcode,output))
        assert "MEMKIND_INFO: Number of" in output, self.fail_msg.format("\nError: trace mechanism in memkind doesn't show MEMKIND_INFO message \noutput: {0}").format(output)
        assert "MEMKIND_INFO: Overcommit limit for" in output, self.fail_msg.format("\nError: trace mechanism in memkind doesn't show MEMKIND_INFO message \n output: {0}").format(output)

    def test_TC_MEMKIND_logging_negative_MEMKIND_DEBUG_env(self):
        #This test executes trace_mechanism_test_helper and test if setting MEMKIND_DEBUG to wrong value causes MEMKIND_WARNING message
        command = "MEMKIND_DEBUG=-1 " + self.cmd_helper.get_command_path(self.binary) + " MEMKIND_HBW"
        print "Executing command: {0}".format(command)
        output, retcode = self.cmd_helper.execute_cmd(command, sudo=False)
        assert retcode == 0, self.fail_msg.format("\nError: trace_mechanism_test_helper returned {0} \noutput: {1}".format(retcode,output))
        assert "MEMKIND_WARNING: debug option" in output, self.fail_msg.format("\nError: setting wrong MEMKIND_DEBUG environment variable doesn't show MEMKIND_WARNING \noutput: {0})").format(output)