How to run a command as if it is called from cron

Here is how to do the other way around: forcing cron execution to use your login environment:

bash -lc "your_command"

From the bash manual:

-c string     If the -c option is present, then commands are read from string.
              If there are arguments after the string, they are assigned to the
               positional parameters, starting with $0.
-l            Make bash act as if it had been invoked as a login shell
               (see INVOCATION below).

INVOCATION (a bit stripped):

When bash is invoked as an interactive login shell, or as a non-interactive shell with the --login option, it first reads and executes commands from the file /etc/profile, if that file exists. After reading that file, it looks for ~/.bash_profile, ~/.bash_login, and ~/.profile, in that order, and reads and executes commands from the first one that exists and is readable. The --noprofile option may be used when the shell is started to inhibit this behavior.

To known more:

• man bash