How to pass in a option or cli

[prolificcoder]

I need to pass in --grep = 'test name' to my task mochaTest:android. How do I do that?
I've been trying this for a while and tried following.
tasks:[{
grunt:true,
args:['mochaTest:android'],
options: ['--grep=test_names'],
}, {
grunt:true,
args:['mochaTest:android'],
options:['--grep=test_names'],
}]
}

tasks:[{
grunt:true,
args:['mochaTest:android --grep='test_name'],
}, {
grunt:true,
args:['mochaTest:android'],
}]
}

tasks:[{
grunt:true,
args:['mochaTest:android'],
flags: ['--grep=test_names'],
}, {
grunt:true,
args:['mochaTest:android'],
flags:['--grep=test_names'],
}]
}

tasks:[{
grunt:true,
args:['mochaTest:android'],
flags: 'grep=test_names',
}, {
grunt:true,
args:['mochaTest:android'],
flags:'grep=test_names',
}]
}

[prolificcoder]

to be clear I was able to passin correct arguments from the command line/std in but I want to be able to pass arguments from within the task definition