Pytest: How do I change ~/.bashrc token durning runtime?

I want to dynamically change token in my bashrc to assert an expected outcome.

For example: in my ~/.bashrc i have my token set

export GITHUB_ACCESS_TOKEN=ghp_NNNNNNNNNNNN

During the test I want to set the token

export GITHUB_ACCESS_TOKEN=TEST

and then assert to check that I cant access my repos by running a click command:

result = runner.invoke(clicker_cli, ["git", "clone", "<url_here>"])

It is not working as intended. I can still access my repo with my original token.

Context: I am using https://click.palletsprojects.com/en/8.0.x/ https://docs.pytest.org/en/6.2.x/monkeypatch.html

You can set an optional env dictionary (Mapping) that will be used at runtime. Check the invoke documentation for detail. So the following code will do the trick.

result = runner.invoke(
   clicker_cli, ["git", "clone", "<url_here>"], 
   env={"GITHUB_ACCESS_TOKEN": "TEST"}
)

Full example

Here is a full working example.

import click
import os
from click.testing import CliRunner


@click.command()
@click.argument("msg")
def echo_token(msg):
    click.echo(f"{msg} {os.environ.get('GITHUB_ACCESS_TOKEN')}")


def test_echo_token(token="MY_TOKEN"):
    runner = CliRunner()
    result = runner.invoke(echo_token, ["Token is"],
             env={"GITHUB_ACCESS_TOKEN": token})
    assert result.exit_code == 0
    assert token in result.output
    print(result.output)

We can see that the environment variable is correctly set by running it.

pytest -s click_test.py
# click_test.py Token is MY_TOKEN