Remove Travis CI config

Create Github Actions config
Split tox ini into one per supported distro so they can be run seperately

Signed-off-by: Adam Warner <me@adamwarner.co.uk>

test/test_centos_fedora_common_support.py

@@ -0,0 +1,66 @@
+import pytest
+from .conftest import (
+    tick_box,
+    info_box,
+    cross_box,
+    mock_command,
+)
+
+
+def mock_selinux_config(state, Pihole):
+    '''
+    Creates a mock SELinux config file with expected content
+    '''
+    # validate state string
+    valid_states = ['enforcing', 'permissive', 'disabled']
+    assert state in valid_states
+    # getenforce returns the running state of SELinux
+    mock_command('getenforce', {'*': (state.capitalize(), '0')}, Pihole)
+    # create mock configuration with desired content
+    Pihole.run('''
+    mkdir /etc/selinux
+    echo "SELINUX={state}" > /etc/selinux/config
+    '''.format(state=state.lower()))
+
+
+def test_selinux_enforcing_exit(Pihole):
+    '''
+    confirms installer prompts to exit when SELinux is Enforcing by default
+    '''
+    mock_selinux_config("enforcing", Pihole)
+    check_selinux = Pihole.run('''
+    source /opt/pihole/basic-install.sh
+    checkSelinux
+    ''')
+    expected_stdout = cross_box + ' Current SELinux: Enforcing'
+    assert expected_stdout in check_selinux.stdout
+    expected_stdout = 'SELinux Enforcing detected, exiting installer'
+    assert expected_stdout in check_selinux.stdout
+    assert check_selinux.rc == 1
+
+
+def test_selinux_permissive(Pihole):
+    '''
+    confirms installer continues when SELinux is Permissive
+    '''
+    mock_selinux_config("permissive", Pihole)
+    check_selinux = Pihole.run('''
+    source /opt/pihole/basic-install.sh
+    checkSelinux
+    ''')
+    expected_stdout = tick_box + ' Current SELinux: Permissive'
+    assert expected_stdout in check_selinux.stdout
+    assert check_selinux.rc == 0
+
+def test_selinux_disabled(Pihole):
+    '''
+    confirms installer continues when SELinux is Disabled
+    '''
+    mock_selinux_config("disabled", Pihole)
+    check_selinux = Pihole.run('''
+    source /opt/pihole/basic-install.sh
+    checkSelinux
+    ''')
+    expected_stdout = tick_box + ' Current SELinux: Disabled'
+    assert expected_stdout in check_selinux.stdout
+    assert check_selinux.rc == 0