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_8_support.py

@@ -0,0 +1,67 @@
+import pytest
+from .conftest import (
+    tick_box,
+    info_box,
+    cross_box,
+    mock_command,
+)
+
+
+def test_php_upgrade_default_continue_centos_gte_8(Pihole):
+    '''
+    confirms the latest version of CentOS continues / does not optout
+    (should trigger on CentOS7 only)
+    '''
+    distro_check = Pihole.run('''
+    source /opt/pihole/basic-install.sh
+    distro_check
+    ''')
+    unexpected_stdout = info_box + (' User opt-out of PHP 7 upgrade on CentOS.'
+                                    ' Deprecated PHP may be in use.')
+    assert unexpected_stdout not in distro_check.stdout
+    # ensure remi was not installed on latest CentOS
+    remi_package = Pihole.package('remi-release')
+    assert not remi_package.is_installed
+
+
+def test_php_upgrade_user_optout_skipped_centos_gte_8(Pihole):
+    '''
+    confirms installer skips user opt-out of installing PHP7 from REMI on
+    latest CentOS (should trigger on CentOS7 only)
+    (php not currently installed)
+    '''
+    # Whiptail dialog returns Cancel for user prompt
+    mock_command('whiptail', {'*': ('', '1')}, Pihole)
+    distro_check = Pihole.run('''
+    source /opt/pihole/basic-install.sh
+    distro_check
+    ''')
+    unexpected_stdout = info_box + (' User opt-out of PHP 7 upgrade on CentOS.'
+                                    ' Deprecated PHP may be in use.')
+    assert unexpected_stdout not in distro_check.stdout
+    # ensure remi was not installed on latest CentOS
+    remi_package = Pihole.package('remi-release')
+    assert not remi_package.is_installed
+
+
+def test_php_upgrade_user_optin_skipped_centos_gte_8(Pihole):
+    '''
+    confirms installer skips user opt-in to installing PHP7 from REMI on
+    latest CentOS (should trigger on CentOS7 only)
+    (php not currently installed)
+    '''
+    # Whiptail dialog returns Continue for user prompt
+    mock_command('whiptail', {'*': ('', '0')}, Pihole)
+    distro_check = Pihole.run('''
+    source /opt/pihole/basic-install.sh
+    distro_check
+    ''')
+    assert 'opt-out' not in distro_check.stdout
+    unexpected_stdout = info_box + (' Enabling Remi\'s RPM repository '
+                                    '(https://rpms.remirepo.net)')
+    assert unexpected_stdout not in distro_check.stdout
+    unexpected_stdout = tick_box + (' Remi\'s RPM repository has '
+                                    'been enabled for PHP7')
+    assert unexpected_stdout not in distro_check.stdout
+    remi_package = Pihole.package('remi-release')
+    assert not remi_package.is_installed