Add fixture to cut Satellite off nameservers

pytest_fixtures/component/http_proxy.py

@@ -1,3 +1,5 @@
+from urllib.parse import urlparse
+
 import pytest
 
 from robottelo.config import settings
@@ -10,6 +12,34 @@ def session_auth_proxy(session_target_sat):
     return ProxyHost(settings.http_proxy.auth_proxy_url)
 
 
+@pytest.fixture
+def satellite_cut_off(target_sat):
+    """Cuts the Satellite off the DNS, leaving it with HTTP proxy only"""
+    # First create entries in /etc/hosts for HTTP proxies and Satellite itself
+    ips = []
+    for url in [
+        settings.http_proxy.un_auth_proxy_url,
+        settings.http_proxy.auth_proxy_url,
+        target_sat.url,
+    ]:
+        hostname = urlparse(url).hostname
+        adr = target_sat.execute(
+            f"nslookup {hostname} | awk '/^Address: / {{ print $2 }}'"
+        ).stdout.strip()
+        target_sat.execute(f'echo "{adr} {hostname}" >> /etc/hosts')
+        ips.append(adr)
+    # Cut off the nameservers
+    target_sat.execute('sed -i "s/nameserver/;nameserver/g" /etc/resolv.conf')
+
+    yield
+
+    # Restore the nameservers
+    target_sat.execute('sed -i "s/;nameserver/nameserver/g" /etc/resolv.conf')
+    # Remove the added entries from /etc/hosts
+    for adr in ips:
+        target_sat.execute(f'sed -i "/^{adr}/d" /etc/hosts')
+
+
 @pytest.fixture
 def setup_http_proxy(request, module_manifest_org, target_sat):
     """Create a new HTTP proxy and set related settings based on proxy"""

tests/foreman/cli/test_http_proxy.py

@@ -189,7 +189,7 @@ def test_positive_environment_variable_unset_set():
 @pytest.mark.e2e
 @pytest.mark.tier2
 @pytest.mark.skipif((not settings.robottelo.REPOS_HOSTING_URL), reason='Missing repos_hosting_url')
-def test_positive_assign_http_proxy_to_products(module_org, module_target_sat):
+def test_positive_assign_http_proxy_to_products(module_org, module_target_sat, satellite_cut_off):
     """Assign http_proxy to Products and perform product sync.
 
     :id: 6af7b2b8-15d5-4d9f-9f87-e76b404a966f