test-client: use a test fixture from the test

Don't rely on resources provided by mock metadata server by default,
create the from within the test instead.

This allows for more flexibility, but the locality of the test fixture
relative to the tests makes the test more legible.

src/tests/client/test-client.py

@@ -147,6 +147,7 @@ except ImportError:
 try:
     from http.server import HTTPServer
     from http.server import BaseHTTPRequestHandler
+    from http.client import HTTPConnection, HTTPResponse
 except ImportError:
     HTTPServer = None
 
@@ -2139,6 +2140,13 @@ class TestNmcli(TestNmClient):
 
 
 class TestNmCloudSetup(TestNmClient):
+
+    _mac1 = "9e:c0:3e:92:24:2d"
+    _mac2 = "53:e9:7e:52:8d:a8"
+
+    _ip1 = "172.31.26.249"
+    _ip2 = "172.31.176.249"
+
     def cloud_setup_test(func):
         """
         Runs the mock NetworkManager along with a mock cloud metadata service.
@@ -2169,14 +2177,16 @@ class TestNmCloudSetup(TestNmClient):
             env = os.environ.copy()
             env["LISTEN_FDS"] = "1"
             p = subprocess.Popen(
-                [sys.executable, service_path],
+                [sys.executable, service_path, "--empty"],
                 stdin=subprocess.PIPE,
                 env=env,
                 pass_fds=(3,),
                 preexec_fn=pass_socket,
             )
 
-            self.md_url = "http://%s:%d" % s.getsockname()
+            (hostaddr, port) = s.getsockname()
+            self.md_conn = HTTPConnection(hostaddr, port=port)
+            self.md_url = "http://%s:%d" % (hostaddr, port)
             s.close()
 
             error = None
@@ -2188,6 +2198,7 @@ class TestNmCloudSetup(TestNmClient):
                 error = e
             self._nm_test_post()
 
+            self.md_conn.close()
             p.stdin.close()
             p.terminate()
             p.wait()
@@ -2218,6 +2229,34 @@ class TestNmCloudSetup(TestNmClient):
             delay=0,
         )
 
+    def _mock_path(self, path, body):
+        self.md_conn.request("PUT", path, body=body)
+        self.md_conn.getresponse().read()
+
+    @cloud_setup_test
+    def test_ec2(self):
+        self._mock_devices()
+
+        _ec2_macs = "/2018-09-24/meta-data/network/interfaces/macs/"
+        self._mock_path("/latest/meta-data/", "ami-id\n")
+        self._mock_path(
+            _ec2_macs, TestNmCloudSetup._mac2 + "\n" + TestNmCloudSetup._mac1
+        )
+        self._mock_path(
+            _ec2_macs + TestNmCloudSetup._mac2 + "/subnet-ipv4-cidr-block",
+            "172.31.16.0/20",
+        )
+        self._mock_path(
+            _ec2_macs + TestNmCloudSetup._mac2 + "/local-ipv4s", TestNmCloudSetup._ip1
+        )
+        self._mock_path(
+            _ec2_macs + TestNmCloudSetup._mac1 + "/subnet-ipv4-cidr-block",
+            "172.31.166.0/20",
+        )
+        self._mock_path(
+            _ec2_macs + TestNmCloudSetup._mac1 + "/local-ipv4s", TestNmCloudSetup._ip2
+        )
+
         # Run nm-cloud-setup for the first time
         nmc = self.call_pexpect(
             ENV_NM_TEST_CLIENT_CLOUD_SETUP_PATH,