testing: adding a test for getting a tree with two outputs (#309)

tests/ipc/README.md

@@ -15,3 +15,8 @@ pip install -r requirements.txt
 source venv/bin/activate
 pytest
 ```
+
+### Environment variables
+- `MIRACLE_IPC_TEST_USE_ENV`: If set to true, tests will use the local environment to test
+  miracle-wm against instead of spawning miracle-wm itself.
+- `MIRACLE_IPC_TEST_BIN`: can be set to a `path/to/miracle-wm`. Defaults to `miracle-wm`.

tests/ipc/conftest.py

@@ -2,6 +2,7 @@
 import subprocess
 from subprocess import Popen, PIPE, STDOUT
 import os
+from typing import List, Tuple, Dict
 
 class Server:
     def __init__(self, ipc: str, wayland: str) -> None:
@@ -12,22 +13,54 @@ def open_app(self, command: str):
         my_env = os.environ.copy()
         my_env['WAYLAND_DISPLAY'] = self.wayland
         return subprocess.Popen([command], env=my_env)
+
+def _create_server(args: List[str]) -> Tuple[Popen[bytes], Dict[str, str]]:
+    command = "miracle-wm"
+    if "MIRACLE_IPC_TEST_BIN" in os.environ:
+        command = os.environ["MIRACLE_IPC_TEST_BIN"]
+
+    env = os.environ.copy()
+    env['WAYLAND_DISPLAY'] = 'wayland-98'
+    process = Popen([command] + args,
+                    env=env, stdout=PIPE, stderr=STDOUT)    
+    return (process, env)
 
 @pytest.fixture(scope="function")
 def server():
     if "MIRACLE_IPC_TEST_USE_ENV" in os.environ:
         yield Server(os.environ["SWAYSOCK"], os.environ["WAYLAND_DISPLAY"])
         return
 
-    command = "miracle-wm"
-    if "MIRACLE_IPC_TEST_BIN" in os.environ:
-        command = os.environ["MIRACLE_IPC_TEST_BIN"]
+    (process, env) = _create_server(['--platform-display-libs', 'mir:virtual', '--virtual-output', '800x600', '--no-config', '1'])
+    socket = ""
+    to_find = "Listening to IPC socket on path: "   
+    with process.stdout:
+        for line in iter(process.stdout.readline, b''):
+            data = line.decode("utf-8").strip()
+            # print(data)
+            if to_find in data:
+                i = data.index(to_find)
+                i = i + len(to_find)
+                socket = data[i:].strip()
+                break
+
+        yield Server(socket, env["WAYLAND_DISPLAY"])
+
+        # for line in iter(process.stdout.readline, b''):
+        #     data = line.decode("utf-8").strip()
+        #     print(data)
+
+        process.terminate()
+        return
 
-    env = os.environ.copy()
-    env['WAYLAND_DISPLAY'] = 'wayland-98'
-    process = Popen([command, '--platform-display-libs', 'mir:virtual', '--virtual-output', '800x600', '--no-config', '1'],
-                    env=env, stdout=PIPE, stderr=STDOUT)
+
+@pytest.fixture(scope="function")
+def multi_win_server():
+    if "MIRACLE_IPC_TEST_USE_ENV" in os.environ:
+        yield Server(os.environ["SWAYSOCK"], os.environ["WAYLAND_DISPLAY"])
+        return
 
+    (process, env) = _create_server(['--platform-display-libs', 'mir:virtual', '--virtual-output', '800x600', '--virtual-output', '400x300', '--no-config', '1'])
     socket = ""
     to_find = "Listening to IPC socket on path: "   
     with process.stdout:

tests/ipc/test_get_tree.py

@@ -52,3 +52,8 @@ def test_percent_two_containers(self, server):
         app = workspace.nodes[1]
         assert app.focused == True
         assert app.percent == 0.5
+
+    def test_two_outputs(self, multi_win_server):
+        conn = Connection(multi_win_server.ipc)
+        container = conn.get_tree()
+        assert len(container.nodes) == 2