[test][conftest] Move prefix sync and cleanup to their own function

This will allow to refresh the prefix content if needed.

beat/editor/test/conftest.py

@@ -49,15 +49,9 @@ prefix = os.path.join(prefix_folder, "prefix")
 environment_file = os.path.join(prefix, "environment.json")
 
 
-@pytest.fixture(
-    scope="module", params=[item for item in AssetType if item is not AssetType.UNKNOWN]
-)
-def asset_type(request):
-    return request.param
-
+def sync_prefix():
+    """Copy the content of the various package test prefixes in the running test prefix"""
 
-@pytest.fixture(scope="module")
-def test_prefix():
     prefixes = [
         pkg_resources.resource_filename("beat.backend.python.test", "prefix"),
         pkg_resources.resource_filename("beat.core.test", "prefix"),
@@ -66,17 +60,9 @@ def test_prefix():
     for path in prefixes:
         subprocess.check_call(["rsync", "-arz", path, prefix_folder])
 
-    with open(environment_file, "wt") as env_file:
-        env_file.write(
-            json.dumps(
-                {
-                    "Test Env": {"name": "Python 2.7", "version": "1.3.0"},
-                    "Another test Env": {"name": "another test", "version": "1.1.1"},
-                }
-            )
-        )
 
-    yield prefix
+def clean_prefix():
+    """Removes the content of the test prefix(s)"""
 
     shutil.rmtree(prefix_folder)
 
@@ -93,6 +79,32 @@ def test_prefix():
         pass
 
 
+@pytest.fixture(
+    scope="module", params=[item for item in AssetType if item is not AssetType.UNKNOWN]
+)
+def asset_type(request):
+    return request.param
+
+
+@pytest.fixture(scope="module")
+def test_prefix():
+    sync_prefix()
+
+    with open(environment_file, "wt") as env_file:
+        env_file.write(
+            json.dumps(
+                {
+                    "Test Env": {"name": "Python 2.7", "version": "1.3.0"},
+                    "Another test Env": {"name": "another test", "version": "1.1.1"},
+                }
+            )
+        )
+
+    yield prefix
+
+    clean_prefix()
+
+
 @pytest.fixture(scope="module")
 def beat_context(test_prefix):
     Context = namedtuple("Context", ["meta"])