Do an upload and download.

benchmarks/test_cli.py

@@ -1,7 +1,40 @@
 """Benchmarks for minimal `tahoe` CLI interactions."""
 
-def test_cp_one_file(client_node):
+from subprocess import Popen, PIPE
+
+import pytest
+
+from integration.util import cli
+
+
+@pytest.fixture(scope="session")
+def cli_alias(client_node):
+    cli(client_node.process, "create-alias", "cli")
+
+
+def test_get_put_one_file(client_node, cli_alias, tmp_path):
     """
-    Upload a file with tahoe cp and then download it, measuring the latency of
-    both operations.
+    Upload a file with ``tahoe put`` and then download it with ``tahoe get``,
+    measuring the latency of both operations.
     """
+    file_size = 1000  # parameterize later on
+    file_path = tmp_path / "file"
+    DATA = b"0123456789" * (file_size // 10)
+
+    with file_path.open("wb") as f:
+        f.write(DATA)
+    cli(client_node.process, "put", str(file_path), "cli:tostdout")
+
+    p = Popen(
+        [
+            "tahoe",
+            "--node-directory",
+            client_node.process.node_dir,
+            "get",
+            "cli:tostdout",
+            "-",
+        ],
+        stdout=PIPE,
+    )
+    assert p.stdout.read() == DATA
+    assert p.wait() == 0