[cli] make test failure less verbose + print ssh (#10767)

python/ray/tests/test_cli.py

@@ -91,21 +91,23 @@ def _debug_check_line_by_line(result, expected_lines):
     i = 0
 
     for out in output_lines:
-        print(out)
-
         if i >= len(expected_lines):
             i += 1
             print("!!!!!! Expected fewer lines")
-            print("\n".join(output_lines[i:]))
+            context = [f"CONTEXT: {line}" for line in output_lines[i - 3:i]]
+            print("\n".join(context))
+            extra = [f"-- {line}" for line in output_lines[i:]]
+            print("\n".join(extra))
             break
 
         exp = expected_lines[i]
         matched = re.fullmatch(exp + r" *", out) is not None
         if not matched:
-            print(f"!!!!!!! Expected (regex): {repr(exp)}")
+            print(f"!!! ERROR: Expected (regex): {repr(exp)}")
+            print(f"Got: {out}")
         i += 1
     if i < len(expected_lines):
-        print("!!!!!!! Expected (regex):")
+        print("!!! ERROR: Expected extra lines (regex):")
         for line in expected_lines[i:]:
 
             print(repr(line))

python/ray/tests/test_cli_patterns/test_ray_up.txt

@@ -41,5 +41,7 @@ Acquiring an up-to-date head node
 Useful commands
   Monitor autoscaling with
     ray exec .+ 'tail -n 100 -f /tmp/ray/session_latest/logs/monitor\*'
-  Connect to a terminal on the cluster head
+  Connect to a terminal on the cluster head:
     ray attach .+
+  Get a remote shell to the cluster manually:
+    ssh .+

python/ray/tests/test_cli_patterns/test_ray_up_record.txt

@@ -70,5 +70,7 @@
 .+\.py.*Useful commands
 .+\.py.*Monitor autoscaling with
 .+\.py.*  ray exec .+ 'tail -n 100 -f .+
-.+\.py.*Connect to a terminal on the cluster head
+.+\.py.*Connect to a terminal on the cluster head:
 .+\.py.*  ray attach .+
+.+\.py.*Get a remote shell to the cluster manually:
+.+\.py.*  ssh.+\.pem.+