[PATCH v8 03/11] test: Allow connecting to a running board

[Simon Glass]

Sometimes we know that the board is already running the right software,
so provide an option to allow running of tests directly, without first
resetting the board.

This saves time when re-running a test where only the Python code is
changing.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

(no changes since v7)

Changes in v7:
- Rename option to --use-running-system

 test/py/conftest.py                   |  3 +++
 test/py/u_boot_console_base.py        | 14 ++++++++++----
 test/py/u_boot_console_exec_attach.py | 21 ++++++++++++---------
 3 files changed, 25 insertions(+), 13 deletions(-)

diff --git a/test/py/conftest.py b/test/py/conftest.py
index 46a410cf268..7a52b966154 100644
--- a/test/py/conftest.py
+++ b/test/py/conftest.py
@@ -80,6 +80,8 @@ def pytest_addoption(parser):
     parser.addoption('--gdbserver', default=None,
         help='Run sandbox under gdbserver. The argument is the channel '+
         'over which gdbserver should communicate, e.g. localhost:1234')
+    parser.addoption('--use-running-system', default=False, action='store_true',
+        help="Assume that U-Boot is ready and don't wait for a prompt")
 
 def run_build(config, source_dir, build_dir, board_type, log):
     """run_build: Build U-Boot
@@ -254,6 +256,7 @@ def pytest_configure(config):
     ubconfig.board_type = board_type
     ubconfig.board_identity = board_identity
     ubconfig.gdbserver = gdbserver
+    ubconfig.use_running_system = config.getoption('use_running_system')
     ubconfig.dtb = build_dir + '/arch/sandbox/dts/test.dtb'
     ubconfig.connection_ok = True
 
diff --git a/test/py/u_boot_console_base.py b/test/py/u_boot_console_base.py
index 965832a4989..311e649d55b 100644
--- a/test/py/u_boot_console_base.py
+++ b/test/py/u_boot_console_base.py
@@ -441,11 +441,17 @@ class ConsoleBase(object):
             if not self.config.gdbserver:
                 self.p.timeout = TIMEOUT_MS
             self.p.logfile_read = self.logstream
-            if expect_reset:
-                loop_num = 2
+            if self.config.use_running_system:
+                # Send an empty command to set up the 'expect' logic. This has
+                # the side effect of ensuring that there was no partial command
+                # line entered
+                self.run_command(' ')
             else:
-                loop_num = 1
-            self.wait_for_boot_prompt(loop_num = loop_num)
+                if expect_reset:
+                    loop_num = 2
+                else:
+                    loop_num = 1
+                self.wait_for_boot_prompt(loop_num = loop_num)
             self.at_prompt = True
             self.at_prompt_logevt = self.logstream.logfile.cur_evt
         except Exception as ex:
diff --git a/test/py/u_boot_console_exec_attach.py b/test/py/u_boot_console_exec_attach.py
index 5f4916b7da2..8b253b4451d 100644
--- a/test/py/u_boot_console_exec_attach.py
+++ b/test/py/u_boot_console_exec_attach.py
@@ -59,15 +59,18 @@ class ConsoleExecAttach(ConsoleBase):
         args = [self.config.board_type, self.config.board_identity]
         s = Spawn(['u-boot-test-console'] + args)
 
-        try:
-            self.log.action('Resetting board')
-            cmd = ['u-boot-test-reset'] + args
-            runner = self.log.get_runner(cmd[0], sys.stdout)
-            runner.run(cmd)
-            runner.close()
-        except:
-            s.close()
-            raise
+        if self.config.use_running_system:
+            self.log.action('Connecting to board without reset')
+        else:
+            try:
+                self.log.action('Resetting board')
+                cmd = ['u-boot-test-reset'] + args
+                runner = self.log.get_runner(cmd[0], sys.stdout)
+                runner.run(cmd)
+                runner.close()
+            except:
+                s.close()
+                raise
 
         return s
 
-- 
2.43.0