[nrf fromlist] tests: lwm2m: Fix minor timing issues on tests

* Wait for update when new object is created

  Sometimes our blockwise transfer starts before server have
  received an LwM2M Update. This causes Leshan to reject the SEND
  because is was not aware of object /19/0

* Wait "registered" message already in conftest.py.
  Sometimes Qemu boots faster, and the testcase don't see the
  log.

Upstream PR: zephyrproject-rtos/zephyr#79261

Signed-off-by: Seppo Takalo <[email protected]>

Author: SeppoTakalo

tests/net/lib/lwm2m/interop/pytest/test_blockwise.py

@@ -79,6 +79,8 @@ def test_blockwise_3(shell: Shell, dut: DeviceAdapter, leshan: Leshan, endpoint:
     """Blockwise test 3: Block-Wise Get using TLV and SenML-CBOR content formats"""
 
     shell.exec_command('lwm2m create /19/0')
+    # Wait for update to finish so server is aware of the /19/0 object
+    dut.readlines_until(regex='.*net_lwm2m_rd_client: Update Done', timeout=5.0)
 
     # Generate 4 kB of binary app-data
     # and write it into BinaryAppData object
@@ -109,6 +111,9 @@ def test_blockwise_4(shell: Shell, dut: DeviceAdapter, leshan: Leshan, endpoint:
     """Blockwise test 4: Block-Wise SEND using SenML-CBOR content format"""
 
     shell.exec_command('lwm2m create /19/0')
+    # Wait for update to finish so server is aware of the /19/0 object
+    dut.readlines_until(regex='.*net_lwm2m_rd_client: Update Done', timeout=5.0)
+
     # Generate 4 kB of binary app-data
     data = ''.join(random.choice(string.ascii_letters) for i in range(4096)).encode()
     fmt = leshan.format

tests/net/lib/lwm2m/interop/pytest/test_nosec.py

@@ -26,11 +26,8 @@
 def test_LightweightM2M_1_1_int_101(shell: Shell, dut: DeviceAdapter, leshan: Leshan, endpoint_nosec: str):
     """
     Verify that the client is registered.
-    Note that this MUST be the first testcase executed, otherwise it will fail to get the
-    correct log output.
     """
     logger.info("LightweightM2M-1.1-int-101 - Initial Registration")
-    dut.readlines_until(regex='.*Registration Done', timeout=5.0)
     assert leshan.get(f'/clients/{endpoint_nosec}')
 
 def test_LightweightM2M_1_1_int_105(shell: Shell, dut: DeviceAdapter, leshan: Leshan, endpoint_nosec: str, helperclient: object):