test: lwm2m: Refactor tests to work with fallback changes

In fallback refactoring to the LwM2M engine, some changes
to the server object are visible in hard-coded test
values.

Also, add Endpoint wrapper class that ensures the registration
state of the returned endpoint.

Signed-off-by: Seppo Takalo <seppo.takalo@nordicsemi.no>

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

@@ -27,6 +27,25 @@ BOOTSTRAP_COAPS_PORT: int = 5784
 
 logger = logging.getLogger(__name__)
 
+class Endpoint:
+    def __init__(self, name: str, shell: Shell, registered: bool = False, bootstrap: bool = False):
+        self.name = name
+        self.registered = registered
+        self.bootstrap = bootstrap
+        self.shell = shell
+        self.last_update = 0.0
+
+    def check_update(self):
+        if not self.registered:
+            return
+        if self.last_update < time.time() - 5:
+            self.shell.exec_command('lwm2m update')
+            self.last_update = time.time()
+
+    def __str__(self):
+        return self.name
+
+
 @pytest.fixture(scope='session')
 def leshan() -> Leshan:
     """
@@ -89,9 +108,8 @@ def endpoint_nosec(shell: Shell, dut: DeviceAdapter, leshan: Leshan) -> str:
     shell.exec_command('lwm2m write 1/0/0 -u16 1')
     shell.exec_command('lwm2m write 1/0/1 -u32 86400')
     shell.exec_command(f'lwm2m start {ep} -b 0')
-    dut.readlines_until(regex=f"RD Client started with endpoint '{ep}'", timeout=10.0)
 
-    yield ep
+    yield Endpoint(ep, shell)
 
     # All done
     shell.exec_command('lwm2m stop')
@@ -125,7 +143,7 @@ def endpoint_bootstrap(shell: Shell, dut: DeviceAdapter, leshan: Leshan, leshan_
         shell.exec_command(f'lwm2m write 0/0/5 -s {bs_passwd}')
         shell.exec_command(f'lwm2m start {ep} -b 1')
 
-        yield ep
+        yield Endpoint(ep, shell)
 
         shell.exec_command('lwm2m stop')
         dut.readlines_until(regex=r'.*Deregistration success', timeout=10.0)
@@ -137,12 +155,16 @@ def endpoint_bootstrap(shell: Shell, dut: DeviceAdapter, leshan: Leshan, leshan_
         leshan_bootstrap.delete_bs_device(ep)
 
 @pytest.fixture(scope='module')
-def endpoint_registered(endpoint_bootstrap, shell: Shell, dut: DeviceAdapter) -> str:
+def endpoint_registered(endpoint_bootstrap, dut: DeviceAdapter) -> str:
     """Fixture that returns an endpoint that is registered."""
+    if not endpoint_bootstrap.registered:
         dut.readlines_until(regex='.*Registration Done', timeout=5.0)
+        endpoint_bootstrap.bootstrap = True
+        endpoint_bootstrap.registered = True
     return endpoint_bootstrap
 
-@pytest.fixture(scope='module')
+@pytest.fixture(scope='function')
 def endpoint(endpoint_registered) -> str:
     """Fixture that returns an endpoint that is registered."""
+    endpoint_registered.check_update()
     return endpoint_registered

tests/net/lib/lwm2m/interop/pytest/test_lwm2m.py

@@ -171,6 +171,7 @@ def verify_setting_basic_in_format(shell, leshan, endpoint, format):
     verify_server_object(server_obj)
     # Remove Read-Only resources, so we don't end up writing those
     del server_obj[0][0]
+    del server_obj[0][13]
     data = {
         2: 101,
         3: 1010,
@@ -208,7 +209,7 @@ def test_LightweightM2M_1_1_int_222(shell: Shell, leshan: Leshan, endpoint: str)
     """LightweightM2M-1.1-int-222 - Read on Object"""
     resp = leshan.read(endpoint, '1')
     assert len(resp) == 1
-    assert len(resp[1][0]) == 9
+    assert len(resp[1][0]) == 11
     resp = leshan.read(endpoint, '3')
     assert len(resp) == 1
     assert len(resp[3]) == 1
@@ -218,7 +219,7 @@ def test_LightweightM2M_1_1_int_222(shell: Shell, leshan: Leshan, endpoint: str)
 def test_LightweightM2M_1_1_int_223(shell: Shell, leshan: Leshan, endpoint: str):
     """LightweightM2M-1.1-int-223 - Read on Object Instance"""
     resp = leshan.read(endpoint, '1/0')
-    assert len(resp[0]) == 9
+    assert len(resp[0]) == 11
     resp = leshan.read(endpoint, '3/0')
     assert len(resp[0]) == 15
     assert resp[0][0] == 'Zephyr'
@@ -282,7 +283,7 @@ def test_LightweightM2M_1_1_int_229(shell: Shell, leshan: Leshan, endpoint: str)
         assert resp[3] is not None
         assert resp[1][0] is not None
         assert len(resp[3][0]) == 15
-        assert len(resp[1][0]) == 9
+        assert len(resp[1][0]) == 11
 
         resp = leshan.composite_read(endpoint, ['1/0/1', '/3/0/11/0'])
         logger.debug(resp)
@@ -370,7 +371,7 @@ def test_LightweightM2M_1_1_int_234(shell: Shell, leshan: Leshan, endpoint: str)
 def test_LightweightM2M_1_1_int_235(leshan: Leshan, endpoint: str):
     """LightweightM2M-1.1-int-235 - Read-Composite Operation on root path"""
     resp = leshan.composite_read(endpoint, ['/'])
-    expected_keys = [16, 1, 3, 5]
+    expected_keys = [1, 3, 5]
     missing_keys = [key for key in expected_keys if key not in resp.keys()]
     assert len(missing_keys) == 0