tests: on_target: add memfault test

Add memfault test.
Test check that coredump are uploaded to memfault.

Signed-off-by: Giacomo Dematteis <giacomo.dematteis@nordicsemi.no>

Author: DematteisGiacomo

tests/on_target/tests/test_functional/test_memfault.py

@@ -0,0 +1,81 @@
+##########################################################################################
+# Copyright (c) 2025 Nordic Semiconductor
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+##########################################################################################
+
+import pytest
+import os
+import requests
+import datetime
+import time
+from utils.flash_tools import flash_device, reset_device
+from utils.logger import get_logger
+
+MEMFAULT_ORG_TOKEN = os.getenv('MEMFAULT_ORGANIZATION_TOKEN')
+MEMFAULT_ORG = os.getenv('MEMFAULT_ORGANIZATION_SLUG')
+MEMFAULT_PROJ = os.getenv('MEMFAULT_PROJECT_SLUG')
+IMEI = os.getenv('IMEI')
+MEMFAULT_TIMEOUT = 5 * 60
+
+logger = get_logger()
+
+url = "https://api.memfault.com/api/v0"
+auth = ("", MEMFAULT_ORG_TOKEN)
+
+
+def get_traces(family, device_id):
+    r = requests.get(
+        f"{url}/organizations/{MEMFAULT_ORG}/projects/{MEMFAULT_PROJ}/traces", auth=auth)
+    r.raise_for_status()
+    data = r.json()["data"]
+    latest_traces = [
+        x
+        for x in data
+        if x["device"]["device_serial"] == str(device_id) and x["source_type"] == family
+    ]
+    return latest_traces
+
+def get_latest_coredump_traces(device_id):
+    return get_traces("coredump", device_id)
+
+def timestamp(event):
+    return datetime.datetime.strptime(
+        event["captured_date"], "%Y-%m-%dT%H:%M:%S.%f%z"
+    )
+
+
+def test_memfault(t91x_board, hex_file):
+    # Save timestamp of latest coredump
+    coredumps = get_latest_coredump_traces(IMEI)
+    timestamp_old_coredump = timestamp(coredumps[0]) if coredumps else  None
+
+    flash_device(os.path.abspath(hex_file))
+    t91x_board.uart.xfactoryreset()
+    patterns_memfault = [
+            "Network connectivity established",
+            "memfault: memfault_task: Memfault module task started",
+            "memfault: memfault_task: Cloud status received",
+    ]
+
+    t91x_board.uart.flush()
+    reset_device()
+    t91x_board.uart.wait_for_str(patterns_memfault, timeout=120)
+
+    # Trigger bus fault to generate memfault event
+    t91x_board.uart.write("mflt test usagefault\r\n")
+
+    # Wait for upload to be reported to memfault api
+    start = time.time()
+    while time.time() - start < MEMFAULT_TIMEOUT:
+            time.sleep(5)
+            coredumps = get_latest_coredump_traces(IMEI)
+            if not coredumps:
+                continue
+            # Check that we have an upload with newer timestamp
+            if not timestamp_old_coredump:
+                break
+            if timestamp(coredumps[0]) > timestamp_old_coredump:
+                break
+    else:
+        raise RuntimeError(f"No new coredump observed")
+