Add mock client fixture for mseed test

test/edge_test/conftest.py

+import numpy
+from obspy import Stream, UTCDateTime
+from obspy.clients.neic.client import Client
+import pytest
+
+from geomagio import TimeseriesUtility
+
+
+@pytest.fixture(scope="class")
+def MockMiniSeedClient() -> Client:
+    """replaces default obspy miniseed client's get_waveforms method to return trace of ones"""
+
+    class MockMiniSeedClient(Client):
+        def get_waveforms(
+            self,
+            network: str,
+            station: str,
+            location: str,
+            channel: str,
+            starttime: UTCDateTime,
+            endtime: UTCDateTime,
+        ):
+            trace = TimeseriesUtility.create_empty_trace(
+                starttime=starttime,
+                endtime=endtime,
+                observatory=station,
+                channel=channel,
+                type=self._get_data_type(location=location),
+                interval=self._get_interval(channel=channel),
+                network=network,
+                station=station,
+                location=location,
+            )
+            trace.data = numpy.ones(trace.stats.npts)
+            return Stream([trace])
+
+        def _get_interval(self, channel: str) -> str:
+            channel_start = channel[0]
+            if channel_start == "B":
+                return "tenhertz"
+            elif channel_start == "L":
+                return "second"
+            elif channel_start == "U":
+                return "minute"
+            elif channel_start == "R":
+                return "hour"
+            elif channel_start == "P":
+                return "day"
+            else:
+                raise ValueError(f"Unexpected channel start: {channel_start}")
+
+        def _get_data_type(self, location: str) -> str:
+            location_start = location[0]
+            if location_start == "R":
+                return "variation"
+            elif location_start == "A":
+                return "adjusted"
+            elif location_start == "Q":
+                return "quasi-definitive"
+            elif location_start == "D":
+                return "definitive"
+            else:
+                raise ValueError(f"Unexpected location start: {location_start}")
+
+    yield MockMiniSeedClient