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adapt location CTS to density-based coarsening #4

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adapt location CTS to density-based coarsening #4

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51f556b
test synchronous population density queries
soupslurpr Jul 17, 2026
9fcb4ff
adapt coarse location CTS to S2 accuracy
soupslurpr Jul 18, 2026
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48 changes: 26 additions & 22 deletions ...s/location/location_coarse/src/android/location/cts/coarse/LocationManagerCoarseTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -50,7 +50,6 @@
import android.os.SystemClock;
import android.platform.test.annotations.AppModeFull;
import android.provider.Settings;
import android.util.Log;

import androidx.test.core.app.ApplicationProvider;
import androidx.test.ext.junit.runners.AndroidJUnit4;
Expand All @@ -69,38 +68,33 @@
@RunWith(AndroidJUnit4.class)
public class LocationManagerCoarseTest {

private static final String TAG = "LocationManagerCoarseTest";

private static final long TIMEOUT_MS = 5000;
private static final long RANDOM_SEED = 0;

private static final float MIN_COARSE_FUDGE_DISTANCE_M = 2000f;
private static final float MIN_COARSE_LOCATION_OFFSET_SCALE_METERS = 2000f;

private static final String TEST_PROVIDER = "test_provider";

private Random mRandom;
private Context mContext;
private LocationManager mManager;

private float mMaxCoarseFudgeDistanceM;
private float mCoarseLocationOffsetScaleMeters;

@Before
public void setUp() throws Exception {
LocationUtils.registerMockLocationProvider(InstrumentationRegistry.getInstrumentation(),
true);

long seed = System.currentTimeMillis();
Log.i(TAG, "location random seed: " + seed);

mRandom = new Random(seed);
mRandom = new Random(RANDOM_SEED);
mContext = ApplicationProvider.getApplicationContext();
mManager = mContext.getSystemService(LocationManager.class);

float coarseLocationAccuracyM = Settings.Secure.getFloat(
mContext.getContentResolver(),
LOCATION_COARSE_ACCURACY_M,
MIN_COARSE_FUDGE_DISTANCE_M);
mMaxCoarseFudgeDistanceM = (float) Math.sqrt(
2 * coarseLocationAccuracyM * coarseLocationAccuracyM);
mCoarseLocationOffsetScaleMeters =
Settings.Secure.getFloat(
mContext.getContentResolver(),
LOCATION_COARSE_ACCURACY_M,
MIN_COARSE_LOCATION_OFFSET_SCALE_METERS);

assertNotNull(mManager);

Expand Down Expand Up @@ -135,20 +129,20 @@ public void tearDown() throws Exception {
}

@Test
public void testMinCoarseLocationDistance() {
public void testMinCoarseLocationOffsetScale() {
assertThat(Settings.Secure.getFloat(
mContext.getContentResolver(),
LOCATION_COARSE_ACCURACY_M,
MIN_COARSE_FUDGE_DISTANCE_M)).isAtLeast(MIN_COARSE_FUDGE_DISTANCE_M);
MIN_COARSE_LOCATION_OFFSET_SCALE_METERS))
.isAtLeast(MIN_COARSE_LOCATION_OFFSET_SCALE_METERS);
}

@Test
public void testGetLastKnownLocation() {
Location loc = createLocation(TEST_PROVIDER, mRandom);

mManager.setTestProviderLocation(TEST_PROVIDER, loc);
assertThat(mManager.getLastKnownLocation(TEST_PROVIDER)).isNearby(loc,
mMaxCoarseFudgeDistanceM);
assertCoarseLocationIsNearby(mManager.getLastKnownLocation(TEST_PROVIDER), loc);
}

@Test
Expand All @@ -158,6 +152,7 @@ public void testGetLastKnownLocation_FastInterval() {

mManager.setTestProviderLocation(TEST_PROVIDER, loc1);
Location coarseLocation = mManager.getLastKnownLocation(TEST_PROVIDER);
assertNotNull(coarseLocation);
mManager.setTestProviderLocation(TEST_PROVIDER, loc2);
assertThat(mManager.getLastKnownLocation(TEST_PROVIDER)).isEqualTo(coarseLocation);
}
Expand All @@ -179,7 +174,7 @@ public void testRequestLocationUpdates() throws Exception {
Runnable::run,
capture);
mManager.setTestProviderLocation(TEST_PROVIDER, loc);
assertThat(capture.getNextLocation(TIMEOUT_MS)).isNearby(loc, mMaxCoarseFudgeDistanceM);
assertCoarseLocationIsNearby(capture.getNextLocation(TIMEOUT_MS), loc);
mManager.setTestProviderLocation(TEST_PROVIDER, createLocation(TEST_PROVIDER, mRandom));
assertThat(capture.getNextLocation(TIMEOUT_MS)).isNull();
}
Expand All @@ -203,7 +198,7 @@ public void testRequestLocationUpdates_Passive() throws Exception {
Runnable::run,
capture);
mManager.setTestProviderLocation(TEST_PROVIDER, loc);
assertThat(capture.getNextLocation(TIMEOUT_MS)).isNearby(loc, mMaxCoarseFudgeDistanceM);
assertCoarseLocationIsNearby(capture.getNextLocation(TIMEOUT_MS), loc);
mManager.setTestProviderLocation(TEST_PROVIDER, createLocation(TEST_PROVIDER, mRandom));
assertThat(capture.getNextLocation(TIMEOUT_MS)).isNull();
}
Expand All @@ -221,10 +216,19 @@ public void testRequestLocationUpdates_PendingIntent() throws Exception {
try (LocationPendingIntentCapture capture = new LocationPendingIntentCapture(mContext)) {
mManager.requestLocationUpdates(TEST_PROVIDER, 0, 0, capture.getPendingIntent());
mManager.setTestProviderLocation(TEST_PROVIDER, loc);
assertThat(capture.getNextLocation(TIMEOUT_MS)).isNearby(loc, mMaxCoarseFudgeDistanceM);
assertCoarseLocationIsNearby(capture.getNextLocation(TIMEOUT_MS), loc);
}
}

private void assertCoarseLocationIsNearby(Location coarseLocation, Location fineLocation) {
assertNotNull(coarseLocation);
float cellEdgeMeters = coarseLocation.getAccuracy();
float approximateCellDiagonalMeters = (float) Math.hypot(cellEdgeMeters, cellEdgeMeters);
float distanceAllowanceMeters =
approximateCellDiagonalMeters + mCoarseLocationOffsetScaleMeters;
assertThat(coarseLocation).isNearby(fineLocation, distanceAllowanceMeters);
}

@Test
public void testGetProviders() {
List<String> providers = mManager.getProviders(false);
Expand Down
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