diff --git a/tests/unit/src/com/android/settings/network/SubscriptionUtilTest.java b/tests/unit/src/com/android/settings/network/SubscriptionUtilTest.java
new file mode 100644
index 00000000000..9e319fb6ac8
--- /dev/null
+++ b/tests/unit/src/com/android/settings/network/SubscriptionUtilTest.java
@@ -0,0 +1,132 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.network;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.telephony.SubscriptionInfo;
+import android.telephony.SubscriptionManager;
+import android.telephony.TelephonyManager;
+
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.util.Arrays;
+import java.util.List;
+
+@RunWith(AndroidJUnit4.class)
+public class SubscriptionUtilTest {
+
+    private Context mContext;
+    @Mock
+    private SubscriptionManager mSubMgr;
+    @Mock
+    private TelephonyManager mTelMgr;
+
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mContext = spy(ApplicationProvider.getApplicationContext());
+        when(mContext.getSystemService(SubscriptionManager.class)).thenReturn(mSubMgr);
+        when(mContext.getSystemService(TelephonyManager.class)).thenReturn(mTelMgr);
+        when(mTelMgr.getUiccSlotsInfo()).thenReturn(null);
+    }
+
+    @Test
+    public void getAvailableSubscriptions_nullInfoFromSubscriptionManager_nonNullResult() {
+        when(mSubMgr.getAvailableSubscriptionInfoList()).thenReturn(null);
+
+        final List<SubscriptionInfo> subs = SubscriptionUtil.getAvailableSubscriptions(mContext);
+
+        assertThat(subs).isNotNull();
+        assertThat(subs).isEmpty();
+    }
+
+    @Test
+    public void getAvailableSubscriptions_oneSubscription_oneResult() {
+        final SubscriptionInfo info = mock(SubscriptionInfo.class);
+        when(mSubMgr.getAvailableSubscriptionInfoList()).thenReturn(Arrays.asList(info));
+
+        final List<SubscriptionInfo> subs = SubscriptionUtil.getAvailableSubscriptions(mContext);
+
+        assertThat(subs).isNotNull();
+        assertThat(subs).hasSize(1);
+    }
+
+    @Test
+    public void getAvailableSubscriptions_twoSubscriptions_twoResults() {
+        final SubscriptionInfo info1 = mock(SubscriptionInfo.class);
+        final SubscriptionInfo info2 = mock(SubscriptionInfo.class);
+        when(mSubMgr.getAvailableSubscriptionInfoList()).thenReturn(Arrays.asList(info1, info2));
+
+        final List<SubscriptionInfo> subs = SubscriptionUtil.getAvailableSubscriptions(mContext);
+
+        assertThat(subs).isNotNull();
+        assertThat(subs).hasSize(2);
+    }
+
+    @Test
+    public void getActiveSubscriptions_nullInfoFromSubscriptionManager_nonNullResult() {
+        when(mSubMgr.getActiveSubscriptionInfoList()).thenReturn(null);
+
+        final List<SubscriptionInfo> subs = SubscriptionUtil.getActiveSubscriptions(mSubMgr);
+
+        assertThat(subs).isNotNull();
+        assertThat(subs).isEmpty();
+    }
+
+    @Test
+    public void getActiveSubscriptions_oneSubscription_oneResult() {
+        final SubscriptionInfo info = mock(SubscriptionInfo.class);
+        when(mSubMgr.getActiveSubscriptionInfoList()).thenReturn(Arrays.asList(info));
+
+        final List<SubscriptionInfo> subs = SubscriptionUtil.getActiveSubscriptions(mSubMgr);
+
+        assertThat(subs).isNotNull();
+        assertThat(subs).hasSize(1);
+    }
+
+    @Test
+    public void getActiveSubscriptions_twoSubscriptions_twoResults() {
+        final SubscriptionInfo info1 = mock(SubscriptionInfo.class);
+        final SubscriptionInfo info2 = mock(SubscriptionInfo.class);
+        when(mSubMgr.getActiveSubscriptionInfoList()).thenReturn(
+                Arrays.asList(info1, info2));
+
+        final List<SubscriptionInfo> subs = SubscriptionUtil.getActiveSubscriptions(mSubMgr);
+
+        assertThat(subs).isNotNull();
+        assertThat(subs).hasSize(2);
+    }
+
+    @Test
+    public void isInactiveInsertedPSim_nullSubInfo_doesNotCrash() {
+        assertThat(SubscriptionUtil.isInactiveInsertedPSim(null)).isFalse();
+    }
+}