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diff --git a/tests/unit/src/com/android/car/calendar/common/EventDescriptionsTest.java b/tests/unit/src/com/android/car/calendar/common/EventDescriptionsTest.java
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+++ b/tests/unit/src/com/android/car/calendar/common/EventDescriptionsTest.java
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+/*
+ * Copyright 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.car.calendar.common;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.net.Uri;
+
+import com.google.common.collect.Iterables;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.UnsupportedEncodingException;
+import java.util.List;
+import java.util.Locale;
+
+public class EventDescriptionsTest {
+
+    private static final String BASE_NUMBER = "30 303986300";
+    private static final String LOCAL_NUMBER = "0" + BASE_NUMBER;
+    private static final String INTERNATIONAL_NUMBER = "+49 " + BASE_NUMBER;
+    private static final String ACCESS = ",,12;3*45#";
+    private EventDescriptions mEventDescriptions;
+
+    @Before
+    public void setUp() {
+        mEventDescriptions = new EventDescriptions(Locale.GERMANY);
+    }
+
+    @Test
+    public void extractNumberAndPin_localNumber_resultIsLocal() {
+        List<Dialer.NumberAndAccess> numberAndAccesses =
+                mEventDescriptions.extractNumberAndPins(LOCAL_NUMBER);
+        assertThat(numberAndAccesses).isNotEmpty();
+        Dialer.NumberAndAccess numberAndAccess = Iterables.getFirst(numberAndAccesses, null);
+        assertThat(numberAndAccess.getNumber()).isEqualTo(INTERNATIONAL_NUMBER);
+    }
+
+    @Test
+    public void extractNumberAndPin_internationalNumber_resultIsLocal() {
+        List<Dialer.NumberAndAccess> numberAndAccesses =
+                mEventDescriptions.extractNumberAndPins(INTERNATIONAL_NUMBER);
+        assertThat(numberAndAccesses).isNotEmpty();
+        Dialer.NumberAndAccess numberAndAccess = Iterables.getFirst(numberAndAccesses, null);
+        assertThat(numberAndAccess.getNumber()).isEqualTo(INTERNATIONAL_NUMBER);
+    }
+
+    @Test
+    public void extractNumberAndPin_internationalNumberWithDifferentLocale_resultIsInternational() {
+        mEventDescriptions = new EventDescriptions(Locale.FRANCE);
+        List<Dialer.NumberAndAccess> numberAndAccesses =
+                mEventDescriptions.extractNumberAndPins(INTERNATIONAL_NUMBER);
+        assertThat(numberAndAccesses).isNotEmpty();
+        Dialer.NumberAndAccess numberAndAccess = Iterables.getFirst(numberAndAccesses, null);
+        assertThat(numberAndAccess.getNumber()).isEqualTo(INTERNATIONAL_NUMBER);
+    }
+
+    @Test
+    public void extractNumberAndPin_internationalNumberAndPin() {
+        String input = INTERNATIONAL_NUMBER + " PIN: " + ACCESS;
+        List<Dialer.NumberAndAccess> numberAndAccesses =
+                mEventDescriptions.extractNumberAndPins(input);
+        assertThat(numberAndAccesses).isNotEmpty();
+        Dialer.NumberAndAccess numberAndAccess = Iterables.getFirst(numberAndAccesses, null);
+        assertThat(numberAndAccess.getNumber()).isEqualTo(INTERNATIONAL_NUMBER);
+        assertThat(numberAndAccess.getAccess()).isEqualTo(ACCESS);
+    }
+
+    @Test
+    public void extractNumberAndPin_internationalNumberAndCode() {
+        String input = INTERNATIONAL_NUMBER + " with access code " + ACCESS;
+        List<Dialer.NumberAndAccess> numberAndAccesses =
+                mEventDescriptions.extractNumberAndPins(input);
+        assertThat(numberAndAccesses).isNotEmpty();
+        Dialer.NumberAndAccess numberAndAccess = Iterables.getFirst(numberAndAccesses, null);
+        assertThat(numberAndAccess.getNumber()).isEqualTo(INTERNATIONAL_NUMBER);
+        assertThat(numberAndAccess.getAccess()).isEqualTo(ACCESS);
+    }
+
+    @Test
+    public void extractNumberAndPin_multipleNumbers() {
+        String input =
+                INTERNATIONAL_NUMBER
+                        + " PIN: "
+                        + ACCESS
+                        + "\n  an invalid one is "
+                        + BASE_NUMBER
+                        + " but a local one is "
+                        + LOCAL_NUMBER;
+        List<Dialer.NumberAndAccess> numberAndAccesses =
+                mEventDescriptions.extractNumberAndPins(input);
+
+        // The local number is valid but repeated so only included once.
+        assertThat(numberAndAccesses).hasSize(1);
+    }
+
+    @Test
+    public void extractNumberAndPin_encodedTelFormat() throws UnsupportedEncodingException {
+        String encoded = Uri.encode(INTERNATIONAL_NUMBER + ACCESS);
+        String input = "blah blah <tel:" + encoded + "> blah blah";
+        List<Dialer.NumberAndAccess> numberAndAccesses =
+                mEventDescriptions.extractNumberAndPins(input);
+        assertThat(numberAndAccesses).hasSize(1);
+        Dialer.NumberAndAccess numberAndAccess = Iterables.getFirst(numberAndAccesses, null);
+        assertThat(numberAndAccess.getNumber()).isEqualTo(INTERNATIONAL_NUMBER);
+        assertThat(numberAndAccess.getAccess()).isEqualTo(ACCESS);
+    }
+
+    @Test
+    public void extractNumberAndPin_smallNumber_returnsNull() throws UnsupportedEncodingException {
+        String input = "blah blah 345 - blah blah";
+        List<Dialer.NumberAndAccess> numberAndAccesses =
+                mEventDescriptions.extractNumberAndPins(input);
+        assertThat(numberAndAccesses).isEmpty();
+    }
+}