Add test for GsmAlphabet
The tests were mostly copyed from telephony/GsmAlphabetTest
Bug: 244258879
Test: atest GsmAlphabetTest
Tag: #refactor
Change-Id: I422077cae82021335464b936d5b8362fba783ab6
diff --git a/android/app/tests/unit/src/com/android/bluetooth/util/GsmAlphabetTest.java b/android/app/tests/unit/src/com/android/bluetooth/util/GsmAlphabetTest.java
new file mode 100644
index 0000000..cb4fd61
--- /dev/null
+++ b/android/app/tests/unit/src/com/android/bluetooth/util/GsmAlphabetTest.java
@@ -0,0 +1,180 @@
+/*
+ * Copyright 2022 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.bluetooth.util;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.android.internal.telephony.uicc.IccUtils;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+@RunWith(JUnit4.class)
+public final class GsmAlphabetTest {
+
+ private static final String GSM_EXTENDED_CHARS = "{|}\\[~]\f\u20ac";
+
+ @Test
+ public void gsm7BitPackedToString() throws Exception {
+ byte[] packed;
+ StringBuilder testString = new StringBuilder(300);
+
+ packed = com.android.internal.telephony.GsmAlphabet.stringToGsm7BitPacked(
+ testString.toString());
+ assertThat(GsmAlphabet.gsm7BitPackedToString(packed, 1, 0xff & packed[0], 0, 0, 0))
+ .isEqualTo(testString.toString());
+
+ // Check all alignment cases
+ for (int i = 0; i < 9; i++, testString.append('@')) {
+ packed = com.android.internal.telephony.GsmAlphabet.stringToGsm7BitPacked(
+ testString.toString());
+ assertThat(GsmAlphabet.gsm7BitPackedToString(packed, 1, 0xff & packed[0], 0, 0, 0))
+ .isEqualTo(testString.toString());
+ }
+
+ // Test extended chars too
+ testString.append(GSM_EXTENDED_CHARS);
+ packed = com.android.internal.telephony.GsmAlphabet.stringToGsm7BitPacked(
+ testString.toString());
+ assertThat(GsmAlphabet.gsm7BitPackedToString(packed, 1, 0xff & packed[0], 0, 0, 0))
+ .isEqualTo(testString.toString());
+
+ // Try 254 septets with 127 extended chars
+ testString.setLength(0);
+ for (int i = 0; i < (255 / 2); i++) {
+ testString.append('{');
+ }
+ packed = com.android.internal.telephony.GsmAlphabet.stringToGsm7BitPacked(
+ testString.toString());
+ assertThat(GsmAlphabet.gsm7BitPackedToString(packed, 1, 0xff & packed[0], 0, 0, 0))
+ .isEqualTo(testString.toString());
+
+ // Reserved for extension to extension table (mapped to space)
+ packed = new byte[]{(byte)(0x1b | 0x80), 0x1b >> 1};
+ assertThat(GsmAlphabet.gsm7BitPackedToString(packed, 0, 2, 0, 0, 0)).isEqualTo(" ");
+
+ // Unmappable (mapped to character in default alphabet table)
+ packed[0] = 0x1b;
+ packed[1] = 0x00;
+ assertThat(GsmAlphabet.gsm7BitPackedToString(packed, 0, 2, 0, 0, 0)).isEqualTo("@");
+ packed[0] = (byte)(0x1b | 0x80);
+ packed[1] = (byte)(0x7f >> 1);
+ assertThat(GsmAlphabet.gsm7BitPackedToString(packed, 0, 2, 0, 0, 0)).isEqualTo("\u00e0");
+ }
+
+ @Test
+ public void stringToGsm8BitPacked() throws Exception {
+ byte unpacked[];
+ unpacked = IccUtils.hexStringToBytes("566F696365204D61696C");
+ assertThat(IccUtils.bytesToHexString(GsmAlphabet.stringToGsm8BitPacked("Voice Mail")))
+ .isEqualTo(IccUtils.bytesToHexString(unpacked));
+
+ unpacked = GsmAlphabet.stringToGsm8BitPacked(GSM_EXTENDED_CHARS);
+ // two bytes for every extended char
+ assertThat(unpacked.length).isEqualTo(2 * GSM_EXTENDED_CHARS.length());
+ }
+
+ @Test
+ public void stringToGsm8BitUnpackedField() throws Exception {
+ byte unpacked[];
+ // Test truncation of unaligned extended chars
+ unpacked = new byte[3];
+ GsmAlphabet.stringToGsm8BitUnpackedField(GSM_EXTENDED_CHARS, unpacked,
+ 0, unpacked.length);
+
+ // Should be one extended char and an 0xff at the end
+ assertThat(0xff & unpacked[2]).isEqualTo(0xff);
+ assertThat(com.android.internal.telephony.GsmAlphabet.gsm8BitUnpackedToString(
+ unpacked, 0, unpacked.length)).isEqualTo(GSM_EXTENDED_CHARS.substring(0, 1));
+
+ // Test truncation of normal chars
+ unpacked = new byte[3];
+ GsmAlphabet.stringToGsm8BitUnpackedField("abcd", unpacked,
+ 0, unpacked.length);
+
+ assertThat(com.android.internal.telephony.GsmAlphabet.gsm8BitUnpackedToString(
+ unpacked, 0, unpacked.length)).isEqualTo("abc");
+
+ // Test truncation of mixed normal and extended chars
+ unpacked = new byte[3];
+ GsmAlphabet.stringToGsm8BitUnpackedField("a{cd", unpacked,
+ 0, unpacked.length);
+
+ assertThat(com.android.internal.telephony.GsmAlphabet.gsm8BitUnpackedToString(
+ unpacked, 0, unpacked.length)).isEqualTo("a{");
+
+ // Test padding after normal char
+ unpacked = new byte[3];
+ GsmAlphabet.stringToGsm8BitUnpackedField("a", unpacked,
+ 0, unpacked.length);
+
+ assertThat(com.android.internal.telephony.GsmAlphabet.gsm8BitUnpackedToString(
+ unpacked, 0, unpacked.length)).isEqualTo("a");
+
+ assertThat(0xff & unpacked[1]).isEqualTo(0xff);
+ assertThat(0xff & unpacked[2]).isEqualTo(0xff);
+
+ // Test malformed input -- escape char followed by end of field
+ unpacked[0] = 0;
+ unpacked[1] = 0;
+ unpacked[2] = GsmAlphabet.GSM_EXTENDED_ESCAPE;
+
+ assertThat(com.android.internal.telephony.GsmAlphabet.gsm8BitUnpackedToString(
+ unpacked, 0, unpacked.length)).isEqualTo("@@");
+
+ // non-zero offset
+ assertThat(com.android.internal.telephony.GsmAlphabet.gsm8BitUnpackedToString(
+ unpacked, 1, unpacked.length - 1)).isEqualTo("@");
+
+ // test non-zero offset
+ unpacked[0] = 0;
+ GsmAlphabet.stringToGsm8BitUnpackedField("abcd", unpacked,
+ 1, unpacked.length - 1);
+
+
+ assertThat(unpacked[0]).isEqualTo(0);
+
+ assertThat(com.android.internal.telephony.GsmAlphabet.gsm8BitUnpackedToString(
+ unpacked, 1, unpacked.length - 1)).isEqualTo("ab");
+
+ // test non-zero offset with truncated extended char
+ unpacked[0] = 0;
+
+ GsmAlphabet.stringToGsm8BitUnpackedField("a{", unpacked,
+ 1, unpacked.length - 1);
+
+ assertThat(unpacked[0]).isEqualTo(0);
+
+ assertThat(com.android.internal.telephony.GsmAlphabet.gsm8BitUnpackedToString(
+ unpacked, 1, unpacked.length - 1)).isEqualTo("a");
+
+ // Reserved for extension to extension table (mapped to space)
+ unpacked[0] = 0x1b;
+ unpacked[1] = 0x1b;
+ assertThat(com.android.internal.telephony.GsmAlphabet.gsm8BitUnpackedToString(
+ unpacked, 0, 2)).isEqualTo(" ");
+
+ // Unmappable (mapped to character in default or national locking shift table)
+ unpacked[1] = 0x00;
+ assertThat(com.android.internal.telephony.GsmAlphabet.gsm8BitUnpackedToString(
+ unpacked, 0, 2)).isEqualTo("@");
+ unpacked[1] = 0x7f;
+ assertThat(com.android.internal.telephony.GsmAlphabet.gsm8BitUnpackedToString(
+ unpacked, 0, 2)).isEqualTo("\u00e0");
+ }
+}
