| /* |
| * Copyright (C) 2016 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.server.wifi.util; |
| |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| import android.support.test.filters.SmallTest; |
| |
| import org.junit.Test; |
| |
| /** |
| * Unit tests for {@link com.android.server.wifi.util.StringUtil}. |
| */ |
| @SmallTest |
| public class StringUtilTest { |
| static final byte ASCII_UNIT_SEPARATOR = 31; |
| static final byte ASCII_DEL = 127; |
| |
| /** Verifies that isAsciiPrintable() does not crash when passed a null array. */ |
| @Test |
| public void nullArrayDoesNotCauseCrash() { |
| assertTrue(StringUtil.isAsciiPrintable(null)); |
| } |
| |
| /** Verifies that isAsciiPrintable() considers an empty array to be printable. */ |
| @Test |
| public void emptyArrayIsPrintable() { |
| assertTrue(StringUtil.isAsciiPrintable(new byte[]{})); |
| } |
| |
| /** Verifies that isAsciiPrintable() considers a single printable byte to be printable. */ |
| @Test |
| public void arrayWithSinglePrintableByteIsPrintable() { |
| assertTrue(StringUtil.isAsciiPrintable(new byte[]{'a'})); |
| } |
| |
| /** |
| * Verifies that isAsciiPrintable() considers an array of multiple printable bytes to be |
| * printable. |
| */ |
| @Test |
| public void arrayWithMultiplePrintableBytesIsPrintable() { |
| assertTrue(StringUtil.isAsciiPrintable(new byte[]{'a', 'b'})); |
| } |
| |
| /** |
| * Verifies that isAsciiPrintable() considers bell, form feed, newline, horizontal tab, |
| * and vertical tab to be printable. |
| */ |
| @Test |
| public void printableControlCharactersAreConsideredPrintable() { |
| assertTrue(StringUtil.isAsciiPrintable(new byte[]{0x07})); // bell |
| assertTrue(StringUtil.isAsciiPrintable(new byte[]{'\f'})); // form feed |
| assertTrue(StringUtil.isAsciiPrintable(new byte[]{'\n'})); |
| assertTrue(StringUtil.isAsciiPrintable(new byte[]{'\t'})); |
| assertTrue(StringUtil.isAsciiPrintable(new byte[]{0x0b})); // vertical tab |
| } |
| |
| /** Verifies that isAsciiPrintable() considers a newline to be printable. */ |
| @Test |
| public void arrayWithNewlineIsPrintable() { |
| assertTrue(StringUtil.isAsciiPrintable(new byte[]{'\n'})); |
| } |
| |
| /** Verifies that isAsciiPrintable() considers a space to be printable. */ |
| @Test |
| public void arrayWithSpaceIsPrintable() { |
| assertTrue(StringUtil.isAsciiPrintable(new byte[]{' '})); |
| } |
| |
| /** Verifies that isAsciiPrintable() considers a tilde to be printable. */ |
| @Test |
| public void arrayWithTildeIsPrintable() { |
| assertTrue(StringUtil.isAsciiPrintable(new byte[]{'~'})); |
| } |
| |
| /** Verifies that isAsciiPrintable() considers a null to be unprintable. */ |
| @Test |
| public void arrayWithNullByteIsNotPrintable() { |
| assertFalse(StringUtil.isAsciiPrintable(new byte[]{0})); |
| } |
| |
| /** Verifies that isAsciiPrintable() considers (space-1) to be unprintable. */ |
| @Test |
| public void arrayWithUnitSeparatorIsNotPrintable() { |
| assertFalse(StringUtil.isAsciiPrintable(new byte[]{ASCII_UNIT_SEPARATOR})); |
| } |
| |
| /** Verifies that isAsciiPrintable() considers (tilde+1) to be unprintable. */ |
| @Test |
| public void arrayWithDelIsNotPrintable() { |
| assertFalse(StringUtil.isAsciiPrintable(new byte[]{ASCII_DEL})); |
| } |
| |
| /** |
| * Verifies that isAsciiPrintable() considers negative bytes to be unprintable. |
| * (In unsigned representation, these are values greater than DEL.) |
| */ |
| @Test |
| public void arrayWithNegativeByteIsNotPrintable() { |
| assertFalse(StringUtil.isAsciiPrintable(new byte[]{-128})); |
| assertFalse(StringUtil.isAsciiPrintable(new byte[]{-1})); |
| } |
| } |