Merge pull request #3579 from Isira-Seneviratne/Add_tests_for_BOINCUtils

[Android] Add unit tests for BOINCUtils.

android/BOINC/app/build.gradle

@@ -90,20 +90,20 @@ android {
 }
 
 ext.powermock_version = '2.0.5'
-ext.lombok_version = '1.18.12'
 
 dependencies {
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
-    implementation "androidx.core:core-ktx:1.2.0"
-    implementation 'org.apache.commons:commons-lang3:3.9'
+    implementation 'androidx.core:core-ktx:1.2.0'
+    implementation 'org.apache.commons:commons-lang3:3.10'
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation 'org.eclipse.collections:eclipse-collections:10.2.0'
 
+    testImplementation 'com.google.guava:guava-testlib:28.2-jre'
+    testImplementation 'commons-io:commons-io:2.6'
     testImplementation 'junit:junit:4.13'
     testImplementation "org.powermock:powermock-module-junit4:$powermock_version"
     testImplementation "org.powermock:powermock-api-mockito2:$powermock_version"
-    testImplementation 'com.google.guava:guava-testlib:28.2-jre'
     testImplementation "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"
 }
 repositories {

android/BOINC/app/src/test/java/edu/berkeley/boinc/utils/BOINCUtilsTest.java

@@ -0,0 +1,93 @@
+/*
+ * This file is part of BOINC.
+ * http://boinc.berkeley.edu
+ * Copyright (C) 2020 University of California
+ *
+ * BOINC is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * BOINC is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with BOINC.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package edu.berkeley.boinc.utils;
+
+import org.apache.commons.io.input.CharSequenceReader;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.io.Reader;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+
+public class BOINCUtilsTest {
+    private StringBuilder stringBuilder;
+    private Reader reader;
+
+    @Before
+    public void setUp() {
+        stringBuilder = new StringBuilder("This is a string.");
+        reader = new CharSequenceReader(stringBuilder);
+    }
+
+    @Test
+    public void testReadLineLimit_whenReaderIsNullAndLimitIs0_thenExpectEmptyString()
+            throws IOException {
+        String result = BOINCUtils.readLineLimit(null, 0);
+
+        assertNotNull(result);
+        assertTrue(result.isEmpty());
+    }
+
+    @Test(expected = NullPointerException.class)
+    public void testReadLineLimit_whenReaderIsNullAndLimitIs1_thenExpectNullPointerException()
+            throws IOException {
+        BOINCUtils.readLineLimit(null, 1);
+    }
+
+    @Test
+    public void testReadLineLimit_whenReaderHasEmptyStringAndLimitIs1_thenExpectNull()
+            throws IOException {
+        stringBuilder.setLength(0);
+
+        assertNull(BOINCUtils.readLineLimit(reader, 1));
+    }
+
+    @Test
+    public void testReadLineLimit_whenReaderHasNonEmptyStringAndLimitIsLengthOfString_thenExpectReaderString()
+            throws IOException {
+        assertEquals(BOINCUtils.readLineLimit(reader, stringBuilder.length()), "This is a string.");
+    }
+
+    @Test
+    public void testReadLineLimit_whenReaderHasNonEmptyStringAndLimitIsLengthOfStringPlus1_thenExpectReaderString()
+            throws IOException {
+        assertEquals(BOINCUtils.readLineLimit(reader, stringBuilder.length() + 1), "This is a string.");
+    }
+
+    @Test
+    public void testReadLineLimit_whenReaderHasStringWithNewlineAndLimitIsLengthOfString_thenExpectStringWithoutNewline()
+            throws IOException {
+        stringBuilder.setCharAt(4, '\n');
+
+        assertEquals(BOINCUtils.readLineLimit(reader, stringBuilder.length()), "This");
+    }
+
+    @Test
+    public void testReadLineLimit_whenReaderHasStringWithCarriageReturnAndLimitIsLengthOfString_thenExpectStringWithoutCarriageReturn()
+            throws IOException {
+        stringBuilder.setCharAt(4, '\r');
+
+        assertEquals(BOINCUtils.readLineLimit(reader, stringBuilder.length()), "This");
+    }
+}