BIGTOP-4335: Add ut cases for utils classes in common module

bigtop-manager-common/src/main/java/org/apache/bigtop/manager/common/utils/ProjectPathUtils.java

@@ -74,7 +74,7 @@ private static String getProjectBaseDir() {
         }
     }
 
-    private static String getProjectStoreDir() {
+    protected static String getProjectStoreDir() {
         String path = SystemUtils.getUserHome().getPath() + File.separator + ".bigtop-manager";
         Path p = Paths.get(path);
         if (!Files.exists(p)) {

bigtop-manager-common/src/test/java/org/apache/bigtop/manager/common/utils/CaseUtilsTest.java

@@ -0,0 +1,81 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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
+ *
+ *    https://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 org.apache.bigtop.manager.common.utils;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+public class CaseUtilsTest {
+
+    @Test
+    public void testToLowerCase() {
+        // Normal case
+        assertEquals("hello world", CaseUtils.toLowerCase("Hello World"));
+        // Input is an empty string
+        assertEquals("", CaseUtils.toLowerCase(""));
+        // Input is null
+        assertNull(CaseUtils.toLowerCase(null));
+    }
+
+    @Test
+    public void testToUpperCase() {
+        // Normal case
+        assertEquals("HELLO WORLD", CaseUtils.toUpperCase("Hello World"));
+        // Input is an empty string
+        assertEquals("", CaseUtils.toUpperCase(""));
+        // Input is null
+        assertNull(CaseUtils.toUpperCase(null));
+    }
+
+    @Test
+    public void testToCamelCase() {
+        // Normal case
+        assertEquals("HelloWorld", CaseUtils.toCamelCase("hello-world"));
+        // Using underscore separator
+        assertEquals("HelloWorld", CaseUtils.toCamelCase("hello_world", CaseUtils.SEPARATOR_UNDERSCORE));
+        // First letter lowercase
+        assertEquals("helloWorld", CaseUtils.toCamelCase("hello-world", CaseUtils.SEPARATOR_HYPHEN, false));
+        // Input is an empty string
+        assertEquals("", CaseUtils.toCamelCase(""));
+        // Input is null
+        assertNull(CaseUtils.toCamelCase(null));
+    }
+
+    @Test
+    public void testToHyphenCase() {
+        // Normal case
+        assertEquals("hello-world", CaseUtils.toHyphenCase("HelloWorld"));
+        // Input is an empty string
+        assertEquals("", CaseUtils.toHyphenCase(""));
+        // Input is null
+        assertNull(CaseUtils.toHyphenCase(null));
+    }
+
+    @Test
+    public void testToUnderScoreCase() {
+        // Normal case
+        assertEquals("hello_world", CaseUtils.toUnderScoreCase("HelloWorld"));
+        // Input is an empty string
+        assertEquals("", CaseUtils.toUnderScoreCase(""));
+        // Input is null
+        assertNull(CaseUtils.toUnderScoreCase(null));
+    }
+}

bigtop-manager-common/src/test/java/org/apache/bigtop/manager/common/utils/ClassUtilsTest.java

@@ -0,0 +1,98 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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
+ *
+ *    https://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 org.apache.bigtop.manager.common.utils;
+
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.Field;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class ClassUtilsTest {
+
+    // Test case for a normal class
+    @Test
+    public void testGetFieldsNormalClass() {
+        List<Field> fields = ClassUtils.getFields(TestClass.class);
+        assertEquals(3, fields.size());
+    }
+
+    // Test case for a class with no fields
+    @Test
+    public void testGetFieldsNoFieldsClass() {
+        List<Field> fields = ClassUtils.getFields(NoFieldsClass.class);
+        assertEquals(0, fields.size());
+    }
+
+    // Test case for an inherited class
+    @Test
+    public void testGetFieldsInheritedClass() {
+        List<Field> fields = ClassUtils.getFields(InheritedClass.class);
+        assertEquals(5, fields.size());
+    }
+
+    // Test case for an interface
+    @Test
+    public void testGetFieldsInterface() {
+        List<Field> fields = ClassUtils.getFields(TestInterface.class);
+        assertEquals(0, fields.size());
+    }
+
+    // Test case for null input
+    @Test
+    public void testGetFieldsNullInput() {
+        List<Field> fields = ClassUtils.getFields(null);
+        assertEquals(0, fields.size());
+    }
+
+    // Test case for a primitive type
+    @Test
+    public void testGetFieldsPrimitiveType() {
+        List<Field> fields = ClassUtils.getFields(int.class);
+        assertEquals(0, fields.size()); // int is a primitive type, which has no fields
+    }
+
+    // Test case for a wrapper type
+    @Test
+    public void testGetFieldsWrapperType() {
+        List<Field> fields = ClassUtils.getFields(Integer.class);
+        assertTrue(fields.size() > 0);
+    }
+
+    // Helper test class
+    private static class TestClass {
+        private int field1;
+        private String field2;
+        private double field3;
+    }
+
+    // Helper test class with no fields
+    private static class NoFieldsClass {}
+
+    // Helper test class that inherits from TestClass
+    private static class InheritedClass extends TestClass {
+        private boolean field4;
+        private char field5;
+    }
+
+    // Helper test interface
+    private static interface TestInterface {}
+}

bigtop-manager-common/src/test/java/org/apache/bigtop/manager/common/utils/DateUtilsTest.java

@@ -0,0 +1,87 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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
+ *
+ *    https://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 org.apache.bigtop.manager.common.utils;
+
+import org.junit.jupiter.api.Test;
+
+import java.sql.Timestamp;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.TimeZone;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class DateUtilsTest {
+
+    @Test
+    public void testFormatTimestamp() {
+        Timestamp timestamp = Timestamp.valueOf("2023-01-01 12:00:00");
+
+        String formatted = DateUtils.format(timestamp);
+        assertEquals("2023-01-01 12:00:00", formatted);
+
+        String customFormatted = DateUtils.format(timestamp, "yyyy-MM-dd");
+        assertEquals("2023-01-01", customFormatted);
+    }
+
+    @Test
+    public void testFormatDate() {
+        Date date = new Date(1672545600000L);
+        TimeZone systemTimeZone = TimeZone.getDefault();
+
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+        sdf.setTimeZone(systemTimeZone);
+        String expectedFormatted = sdf.format(date);
+        String formatted = DateUtils.format(date);
+        assertEquals(expectedFormatted, formatted);
+
+        SimpleDateFormat sdfSystem = new SimpleDateFormat("yyyy-MM-dd");
+        sdfSystem.setTimeZone(systemTimeZone);
+        String expectedCustomFormatted = sdfSystem.format(date);
+        String customFormatted = DateUtils.format(date, "yyyy-MM-dd");
+        assertEquals(expectedCustomFormatted, customFormatted);
+    }
+
+    @Test
+    public void testFormatNullTimestamp() {
+        String formatted = DateUtils.format((Timestamp) null);
+        assertEquals("", formatted);
+    }
+
+    @Test
+    public void testFormatNullDate() {
+        String formatted = DateUtils.format((Date) null);
+        assertEquals("", formatted);
+    }
+
+    @Test
+    public void testFormatWithNullPattern() {
+        Date date = new Date(1672531200000L);
+        assertThrows(NullPointerException.class, () -> {
+            DateUtils.format(date, null);
+        });
+    }
+
+    @Test
+    public void testFormatWithEmptyStringWhenDateIsNull() {
+        String result = DateUtils.format((Date) null, "yyyy-MM-dd HH:mm:ss");
+        assertEquals("", result);
+    }
+}

bigtop-manager-common/src/test/java/org/apache/bigtop/manager/common/utils/FileUtilsTest.java

@@ -0,0 +1,102 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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
+ *
+ *    https://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 org.apache.bigtop.manager.common.utils;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class FileUtilsTest {
+    private File testFile;
+
+    @BeforeEach
+    void setUp() throws IOException {
+        // Create a test file
+        testFile = new File("testFile.txt");
+        try (FileWriter writer = new FileWriter(testFile, StandardCharsets.UTF_8)) {
+            writer.write("test file content");
+        }
+    }
+
+    @AfterEach
+    void tearDown() {
+        // Delete test file
+        if (testFile.exists()) {
+            testFile.delete();
+        }
+    }
+
+    @Test
+    void readFile2StrNormalCase() {
+        // Test normal case
+        String result = FileUtils.readFile2Str(testFile);
+        assertEquals("test file content", result);
+    }
+
+    @Test
+    void readFile2StrEmptyFile() throws IOException {
+        // Test empty file
+        try (FileWriter writer = new FileWriter(testFile, StandardCharsets.UTF_8)) {
+            writer.write("");
+        }
+        String result = FileUtils.readFile2Str(testFile);
+        assertEquals("", result);
+    }
+
+    @Test
+    void readFile2StrFileDoesNotExist() {
+        // Test file does not exist case
+        File nonExistentFile = new File("nonExistentFile.txt");
+        Exception exception = assertThrows(RuntimeException.class, () -> {
+            FileUtils.readFile2Str(nonExistentFile);
+        });
+        assertNotNull(exception);
+        assertTrue(exception.getMessage().contains("nonExistentFile.txt"));
+    }
+
+    @Test
+    void readFile2StrFileContainsSpecialCharacters() throws IOException {
+        // Test file containing special characters
+        try (FileWriter writer = new FileWriter(testFile, StandardCharsets.UTF_8)) {
+            writer.write("test file content\nwith newline\tand tab");
+        }
+        String result = FileUtils.readFile2Str(testFile);
+        assertEquals("test file content\nwith newline\tand tab", result);
+    }
+
+    @Test
+    void readFile2StrFileContainsChineseCharacters() throws IOException {
+        // Test file containing Chinese characters
+        try (FileWriter writer = new FileWriter(testFile, StandardCharsets.UTF_8)) {
+            writer.write("测试文件内容");
+        }
+        String result = FileUtils.readFile2Str(testFile);
+        assertEquals("测试文件内容", result);
+    }
+}