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Validating YAML Line Parsing Implementation in Apktool

This test suite validates YAML parsing functionality in the Apktool library, focusing on line-by-line YAML content analysis. It ensures proper handling of YAML syntax elements including empty lines, comments, key-value pairs, and list items.

Test Coverage Overview

The test suite provides comprehensive coverage of YAML line parsing functionality.

Empty line detection and indentation handling
Comment parsing and extraction
Key-value pair parsing with various formats
List item identification and processing
Edge cases including special characters and whitespace handling

Implementation Analysis

The testing approach uses JUnit framework with systematic test case organization. Each test method focuses on a specific YAML line type, utilizing the YamlLine class to parse and validate different components.

The implementation leverages JUnit’s assertion methods for verification, with careful attention to indentation levels, key-value extraction, and special character handling.

Technical Details

Testing Framework: JUnit
Base Class: BaseTest
Test Subject: YamlLine class
Key Methods: isEmpty, isComment, getKey(), getValue()
Assertion Types: assertEquals, assertTrue, assertFalse

Best Practices Demonstrated

The test suite demonstrates several testing best practices.

Atomic test methods focusing on single functionality
Clear test method naming conventions
Comprehensive edge case coverage
Consistent assertion patterns
Well-organized test structure extending from BaseTest

ibotpeaches/apktool

brut.apktool/apktool-lib/src/test/java/brut/androlib/apk/YamlLineTest.java

            
/*
 *  Copyright (C) 2010 Ryszard Wiśniewski <[email protected]>
 *  Copyright (C) 2010 Connor Tumbleson <[email protected]>
 *
 *  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
 *
 *       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 brut.androlib.apk;

import brut.androlib.BaseTest;

import org.junit.*;
import static org.junit.Assert.*;

public class YamlLineTest extends BaseTest {

    @Test
    public void testEmptyLine() {
        YamlLine line = new YamlLine("");
        assertEquals(0, line.indent);
        assertTrue(line.isEmpty);

        line = new YamlLine(" ");
        assertEquals(0, line.indent);
        assertTrue(line.isEmpty);
    }

    @Test
    public void testComment() {
        YamlLine line = new YamlLine("!ApkInfo.class");
        assertTrue(line.isComment);

        line = new YamlLine("# This is comment");
        assertEquals(0, line.indent);
        assertTrue(line.isComment);
        assertEquals("", line.getKey());
        assertEquals("This is comment", line.getValue());

        line = new YamlLine("  # This is comment");
        assertEquals(2, line.indent);
        assertTrue(line.isComment);
        assertEquals("", line.getKey());
        assertEquals("This is comment", line.getValue());
    }

    @Test
    public void testKeyLine() {
        YamlLine line = new YamlLine("name:");
        assertFalse(line.isComment);
        assertEquals(0, line.indent);
        assertEquals("name", line.getKey());
        assertEquals("", line.getValue());

        line = new YamlLine("  name:");
        assertFalse(line.isComment);
        assertEquals(2, line.indent);
        assertEquals("name", line.getKey());
        assertEquals("", line.getValue());

        line = new YamlLine(":value");
        assertFalse(line.isComment);
        assertEquals(0, line.indent);
        assertEquals("", line.getKey());
        assertEquals("value", line.getValue());

        line = new YamlLine("  : value ");
        assertFalse(line.isComment);
        assertEquals(2, line.indent);
        assertEquals("", line.getKey());
        assertEquals("value", line.getValue());

        line = new YamlLine("name  : value ");
        assertFalse(line.isComment);
        assertEquals(0, line.indent);
        assertEquals("name", line.getKey());
        assertEquals("value", line.getValue());

        line = new YamlLine("  name  : value ");
        assertFalse(line.isComment);
        assertEquals(2, line.indent);
        assertEquals("name", line.getKey());
        assertEquals("value", line.getValue());

        line = new YamlLine("  name  : value ::");
        assertFalse(line.isComment);
        assertEquals(2, line.indent);
        assertEquals("name", line.getKey());
        assertEquals("value", line.getValue());

        // split this gives parts.length = 0!!
        line = new YamlLine(":::");
        assertFalse(line.isComment);
        assertEquals(0, line.indent);
        assertEquals("", line.getKey());
        assertEquals("", line.getValue());
    }

    @Test
    public void testItemLine() {
        YamlLine line = new YamlLine("- val1");
        assertTrue(line.isItem);
        assertEquals(0, line.indent);
        assertEquals("", line.getKey());
        assertEquals("val1", line.getValue());

        line = new YamlLine("  - val1: ff");
        assertTrue(line.isItem);
        assertEquals(2, line.indent);
        assertEquals("", line.getKey());
        assertEquals("val1: ff", line.getValue());
    }
}