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Testing Image Format Detection Implementation in AndroidUtilCode

This test suite validates the ImageUtils functionality in the AndroidUtilCode library, focusing on accurate image type detection across multiple formats. The suite ensures reliable identification of common image formats like JPG, PNG, GIF, and others through systematic unit testing.

Test Coverage Overview

The test coverage focuses on comprehensive image type detection functionality across 7 different image formats. Key test cases verify accurate identification of JPG, PNG, GIF, TIFF, BMP, WEBP, and ICO file types through the getImageType method. Each format is tested independently using predefined test images located in the TestConfig.PATH_IMAGE directory.

Tests all major image format types
Validates format detection accuracy
Covers standard image file extensions

Implementation Analysis

The testing approach employs JUnit’s assertion framework to verify the ImageUtils.getImageType method returns correct ImageType enum values for each format. The implementation follows a clear pattern of individual assertions for each image type, using consistent file naming and path construction. The test structure leverages JUnit’s @Test annotation for automated test execution.

Uses JUnit assertion framework
Individual test cases per format
Standardized file naming convention

Technical Details

Testing infrastructure includes:

JUnit 4 testing framework
TestConfig class for path management
Custom ImageType enum for format identification
Predefined test image files
BaseTest class extension for common functionality

Best Practices Demonstrated

The test suite exemplifies several testing best practices including clear test method naming, single responsibility principle in test cases, and comprehensive format coverage. The code organization maintains high readability with consistent assertion patterns and well-structured test resources.

Clear and descriptive test methods
Consistent assertion structure
Comprehensive format coverage
Well-organized test resources

blankj/androidutilcode

lib/utilcode/src/test/java/com/blankj/utilcode/util/ImageUtilsTest.java

            
package com.blankj.utilcode.util;

import org.junit.Assert;
import org.junit.Test;

/**
 * <pre>
 *     author: blankj
 *     blog  : http://blankj.com
 *     time  : 2019/08/25
 *     desc  : test ImageUtils
 * </pre>
 */
public class ImageUtilsTest extends BaseTest {

    @Test
    public void getImageType() {
        Assert.assertEquals(ImageUtils.ImageType.TYPE_JPG, ImageUtils.getImageType(TestConfig.PATH_IMAGE + "ic_launcher.jpg"));
        Assert.assertEquals(ImageUtils.ImageType.TYPE_PNG, ImageUtils.getImageType(TestConfig.PATH_IMAGE + "ic_launcher.png"));
        Assert.assertEquals(ImageUtils.ImageType.TYPE_GIF, ImageUtils.getImageType(TestConfig.PATH_IMAGE + "ic_launcher.gif"));
        Assert.assertEquals(ImageUtils.ImageType.TYPE_TIFF, ImageUtils.getImageType(TestConfig.PATH_IMAGE + "ic_launcher.tif"));
        Assert.assertEquals(ImageUtils.ImageType.TYPE_BMP, ImageUtils.getImageType(TestConfig.PATH_IMAGE + "ic_launcher.bmp"));
        Assert.assertEquals(ImageUtils.ImageType.TYPE_WEBP, ImageUtils.getImageType(TestConfig.PATH_IMAGE + "ic_launcher.webp"));
        Assert.assertEquals(ImageUtils.ImageType.TYPE_ICO, ImageUtils.getImageType(TestConfig.PATH_IMAGE + "ic_launcher.ico"));
    }
}