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Merge pull request #125 from sam-wmd/feature/resize_augmentation_aspe…
…ct_ratio Added a constructor to ResizeAugmentation.java with scaleFactor
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77 changes: 77 additions & 0 deletions
77
lib/src/test/java/de/edux/augmentation/effects/AbstractAugmentationTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| package de.edux.augmentation.effects; | ||
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| import org.junit.jupiter.api.AfterEach; | ||
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| import javax.imageio.ImageIO; | ||
| import java.awt.image.BufferedImage; | ||
| import java.io.IOException; | ||
| import java.nio.file.Files; | ||
| import java.nio.file.Path; | ||
| import java.nio.file.Paths; | ||
| import java.util.Arrays; | ||
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| import static org.junit.jupiter.api.Assertions.*; | ||
| import static org.junit.jupiter.api.Assertions.assertTrue; | ||
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| public abstract class AbstractAugmentationTest { | ||
| protected BufferedImage originalImage; | ||
| protected BufferedImage augmentedImage; | ||
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| public void shouldHaveSameWidth() { | ||
| assertEquals( | ||
| originalImage.getWidth(), | ||
| augmentedImage.getWidth(), | ||
| "Augmented image width should match the specified width."); | ||
| } | ||
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| public void shouldHaveSameHeight() { | ||
| assertEquals( | ||
| originalImage.getHeight(), | ||
| augmentedImage.getHeight(), | ||
| "Augmented image height should match the specified height."); | ||
| } | ||
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| public void shouldHaveSamePixels() { | ||
| int[] originalPixels = | ||
| originalImage.getRGB( | ||
| 0, | ||
| 0, | ||
| originalImage.getWidth(), | ||
| originalImage.getHeight(), | ||
| null, | ||
| 0, | ||
| originalImage.getWidth()); | ||
| int[] augmentedPixels = | ||
| augmentedImage.getRGB( | ||
| 0, | ||
| 0, | ||
| augmentedImage.getWidth(), | ||
| augmentedImage.getHeight(), | ||
| null, | ||
| 0, | ||
| augmentedImage.getWidth()); | ||
| assertFalse( | ||
| Arrays.equals(originalPixels, augmentedPixels), | ||
| "The augmented image should differ from the original."); | ||
| } | ||
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| public void shouldNotBeNull() { | ||
| assertNotNull(augmentedImage, "Augmented image should not be null."); | ||
| } | ||
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| public void outputFileShouldExistAndNotBeEmpty() throws IOException { | ||
| Path outputPath = Paths.get("augmented.png"); | ||
| ImageIO.write(augmentedImage, "png", outputPath.toFile()); | ||
| assertTrue(Files.exists(outputPath), "Output image file should exist."); | ||
| assertTrue(Files.size(outputPath) > 0, "Output image file should not be empty."); | ||
| } | ||
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| @AfterEach | ||
| public void checkConformity() throws IOException { | ||
| shouldNotBeNull(); | ||
| shouldHaveSameWidth(); | ||
| shouldHaveSameHeight(); | ||
| shouldHaveSamePixels(); | ||
| outputFileShouldExistAndNotBeEmpty(); | ||
| } | ||
| } |
65 changes: 65 additions & 0 deletions
65
lib/src/test/java/de/edux/augmentation/effects/ResizeAugmentationTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| package de.edux.augmentation.effects; | ||
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| import org.junit.jupiter.api.AfterEach; | ||
| import org.junit.jupiter.api.Test; | ||
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| import static de.edux.augmentation.AugmentationTestUtils.openImageInPreview; | ||
| import static org.junit.jupiter.api.Assertions.*; | ||
| import java.io.File; | ||
| import java.io.IOException; | ||
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| import static de.edux.augmentation.AugmentationTestUtils.loadTestImage; | ||
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| public class ResizeAugmentationTest extends AbstractAugmentationTest { | ||
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| private double originalAspectRatio; | ||
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| @Override | ||
| @AfterEach | ||
| public void checkConformity() throws IOException { | ||
| shouldNotBeNull(); | ||
| shouldHaveSamePixels(); | ||
| outputFileShouldExistAndNotBeEmpty(); | ||
| } | ||
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| @AfterEach | ||
| public void shouldMaintainAspectRatio() { | ||
| double newAspectRatio = (double) augmentedImage.getWidth() / augmentedImage.getHeight(); | ||
| assertEquals( | ||
| originalAspectRatio, | ||
| newAspectRatio, | ||
| "Augmented image should have the same aspect ratio as the original image"); | ||
| } | ||
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| @AfterEach | ||
| public void openImagesInPreview() throws InterruptedException { | ||
| openImageInPreview(originalImage); | ||
| openImageInPreview(augmentedImage); | ||
| } | ||
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| @Test | ||
| public void shouldIncreaseImageSize() throws IOException { | ||
| originalImage = loadTestImage("augmentation" + File.separator + "cyborg-cyberpunk.png"); | ||
| originalAspectRatio = (double) originalImage.getWidth() / originalImage.getHeight(); | ||
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| double testScaleFactor = 2; | ||
| ResizeAugmentation ResizeAugmentation = new ResizeAugmentation(testScaleFactor); | ||
| augmentedImage = ResizeAugmentation.apply(originalImage); | ||
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| assertEquals(augmentedImage.getHeight(), originalImage.getHeight() * testScaleFactor); | ||
| assertEquals(augmentedImage.getWidth(), originalImage.getWidth() * testScaleFactor); | ||
| } | ||
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| @Test | ||
| public void shouldDecreaseImageSize() throws IOException { | ||
| originalImage = loadTestImage("augmentation" + File.separator + "neo-tokyo.png"); | ||
| originalAspectRatio = (double) originalImage.getWidth() / originalImage.getHeight(); | ||
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| double testScaleFactor = 0.5; | ||
| ResizeAugmentation ResizeAugmentation = new ResizeAugmentation(testScaleFactor); | ||
| augmentedImage = ResizeAugmentation.apply(originalImage); | ||
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| assertEquals(augmentedImage.getHeight(), originalImage.getHeight() * testScaleFactor); | ||
| assertEquals(augmentedImage.getWidth(), originalImage.getWidth() * testScaleFactor); | ||
| } | ||
| } |