Add unit test for JHBlurFilter

webcam-capture/src/test/java/com/github/sarxos/webcam/util/jh/JHBlurFilterTest.java

@@ -0,0 +1,66 @@
+package com.github.sarxos.webcam.util.jh;
+
+import java.awt.image.BufferedImage;
+
+import org.assertj.core.api.Assertions;
+import org.junit.Test;
+
+
+public class JHBlurFilterTest {
+
+	@Test
+	public void test_filterNonPremultiplied() {
+
+		final JHBlurFilter filter = new JHBlurFilter();
+		filter.setPremultiplyAlpha(false);
+
+		final BufferedImage bi1 = new BufferedImage(10, 10, BufferedImage.TYPE_INT_ARGB);
+		final BufferedImage bi2 = filter.filter(bi1, null);
+
+		Assertions
+			.assertThat(bi1.getWidth())
+			.isEqualTo(bi2.getWidth());
+		Assertions
+			.assertThat(bi1.getHeight())
+			.isEqualTo(bi2.getHeight());
+		Assertions
+			.assertThat(bi1.getType())
+			.isEqualTo(bi2.getType());
+	}
+
+	@Test
+	public void test_filterPremultiplied() {
+
+		final JHBlurFilter filter = new JHBlurFilter();
+		filter.setPremultiplyAlpha(true);
+
+		final BufferedImage bi1 = new BufferedImage(10, 10, BufferedImage.TYPE_INT_ARGB);
+		final BufferedImage bi2 = filter.filter(bi1, null);
+
+		Assertions
+			.assertThat(bi1.getWidth())
+			.isEqualTo(bi2.getWidth());
+		Assertions
+			.assertThat(bi1.getHeight())
+			.isEqualTo(bi2.getHeight());
+		Assertions
+			.assertThat(bi1.getType())
+			.isEqualTo(bi2.getType());
+	}
+
+	@Test
+	public void test_setGetPremultiplyAlpha() {
+
+		final JHBlurFilter filter = new JHBlurFilter();
+
+		filter.setPremultiplyAlpha(true);
+		Assertions
+			.assertThat(filter.getPremultiplyAlpha())
+			.isTrue();
+
+		filter.setPremultiplyAlpha(false);
+		Assertions
+			.assertThat(filter.getPremultiplyAlpha())
+			.isFalse();
+	}
+}