First tiny test

pom.xml

@@ -57,6 +57,19 @@
         <version>5</version>
     </parent>
 
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.junit</groupId>
+				<artifactId>junit-bom</artifactId>
+				<version>5.7.1</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+	
+	
     <dependencies>
         <dependency>
             <groupId>org.apache.ant</groupId>
@@ -64,6 +77,23 @@
             <version>1.10.9</version>
             <scope>provided</scope>
         </dependency>
+		<dependency>
+			<groupId>org.assertj</groupId>
+			<artifactId>assertj-core</artifactId>
+			<version>3.19.0</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.scilab.forge</groupId>
+			<artifactId>jlatexmath</artifactId>
+			<version>1.0.7</version>
+			<scope>test</scope>
+		</dependency>
     </dependencies>
 
     <licenses>
@@ -95,6 +125,7 @@
 
     <build>
         <sourceDirectory>${project.basedir}/src</sourceDirectory>
+        <testSourceDirectory>${project.basedir}/test</testSourceDirectory>
         <resources>
             <resource>
                 <directory>${project.basedir}/src</directory>
@@ -176,6 +207,18 @@
                     </archive>
                 </configuration>
             </plugin>
+			<plugin>
+				<artifactId>maven-surefire-plugin</artifactId>
+				<version>3.0.0-M5</version>
+				<configuration>
+					<environmentVariables>
+						<PLANTUML_SECURITY_PROFILE>UNSECURE</PLANTUML_SECURITY_PROFILE>
+					</environmentVariables>
+					<systemPropertyVariables>
+						<java.awt.headless>true</java.awt.headless>
+					</systemPropertyVariables>
+				</configuration>
+			</plugin>
             <plugin>
                 <artifactId>maven-release-plugin</artifactId>
                 <version>2.1</version>

test/net/sourceforge/plantuml/ScaleHeightTest.java

@@ -0,0 +1,16 @@
+package net.sourceforge.plantuml;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+class ScaleHeightTest {
+
+	@Test
+	void testScale2() {
+		final ScaleHeight cut = new ScaleHeight(100);
+		final double scale = cut.getScale(50, 50);
+		assertEquals(2.0, scale, .001);
+	}
+
+}