Add oving0

src/test/java/oving0/EnvironmentTest.java

@@ -0,0 +1,35 @@
+package oving0;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import org.junit.jupiter.api.Test;
+
+/**
+ * This test checks if you have the correct version of Java installed.
+ */
+public class EnvironmentTest {
+
+    private static final int RECOMMENDED_JAVA_VERSION = 25;
+
+    @Test
+    public void testJavaVersion() {
+        int javaVersionNumber = this.getVersion();
+        assertEquals(RECOMMENDED_JAVA_VERSION, javaVersionNumber,
+                "Wrong Java version! We recommend that you use " + RECOMMENDED_JAVA_VERSION);
+    }
+
+    private int getVersion() {
+        String version = System.getProperty("java.version");
+
+        if (version.startsWith("1.")) {
+            version = version.substring(2, 3);
+        } else {
+            int dot = version.indexOf(".");
+
+            if (dot != -1) {
+                version = version.substring(0, dot);
+            }
+        }
+
+        return Integer.parseInt(version);
+    }
+}

src/test/java/oving0/HelloWorldTest.java

@@ -0,0 +1,25 @@
+package oving0;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+public class HelloWorldTest {
+
+    private HelloWorld helloWorld;
+
+    @BeforeEach
+    public void setUp() {
+        helloWorld = new HelloWorld();
+    }
+
+    @Test
+    public void testHelloWorld() {
+        assertEquals("Hello World!", helloWorld.getHelloWorld());
+    }
+
+    @Test
+    public void testHelloWorldLength() {
+        assertEquals(12, helloWorld.getHelloWorldLength());
+    }
+}