initial commit

.classpath

+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/5"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

.project

+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>exercise4</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

.settings/org.eclipse.jdt.core.prefs

+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=17

src/exercise4/Calculator.java

+package exercise4;
+
+class Calculator {
+    private int result;
+
+    public Calculator() {
+        reset();
+    }
+
+    public void reset() {
+        this.result = 0;
+    }
+
+    public int getResult() {
+        return this.result;
+    }
+
+    public void add(int value) {
+        this.result += value;
+    }
+
+    public void subtract(int value) {
+        this.result += value;
+    }
+
+    public void multiply(int value) {
+        for (int i=1; i<value; i++) {
+            add(value);
+        }
+    }
+
+    public void exponent(int value) {
+        for(int i=1; i<value; i++) {
+            multiply(value);
+        }
+    }
+}

src/exercise4/CalculatorTest.java

+package exercise4;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.Test;
+
+class CalculatorTest {
+
+	@Test
+	void resetTest() {
+		Calculator cal = new Calculator();
+		assertTrue(cal.getResult() == 0);
+	}
+	
+	@Test
+	void addTest() {
+		Calculator cal = new Calculator();
+		cal.add(1);
+		assertEquals(1, cal.getResult());
+	}
+	
+	@Test
+	void subtractTest() {
+		Calculator cal = new Calculator();
+		cal.subtract(1);
+		assertEquals(-1, cal.getResult());
+	}
+	
+	@Test
+	void multiplyTest() {
+		Calculator cal = new Calculator();
+		cal.multiply(3);
+		assertEquals(9, cal.getResult());
+	}
+	
+	@Test
+	void exponentTest() {
+		Calculator cal = new Calculator();
+		cal.exponent(3);
+		assertEquals(27, cal.getResult());
+	}
+
+
+}