The absolute value of an complex Number with only a real part can is now implemented in the absolutValueOf function

src/main/java/com/ugsbo/complexnumcalc/ComplexNumber.java

@@ -128,4 +128,9 @@ public class ComplexNumber {
         return qoutient;
     }
 
+    public Double absolutValueOf(){
+        Double absoluteValue = Math.sqrt(Math.pow(this.realPart, 2)) ;
+        return absoluteValue;
+    }
+
 }

src/test/java/com/ugsbo/complexnumcalc/AbsoluteValueOfComplexNumbersTest.java

@@ -0,0 +1,29 @@
+package com.ugsbo.complexnumcalc;
+
+import static org.junit.Assert.assertEquals;
+import org.junit.Test;
+
+public class AbsoluteValueOfComplexNumbersTest {
+
+    @Test
+    public void TheAbsoluteValueOfAComplexNumberWithOnlyARealPart_IsNotTHeAbsoluteValueOfTheRealPart() {
+        ComplexNumber complexNumber = new ComplexNumber(Double.valueOf(4), Double.valueOf(0));
+
+        Double expected = Double.valueOf(4);
+
+        Double actual = complexNumber.absolutValueOf();
+
+        assertEquals("The absolute value of an complex number with only an real part should be the absolute value of that real part", expected, actual);
+    }
+
+    @Test
+    public void TheAbsoluteValueOfAComplexNumberWithOnlyANegativeRealPart_IsNotTheAbsoluteValueOfTheRealPart() {
+        ComplexNumber complexNumber = new ComplexNumber(Double.valueOf(-4), Double.valueOf(0));
+
+        Double expected = Double.valueOf(4);
+
+        Double actual = complexNumber.absolutValueOf();
+
+        assertEquals("The absolute value of an complex number with only an negative real part should be the absolute value of that real part", expected, actual);
+    }
+}