From 4f3f9399a8b321643b876f54e17ffb0f27a0655b Mon Sep 17 00:00:00 2001
From: Lukas Reichwein <lukas.reichwein@informatik.hs-fulda.de>
Date: Tue, 16 Jul 2019 18:09:06 +0200
Subject: [PATCH] Added the functionality to calculate the absolute value of an
 complex number

---
 .../ugsbo/complexnumcalc/ComplexNumber.java   |  2 +-
 .../AbsoluteValueOfComplexNumbersTest.java    | 46 ++++++++++++++++++-
 2 files changed, 45 insertions(+), 3 deletions(-)

diff --git a/src/main/java/com/ugsbo/complexnumcalc/ComplexNumber.java b/src/main/java/com/ugsbo/complexnumcalc/ComplexNumber.java
index 90769e5..b55cc87 100644
--- a/src/main/java/com/ugsbo/complexnumcalc/ComplexNumber.java
+++ b/src/main/java/com/ugsbo/complexnumcalc/ComplexNumber.java
@@ -129,7 +129,7 @@ public class ComplexNumber {
     }
 
     public Double absolutValueOf(){
-        Double absoluteValue = Math.sqrt(Math.pow(this.realPart, 2)) ;
+        Double absoluteValue = Math.sqrt(Math.pow(this.realPart, 2) + Math.pow(this.imaginaryPart, 2)) ;
         return absoluteValue;
     }
 
diff --git a/src/test/java/com/ugsbo/complexnumcalc/AbsoluteValueOfComplexNumbersTest.java b/src/test/java/com/ugsbo/complexnumcalc/AbsoluteValueOfComplexNumbersTest.java
index be70ff6..48a3d70 100644
--- a/src/test/java/com/ugsbo/complexnumcalc/AbsoluteValueOfComplexNumbersTest.java
+++ b/src/test/java/com/ugsbo/complexnumcalc/AbsoluteValueOfComplexNumbersTest.java
@@ -8,7 +8,6 @@ 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();
@@ -19,11 +18,54 @@ public class AbsoluteValueOfComplexNumbersTest {
     @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);
     }
+
+    @Test
+    public void TheAbsoluteValueOfAComplexNumber_IsNotTheAbsoluteValueOfIt() {
+        ComplexNumber complexNumber = new ComplexNumber(Double.valueOf(4), Double.valueOf(3));
+        Double expected = Double.valueOf(5);
+
+        Double actual = complexNumber.absolutValueOf();
+
+        assertEquals("The absolute value of an complex number should be the square root of the sum of real " +
+        "part times real part and imaginary part times imaginary part ", expected, actual);
+    }
+
+    @Test
+    public void TheAbsoluteValueOfAComplexNumberWithNegativRealPart_IsNotTheAbsoluteValueOfIt() {
+        ComplexNumber complexNumber = new ComplexNumber(Double.valueOf(-4), Double.valueOf(3));
+        Double expected = Double.valueOf(5);
+
+        Double actual = complexNumber.absolutValueOf();
+
+        assertEquals("The absolute value of an complex number with negative real part should be the square root of the sum of real " +
+        "part times real part and imaginary part times imaginary part ", expected, actual);
+    }
+
+    @Test
+    public void TheAbsoluteValueOfAComplexNumberWithNegativImaginaryPart_IsNotTheAbsoluteValueOfIt() {
+        ComplexNumber complexNumber = new ComplexNumber(Double.valueOf(4), Double.valueOf(-3));
+        Double expected = Double.valueOf(5);
+
+        Double actual = complexNumber.absolutValueOf();
+
+        assertEquals("The absolute value of an complex number with negative imaginary part should be the square root of the sum of real " +
+        "part times real part and imaginary part times imaginary part ", expected, actual);
+    }
+
+    @Test
+    public void TheAbsoluteValueOfAComplexNumberWithNegativParts_IsNotTheAbsoluteValueOfIt() {
+        ComplexNumber complexNumber = new ComplexNumber(Double.valueOf(-4), Double.valueOf(-3));
+        Double expected = Double.valueOf(5);
+
+        Double actual = complexNumber.absolutValueOf();
+
+        assertEquals("The absolute value of an complex number with negative parts should be the square root of the sum of real " +
+        "part times real part and imaginary part times imaginary part ", expected, actual);
+    }
 }
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