add et substract with their tests

Author: mdoumaci

.gitignore

@@ -1,23 +1,74 @@
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main/ma/ac/insea/calculator/implementations/CalculatorImpl.java

@@ -0,0 +1,50 @@
+package ma.ac.insea.calculator.implementations;
+
+import ma.ac.insea.calculator.interfaces.ICalculator;
+
+public class CalculatorImpl implements ICalculator {
+
+	@Override
+	public int add(int a, int b) {
+		// TODO Auto-generated method stub
+		if(b>0){
+			while(b-- >0){
+				a++;
+				
+			}
+			return a;
+		}
+		else
+			if(a > 0){
+				while(a-- > 0){
+					b++;
+					
+				}
+				return b;
+			}
+			else
+				while(b++ < 0){
+						a--;
+					}
+		return a;
+	}
+
+	@Override
+	public int substact(int a, int b) {
+		// TODO Auto-generated method stub
+		return  add(a,b);
+	}
+
+	@Override
+	public float divide(int a, int b) {
+		// TODO Auto-generated method stub
+		return 0;
+	}
+
+	@Override
+	public int multiply(int a, int b) {
+		// TODO Auto-generated method stub
+		return 0;
+	}
+
+}

main/ma/ac/insea/calculator/interfaces/ICalculator.java

@@ -0,0 +1,8 @@
+package ma.ac.insea.calculator.interfaces;
+
+public interface ICalculator {
+	public int add(int a, int b);
+	public int substact(int a, int b);
+	public float divide(int a, int b);
+	public int multiply(int a, int b);
+}

test/CalculatorImpl/CalculatorTest.java

@@ -0,0 +1,59 @@
+package CalculatorImpl;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+import ma.ac.insea.calculator.implementations.CalculatorImpl;
+
+public class CalculatorTest {
+
+	@Test
+	public void testAdd() {
+		CalculatorImpl cal = new CalculatorImpl();
+		int a = 5, b=7;
+		if(cal.add(a, b) != 12)
+			fail("tous positif");
+		
+		a = -5; b=7;
+		if(cal.add(a, b) != 2)
+			fail("a est negatif");
+		
+		a = 5; b=-7;
+		if(cal.add(a, b) != -2)
+			fail("b est negatif");
+		
+		a = 0; b=7;
+		if(cal.add(a, b) != 7)
+			fail("a est nul et b positif");
+		
+		a = 0; b=-7;
+		if(cal.add(a, b) != -7)
+			fail("a est nul et b negatif");
+		
+		a = 5; b=0;
+		if(cal.add(a, b) != 5)
+			fail("a est positif et b nul");
+		
+		a = -5; b=0;
+		if(cal.add(a, b) != -5)
+			fail("a est negatif et b nul");
+		
+	}
+
+	@Test
+	public void testSubstact() {
+		testAdd();
+	}
+
+	@Test
+	public void testDivide() {
+		fail("Not yet implemented");
+	}
+
+	@Test
+	public void testMultiply() {
+		fail("Not yet implemented");
+	}
+
+}