Improve ejer7

Author: micaelgallego

tema1_2_ejer7/src/test/java/es/codeurjc/test/complex/ComplexAbsTest.java

@@ -1,6 +1,7 @@
 package es.codeurjc.test.complex;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.offset;
 
 import java.util.Arrays;
 import java.util.Collection;
@@ -13,7 +14,7 @@ public class ComplexAbsTest {
 	@ParameterizedTest(name = "{index}: ({0}).abs() == {1}")
 	@MethodSource("values")
 	public void absoluteTest(Complex complex, double result) {
-		assertEquals(complex.abs(), result, 0.001);
+		assertThat(complex.abs()).isCloseTo(result, offset(0.001));
 	}
 
 	public static Collection<Object[]> values() {

tema1_2_ejer7/src/test/java/es/codeurjc/test/complex/ComplexTest.java

@@ -1,6 +1,7 @@
 package es.codeurjc.test.complex;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -31,4 +32,14 @@ public void GivenComplex1_1_whenAddToZero_thenComplex1_1IsObtained() {
 
 		assertThat((new Complex(1, 1)).add(zero)).isEqualTo(new Complex(1, 1));
 	}
+	
+	@Test
+	public void GivenComplex0_0_whenReciprocal_thenExceptionIsThrown() {
+		
+		Complex zero = new Complex(0,0);
+		
+		assertThatThrownBy(() -> zero.reciprocal())
+			.isInstanceOf(ArithmeticException.class)
+			.hasMessage("division by zero");		
+	}
 }