Tom Hombergs
GitHub
commit
a8f3ef312b
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/bin/
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package findItems;
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import static org.junit.Assert.assertEquals;
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import java.text.ParseException;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import java.util.stream.Collectors;
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import org.junit.Test;
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public class FindItemsBasedOnValues {
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List<Employee> EmplList = new ArrayList<Employee>();
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List<Department> deptList = new ArrayList<Department>();
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public static void main(String[] args) throws ParseException {
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FindItemsBasedOnValues findItems = new FindItemsBasedOnValues();
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findItems.givenDepartmentList_thenEmployeeListIsFilteredCorrectly();
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}
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@Test
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public void givenDepartmentList_thenEmployeeListIsFilteredCorrectly() {
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Integer expectedId = 1002;
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populate(EmplList, deptList);
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List<Employee> filteredList = EmplList.stream()
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.filter(empl -> deptList.stream()
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.anyMatch(dept -> dept.getDepartment()
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.equals("sales") && empl.getEmployeeId()
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.equals(dept.getEmployeeId())))
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.collect(Collectors.toList());
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assertEquals(expectedId, filteredList.get(0)
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.getEmployeeId());
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}
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private void populate(List<Employee> EmplList, List<Department> deptList) {
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Employee employee1 = new Employee(1001, "empl1");
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Employee employee2 = new Employee(1002, "empl2");
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Employee employee3 = new Employee(1003, "empl3");
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Collections.addAll(EmplList, employee1, employee2, employee3);
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Department department1 = new Department(1002, "sales");
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Department department2 = new Department(1003, "marketing");
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Department department3 = new Department(1004, "sales");
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Collections.addAll(deptList, department1, department2, department3);
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}
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}
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class Employee {
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Integer employeeId;
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String employeeName;
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public Employee(Integer employeeId, String employeeName) {
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super();
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this.employeeId = employeeId;
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this.employeeName = employeeName;
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}
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public Integer getEmployeeId() {
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return employeeId;
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}
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public String getEmployeeName() {
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return employeeName;
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}
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}
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class Department {
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Integer employeeId;
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String department;
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public Department(Integer employeeId, String department) {
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super();
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this.employeeId = employeeId;
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this.department = department;
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}
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public Integer getEmployeeId() {
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return employeeId;
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}
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public String getDepartment() {
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return department;
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}
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package com.baeldung.findItems;
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import static org.junit.Assert.assertEquals;
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import java.text.ParseException;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import java.util.stream.Collectors;
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import org.junit.Test;
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public class FindItemsBasedOnOtherStreamUnitTest {
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private List<Employee> employeeList = new ArrayList<Employee>();
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private List<Department> departmentList = new ArrayList<Department>();
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@Test
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public void givenDepartmentList_thenEmployeeListIsFilteredCorrectly() {
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Integer expectedId = 1002;
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populate(employeeList, departmentList);
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List<Employee> filteredList = employeeList.stream()
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.filter(empl -> departmentList.stream()
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.anyMatch(dept -> dept.getDepartment()
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.equals("sales") && empl.getEmployeeId()
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.equals(dept.getEmployeeId())))
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.collect(Collectors.toList());
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assertEquals(expectedId, filteredList.get(0)
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.getEmployeeId());
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}
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private void populate(List<Employee> EmplList, List<Department> deptList) {
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Employee employee1 = new Employee(1001, "empl1");
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Employee employee2 = new Employee(1002, "empl2");
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Employee employee3 = new Employee(1003, "empl3");
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Collections.addAll(EmplList, employee1, employee2, employee3);
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Department department1 = new Department(1002, "sales");
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Department department2 = new Department(1003, "marketing");
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Department department3 = new Department(1004, "sales");
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Collections.addAll(deptList, department1, department2, department3);
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}
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}
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class Employee {
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private Integer employeeId;
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private String employeeName;
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Employee(Integer employeeId, String employeeName) {
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super();
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this.employeeId = employeeId;
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this.employeeName = employeeName;
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}
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Integer getEmployeeId() {
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return employeeId;
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}
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public String getEmployeeName() {
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return employeeName;
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}
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}
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class Department {
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private Integer employeeId;
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private String department;
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Department(Integer employeeId, String department) {
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super();
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this.employeeId = employeeId;
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this.department = department;
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}
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Integer getEmployeeId() {
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return employeeId;
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}
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String getDepartment() {
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return department;
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}
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}
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@ -0,0 +1,54 @@
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package com.baeldung.modulo;
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import org.junit.Test;
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import static org.assertj.core.api.Java6Assertions.*;
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public class ModuloUnitTest {
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@Test
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public void whenIntegerDivision_thenLosesRemainder(){
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assertThat(11 / 4).isEqualTo(2);
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}
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@Test
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public void whenDoubleDivision_thenKeepsRemainder(){
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assertThat(11 / 4.0).isEqualTo(2.75);
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}
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@Test
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public void whenModulo_thenReturnsRemainder(){
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assertThat(11 % 4).isEqualTo(3);
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}
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@Test(expected = ArithmeticException.class)
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public void whenDivisionByZero_thenArithmeticException(){
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double result = 1 / 0;
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}
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@Test(expected = ArithmeticException.class)
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public void whenModuloByZero_thenArithmeticException(){
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double result = 1 % 0;
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}
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@Test
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public void whenDivisorIsOddAndModulusIs2_thenResultIs1(){
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assertThat(3 % 2).isEqualTo(1);
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}
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@Test
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public void whenDivisorIsEvenAndModulusIs2_thenResultIs0(){
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assertThat(4 % 2).isEqualTo(0);
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}
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@Test
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public void whenItemsIsAddedToCircularQueue_thenNoArrayIndexOutOfBounds(){
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int QUEUE_CAPACITY= 10;
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int[] circularQueue = new int[QUEUE_CAPACITY];
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int itemsInserted = 0;
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for (int value = 0; value < 1000; value++) {
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int writeIndex = ++itemsInserted % QUEUE_CAPACITY;
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circularQueue[writeIndex] = value;
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}
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}
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}
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