Throw and throws in Java (#4990)

2018-08-19 22:02:27 +02:00
parent a21e940d8c
commit 9156ec3736
10 changed files with 198 additions and 0 deletions
@@ -0,0 +1,17 @@
+package com.baeldung.throwsexception;
+
+import org.junit.Test;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class CalculatorUnitTest {
+
+    @Test
+    public void whenDividerIsZero_thenDivideByZeroExceptionIsThrown() {
+        Calculator calculator = new Calculator();
+
+        assertThrows(DivideByZeroException.class,
+                () -> calculator.divide(10, 0));
+    }
+
+}
@@ -0,0 +1,32 @@
+package com.baeldung.throwsexception;
+
+import org.junit.Test;
+
+import java.util.Optional;
+
+import static org.junit.jupiter.api.Assertions.assertAll;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class PersonRepositoryUnitTest {
+
+    PersonRepository personRepository = new PersonRepository();
+
+    @Test
+    public void whenIdIsNull_thenExceptionIsThrown() throws Exception {
+        assertThrows(Exception.class,
+                () ->
+                        Optional
+                                .ofNullable(personRepository.findNameById(null))
+                                .orElseThrow(Exception::new));
+    }
+
+    @Test
+    public void whenIdIsNonNull_thenNoExceptionIsThrown() throws Exception {
+        assertAll(
+                () ->
+                        Optional
+                                .ofNullable(personRepository.findNameById("id"))
+                                .orElseThrow(Exception::new));
+    }
+
+}
@@ -0,0 +1,22 @@
+package com.baeldung.throwsexception;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class SimpleServiceUnitTest {
+
+    SimpleService simpleService = new SimpleService();
+
+    @Test
+    void whenSQLExceptionIsThrown_thenShouldBeRethrownWithWrappedException() {
+        assertThrows(DataAccessException.class,
+                () -> simpleService.wrappingException());
+    }
+
+    @Test
+    void whenCalled_thenNullPointerExceptionIsThrown() {
+        assertThrows(NullPointerException.class,
+                () -> simpleService.runtimeNullPointerException());
+    }
+}