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add constructor chaining example (#7125)

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This commit is contained in:
Carlos Cano
2019-07-21 05:20:19 +02:00
committed by Josh Cummings
parent 8e6a12f1a2
commit 7eaa85d524
2 changed files with 36 additions and 14 deletions
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38
core-java-modules/core-java-lang-oop/src/test/java/com/baeldung/constructors/ConstructorUnitTest.java
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@@ -1,15 +1,14 @@
package com.baeldung.constructors;
import com.baeldung.constructors.*;
import com.google.common.collect.Comparators;
import org.junit.Test;
import java.util.logging.Logger;
import java.time.LocalDateTime;
import java.time.Month;
import java.util.ArrayList;
import java.util.logging.Logger;
import org.junit.Test;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatCode;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.assertj.core.api.Assertions.*;
public class ConstructorUnitTest {
final static Logger LOGGER = Logger.getLogger(ConstructorUnitTest.class.getName());
@@ -17,26 +16,28 @@ public class ConstructorUnitTest {
@Test
public void givenNoExplicitContructor_whenUsed_thenFails() {
BankAccount account = new BankAccount();
assertThatThrownBy(() -> { account.toString(); }).isInstanceOf(Exception.class);
assertThatThrownBy(() -> {
account.toString();
}).isInstanceOf(Exception.class);
}
@Test
public void givenNoArgumentConstructor_whenUsed_thenSucceeds() {
BankAccountEmptyConstructor account = new BankAccountEmptyConstructor();
assertThatCode(() -> {
account.toString();
}).doesNotThrowAnyException();
account.toString();
}).doesNotThrowAnyException();
}
@Test
public void givenParameterisedConstructor_whenUsed_thenSucceeds() {
LocalDateTime opened = LocalDateTime.of(2018, Month.JUNE, 29, 06, 30, 00);
BankAccountParameterizedConstructor account =
new BankAccountParameterizedConstructor("Tom", opened, 1000.0f);
new BankAccountParameterizedConstructor("Tom", opened, 1000.0f);
assertThatCode(() -> {
account.toString();
}).doesNotThrowAnyException();
account.toString();
}).doesNotThrowAnyException();
}
@Test
@@ -47,7 +48,16 @@ public class ConstructorUnitTest {
assertThat(account.getName()).isEqualTo(newAccount.getName());
assertThat(account.getOpened()).isNotEqualTo(newAccount.getOpened());
assertThat(newAccount.getBalance()).isEqualTo(0.0f);
}
@Test
public void givenChainedConstructor_whenUsed_thenMaintainsLogic() {
BankAccountChainedConstructors account = new BankAccountChainedConstructors("Tim");
BankAccountChainedConstructors newAccount = new BankAccountChainedConstructors("Tim", LocalDateTime.now(), 0.0f);
assertThat(account.getName()).isEqualTo(newAccount.getName());
assertThat(account.getBalance()).isEqualTo(newAccount.getBalance());
}
}