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BAEL-6458: Guide to the yield Keyword in Java (#14440) 

* BAEL-6229: committing new example for loading multiple yaml configuration files

* BAEL-6229: updating README.md

* BAEL-6229: adding example one code, commented out

* Revert "BAEL-6229: updating README.md"

This reverts commit 51cd2dcf97f797aa6a723888fd246ef0142242a3.

* BAEL-6229: adding comments around commented out code for first example.

* BAEL-6458: creating new module for conditionals and adding examples for yield

* BAEL-6458: creating new module for conditionals and adding examples for yield

* BAEL-6458: rename methods

* BAEL-6458: clean up pom

* BAEL-6458: convert checks to tests

* BAEL-6458: convert checks to tests

* BAEL-6458: convert checks to tests

* BAEL-6458: move examples to just YieldTest and removed YieldExamples class. Also added assigning the value of the switch expression to a variable instead of returning from method. Also added a non-default exhaustive test.

* BAEL-6458: Test clean up based on initial PR feedback.
This commit is contained in:
Alex Tighe 2023-08-07 13:38:05 -04:00 committed by GitHub
parent 966d488013
commit 6a6ac00db2
3 changed files with 146 additions and 0 deletions
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5
core-java-modules/core-java-conditionals/README.md Normal file
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## Core Java Conditionals
This module contains articles about Java Conditionals.
### Relevant articles:

58
core-java-modules/core-java-conditionals/pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>core-java-conditionals</artifactId>
<version>0.1.0-SNAPSHOT</version>
<name>core-java-compiler</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.24</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<compilerArgs>--enable-preview</compilerArgs>
<source>${maven.compiler.source.version}</source>
<target>${maven.compiler.target.version}</target>
<release>14</release>
<compilerArgs>--enable-preview</compilerArgs>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${surefire.plugin.version}</version>
<configuration>
<argLine>--enable-preview</argLine>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<maven.compiler.source.version>14</maven.compiler.source.version>
<maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
<maven.compiler.target.version>14</maven.compiler.target.version>
<surefire.plugin.version>3.0.0-M3</surefire.plugin.version>
</properties>
</project>

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core-java-modules/core-java-conditionals/src/test/java/com/baeldung/conditionals/YieldTest.java Normal file
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package com.baeldung.conditionals;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
class YieldTest {
enum Number {
ONE, TWO, THREE, FOUR
}
@Test
void whenSwitchingOnNumberOne_thenWillReturnString() {
Number number = Number.ONE;
String message;
switch (number) {
case ONE:
message = "Got a 1";
break;
case TWO:
message = "Got a 2";
break;
default:
message = "More than 2";
}
assertEquals("Got a 1", message);
}
@Test
void whenSwitchingWithArrowOnNumberTwo_thenWillReturnString() {
Number number = Number.TWO;
String message = switch (number) {
case ONE -> {
yield "Got a 1";
}
case TWO -> {
yield "Got a 2";
}
default -> {
yield "More than 2";
}
};
assertEquals("Got a 2", message);
}
@Test
void whenSwitchingWithArrowNoDefaultOnNumberTwo_thenWillReturnString() {
Number number = Number.TWO;
String message = switch (number) {
case ONE -> {
yield "Got a 1";
}
case TWO -> {
yield "Got a 2";
}
case THREE, FOUR -> {
yield "More than 2";
}
};
assertEquals("Got a 2", message);
}
@Test
void whenSwitchingWithColonOnNumberTwo_thenWillReturnString() {
Number number = Number.TWO;
String message = switch (number) {
case ONE:
yield "Got a 1";
case TWO:
yield "Got a 2";
default:
yield "More than 2";
};
assertEquals("Got a 2", message);
}
}