Gradle java project - code and test

source code

Hello.java

package examples;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

public class Hello {

    public String hello() throws IOException {

        InputStream in = Thread.currentThread().getContextClassLoader().getResourceAsStream("hello.txt");

        BufferedReader reader = new BufferedReader(new InputStreamReader(in));

        StringBuilder s = new StringBuilder();

        String line;

        while ((line = reader.readLine()) != null) {

            System.out.println(line);

            s.append(line);

        }

        return s.toString();

    }

    

}

prepare build.gradle and apply java plugin

apply plugin: ‘java'

compile java

$ gradle compileJava

BUILD SUCCESSFUL in 620ms

1 actionable task: 1 executed

Clean classes

$ gradle clean

BUILD SUCCESSFUL in 564ms

1 actionable task: 1 executed

Build code and run test

Add junit dependency

apply plugin: 'java'

repositories {

    mavenCentral()

}

dependencies {

    testCompile 'junit:junit:4.12'

}

Add test code

package examples;

import java.io.IOException;

import java.net.URISyntaxException;

import java.nio.file.Files;

import java.nio.file.Paths;

import org.junit.Assert;

import org.junit.Test;

public class HelloTest {

    @Test

    public void hello() throws IOException, URISyntaxException {

        Hello h = new Hello();

        String hello = h.hello();

        String hellotest = new String(Files.readAllBytes(Paths.get(Thread.currentThread().getContextClassLoader().getResource("hellotest.txt").toURI())));

        Assert.assertEquals(hellotest, hello);

    }

   

}

Compile and Test

$ gradle build

Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0.

Use '--warning-mode all' to show the individual deprecation warnings.

See https://docs.gradle.org/6.3/userguide/command_line_interface.html#sec:command_line_warnings

BUILD SUCCESSFUL in 1s

6 actionable tasks: 6 executed

Test Report

Open in browser: build/reports/tests/test/index.html