002 - feat: unit tests

.github/workflows/ci.yml

@@ -0,0 +1,39 @@
+# This workflow will build a Java project with Maven
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
+
+name: 'CI'
+
+# Controls when the action will run.
+on:
+  workflow_call:
+  workflow_dispatch:
+
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  continuous-testing:
+    runs-on: ubuntu-latest
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v4
+      # Runs a single command using the runners shell
+      - name: Set up JDK 1.17
+        uses: actions/setup-java@v4
+        with:
+          distribution: "liberica"
+          java-version: "17"
+          cache: "maven"
+      - name: Compile
+        run: mvn compile
+      - name: Test
+        run: mvn verify
+      - uses: dorny/test-reporter@v1
+        with:
+          name: Test Results
+          path: "target/**/TEST*.xml"
+          reporter: java-junit

.github/workflows/test-report.yml

@@ -0,0 +1,18 @@
+name: 'Test Report'
+on:
+  workflow_call:
+  workflow_dispatch:
+  workflow_run:
+    workflows: ['CI']                     # runs after CI workflow
+    types:
+      - completed
+jobs:
+  report:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dorny/test-reporter@v1
+        with:
+          artifact: test-results            # artifact name
+          name: Test Results                # Name of the check run which will be created
+          path: '*.xml'                     # Path to test results (inside artifact .zip)
+          reporter: java-junit              # Format of test results

.gitpod.Dockerfile

@@ -0,0 +1,7 @@
+FROM gitpod/workspace-full
+
+USER gitpod
+
+RUN bash -c ". /home/gitpod/.sdkman/bin/sdkman-init.sh && \
+    sdk install java 17.0.9-tem && \
+    sdk default java 17.0.9-tem"

.gitpod.yml

@@ -0,0 +1,24 @@
+# This configuration file was automatically generated by Gitpod.
+# Please adjust to your needs (see https://www.gitpod.io/docs/config-gitpod-file)
+# and commit this file to your remote git repository to share the goodness with others.
+
+image:
+    file: .gitpod.Dockerfile
+
+tasks:
+    - init: mvn package -DskipTests=false
+
+vscode:
+  extensions:
+    - redhat.java
+    - vscjava.vscode-java-debug
+    - vscjava.vscode-maven
+
+# Ports to expose on workspace startup
+ports:
+    - port: 8080
+      onOpen: open-preview
+      name: Calculator API
+      description: Calculator API init
+      visibility: private
+      protocol: http

README.md

@@ -8,6 +8,7 @@ Create calculator App
 * Substract: substract two numbers and return result
 * Multiply: multiply two numbers and return result
 * Divide: divide two numbers and return result
+    * divide by zero should return error message
 
 ## System requirements
 
@@ -35,7 +36,23 @@ $ ./mvnw clean test
 
 ## 2. Automatically Build and Test
 
-**TODO**
+[Github action ci](.github/workflows/ci.yml) step definition:
+```yaml
+steps:
+  # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+  - uses: actions/checkout@v2
+  # Runs a single command using the runners shell
+  - name: Set up JDK 1.11
+    uses: actions/[email protected]
+    with:
+      java-version: '11'
+      distribution: 'zulu'
+      cache: 'maven'
+  - name: Compile
+    run: mvn compile
+  - name: Test
+    run: mvn verify
+```
 
 ## 3. Containerize Your Web App
 

pom.xml

@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.geekshubs.javawebapp</groupId>
     <artifactId>java-maven-calculator-web-app</artifactId>
-    <packaging>war</packaging>
+    <packaging>jar</packaging>
     <version>1.1-SNAPSHOT</version>
     <name>Calculator Web</name>
     <description>A Java Maven Calculator Web Application</description>
@@ -17,7 +17,6 @@
         <maven-compiler-plugin.version>3.9.0</maven-compiler-plugin.version>
         <maven.resources.plugin.version>3.2.0</maven.resources.plugin.version>
         <maven.surefire.plugin.version>2.22.2</maven.surefire.plugin.version>
-        <jacoco.maven.plugin.version>0.8.7</jacoco.maven.plugin.version>
     </properties>
 
     <dependencies>
@@ -71,25 +70,6 @@
                     </execution>
                 </executions>
             </plugin>
-            <plugin>
-                <groupId>org.jacoco</groupId>
-                <artifactId>jacoco-maven-plugin</artifactId>
-                <version>${jacoco.maven.plugin.version}</version>
-                <executions>
-                    <execution>
-                        <goals>
-                            <goal>prepare-agent</goal>
-                        </goals>
-                    </execution>
-                    <execution>
-                        <id>report</id>
-                        <phase>test</phase>
-                        <goals>
-                            <goal>report</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
         </plugins>
     </build>
 </project>

src/main/java/com/geekshubs/calculator/Calculator.java

@@ -2,4 +2,25 @@
 
 public class Calculator {
 
+    int _x;
+    int _y;
+    int _result;
+
+    public Calculator(int x, int y, int result) {
+        _x = x;
+        _y = y;
+        _result = result;
+    }
+
+    public int getX() {
+        return _x;
+    }
+
+    public int getY() {
+        return _y;
+    }
+
+    public int getResult() {
+        return _result;
+    }
 }

src/test/java/com/geekshubs/calculator/CalculatorTest.java

@@ -1,5 +1,34 @@
 package com.geekshubs.calculator;
 
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
 public class CalculatorTest {
 
+    @Test
+    public void testSum() {
+        assertEquals(34, new Calculator(8, 26, 8 + 26).getResult());
+    }
+
+    @Test
+    public void testSub() {
+        assertEquals(4, new Calculator(12, 8, 12 - 8).getResult());
+    }
+
+    @Test
+    public void testMul() {
+        assertEquals(88, new Calculator(11, 8, 11 * 8).getResult());
+    }
+
+    @Test
+    public void testDiv() {
+        assertEquals(1, new Calculator(12, 12, 12 / 12).getResult());
+    }
+
+    @Test
+    public void testDivByZero() {
+        assertThrows(ArithmeticException.class, () -> new Calculator(12, 0, 12 / 0).getResult());
+    }
 }