First tests

.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" output="target/classes" path="src/main/java">
+		<attributes>
+			<attribute name="optional" value="true"/>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" output="target/test-classes" path="src/test/java">
+		<attributes>
+			<attribute name="test" value="true"/>
+			<attribute name="optional" value="true"/>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11">
+		<attributes>
+			<attribute name="module" value="true"/>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/5"/>
+	<classpathentry kind="output" path="target/classes"/>
+</classpath>

.gitignore

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+/target/

.project

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>tdd</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.eclipse.m2e.core.maven2Nature</nature>
+	</natures>
+</projectDescription>

.settings/org.eclipse.core.resources.prefs

@@ -0,0 +1,4 @@
+eclipse.preferences.version=1
+encoding//src/main/java=UTF-8
+encoding//src/test/java=UTF-8
+encoding/<project>=UTF-8

.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,11 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
+org.eclipse.jdt.core.compiler.compliance=11
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=disabled
+org.eclipse.jdt.core.compiler.source=11

.settings/org.eclipse.m2e.core.prefs

@@ -0,0 +1,4 @@
+activeProfiles=
+eclipse.preferences.version=1
+resolveWorkspaceProjects=true
+version=1

README.md

@@ -1 +1,11 @@
-# tdd
+# TDD - Test Driven Development
+
+Nowadays everyone knows that TDD asks us to create unit tests first before the production code. But this rule is only the beginning.
+
+### The three laws of TDD
+
+**First Law:** You should not write the production code until you have created a failure unit test.
+
+**Second Law:** You should not write more than one unit test than is necessary to fail, and not to complicate is a failure.
+
+**Third law:** you must not write any other production code needed to apply the current failure test.

pom.xml

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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>
+
+	<groupId>com.maa.app</groupId>
+	<artifactId>tdd</artifactId>
+	<version>1.0-SNAPSHOT</version>
+
+	<name>tdd</name>
+	<!-- FIXME change it to the project's website -->
+	<url>https://github.com/marceloamadeu/tdd</url>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<maven.compiler.source>11</maven.compiler.source>
+		<maven.compiler.target>11</maven.compiler.target>
+	</properties>
+
+	<dependency>
+		<groupId>org.junit.jupiter</groupId>
+		<artifactId>junit-jupiter-api</artifactId>
+		<version>5.0.3</version>
+		<scope>test</scope>
+	</dependency>
+
+
+	  <build>
+	    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
+	      <plugins>
+	        <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
+	        <plugin>
+	          <artifactId>maven-clean-plugin</artifactId>
+	          <version>3.1.0</version>
+	        </plugin>
+	        <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
+	        <plugin>
+	          <artifactId>maven-resources-plugin</artifactId>
+	          <version>3.0.2</version>
+	        </plugin>
+	        <plugin>
+	          <artifactId>maven-compiler-plugin</artifactId>
+	          <version>3.8.0</version>
+	        </plugin>
+	        <plugin>
+	          <artifactId>maven-surefire-plugin</artifactId>
+	          <version>2.22.1</version>
+	        </plugin>
+	        <plugin>
+	          <artifactId>maven-jar-plugin</artifactId>
+	          <version>3.0.2</version>
+	        </plugin>
+	        <plugin>
+	          <artifactId>maven-install-plugin</artifactId>
+	          <version>2.5.2</version>
+	        </plugin>
+	        <plugin>
+	          <artifactId>maven-deploy-plugin</artifactId>
+	          <version>2.8.2</version>
+	        </plugin>
+	        <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
+	        <plugin>
+	          <artifactId>maven-site-plugin</artifactId>
+	          <version>3.7.1</version>
+	        </plugin>
+	        <plugin>
+	          <artifactId>maven-project-info-reports-plugin</artifactId>
+	          <version>3.0.0</version>
+	        </plugin>
+	      </plugins>
+	    </pluginManagement>
+	  </build>
+</project>

src/main/java/com/maa/app/App.java

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+package com.maa.app;
+
+/**
+ * Hello world!
+ *
+ */
+public class App 
+{
+    public static void main( final String[] args) {
+        System.out.println( "Hello World!" );
+    }
+}

src/main/java/com/maa/app/pilha/Stack.java

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+package com.maa.app.pilha;
+
+import java.util.EmptyStackException;
+
+public class Stack {
+
+	private Object[] elements;
+	private int amount = 0;
+
+	public Stack(int max) {
+		elements = new Object[max];
+	}
+
+	public boolean isEmpty() {
+		return amount == 0;
+	}
+
+	public int size() {
+		return amount;
+	}
+
+	public void stackUp(Object element) {
+		this.elements[amount] = element;
+		amount++;
+	}
+
+	public Object top() {
+		return elements[amount - 1];
+	}
+
+	public Object unstack() {
+		if (isEmpty())
+			throw new EmptyStackException("Unable to unstack");
+
+		Object top = top();
+		amount--;		
+		return top;
+	}
+
+}

src/test/java/com/maa/app/AppTest.java

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+package com.maa.app;
+
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+/**
+ * Unit test for simple App.
+ */
+public class AppTest 
+{
+    /**
+     * Rigorous Test :-)
+     */
+    @Test
+    public void shouldAnswerWithTrue()
+    {
+        assertTrue( true );
+    }
+}

src/test/java/com/maa/app/pilha/EmptyStackException.java

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+package com.maa.app.pilha;
+
+public class EmptyStackException extends RuntimeException {
+
+	private static final long serialVersionUID = 1L;
+
+	public EmptyStackException(String message) {
+		super(message);
+	}
+
+}

src/test/java/com/maa/app/pilha/StackTest.java

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+package com.maa.app.pilha;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+class StackTest {
+
+	private Stack stack;
+
+	@BeforeEach
+	void initializeStack() {
+		stack = new Stack(10);
+	}
+
+	@Test
+	void emptyStack() {
+		assertTrue(stack.isEmpty());
+		assertEquals(0, stack.size());
+	}
+
+
+	@Test
+	void stackElement() {
+		stack.stackUp("First");
+		assertFalse(stack.isEmpty());
+		assertEquals(1, stack.size());
+		assertEquals("First", stack.top());
+	}
+
+	@Test
+	void stackUnstackElement() {
+		stack.stackUp("First");
+		stack.stackUp("Second");
+		assertFalse(stack.isEmpty());
+		assertEquals(2, stack.size());
+		assertEquals("Second", stack.top());
+		Object unstack = stack.unstack();
+		assertEquals(1, stack.size());
+		assertEquals("First", stack.top());
+		assertEquals("Second", unstack);
+	}
+
+	@Test(expected=EmptyStackException.class )
+	void removeFromStack() {
+		stack.unstack();
+	}
+
+
+}