add java-tdd module

java-tdd/.gitignore

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+/.idea/
+/target/
+*.iml

java-tdd/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>fr.jakubowski</groupId>
+  <artifactId>java-tdd</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <dependencies>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter</artifactId>
+      <version>5.6.0</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.assertj</groupId>
+      <artifactId>assertj-core</artifactId>
+      <version>3.15.0</version>
+    </dependency>
+    <dependency>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-core</artifactId>
+      <version>3.3.3</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <configuration>
+          <source>11</source>
+          <target>11</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>

java-tdd/src/main/java/RomanNumeral.java

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+public class RomanNumeral {
+
+    public static String convert(int arabicNumber) {
+        return "";
+    }
+}

java-tdd/src/test/java/RomanNumeralTest.java

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+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class RomanNumeralTest {
+    @Test
+    public void firstTest() {
+        assertThat(RomanNumeral.convert(0)).isEqualTo("");
+    }
+
+}