Add Travis CI build

.travis.yml

@@ -0,0 +1,3 @@
+language: java
+jdk:
+  - oraclejdk8

build.gradle

@@ -45,8 +45,8 @@ repositories {
 dependencies {
     testCompile group: 'org.junit.jupiter', name: 'junit-jupiter-api', version: '5.0.0-M4'
 
-//    Enabling makes the Gradle plugin work but breaks IDEA
-//    testRuntime group: 'org.junit.jupiter', name: 'junit-jupiter-engine', version: '5.0.0-M4'
+    // Enabling makes the Gradle plugin work but breaks IDEA
+    testRuntime group: 'org.junit.jupiter', name: 'junit-jupiter-engine', version: '5.0.0-M4'
 
     compile group: 'org.languagetool', name: 'language-all', version: '3.7'
 

src/test/java/DocumentPositionCalculatorTest.java

@@ -5,41 +5,41 @@
 public class DocumentPositionCalculatorTest {
 
     public final DocumentPositionCalculator sut = new DocumentPositionCalculator("Hello\n" +
-                                           "Enthusiastic\r\n" +
-                                           "Reader!");
+            "Enthusiastic\r\n" +
+            "Reader!");
 
     @Test
-    public void testGetPosition_first_character(){
+    public void testGetPosition_first_character() {
         Position position = sut.getPosition(0);
 
-        Assertions.assertEquals(new Position(0, 0),position);
+        Assertions.assertEquals(new Position(0, 0), position);
     }
 
     @Test
-    public void testGetPosition_starts_with_newline(){
-        Position position = sut.getPosition(1);
+    public void testGetPosition_starts_with_newline() {
+        Position position = new DocumentPositionCalculator("\nHi").getPosition(1);
 
-        Assertions.assertEquals(new Position(1, 0),position);
+        Assertions.assertEquals(new Position(1, 0), position);
     }
 
     @Test
-    public void testGetPosition_second_start(){
+    public void testGetPosition_second_line_start() {
         Position position = sut.getPosition(6);
 
-        Assertions.assertEquals(new Position(1, 0),position);
+        Assertions.assertEquals(new Position(1, 0), position);
     }
 
     @Test
-    public void testGetPosition_second_line_second_character(){
+    public void testGetPosition_second_line_second_character() {
         Position position = sut.getPosition(7);
 
-        Assertions.assertEquals(new Position(1, 1),position);
+        Assertions.assertEquals(new Position(1, 1), position);
     }
 
     @Test
-    public void testGetPosition(){
+    public void testGetPosition_arbitrary_position() {
         Position position = sut.getPosition(12);
 
-        Assertions.assertEquals(new Position(1, 6),position);
+        Assertions.assertEquals(new Position(1, 6), position);
     }
 }