Added tests for Travis to fail if the jsons don't parse or something

.gitignore

@@ -135,3 +135,4 @@ android/release/android.aab
 android/assets/maps/
 android/release/android.aab.sig
 android/release/android-release.aab
+tests/build/

build.gradle

@@ -128,7 +128,45 @@ project(":core") {
         implementation "com.badlogicgames.gdx:gdx-freetype:$gdxVersion"
         implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion"
     }
-}
+
+
+    // Taken from https://github.com/TomGrill/gdx-testing
+    project(":tests") {
+        apply plugin: "java"
+
+        test{
+            workingDir= file("../android/assets")
+        }
+
+        sourceSets.test.java.srcDirs = ["src/"]
+
+        dependencies {
+
+            /**
+             * If you do have some classes to test in os specific code you may want to uncomment
+             * some of these lines.
+             *
+             * BUT: I recommend to create seperate test sub projects for each platform. Trust me :)
+             *
+             */
+
+
+            compile project(":core")
+
+            compile "junit:junit:4.12"
+            compile "org.mockito:mockito-all:1.9.5"
+
+            compile "com.badlogicgames.gdx:gdx-backend-headless:$gdxVersion"
+            compile "com.badlogicgames.gdx:gdx:$gdxVersion"
+
+            testCompile 'junit:junit:4.12'
+            testCompile "org.mockito:mockito-all:1.9.5"
+
+            testCompile "com.badlogicgames.gdx:gdx-backend-headless:$gdxVersion"
+            testCompile "com.badlogicgames.gdx:gdx:$gdxVersion"
+            testCompile "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-desktop"
+        }
+    }}
 
 tasks.eclipse.doLast {
     delete ".project"

settings.gradle

@@ -1 +1 @@
-include 'desktop', 'android', 'ios', 'html', 'core'
+include 'desktop', 'android', 'ios', 'html', 'core', 'tests'

tests/build.gradle

@@ -0,0 +1,22 @@
+
+
+apply plugin: "java"
+
+sourceCompatibility = 1.6
+[compileJava, compileTestJava]*.options*.encoding = 'UTF-8'
+
+
+
+sourceSets {
+	test {
+        java {
+            srcDir 'src'
+        }
+    }
+    
+    
+}
+
+eclipse.project {
+    name = appName + "-tests"
+}

tests/src/de/tomgrill/gdxtesting/GdxTestRunner.java

@@ -0,0 +1,104 @@
+/*******************************************************************************
+ * Copyright 2015 See AUTHORS file.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ ******************************************************************************/
+
+package de.tomgrill.gdxtesting;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.runner.notification.RunNotifier;
+import org.junit.runners.BlockJUnit4ClassRunner;
+import org.junit.runners.model.FrameworkMethod;
+import org.junit.runners.model.InitializationError;
+
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.graphics.GL20;
+import static org.mockito.Mockito.mock;
+
+import com.badlogic.gdx.ApplicationListener;
+import com.badlogic.gdx.backends.headless.HeadlessApplication;
+import com.badlogic.gdx.backends.headless.HeadlessApplicationConfiguration;
+
+public class GdxTestRunner extends BlockJUnit4ClassRunner implements ApplicationListener {
+
+	private Map<FrameworkMethod, RunNotifier> invokeInRender = new HashMap<FrameworkMethod, RunNotifier>();
+
+	public GdxTestRunner(Class<?> klass) throws InitializationError {
+		super(klass);
+		HeadlessApplicationConfiguration conf = new HeadlessApplicationConfiguration();
+
+		new HeadlessApplication(this, conf);
+		Gdx.gl = mock(GL20.class);
+	}
+
+	@Override
+	public void create() {
+	}
+
+	@Override
+	public void resume() {
+	}
+
+	@Override
+	public void render() {
+		synchronized (invokeInRender) {
+			for (Map.Entry<FrameworkMethod, RunNotifier> each : invokeInRender.entrySet()) {
+				super.runChild(each.getKey(), each.getValue());
+			}
+			invokeInRender.clear();
+		}
+	}
+
+	@Override
+	public void resize(int width, int height) {
+	}
+
+	@Override
+	public void pause() {
+	}
+
+	@Override
+	public void dispose() {
+	}
+
+	@Override
+	protected void runChild(FrameworkMethod method, RunNotifier notifier) {
+		synchronized (invokeInRender) {
+			// add for invoking in render phase, where gl context is available
+			invokeInRender.put(method, notifier);
+		}
+		// wait until that test was invoked
+		waitUntilInvokedInRenderMethod();
+	}
+
+	/**
+	    *
+	    */
+	private void waitUntilInvokedInRenderMethod() {
+		try {
+			while (true) {
+				Thread.sleep(10);
+				synchronized (invokeInRender) {
+					if (invokeInRender.isEmpty())
+						break;
+				}
+			}
+		} catch (InterruptedException e) {
+			e.printStackTrace();
+		}
+	}
+
+}

tests/src/de/tomgrill/gdxtesting/examples/AssetExistsExampleTest.java

@@ -0,0 +1,30 @@
+//  Taken from https://github.com/TomGrill/gdx-testing
+
+package de.tomgrill.gdxtesting.examples;
+
+import com.badlogic.gdx.Gdx;
+import com.unciv.models.gamebasics.GameBasics;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import de.tomgrill.gdxtesting.GdxTestRunner;
+
+import static org.junit.Assert.assertTrue;
+
+@RunWith(GdxTestRunner.class)
+public class AssetExistsExampleTest {
+
+	@Test
+	public void gamePngExists() {
+		assertTrue("This test will only pass when the game.png exists",
+				Gdx.files.local("game.png").exists());
+	}
+
+	@Test
+	public void gameBasicsLoad() {
+		assertTrue("This test will only pass when the game.png exists",
+				GameBasics.INSTANCE.getBuildings().size() > 0);
+	}
+
+}

tests/src/de/tomgrill/gdxtesting/examples/UnitTestExample.java

@@ -0,0 +1,30 @@
+/*******************************************************************************
+ * Copyright 2015 See AUTHORS file.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ ******************************************************************************/
+
+package de.tomgrill.gdxtesting.examples;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class UnitTestExample {
+
+	@Test
+	public void oneEqualsOne() {
+		assertEquals(1, 1);
+	}
+
+}