add getEverySecondField in ai-logic

src/main/java/de/tims/fleetstorm/ai/Logic.java

@@ -22,4 +22,17 @@ public class Logic {
 		return possibleFields.get(randy.nextInt(possibleFields.size()));
 	}
 
+	public ArrayList<Coordinate> getEverySecondField(Matchfield matchfield) {
+		ArrayList<Coordinate> out = new ArrayList<Coordinate>();
+		for (int x = 0; x < Math.sqrt(matchfield.getSize()); x++) {
+			for (int y = 0; y < Math.sqrt(matchfield.getSize()); y++) {
+				if ((x % 2 == 0 && y % 2 == 0) || (x % 2 == 1 && y % 2 == 1)) {
+					out.add(matchfield.getField(x, y));
+				}
+			}
+		}
+
+		return out;
+	}
+
 }

src/test/java/de/tims/fleetstorm/ai/LogicTest.java

@@ -1,8 +1,11 @@
 package de.tims.fleetstorm.ai;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 
+import java.util.ArrayList;
+
 import org.junit.jupiter.api.Test;
 
 import de.tims.fleetstorm.matchfield.Coordinate;
@@ -31,13 +34,39 @@ class LogicTest {
 
 		for (int x = 0; x < size; x++) {
 			for (int y = 0; y < size; y++) {
-				// matchfield.setState(x, y, Matchfield.SHOT);
+				matchfield.setState(x, y, Coordinate.SHOT);
 			}
 		}
-		// matchfield.setState(0, 0, Matchfield.EMPTY);
+		matchfield.setState(2, 2, Coordinate.EMPTY);
 
 		Coordinate choosenField = logic.chooseField(matchfield);
 		int calcState = matchfield.getState(choosenField.getX(), choosenField.getY());
 		assertNotEquals(calcState, Coordinate.SHOT);
 	}
+
+	@Test
+	void testGetEverySecondField() {
+		Logic logic = new Logic();
+		Matchfield matchfield;
+		int size = 4;
+		matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+
+		ArrayList<Coordinate> everySecondField = logic.getEverySecondField(matchfield);
+		ArrayList<Coordinate> expectedResult = new ArrayList<Coordinate>();
+
+		expectedResult.add(new Coordinate(0, 0));
+		expectedResult.add(new Coordinate(0, 2));
+		expectedResult.add(new Coordinate(1, 1));
+		expectedResult.add(new Coordinate(1, 3));
+		expectedResult.add(new Coordinate(2, 0));
+		expectedResult.add(new Coordinate(2, 2));
+		expectedResult.add(new Coordinate(3, 1));
+		expectedResult.add(new Coordinate(3, 3));
+
+		for (int i = 0; i < expectedResult.size(); i++) {
+			assertEquals(everySecondField.get(i).getX(), expectedResult.get(i).getX());
+			assertEquals(everySecondField.get(i).getY(), expectedResult.get(i).getY());
+		}
+	}
 }