src/test/java/lecture_18_repetition/AirLockTest.java

+package lecture_18_repetition;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+class AirLockTest {
+
+	IAirLock doors;
+	
+	@BeforeEach
+	void setup() {
+		doors = new AirLock();
+	}
+	
+	@Test
+	void testDoorsStartsAsClosed() {
+		assertFalse(doors.innerIsOpen(),"Doors should start as closed.");
+		assertFalse(doors.outerIsOpen(),"Doors should start as closed.");
+	}
+	
+	@Test
+	void testDoorsCanInitiallyBeOpened() {
+		doors.openInner();
+		assertTrue(doors.innerIsOpen());
+
+		doors = new AirLock();
+		doors.openOuter();
+		assertTrue(doors.outerIsOpen());
+	}
+
+	@Test
+	void testDoorsCanBeOpenedAndClosed() {
+		doors.openInner();
+		assertTrue(doors.innerIsOpen());
+		doors.closeInner();
+		assertFalse(doors.innerIsOpen());
+
+		doors.openOuter();
+		assertTrue(doors.outerIsOpen());
+		doors.closeOuter();
+		assertFalse(doors.outerIsOpen());
+	}
+
+	@Test
+	void testDoorsCannotBothBeOpen() {
+		doors.openInner();
+		assertTrue(doors.innerIsOpen());
+		doors.openOuter();
+		assertFalse(doors.outerIsOpen());
+
+		doors = new AirLock();
+		doors.openOuter();
+		assertTrue(doors.outerIsOpen());
+		doors.openInner();
+		assertFalse(doors.innerIsOpen());
+
+	}
+	
+	@Test
+	void testLookedDoorsCanNotOpen() {
+		doors.lockInner();
+		doors.openInner();
+		assertFalse(doors.innerIsOpen());
+
+		doors.lockOuter();
+		doors.openOuter();
+		assertFalse(doors.outerIsOpen());
+		
+		doors.unLockInner();
+		doors.openInner();
+		assertTrue(doors.innerIsOpen());
+
+	}
+
+	@Test
+	void testUnLock() {
+		doors.lockInner();
+		doors.lockOuter();
+		doors.openInner();
+		assertFalse(doors.innerIsOpen());
+		doors.openOuter();
+		assertFalse(doors.outerIsOpen());
+
+		doors.unLockInner();
+		doors.openInner();
+		assertTrue(doors.innerIsOpen());
+		doors.closeInner();
+		doors.openOuter();
+		assertFalse(doors.outerIsOpen());
+		doors.lockInner();
+		
+		doors.unLockOuter();
+		doors.openOuter();
+		assertTrue(doors.outerIsOpen());
+		doors.closeOuter();
+		doors.openInner();
+		assertFalse(doors.innerIsOpen());
+	}
+
+	@Test
+	void testCanNotLockOpenDors() {
+		doors.openInner();
+		doors.lockInner();
+		assertTrue(doors.innerIsOpen());
+		doors.closeInner();
+		assertFalse(doors.innerIsOpen());
+		doors.openInner();
+		assertTrue(doors.innerIsOpen());
+	}
+
+	
+}