update test

app/src/test/java/com/example/simpleparadox/listycity/failTest.java

@@ -0,0 +1,96 @@
+package com.example.simpleparadox.listycity;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class failTest {
+    private CityList mockCityList() {
+        CityList cityList = new CityList();
+        cityList.add(mockCity());
+        return cityList;
+    }
+
+    private City mockCity() {
+        return new City("Edmonton", "Alberta");
+    }
+
+    @Test
+    void testAdd() {
+        CityList cityList = mockCityList();
+
+        assertEquals(1, cityList.countCities());
+
+        cityList.add(new City("Regina", "Saskatchewan"));
+
+        assertEquals(2, cityList.countCities());
+        assertTrue(cityList.hasCity(new City("Regina", "Saskatchewan")));
+    }
+
+    @Test
+    void testAddException() {
+        CityList cityList = mockCityList();
+
+        City city = new City("Yellowknife", "Northwest Territories");
+        cityList.add(city);
+
+        assertThrows(IllegalArgumentException.class, () -> {
+            cityList.add(city);
+        });
+    }
+
+    @Test
+    void testHasCity() {
+        CityList cityList = mockCityList();
+
+        assertTrue(cityList.hasCity(mockCity()));
+    }
+
+    @Test
+    void testGetCities() {
+        CityList cityList = mockCityList();
+
+        assertEquals(0, mockCity().compareTo(cityList.getCities().get(0)));
+
+        City city = new City("Charlottetown", "Prince Edward Island");
+        cityList.add(city);
+
+        assertEquals(0, city.compareTo(cityList.getCities().get(0)));
+        assertEquals(0, mockCity().compareTo(cityList.getCities().get(1)));
+    }
+
+    @Test
+    void testDeleteCity() {
+        CityList cityList = mockCityList();
+
+        City city = new City("Victoria", "British Columbia");
+        cityList.add(city);
+
+        assertEquals(2, cityList.countCities());
+
+        cityList.delete(mockCity());
+
+        assertEquals(1, cityList.countCities());
+        assertEquals(0, city.compareTo(cityList.getCities().get(0)));
+    }
+
+    @Test
+    void testDeleteException() {
+        CityList cityList = mockCityList();
+
+        cityList.delete(mockCity());
+
+        assertThrows(IllegalArgumentException.class, () -> {
+            cityList.delete(mockCity());
+        });
+    }
+
+    @Test
+    void testCountCities() {
+        CityList cityList = mockCityList();
+
+        assertEquals(1, cityList.countCities());
+    }
+}