feature: added unit tests

build.gradle

@@ -12,6 +12,7 @@ repositories {
 dependencies {
     testImplementation platform('org.junit:junit-bom:5.10.0')
     testImplementation 'org.junit.jupiter:junit-jupiter'
+    testImplementation 'org.mockito:mockito-core:5.18.0'
     implementation 'org.json:json:20250517'
 }
 

src/main/java/ru/dima/weather/WeatherApp.java

@@ -5,12 +5,8 @@ import ru.dima.weather.cli.CLIInputReader;
 import ru.dima.weather.cli.WeatherProviderCLISelector;
 import ru.dima.weather.http.HttpRequester;
 import ru.dima.weather.provider.OpenWeatherMapWeatherProvider;
-import ru.dima.weather.provider.WeatherProvider;
 import ru.dima.weather.provider.WeatherProviderRegistry;
 
-import java.util.Scanner;
-import java.util.stream.Collectors;
-
 /*
  1. Брать текущий IP
  2. Определять город по текущему IP

src/main/java/ru/dima/weather/city/CityByIpResolver.java

@@ -13,6 +13,8 @@ public class CityByIpResolver {
     }
 
     public String getCurrentCityViaIP() {
-        return httpRequester.getString(IP_INFO_URL).replace("\n", "").replace("\r", "");
+        return httpRequester.getString(IP_INFO_URL)
+                .replace("\n", "")
+                .replace("\r", "");
     }
 }

src/main/java/ru/dima/weather/provider/OpenWeatherMapWeatherProvider.java

@@ -6,6 +6,7 @@ import ru.dima.weather.http.HttpRequester;
 import java.util.Map;
 import java.util.stream.Collectors;
 
+
 public class OpenWeatherMapWeatherProvider implements WeatherProvider {
 
     private HttpRequester httpRequester;

src/test/java/ru/dima/weather/city/CityByIpResolverTest.java

@@ -0,0 +1,24 @@
+package ru.dima.weather.city;
+
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import ru.dima.weather.http.HttpRequester;
+
+import java.util.UUID;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class CityByIpResolverTest {
+
+    @Test
+    void mustReturnPlaintextCityFromIp() {
+        var mockHttpRequester = Mockito.mock(HttpRequester.class);
+        var cityByIpResolver = new CityByIpResolver(mockHttpRequester);
+        var randomCityName = UUID.randomUUID().toString();
+
+        Mockito.when(mockHttpRequester.getString(Mockito.any())).thenReturn(randomCityName);
+
+        var currentCity = cityByIpResolver.getCurrentCityViaIP();
+        assertEquals(randomCityName, currentCity);
+    }
+}