docs(qmp): iteration IV

04-lecture/qmp.md

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+# Que me Pongo - Iteration IV
+
+## Requirements
+
+> Be able to know the climatic conditions of Buenos Aires at a given moment
+
+```java
+new AppiWeatherAPI().getWeather();
+```
+
+> Be able to receive suggestions for outfits that have a garment for each category
+
+```java
+class Outfit{
+    List<Garment> body;
+    List<Garment> legs;
+    List<Garment> shoes;
+    List<Garment> accesories;
+}
+```
+
+> Garments to be in accordance with the current temperature when generating a suggestion
+
+```java
+class User{
+    // It is important to the Garments to be stored in their owner
+    Set<Garment> wardrobe;
+
+    // Fisrt instinct must be to have its logic in its class
+    public Outfit suggestOutfit(){
+        //...
+    }
+}
+```
+
+Using an abstraction...
+
+```java
+
+class User{
+    Wardrobe wardrobe;
+
+    public Outfit getSuggestion(){
+        return this.wardrobe.suggestOutfit();
+    }
+}
+
+class Wardrobe{
+    Set<Garment> wardrobe;
+
+    Outfit suggestOutfit(){
+        //...
+    }
+}
+```
+
+> Configure different weather retrieval services easily
+
+```java
+interface WeatherService{
+    BigDecimal getTemperature();
+}
+
+class AccuWeatherWehaterService{
+    private api = new AccuWeatherAPI();
+
+    @Override
+    BigDecimal getTemperature(){
+        // AccuWeather translation
+    }
+}
+```
+
+> Ensure the quality of my application without incurring unnecessary costs
+
+Short answer `dependy injection` and `mock` when testing
+
+```java
+class WeatherServiceTest{
+
+    @BeforeEach
+    void setUpFixture(){
+        WeatherService service = new MockWeatherService();
+        User rolli = new User(service, ...);
+    }
+
+    @Test
+    void outfitSuggestion(){
+        service.setWeather(Weather.COLD);
+        Outfit outfit = roli.suggestOutfit();
+        assertTrue( outfit.anyGarment( g -> g.typeIs(Type.JACKET)), true)
+
+    }
+}
+```