add

Author: Bascy6

app/src/main/java/hexlet/code/MapSchema.java

@@ -0,0 +1,30 @@
+package hexlet.code;
+
+import java.util.Map;
+
+public class MapSchema extends BaseSchema<MapSchema> {
+    private int requiredSize = -1;
+
+    @Override
+    public boolean isValid(Object value) {
+        if (!super.isValid(value)) {
+            return false;
+        }
+        if (value == null) {
+            return !isRequired;
+        }
+        if (!(value instanceof Map)) {
+            return false;
+        }
+        Map<?, ?> map = (Map<?, ?>) value;
+        if (requiredSize != -1 && map.size() != requiredSize) {
+            return false;
+        }
+        return true;
+    }
+
+    public MapSchema sizeof(int size) {
+        this.requiredSize = size;
+        return this;
+    }
+}

app/src/main/java/hexlet/code/StringSchema.java

@@ -20,14 +20,14 @@ public boolean isValid(Object value) {
             return false;
         }
         if (value == null) {
-            return !isRequired; // Если значение null, оно валидно только если isRequired == false
+            return !isRequired;
         }
         if (!(value instanceof String)) {
             return false;
         }
         String str = (String) value;
         if (isRequired && str.isEmpty()) {
-            return false; // Пустая строка не валидна, если isRequired == true
+            return false;
         }
         if (str.length() < minLength) {
             return false;

app/src/main/java/hexlet/code/Validator.java

@@ -8,4 +8,8 @@ public StringSchema string() {
     public NumberSchema number() {
         return new NumberSchema();
     }
+
+    public MapSchema map() {
+        return new MapSchema();
+    }
 }

app/src/test/java/hexlet/code/MapSchemaTest.java

@@ -0,0 +1,66 @@
+package hexlet.code;
+
+import org.junit.jupiter.api.Test;
+import java.util.HashMap;
+import java.util.Map;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+
+public class MapSchemaTest {
+
+    @Test
+    public void testDefaultSchema() {
+        Validator v = new Validator();
+        MapSchema schema = v.map();
+
+        assertTrue(schema.isValid(null));
+        assertTrue(schema.isValid(new HashMap<>()));
+    }
+
+    @Test
+    public void testRequired() {
+        Validator v = new Validator();
+        MapSchema schema = v.map().required();
+
+        assertFalse(schema.isValid(null));
+        assertTrue(schema.isValid(new HashMap<>()));
+
+        Map<String, String> data = new HashMap<>();
+        data.put("key1", "value1");
+        assertTrue(schema.isValid(data));
+    }
+
+    @Test
+    public void testSizeof() {
+        Validator v = new Validator();
+        MapSchema schema = v.map().sizeof(2);
+
+        Map<String, String> data = new HashMap<>();
+        data.put("key1", "value1");
+
+        assertFalse(schema.isValid(data));
+
+        data.put("key2", "value2");
+        assertTrue(schema.isValid(data));
+    }
+
+    @Test
+    public void testCombinedRules() {
+        Validator v = new Validator();
+        MapSchema schema = v.map()
+                .required()
+                .sizeof(2);
+
+        assertFalse(schema.isValid(null));
+
+        assertFalse(schema.isValid(new HashMap<>()));
+
+        Map<String, String> data = new HashMap<>();
+        data.put("key1", "value1");
+
+        assertFalse(schema.isValid(data));
+
+        data.put("key2", "value2");
+        assertTrue(schema.isValid(data));
+    }
+}