test: create test scenario to list

Signed-off-by: Otavio Santana <[email protected]>
o-s-expert · Nov 29, 2023 · 5b5e279 · 5b5e279
1 parent 250f933
commit 5b5e279
Show file tree

Hide file tree

Showing 2 changed files with 25 additions and 1 deletion.
diff --git a/core/src/main/java/expert/os/harperdb/JSONMapper.java b/core/src/main/java/expert/os/harperdb/JSONMapper.java
@@ -2,6 +2,7 @@
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.JavaType;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
@@ -45,7 +46,8 @@ <T> List<T> readValue(byte[] bytes, Class<T> type) {
             if(bytes == null || bytes.length == 0){
                 return Collections.emptyList();
             }
-            return mapper.readValue(bytes, new TypeReference<>() {});
+            JavaType javaType = mapper.getTypeFactory().constructParametricType(List.class, type);
+            return mapper.readValue(bytes, javaType);
         } catch (IOException exception) {
             throw new HarperDBException("There is an issue to read from json value", exception);
         }

diff --git a/core/src/test/java/expert/os/harperdb/JSONMapperTest.java b/core/src/test/java/expert/os/harperdb/JSONMapperTest.java
@@ -1,8 +1,10 @@
 package expert.os.harperdb;
 
+import org.assertj.core.api.Assertions;
 import org.assertj.core.api.SoftAssertions;
 import org.junit.jupiter.api.Test;
 
+import java.util.List;
 import java.util.Optional;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -40,4 +42,24 @@ void shouldReturnEntityFromJSON() {
             softly.assertThat(schema.name()).isEqualTo("test");
         });
     }
+
+    @Test
+    void shouldReturnEmptyListWhenByteIsNull() {
+        List<CreateSchema> schemas = mapper.readValue(null, CreateSchema.class);
+        Assertions.assertThat(schemas).isNotNull().isEmpty();
+    }
+
+    @Test
+    void shouldReturnEmptyListWhenByteIsEmpty() {
+        List<CreateSchema> schemas = mapper.readValue(new byte[0], CreateSchema.class);
+        Assertions.assertThat(schemas).isNotNull().isEmpty();
+    }
+
+    @Test
+    void shouldReturnListOfEntitiesFromJSON() {
+        String expected = "[{\"id\":\"1\",\"name\":\"Lion\"}, {\"id\":\"2\",\"name\":\"Dog\"}]";
+        List<Animal> animals = mapper.readValue(expected.getBytes(), Animal.class);
+        Assertions.assertThat(animals).isNotNull().isNotEmpty().hasSize(2)
+                .extracting(Animal::id).contains("1", "2");
+    }
 }