jackson support for kotlin

2019-04-28 20:30:24 +03:00
parent febda47e65
commit f8d8ef684d
7 changed files with 185 additions and 0 deletions
--- a/kotlin-libraries-2/src/test/kotlin/com/baeldung/kotlin/jackson/JacksonUnitTest.kt
+++ b/kotlin-libraries-2/src/test/kotlin/com/baeldung/kotlin/jackson/JacksonUnitTest.kt
@@ -0,0 +1,114 @@
+package com.baeldung.kotlin.jackson
+
+import org.junit.Test
+import kotlin.test.assertTrue
+import kotlin.test.assertFalse
+import kotlin.test.assertEquals
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.module.kotlin.readValue
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.fasterxml.jackson.module.kotlin.KotlinModule
+
+class JacksonUnitTest {
+    //val mapper = jacksonObjectMapper()   
+    val mapper = ObjectMapper().registerModule(KotlinModule())
+ 
+
+    @Test
+    fun whenSerializeMovie_thenSuccess() {               
+        val movie =  Movie("Endgame", "Marvel", 9.2f)
+        val serialized = mapper.writeValueAsString(movie)
+        
+        val json = """{"name":"Endgame","studio":"Marvel","rating":9.2}"""
+        assertEquals(serialized, json)      
+    }
+    
+    @Test
+    fun whenDeserializeMovie_thenSuccess() {               
+        val json = """{"name":"Endgame","studio":"Marvel","rating":9.2}"""
+        // val movie: Movie =  mapper.readValue(json)
+        val movie =  mapper.readValue<Movie>(json)
+        
+        assertEquals(movie.name, "Endgame")   
+        assertEquals(movie.studio, "Marvel")   
+        assertEquals(movie.rating, 9.2f)   
+    }
+    
+    @Test
+    fun whenDeserializeMovieWithMissingValue_thenUseDefaultValue() {               
+        val json = """{"name":"Endgame","studio":"Marvel"}"""
+        val movie: Movie =  mapper.readValue(json)
+        
+        assertEquals(movie.name, "Endgame")   
+        assertEquals(movie.studio, "Marvel")   
+        assertEquals(movie.rating, 1f)   
+    }     
+    
+    @Test
+    fun whenSerializeMap_thenSuccess() {               
+        val map =  mapOf(1 to "one", 2 to "two")
+        val serialized = mapper.writeValueAsString(map)
+        
+        val json = """{"1":"one","2":"two"}"""
+        assertEquals(serialized, json)      
+    }    
+    
+    @Test
+    fun whenDeserializeMap_thenSuccess() {               
+        val json = """{"1":"one","2":"two"}"""
+        val aMap: Map<Int,String> =  mapper.readValue(json)
+        
+        assertEquals(aMap[1], "one")   
+        assertEquals(aMap[2], "two")   
+    }
+    
+    @Test
+    fun whenSerializeList_thenSuccess() {
+        val movie1 =  Movie("Endgame", "Marvel", 9.2f)
+        val movie2 =  Movie("Shazam", "Warner Bros", 7.6f)
+        val movieList = listOf(movie1, movie2)
+        val serialized = mapper.writeValueAsString(movieList)
+        
+        val json = """[{"name":"Endgame","studio":"Marvel","rating":9.2},{"name":"Shazam","studio":"Warner Bros","rating":7.6}]"""
+        assertEquals(serialized, json)        
+    }
+    
+    @Test
+    fun whenDeserializeList_thenSuccess() {
+        val json = """[{"name":"Endgame","studio":"Marvel","rating":9.2},{"name":"Shazam","studio":"Warner Bros","rating":7.6}]"""
+        val movieList: List<Movie> = mapper.readValue(json)
+            
+        val movie1 =  Movie("Endgame", "Marvel", 9.2f)
+        val movie2 =  Movie("Shazam", "Warner Bros", 7.6f)
+        assertTrue(movieList.contains(movie1))                    
+        assertTrue(movieList.contains(movie2))                    
+    }
+    
+    @Test
+    fun whenSerializeBook_thenSuccess() {               
+        val book =  Book("Oliver Twist", "Charles Dickens")
+        val serialized = mapper.writeValueAsString(book)
+        
+        val json = """{"title":"Oliver Twist","author":"Charles Dickens"}"""
+        assertEquals(serialized, json)      
+    }    
+    
+    @Test
+    fun whenDeserializeBook_thenSuccess() {               
+        val json = """{"title":"Oliver Twist","author":"Charles Dickens"}"""
+        val book: Book =  mapper.readValue(json)
+        
+        assertEquals(book.title, "Oliver Twist")   
+        assertEquals(book.authorName, "Charles Dickens")   
+    }
+
+    @Test
+    fun givenJsonInclude_whenSerializeBook_thenEmptyFieldExcluded() {               
+        val book =  Book("Oliver Twist", "Charles Dickens")
+        val serialized = mapper.writeValueAsString(book)
+        
+        val json = """{"title":"Oliver Twist","author":"Charles Dickens"}"""
+        assertEquals(serialized, json)      
+    }
+    
+}