Kotlin: fix default value (#882)

src/main/resources/templates/kotlin-lang/request.ftl

@@ -107,7 +107,7 @@ open class ${className}(private val alias: String?) : GraphQLOperationRequest {
         <#else>
         <#if MapperUtil.isKotlinPrimitive(field.type)>
         <#assign default = MapperUtil.defaultValueKotlinPrimitive(field.type)/>
-        private var ${field.name}: ${field.type} = default
+        private var ${field.name}: ${field.type} = ${default}
         <#else>
         private lateinit var ${field.name}: ${field.type}
         </#if>

src/test/java/com/kobylynskyi/graphql/codegen/kotlin/GraphQLCodegenGitHubTest.java

@@ -19,6 +19,7 @@ import static com.kobylynskyi.graphql.codegen.TestUtils.getFileByName;
 import static java.util.Collections.singletonList;
 import static org.hamcrest.MatcherAssert.assertThat;
 
+
 class GraphQLCodegenGitHubTest {
 
     private final File outputBuildDir = new File("build/generated");
@@ -187,4 +188,16 @@ class GraphQLCodegenGitHubTest {
                 getFileByName(files, "AcceptTopicSuggestionPayloadResolver.kt"));
     }
 
+    @Test
+    void generate_RequestWithDefaultValue() throws Exception {
+        mappingConfig.setGenerateBuilder(true);
+        mappingConfig.setGenerateClient(true);
+        new KotlinGraphQLCodegen(singletonList("src/test/resources/schemas/kt/default.graphqls"),
+                outputBuildDir, mappingConfig, TestUtils.getStaticGeneratedInfo()).generate();
+        File[] files = Objects.requireNonNull(outputktClassesDir.listFiles());
+        assertSameTrimmedContent(new File("src/test/resources/expected-classes/kt/default/" +
+                        "FriendsQueryRequest.kt.txt"),
+                getFileByName(files, "FriendsQueryRequest.kt"));
+    }
+
 }
\ No newline at end of file

src/test/resources/expected-classes/kt/default/FriendsQueryRequest.kt.txt

+package com.github.graphql
+
+import com.kobylynskyi.graphql.codegen.model.graphql.GraphQLOperation
+import com.kobylynskyi.graphql.codegen.model.graphql.GraphQLOperationRequest
+import java.util.Objects
+
+@javax.annotation.Generated(
+    value = ["com.kobylynskyi.graphql.codegen.GraphQLCodegen"],
+    date = "2020-12-31T23:59:59-0500"
+)
+open class FriendsQueryRequest(private val alias: String?) : GraphQLOperationRequest {
+
+    companion object {
+        const val OPERATION_NAME: String = "friends"
+        val OPERATION_TYPE: GraphQLOperation = GraphQLOperation.QUERY
+
+        @JvmStatic fun builder(): Builder = Builder()
+    }
+
+    private val input: MutableMap<String, Any?> = LinkedHashMap()
+    private val useObjectMapperForInputSerialization: MutableSet<String> = HashSet()
+
+    constructor(): this(null)
+
+    fun setNum(num: Int) {
+        this.input["num"] = num
+    }
+
+    override fun getOperationType(): GraphQLOperation = OPERATION_TYPE
+
+    override fun getOperationName(): String = OPERATION_NAME
+
+    override fun getAlias(): String? = alias ?: OPERATION_NAME
+
+    override fun getInput(): MutableMap<String, Any?> = input
+
+    override fun getUseObjectMapperForInputSerialization(): MutableSet<String> = useObjectMapperForInputSerialization
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) {
+            return true
+        }
+        if (other == null || javaClass != other.javaClass) {
+            return false
+        }
+        val that = other as FriendsQueryRequest
+        return Objects.equals(operationType, that.operationType) &&
+                   Objects.equals(operationName, that.operationName) &&
+                   Objects.equals(input, that.input)
+    }
+
+    override fun hashCode(): Int = Objects.hash(operationType, operationName, input)
+
+    override fun toString(): String = Objects.toString(input)
+
+    class Builder {
+
+        private var `$alias`: String? = null
+        private var num: Int = 0
+
+        fun alias(alias: String?): Builder {
+            this.`$alias` = alias
+            return this
+        }
+
+        fun setNum(num: Int): Builder {
+            this.num = num
+            return this
+        }
+
+        fun build(): FriendsQueryRequest {
+            val obj = FriendsQueryRequest(`$alias`)
+            obj.setNum(num)
+            return obj
+        }
+
+    }
+}
\ No newline at end of file

src/test/resources/schemas/kt/default.graphqls

+type Query {
+    friends(num: Int!): [Friend]
+}
+
+type Friend {
+    name: String
+}
\ No newline at end of file