Support non-data classes for generated JsonAdapters

This is towards making the reflection and codegen adapters work the same.
The process is relatively straightforward: try to promote all of the tests
in KotlinCodeGenTest to be passing tests in GeneratedAdaptersTest or
compile failures in CompilerTest

kotlin-codegen/compiler/src/main/java/com/squareup/moshi/AdapterGenerator.kt

@@ -35,20 +35,17 @@ import javax.lang.model.util.Elements
 
 /** Generates a JSON adapter for a target type. */
 internal class AdapterGenerator(
-  val fqClassName: String,
-  val packageName: String,
+  val className: ClassName,
   val propertyList: List<PropertyGenerator>,
   val originalElement: Element,
-  name: String = fqClassName.substringAfter(packageName)
-      .replace('.', '_')
-      .removePrefix("_"),
+  val isDataClass: Boolean,
   val hasCompanionObject: Boolean,
   val visibility: ProtoBuf.Visibility,
   val elements: Elements,
   val genericTypeNames: List<TypeVariableName>?
 ) {
   val nameAllocator = NameAllocator()
-  val adapterName = "${name}JsonAdapter"
+  val adapterName = "${className.simpleNames().joinToString(separator = "_")}JsonAdapter"
   val originalTypeName = originalElement.asType().asTypeName()
 
   val moshiParam = ParameterSpec.builder(
@@ -92,7 +89,7 @@ internal class AdapterGenerator(
       property.allocateNames(nameAllocator)
     }
 
-    val result = FileSpec.builder(packageName, adapterName)
+    val result = FileSpec.builder(className.packageName(), adapterName)
     if (hasCompanionObject) {
       result.addFunction(generateJsonAdapterFun())
     }
@@ -148,6 +145,8 @@ internal class AdapterGenerator(
   }
 
   private fun generateFromJsonFun(): FunSpec {
+    val resultName = nameAllocator.newName("result")
+
     val result = FunSpec.builder("fromJson")
         .addModifiers(KModifier.OVERRIDE)
         .addParameter(readerParam)
@@ -187,36 +186,72 @@ internal class AdapterGenerator(
     result.endControlFlow() // while
     result.addStatement("%N.endObject()", readerParam)
 
-    val propertiesWithoutDefaults = propertyList.filter { !it.hasDefault }
-    result.addCode("%[return %T(\n", originalTypeName)
-    propertiesWithoutDefaults.forEachIndexed { index, property ->
+    // Call the constructor providing only required parameters.
+    var hasOptionalParameters = false
+    result.addCode("%[var %N = %T(", resultName, originalTypeName)
+    var separator = "\n"
+    for (property in propertyList) {
+      if (!property.hasConstructorParameter) {
+        continue
+      }
+      if (property.hasDefault) {
+        hasOptionalParameters = true
+        continue
+      }
+      result.addCode(separator)
       result.addCode("%N = %N", property.name, property.localName)
       if (property.isRequired) {
         result.addCode(" ?: throw %T(\"Required property '%L' missing at \${%N.path}\")",
             JsonDataException::class, property.localName, readerParam)
       }
-      result.addCode(if (index + 1 < propertiesWithoutDefaults.size) ",\n" else "\n")
+      separator = ",\n"
     }
-    result.addCode("%])\n", originalTypeName)
+    result.addCode(")%]\n", originalTypeName)
 
-    val propertiesWithDefaults = propertyList.filter { it.hasDefault }
-    if (!propertiesWithDefaults.isEmpty()) {
-      result.addCode(".let {%>\n")
-      result.addCode("%[it.copy(\n")
-      propertiesWithDefaults.forEachIndexed { index, property ->
-        if (property.differentiateAbsentFromNull) {
-          result.addCode("%1N = if (%2N) %3N else it.%1N",
-              property.name, property.localIsPresentName, property.localName)
-        } else {
-          result.addCode("%1N = %2N ?: it.%1N",
-              property.name, property.localName)
+    // Call either the constructor again, or the copy() method, this time providing any optional
+    // parameters that we have.
+    if (hasOptionalParameters) {
+      if (isDataClass) {
+        result.addCode("%[%1N = %1N.copy(", resultName)
+      } else {
+        result.addCode("%[%1N = %2T(", resultName, originalTypeName)
+      }
+      separator = "\n"
+      for (property in propertyList) {
+        if (!property.hasConstructorParameter) {
+          continue // No constructor parameter for this property.
         }
-        result.addCode(if (index + 1 < propertiesWithDefaults.size) ",\n" else "\n")
+        if (isDataClass && !property.hasDefault) {
+          continue // Property already assigned.
+        }
+
+        result.addCode(separator)
+        if (property.differentiateAbsentFromNull) {
+          result.addCode("%2N = if (%3N) %4N else %1N.%2N",
+              resultName, property.name, property.localIsPresentName, property.localName)
+        } else {
+          result.addCode("%2N = %3N ?: %1N.%2N", resultName, property.name, property.localName)
+        }
+        separator = ",\n"
       }
       result.addCode("%])\n")
-      result.addCode("%<}\n")
     }
 
+    // Assign properties not present in the constructor.
+    for (property in propertyList) {
+      if (property.hasConstructorParameter) {
+        continue // Property already handled.
+      }
+      if (property.differentiateAbsentFromNull) {
+        result.addStatement("%1N.%2N = if (%3N) %4N else %1N.%2N",
+            resultName, property.name, property.localIsPresentName, property.localName)
+      } else {
+        result.addStatement("%1N.%2N = %3N ?: %1N.%2N",
+            resultName, property.name, property.localName)
+      }
+    }
+
+    result.addStatement("return %1N", resultName)
     return result.build()
   }
 
@@ -244,8 +279,7 @@ internal class AdapterGenerator(
 
   private fun generateJsonAdapterFun(): FunSpec {
     val rawType = when (originalTypeName) {
-      is TypeVariableName -> throw IllegalArgumentException(
-          "Cannot get raw type of TypeVariable!")
+      is TypeVariableName -> throw IllegalArgumentException("Cannot get raw type of TypeVariable!")
       is ParameterizedTypeName -> originalTypeName.rawType
       else -> originalTypeName as ClassName
     }

kotlin-codegen/compiler/src/main/java/com/squareup/moshi/JsonClassCodeGenProcessor.kt

@@ -17,13 +17,16 @@ package com.squareup.moshi
 
 import com.google.auto.common.AnnotationMirrors
 import com.google.auto.service.AutoService
+import com.squareup.kotlinpoet.ClassName
 import com.squareup.kotlinpoet.KModifier.OUT
+import com.squareup.kotlinpoet.ParameterizedTypeName
 import com.squareup.kotlinpoet.TypeSpec
 import com.squareup.kotlinpoet.TypeVariableName
+import com.squareup.kotlinpoet.asTypeName
 import me.eugeniomarletti.kotlin.metadata.KotlinClassMetadata
 import me.eugeniomarletti.kotlin.metadata.KotlinMetadataUtils
+import me.eugeniomarletti.kotlin.metadata.classKind
 import me.eugeniomarletti.kotlin.metadata.declaresDefaultValue
-import me.eugeniomarletti.kotlin.metadata.extractFullName
 import me.eugeniomarletti.kotlin.metadata.isDataClass
 import me.eugeniomarletti.kotlin.metadata.isPrimary
 import me.eugeniomarletti.kotlin.metadata.jvm.getJvmConstructorSignature
@@ -31,14 +34,17 @@ import me.eugeniomarletti.kotlin.metadata.kotlinMetadata
 import me.eugeniomarletti.kotlin.metadata.visibility
 import me.eugeniomarletti.kotlin.processing.KotlinAbstractProcessor
 import org.jetbrains.kotlin.serialization.ProtoBuf
+import org.jetbrains.kotlin.serialization.ProtoBuf.ValueParameter
 import java.io.File
 import javax.annotation.processing.Processor
 import javax.annotation.processing.RoundEnvironment
 import javax.lang.model.SourceVersion
+import javax.lang.model.element.AnnotationMirror
 import javax.lang.model.element.Element
 import javax.lang.model.element.ElementKind
 import javax.lang.model.element.ExecutableElement
 import javax.lang.model.element.TypeElement
+import javax.lang.model.element.VariableElement
 import javax.tools.Diagnostic.Kind.ERROR
 
 /**
@@ -77,24 +83,24 @@ class JsonClassCodeGenProcessor : KotlinAbstractProcessor(), KotlinMetadataUtils
     val metadata = element.kotlinMetadata
 
     if (metadata !is KotlinClassMetadata) {
-      errorMustBeDataClass(element)
+      errorMustBeKotlinClass(element)
       return null
     }
 
     val classData = metadata.data
     val (nameResolver, classProto) = classData
 
-    fun ProtoBuf.Type.extractFullName() = extractFullName(classData)
-
-    if (!classProto.isDataClass) {
-      errorMustBeDataClass(element)
+    if (classProto.classKind != ProtoBuf.Class.Kind.CLASS) {
+      errorMustBeKotlinClass(element)
       return null
     }
 
-    val fqClassName = nameResolver.getString(classProto.fqName).replace('/', '.')
-
-    val packageName = nameResolver.getString(classProto.fqName).substringBeforeLast('/').replace(
-        '/', '.')
+    val typeName = element.asType().asTypeName()
+    val className = when (typeName) {
+      is ClassName -> typeName
+      is ParameterizedTypeName -> typeName.rawType
+      else -> throw IllegalStateException("unexpected TypeName: ${typeName::class}")
+    }
 
     val hasCompanionObject = classProto.hasCompanionObjectName()
     // todo allow custom constructor
@@ -113,34 +119,49 @@ class JsonClassCodeGenProcessor : KotlinAbstractProcessor(), KotlinMetadataUtils
         .first()
     // TODO Temporary until jvm method signature matching is better
     //  .single { it.jvmMethodSignature == constructorJvmSignature }
-    val parameters = protoConstructor
-        .valueParameterList
-        .mapIndexed { index, valueParameter ->
-          val paramName = nameResolver.getString(valueParameter.name)
+    val parameters: Map<String, ValueParameter> = protoConstructor.valueParameterList.associateBy {
+      nameResolver.getString(it.name)
+    }
 
-          val nullable = valueParameter.type.nullable
-          val paramFqcn = valueParameter.type.extractFullName()
-              .replace("`", "")
-              .removeSuffix("?")
+    val properties = classData.classProto.propertyList.associateBy {
+      nameResolver.getString(it.name)
+    }
 
-          val actualElement = constructor.parameters[index]
+    val propertyGenerators = mutableListOf<PropertyGenerator>()
+    for (enclosedElement in element.enclosedElements) {
+      if (enclosedElement !is VariableElement) continue
 
-          val serializedName = actualElement.getAnnotation(Json::class.java)?.name
-              ?: paramName
+      val name = enclosedElement.simpleName.toString()
+      val property = properties[name] ?: continue
+      val parameter = parameters[name]
 
-          val jsonQualifiers = AnnotationMirrors.getAnnotatedAnnotations(actualElement,
-              JsonQualifier::class.java)
+      val parameterElement = if (parameter != null) {
+        val parameterIndex = protoConstructor.valueParameterList.indexOf(parameter)
+        constructor.parameters[parameterIndex]
+      } else {
+        null
+      }
 
-          PropertyGenerator(
-              name = paramName,
-              serializedName = serializedName,
-              hasDefault = valueParameter.declaresDefaultValue,
-              nullable = nullable,
-              typeName = valueParameter.type.asTypeName(nameResolver, classProto::getTypeParameter),
-              unaliasedName = valueParameter.type.asTypeName(nameResolver,
-                  classProto::getTypeParameter, true),
-              jsonQualifiers = jsonQualifiers)
-        }
+      if (property.visibility != ProtoBuf.Visibility.INTERNAL
+          && property.visibility != ProtoBuf.Visibility.PROTECTED
+          && property.visibility != ProtoBuf.Visibility.PUBLIC) {
+        messager.printMessage(ERROR, "property $name is not visible", enclosedElement)
+        return null
+      }
+
+      propertyGenerators += PropertyGenerator(
+          name,
+          serializedName(name, enclosedElement, parameterElement),
+          parameter != null,
+          parameter?.declaresDefaultValue ?: true,
+          property.returnType.nullable,
+          property.returnType.asTypeName(nameResolver, classProto::getTypeParameter),
+          property.returnType.asTypeName(nameResolver, classProto::getTypeParameter, true),
+          jsonQualifiers(enclosedElement, parameterElement))
+    }
+
+    // Sort properties so that those with constructor parameters come first.
+    propertyGenerators.sortBy { if (it.hasConstructorParameter) -1 else 1 }
 
     val genericTypeNames = classProto.typeParameterList
         .map {
@@ -168,19 +189,56 @@ class JsonClassCodeGenProcessor : KotlinAbstractProcessor(), KotlinMetadataUtils
         }
 
     return AdapterGenerator(
-        fqClassName = fqClassName,
-        packageName = packageName,
-        propertyList = parameters,
+        className,
+        propertyList = propertyGenerators,
         originalElement = element,
         hasCompanionObject = hasCompanionObject,
         visibility = classProto.visibility!!,
         genericTypeNames = genericTypeNames,
-        elements = elementUtils)
+        elements = elementUtils,
+        isDataClass = classProto.isDataClass)
   }
 
-  private fun errorMustBeDataClass(element: Element) {
+  /** Returns the JsonQualifiers on the field and parameter of a property. */
+  private fun jsonQualifiers(
+    field: VariableElement,
+    parameter: VariableElement?
+  ): Set<AnnotationMirror> {
+    val fieldJsonQualifiers = AnnotationMirrors.getAnnotatedAnnotations(
+        field, JsonQualifier::class.java)
+
+    val parameterJsonQualifiers: Set<AnnotationMirror> = if (parameter != null) {
+      AnnotationMirrors.getAnnotatedAnnotations(parameter, JsonQualifier::class.java)
+    } else {
+      setOf()
+    }
+
+    // TODO(jwilson): union the qualifiers somehow?
+    if (fieldJsonQualifiers.isNotEmpty()) {
+      return fieldJsonQualifiers
+    } else {
+      return parameterJsonQualifiers
+    }
+  }
+
+  /** Returns the @Json name of a property, or `propertyName` if none is provided. */
+  private fun serializedName(
+    propertyName: String,
+    field: VariableElement,
+    parameter: VariableElement?
+  ): String {
+    val fieldAnnotation = field.getAnnotation(Json::class.java)
+    if (fieldAnnotation != null) return fieldAnnotation.name
+
+    val parameterAnnotation = parameter?.getAnnotation(Json::class.java)
+    if (parameterAnnotation != null) return parameterAnnotation.name
+
+    return propertyName
+  }
+
+  private fun errorMustBeKotlinClass(element: Element) {
     messager.printMessage(ERROR,
-        "@${JsonClass::class.java.simpleName} can't be applied to $element: must be a Kotlin data class",
+        "@${JsonClass::class.java.simpleName} can't be applied to $element: must be a Kotlin class",
         element)
   }
 

kotlin-codegen/compiler/src/main/java/com/squareup/moshi/PropertyGenerator.kt

@@ -32,6 +32,7 @@ import javax.lang.model.element.AnnotationMirror
 internal class PropertyGenerator(
   val name: String,
   val serializedName: String,
+  val hasConstructorParameter: Boolean,
   val hasDefault: Boolean,
   val nullable: Boolean,
   val typeName: TypeName,

kotlin-codegen/compiler/src/test/java/com/squareup/moshi/CompilerTest.kt

@@ -35,13 +35,11 @@ class CompilerTest {
         |import com.squareup.moshi.JsonClass
         |
         |@JsonClass(generateAdapter = true)
-        |class ConstructorParameters(var a: Int, var b: Int)
+        |class PrivateConstructorParameter(private var a: Int)
         |""".trimMargin())
 
     val result = call.execute()
     assertThat(result.exitCode).isEqualTo(ExitCode.COMPILATION_ERROR)
-    assertThat(result.systemErr).contains(
-        "@JsonClass can't be applied to ConstructorParameters: must be a Kotlin data class")
+    assertThat(result.systemErr).contains("property a is not visible")
   }
-
 }

kotlin-codegen/integration-test/src/test/kotlin/com/squareup/moshi/GeneratedAdaptersTest.kt

@@ -20,7 +20,7 @@ import org.assertj.core.api.Assertions.fail
 import org.intellij.lang.annotations.Language
 import org.junit.Test
 
-class DataClassesTest {
+class GeneratedAdaptersTest {
 
   private val moshi = Moshi.Builder().build()
 
@@ -252,6 +252,107 @@ class DataClassesTest {
 
   @JsonClass(generateAdapter = false)
   data class DoNotGenerateAdapter(val foo: String)
+
+  @Test fun constructorParameters() {
+    val moshi = Moshi.Builder().build()
+    val jsonAdapter = moshi.adapter(ConstructorParameters::class.java)
+
+    val encoded = ConstructorParameters(3, 5)
+    assertThat(jsonAdapter.toJson(encoded)).isEqualTo("""{"a":3,"b":5}""")
+
+    val decoded = jsonAdapter.fromJson("""{"a":4,"b":6}""")!!
+    assertThat(decoded.a).isEqualTo(4)
+    assertThat(decoded.b).isEqualTo(6)
+  }
+
+  @JsonClass(generateAdapter = true)
+  class ConstructorParameters(var a: Int, var b: Int)
+
+  @Test fun properties() {
+    val moshi = Moshi.Builder().build()
+    val jsonAdapter = moshi.adapter(Properties::class.java)
+
+    val encoded = Properties()
+    encoded.a = 3
+    encoded.b = 5
+    assertThat(jsonAdapter.toJson(encoded)).isEqualTo("""{"a":3,"b":5}""")
+
+    val decoded = jsonAdapter.fromJson("""{"a":3,"b":5}""")!!
+    assertThat(decoded.a).isEqualTo(3)
+    assertThat(decoded.b).isEqualTo(5)
+  }
+
+  @JsonClass(generateAdapter = true)
+  class Properties {
+    var a: Int = -1
+    var b: Int = -1
+  }
+
+  @Test fun constructorParametersAndProperties() {
+    val moshi = Moshi.Builder().build()
+    val jsonAdapter = moshi.adapter(ConstructorParametersAndProperties::class.java)
+
+    val encoded = ConstructorParametersAndProperties(3)
+    encoded.b = 5
+    assertThat(jsonAdapter.toJson(encoded)).isEqualTo("""{"a":3,"b":5}""")
+
+    val decoded = jsonAdapter.fromJson("""{"a":4,"b":6}""")!!
+    assertThat(decoded.a).isEqualTo(4)
+    assertThat(decoded.b).isEqualTo(6)
+  }
+
+  @JsonClass(generateAdapter = true)
+  class ConstructorParametersAndProperties(var a: Int) {
+    var b: Int = -1
+  }
+
+  @Test fun immutableConstructorParameters() {
+    val moshi = Moshi.Builder().build()
+    val jsonAdapter = moshi.adapter(ImmutableConstructorParameters::class.java)
+
+    val encoded = ImmutableConstructorParameters(3, 5)
+    assertThat(jsonAdapter.toJson(encoded)).isEqualTo("""{"a":3,"b":5}""")
+
+    val decoded = jsonAdapter.fromJson("""{"a":4,"b":6}""")!!
+    assertThat(decoded.a).isEqualTo(4)
+    assertThat(decoded.b).isEqualTo(6)
+  }
+
+  @JsonClass(generateAdapter = true)
+  class ImmutableConstructorParameters(val a: Int, val b: Int)
+
+  @Test fun immutableProperties() {
+    val moshi = Moshi.Builder().build()
+    val jsonAdapter = moshi.adapter(ImmutableProperties::class.java)
+
+    val encoded = ImmutableProperties(3, 5)
+    assertThat(jsonAdapter.toJson(encoded)).isEqualTo("""{"a":3,"b":5}""")
+
+    val decoded = jsonAdapter.fromJson("""{"a":3,"b":5}""")!!
+    assertThat(decoded.a).isEqualTo(3)
+    assertThat(decoded.b).isEqualTo(5)
+  }
+
+  @JsonClass(generateAdapter = true)
+  class ImmutableProperties(a: Int, b: Int) {
+    val a = a
+    val b = b
+  }
+
+  @Test fun constructorDefaults() {
+    val moshi = Moshi.Builder().build()
+    val jsonAdapter = moshi.adapter(ConstructorDefaultValues::class.java)
+
+    val encoded = ConstructorDefaultValues(3, 5)
+    assertThat(jsonAdapter.toJson(encoded)).isEqualTo("""{"a":3,"b":5}""")
+
+    val decoded = jsonAdapter.fromJson("""{"b":6}""")!!
+    assertThat(decoded.a).isEqualTo(-1)
+    assertThat(decoded.b).isEqualTo(6)
+  }
+
+  @JsonClass(generateAdapter = true)
+  class ConstructorDefaultValues(var a: Int = -1, var b: Int = -2)
 }
 
 // Has to be outside to avoid Types seeing an owning class

kotlin-codegen/integration-test/src/test/kotlin/com/squareup/moshi/KotlinCodeGenTest.kt

@@ -25,102 +25,6 @@ import java.util.SimpleTimeZone
 import kotlin.annotation.AnnotationRetention.RUNTIME
 
 class KotlinCodeGenTest {
-  @Ignore @Test fun constructorParameters() {
-    val moshi = Moshi.Builder().build()
-    val jsonAdapter = moshi.adapter(ConstructorParameters::class.java)
-
-    val encoded = ConstructorParameters(3, 5)
-    assertThat(jsonAdapter.toJson(encoded)).isEqualTo("""{"a":3,"b":5}""")
-
-    val decoded = jsonAdapter.fromJson("""{"a":4,"b":6}""")!!
-    assertThat(decoded.a).isEqualTo(4)
-    assertThat(decoded.b).isEqualTo(6)
-  }
-
-  class ConstructorParameters(var a: Int, var b: Int)
-
-  @Ignore @Test fun properties() {
-
-    val moshi = Moshi.Builder().build()
-    val jsonAdapter = moshi.adapter(Properties::class.java)
-
-    val encoded = Properties()
-    encoded.a = 3
-    encoded.b = 5
-    assertThat(jsonAdapter.toJson(encoded)).isEqualTo("""{"a":3,"b":5}""")
-
-    val decoded = jsonAdapter.fromJson("""{"a":3,"b":5}""")!!
-    assertThat(decoded.a).isEqualTo(3)
-    assertThat(decoded.b).isEqualTo(5)
-  }
-
-  class Properties {
-    var a: Int = -1
-    var b: Int = -1
-  }
-
-  @Ignore @Test fun constructorParametersAndProperties() {
-    val moshi = Moshi.Builder().build()
-    val jsonAdapter = moshi.adapter(ConstructorParametersAndProperties::class.java)
-
-    val encoded = ConstructorParametersAndProperties(3)
-    encoded.b = 5
-    assertThat(jsonAdapter.toJson(encoded)).isEqualTo("""{"a":3,"b":5}""")
-
-    val decoded = jsonAdapter.fromJson("""{"a":4,"b":6}""")!!
-    assertThat(decoded.a).isEqualTo(4)
-    assertThat(decoded.b).isEqualTo(6)
-  }
-
-  class ConstructorParametersAndProperties(var a: Int) {
-    var b: Int = -1
-  }
-
-  @Ignore @Test fun immutableConstructorParameters() {
-    val moshi = Moshi.Builder().build()
-    val jsonAdapter = moshi.adapter(ImmutableConstructorParameters::class.java)
-
-    val encoded = ImmutableConstructorParameters(3, 5)
-    assertThat(jsonAdapter.toJson(encoded)).isEqualTo("""{"a":3,"b":5}""")
-
-    val decoded = jsonAdapter.fromJson("""{"a":4,"b":6}""")!!
-    assertThat(decoded.a).isEqualTo(4)
-    assertThat(decoded.b).isEqualTo(6)
-  }
-
-  class ImmutableConstructorParameters(val a: Int, val b: Int)
-
-  @Ignore @Test fun immutableProperties() {
-    val moshi = Moshi.Builder().build()
-    val jsonAdapter = moshi.adapter(ImmutableProperties::class.java)
-
-    val encoded = ImmutableProperties(3, 5)
-    assertThat(jsonAdapter.toJson(encoded)).isEqualTo("""{"a":3,"b":5}""")
-
-    val decoded = jsonAdapter.fromJson("""{"a":3,"b":5}""")!!
-    assertThat(decoded.a).isEqualTo(3)
-    assertThat(decoded.b).isEqualTo(5)
-  }
-
-  class ImmutableProperties(a: Int, b: Int) {
-    val a = a
-    val b = b
-  }
-
-  @Ignore @Test fun constructorDefaults() {
-    val moshi = Moshi.Builder().build()
-    val jsonAdapter = moshi.adapter(ConstructorDefaultValues::class.java)
-
-    val encoded = ConstructorDefaultValues(3, 5)
-    assertThat(jsonAdapter.toJson(encoded)).isEqualTo("""{"a":3,"b":5}""")
-
-    val decoded = jsonAdapter.fromJson("""{"b":6}""")!!
-    assertThat(decoded.a).isEqualTo(-1)
-    assertThat(decoded.b).isEqualTo(6)
-  }
-
-  class ConstructorDefaultValues(var a: Int = -1, var b: Int = -2)
-
   @Ignore @Test fun requiredValueAbsent() {
     val moshi = Moshi.Builder().build()
     val jsonAdapter = moshi.adapter(RequiredValueAbsent::class.java)