Update to KotlinPoet 1.4.2 (#972)

* Unwrap typealiases

This was a change in 1.4.2 left over from moshi's prior metadata logic. We need the unwrapped type for class references

* Add toe-hold for testing shared adapter behavior

* Add regression test for abstractSuperProperties

* Kotlinpoet 1.4.2

kotlin/codegen/src/main/java/com/squareup/moshi/kotlin/codegen/metadata.kt

@@ -18,6 +18,7 @@ package com.squareup.moshi.kotlin.codegen
 import com.squareup.kotlinpoet.AnnotationSpec
 import com.squareup.kotlinpoet.ClassName
 import com.squareup.kotlinpoet.KModifier
+import com.squareup.kotlinpoet.TypeName
 import com.squareup.kotlinpoet.TypeSpec
 import com.squareup.kotlinpoet.asClassName
 import com.squareup.kotlinpoet.asTypeName
@@ -30,8 +31,10 @@ import com.squareup.kotlinpoet.metadata.isInner
 import com.squareup.kotlinpoet.metadata.isLocal
 import com.squareup.kotlinpoet.metadata.isSealed
 import com.squareup.kotlinpoet.metadata.specs.ClassInspector
+import com.squareup.kotlinpoet.metadata.specs.TypeNameAliasTag
 import com.squareup.kotlinpoet.metadata.specs.toTypeSpec
 import com.squareup.kotlinpoet.metadata.toImmutableKmClass
+import com.squareup.kotlinpoet.tag
 import com.squareup.moshi.Json
 import com.squareup.moshi.JsonQualifier
 import com.squareup.moshi.kotlin.codegen.api.DelegateKey
@@ -207,7 +210,8 @@ private fun declaredProperties(
 ): Map<String, TargetProperty> {
 
   val result = mutableMapOf<String, TargetProperty>()
-  for (property in kotlinApi.propertySpecs) {
+  for (initialProperty in kotlinApi.propertySpecs) {
+    val property = initialProperty.toBuilder(type = initialProperty.type.unwrapTypeAlias()).build()
     val name = property.name
     val parameter = constructor.parameters[name]
     result[name] = TargetProperty(
@@ -308,3 +312,7 @@ private fun List<AnnotationSpec>?.jsonName(): String? {
 private fun String.escapeDollarSigns(): String {
   return replace("\$", "\${\'\$\'}")
 }
+
+private fun TypeName.unwrapTypeAlias(): TypeName {
+  return tag<TypeNameAliasTag>()?.type ?: this
+}

kotlin/codegen/src/test/java/com/squareup/moshi/kotlin/codegen/JsonClassCodegenProcessorTest.kt

@@ -15,10 +15,10 @@
  */
 package com.squareup.moshi.kotlin.codegen
 
+import com.squareup.kotlinpoet.metadata.KotlinPoetMetadataPreview
 import com.tschuchort.compiletesting.KotlinCompilation
 import com.tschuchort.compiletesting.SourceFile
 import com.tschuchort.compiletesting.SourceFile.Companion.kotlin
-import com.squareup.kotlinpoet.metadata.KotlinPoetMetadataPreview
 import org.assertj.core.api.Assertions.assertThat
 import org.junit.Ignore
 import org.junit.Rule
@@ -350,6 +350,30 @@ class JsonClassCodegenProcessorTest {
     assertThat(result.messages).contains("JsonQualifier @UpperCase must have RUNTIME retention")
   }
 
+  @Ignore("Toe-hold test for when " +
+      "https://github.com/tschuchortdev/kotlin-compile-testing/issues/28 is resolved.")
+  @Test
+  fun `TypeAliases with the same backing type should share the same adapter`() {
+    val result = compile(kotlin("source.kt",
+        """
+          import com.squareup.moshi.JsonClass
+          
+          typealias FirstName = String
+          typealias LastName = String
+
+          @JsonClass(generateAdapter = true)
+          data class Person(val firstName: FirstName, val lastName: LastName, val hairColor: String)
+          """
+    ))
+    assertThat(result.exitCode).isEqualTo(KotlinCompilation.ExitCode.OK)
+    val adapterSource = result.generatedFiles.find { it.name == "PersonJsonAdapter.kt" }!!
+
+    //language=kotlin
+    assertThat(adapterSource.readText()).isEqualTo("""
+      // TODO implement this
+    """.trimIndent())
+  }
+
   private fun prepareCompilation(vararg sourceFiles: SourceFile): KotlinCompilation {
     return KotlinCompilation()
         .apply {