Add mininal test suite to idl2k, remove deprecated ANTLRFileStream

libraries/tools/idl2k/build.gradle

@@ -20,6 +20,8 @@ dependencies {
     implementation "org.antlr:antlr4-runtime:$antlr4_version"
     implementation project(':kotlin-stdlib')
     implementation "org.jsoup:jsoup:1.8.2"
+
+    testImplementation "junit:junit:4.12"
 }
 
 sourceSets.main.kotlin.srcDirs += file("$buildDir/generated-src/antlr/main/")

libraries/tools/idl2k/src/main/kotlin/build.kt

@@ -1,14 +1,12 @@
 package org.jetbrains.idl2k
 
-import org.antlr.v4.runtime.ANTLRFileStream
-import kotlin.collections.HashSet
+import org.antlr.v4.runtime.CharStreams
 import java.io.File
 import java.io.IOException
 import java.net.URL
 import java.util.ArrayList
 import java.util.LinkedHashMap
 
-
 class BuildWebIdl(val mdnCacheFile: File, val srcDir: File) {
     val repositoryPre = loadPreliminaryRepository()
 
@@ -18,16 +16,17 @@ class BuildWebIdl(val mdnCacheFile: File, val srcDir: File) {
             System.exit(1)
         }
 
-        return srcDir.walkTopDown().filter { it.isDirectory || it.extension == "idl" }.asSequence().filter { it.isFile }.toList().sortedBy { it.absolutePath }.fold(Repository(emptyMap(), emptyMap(), emptyMap(), emptyMap())) { acc, e ->
+        return srcDir.walkTopDown().filter { it.isDirectory || it.extension == "idl" }.asSequence().filter { it.isFile }.toList()
+            .sortedBy { it.absolutePath }.fold(Repository(emptyMap(), emptyMap(), emptyMap(), emptyMap())) { acc, e ->
             System.err.flush()
             System.err.println("Parsing ${e.absolutePath}")
-            val fileRepository = parseIDL(ANTLRFileStream(e.absolutePath, "UTF-8"))
+            val fileRepository = parseIDL(CharStreams.fromFileName(e.absolutePath, Charsets.UTF_8))
 
             Repository(
-                    interfaces = acc.interfaces.mergeReduce(fileRepository.interfaces, ::merge),
-                    typeDefs = acc.typeDefs + fileRepository.typeDefs,
-                    externals = acc.externals.merge(fileRepository.externals),
-                    enums = acc.enums + fileRepository.enums
+                interfaces = acc.interfaces.mergeReduce(fileRepository.interfaces, ::merge),
+                typeDefs = acc.typeDefs + fileRepository.typeDefs,
+                externals = acc.externals.merge(fileRepository.externals),
+                enums = acc.enums + fileRepository.enums
             )
         }
     }
@@ -36,7 +35,8 @@ class BuildWebIdl(val mdnCacheFile: File, val srcDir: File) {
         println("Prepare...")
     }
 
-    val repository = repositoryPre.copy(typeDefs = repositoryPre.typeDefs.mapValues { it.value.copy(mapType(repositoryPre, it.value.types)) })
+    val repository =
+        repositoryPre.copy(typeDefs = repositoryPre.typeDefs.mapValues { it.value.copy(mapType(repositoryPre, it.value.types)) })
 
     val definitions = mapDefinitions(repository, repository.interfaces.values).map {
         if (it.name in relocations) {
@@ -91,9 +91,9 @@ class BuildWebIdl(val mdnCacheFile: File, val srcDir: File) {
 }
 
 
-internal fun <K, V> Map<K, List<V>>.reduceValues(reduce: (V, V) -> V = { a, b -> b }): Map<K, V> = mapValues { it.value.reduce(reduce) }
+internal fun <K, V> Map<K, List<V>>.reduceValues(reduce: (V, V) -> V = { _, b -> b }): Map<K, V> = mapValues { it.value.reduce(reduce) }
 
-internal fun <K, V> Map<K, V>.mergeReduce(other: Map<K, V>, reduce: (V, V) -> V = { a, b -> b }): Map<K, V> {
+internal fun <K, V> Map<K, V>.mergeReduce(other: Map<K, V>, reduce: (V, V) -> V = { _, b -> b }): Map<K, V> {
     val result = LinkedHashMap<K, V>(this.size + other.size)
     result.putAll(this)
     other.forEach { e ->
@@ -101,8 +101,7 @@ internal fun <K, V> Map<K, V>.mergeReduce(other: Map<K, V>, reduce: (V, V) -> V
 
         if (existing == null) {
             result[e.key] = e.value
-        }
-        else {
+        } else {
             result[e.key] = reduce(e.value, existing)
         }
     }
@@ -119,8 +118,7 @@ internal fun <K, V> Map<K, List<V>>.merge(other: Map<K, List<V>>): Map<K, List<V
         val list = result[it.key]
         if (list == null) {
             result[it.key] = ArrayList(it.value)
-        }
-        else {
+        } else {
             list.addAll(it.value)
         }
     }

libraries/tools/idl2k/src/main/kotlin/idl.kt

@@ -589,7 +589,7 @@ fun parseIDL(reader: CharStream): Repository {
             declarations.filterIsInstance<InterfaceDefinition>().filter { it.name.isEmpty().not() }.groupBy { it.name }.mapValues { it.value.reduce(::merge) },
             declarations.filterIsInstance<TypedefDefinition>().groupBy { it.name }.mapValues { it.value.first() },
             declarations.filterIsInstance<ExtensionInterfaceDefinition>().groupBy { it.name }.mapValues { it.value.map { it.implements } },
-            declarations.filterIsInstance<EnumDefinition>().groupBy { it.name }.mapValues { it.value.reduce { a, b -> a } }
+            declarations.filterIsInstance<EnumDefinition>().groupBy { it.name }.mapValues { it.value.reduce { a, _ -> a } }
     )
 }
 

libraries/tools/idl2k/src/test/kotlin/Idl2kTest.kt

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+
+import org.jetbrains.idl2k.BuildWebIdl
+import org.jetbrains.idl2k.render
+import org.junit.Assert.assertEquals
+import org.junit.Test
+import java.io.File
+import java.io.StringWriter
+import java.io.Writer
+
+
+class Idl2kTests {
+
+
+    private fun convertIdlToWriter(file: File): Writer {
+        val nonExistentCache = File.createTempFile("mdnCache", System.nanoTime().toString())
+        val buildWebIdl = BuildWebIdl(nonExistentCache, file)
+
+        val stringWriter = StringWriter()
+        stringWriter.render(
+            "",
+            buildWebIdl.definitions,
+            buildWebIdl.unions,
+            buildWebIdl.repository.enums.values.toList(),
+            buildWebIdl.mdnCache
+        )
+
+        nonExistentCache.delete()
+        return stringWriter
+    }
+
+    private fun assertIdlCompiledTo(fileName: String, expectedOutputName: String) {
+        val testResourcePrefix = "src/test/resources/"
+
+        assertEquals(
+            File(testResourcePrefix).resolve(expectedOutputName).readText(),
+            convertIdlToWriter(File(testResourcePrefix).resolve(fileName)).toString()
+        )
+    }
+
+    @Test
+    fun basicTest() {
+        assertIdlCompiledTo(
+            "SomethingNotInCache.idl",
+            "SomethingNotInCache.kt"
+        )
+    }
+}

libraries/tools/idl2k/src/test/resources/SomethingNotInCache.idl

@@ -0,0 +1,8 @@
+[Constructor]
+interface SomethingNotInCache {
+ DOMString someEmptyMethod ();
+ DOMString someMethod (SomethingUnknown root);
+ USVString? optionalUsvStringFetcher(USVString name);
+ readonly attribute WhateverUknownParam someReadOnlyParam;
+ attribute WhateverUknownParam someWriteableParam;
+};

libraries/tools/idl2k/src/test/resources/SomethingNotInCache.kt

@@ -0,0 +1,8 @@
+public external open class SomethingNotInCache {
+    open val someReadOnlyParam: dynamic
+    var someWriteableParam: dynamic
+    fun someEmptyMethod(): String
+    fun someMethod(root: dynamic): String
+    fun optionalUsvStringFetcher(name: String): String?
+}
+