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Merge pull request scalamacros#69 from xeno-by/master
initial unit tests for the converter
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35
tests/annotations-meta/src/test/scala/compile/Identity.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| import scala.{meta => m} | ||
| import scala.tools.cmd.CommandLineParser | ||
| import scala.tools.nsc.{Global, CompilerCommand, Settings} | ||
| import scala.tools.nsc.reporters.StoreReporter | ||
| import org.scalatest._ | ||
| import org.scalameta.paradise.converters.Converter | ||
|
|
||
| trait ConverterSuite extends FunSuite { | ||
| private lazy val g: Global = { | ||
| def fail(msg: String) = sys.error(s"ReflectToMeta initialization failed: $msg") | ||
| val classpath = System.getProperty("sbt.paths.testsConverter.test.classes") | ||
| val pluginpath = System.getProperty("sbt.paths.plugin.jar") | ||
| val options = "-cp " + classpath + " -Xplugin:" + pluginpath + ":" + classpath + " -Xplugin-require:macroparadise" | ||
| val args = CommandLineParser.tokenize(options) | ||
| val emptySettings = new Settings(error => fail(s"couldn't apply settings because $error")) | ||
| val reporter = new StoreReporter() | ||
| val command = new CompilerCommand(args, emptySettings) | ||
| val settings = command.settings | ||
| val g = new Global(settings, reporter) | ||
| val run = new g.Run | ||
| g.phase = run.parserPhase | ||
| g.globalPhase = run.parserPhase | ||
| g | ||
| } | ||
|
|
||
| def syntactic(code: String) { | ||
| test(code.trim) { | ||
| val parsedScalacTree: g.Tree = { | ||
| import g._ | ||
| val reporter = new StoreReporter() | ||
| g.reporter = reporter | ||
| val tree = gen.mkTreeOrBlock(newUnitParser(code, "<toolbox>").parseStatsOrPackages()) | ||
| val errors = reporter.infos.filter(_.severity == g.reporter.ERROR) | ||
| errors.foreach(error => fail(s"scalac parse error: ${error.msg} at ${error.pos}")) | ||
| tree | ||
| } | ||
|
|
||
| val parsedMetaTree: m.Stat = { | ||
| import scala.meta._ | ||
| code.parse[m.Stat] match { | ||
| case scala.meta.parsers.Parsed.Success(tree) => tree | ||
| case scala.meta.parsers.Parsed.Error(pos, message, _) => | ||
| fail(s"meta parse error: $pos at $message") | ||
| } | ||
| } | ||
| val convertedMetaTree: m.Stat = { | ||
| object converter extends Converter { | ||
| lazy val global: ConverterSuite.this.g.type = ConverterSuite.this.g | ||
| def apply(gtree: g.Tree): m.Stat = gtree.toMtree[m.Stat] | ||
| } | ||
| converter(parsedScalacTree) | ||
| } | ||
|
|
||
| // TODO: account for the fact that scala.reflect desugars stuff (e.g. for loops) even during parsing | ||
| // TODO: alternatively, we can just go ahead and undesugar for loops, because for syntactic APIs that's actually easy | ||
| if (parsedMetaTree.structure != convertedMetaTree.structure) { | ||
| fail( | ||
| s"scala -> meta converter error\nparsed tree:\n${parsedMetaTree.structure}\nconverted tree\n${convertedMetaTree.structure}") | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| class Syntactic extends ConverterSuite { | ||
| syntactic("case class C()") | ||
| syntactic("object M { override val toString = test5 }") | ||
| syntactic("foo(named = arg)") | ||
| syntactic(""" | ||
| 1 match { | ||
| case 0 | 1 => true | ||
| case (2 | 3 | 4 | 5) => false | ||
| } | ||
| """) | ||
| syntactic("def add(a: Int)(implicit z: Int = 0) = a.+(z)") | ||
| } |