Refactored the cpython integration test

parser/src/test/scala/org/polystat/py2eo/parser/PyParserIT.scala

@@ -0,0 +1,80 @@
+package org.polystat.py2eo.parser
+
+import org.junit.jupiter.api.{AfterAll, Assertions, Test}
+
+import scala.concurrent.ExecutionContext.Implicits.global
+import scala.concurrent.duration.Duration
+import scala.concurrent.{Await, Future}
+import scala.reflect.io.{Directory, File}
+import scala.sys.process.Process
+import scala.util.Properties
+
+object PyParserIT {
+
+  /** Delete the directory by hand since Scala has some problems with it */
+  @AfterAll def cleanup(): Unit = this.directory.deleteRecursively
+
+  /** Temporary directory where to conduct tests */
+  private val directory = Directory.makeTemp(prefix = "org.polystat.py2eo.").toAbsolute
+
+  /** Repository with python tests */
+  private val repo = "https://github.com/python/cpython"
+
+  /** Blacklisted test names; do not update them */
+  private val blacklisted = Set(
+    // these are excluded because of some encoding problems in the lexer
+    "test_unicode_identifiers.py", "test_source_encoding.py",
+    "badsyntax_3131.py", "badsyntax_pep3120.py",
+    "module_koi8_r.py", "module_iso_8859_1.py",
+    // most of these are excluded because they do tests by comparing
+    // stack traces as strings but code before parser-printer has different
+    // line numbers than code after => traces are always different =>
+    // those tests cannot possibly pass
+    "test_traceback.py", "test_dis.py", "test_zipfile.py",
+    "test_multiprocessing_fork.py", "test_sys.py",
+    "test_import.yaml", "test_strtod.py", "test_trace.py",
+    "test_doctest.py", "test_concurrent_futures.py", "test_inspect.py",
+    "test_tracemalloc.py", "test_multiprocessing_spawn.py",
+    "test_sys_settrace.py", "test_multiprocessing_forkserver.py",
+    "test_compileall.py", "test_asyncio.py", "test_unittest.py",
+    "test_email.py", "test_tools.py", "test_atexit.py", "test_pdb.py",
+    "test_logging.py", "test_coroutines.py", "test_tasks.py",
+
+    "test_grammar.py", "test_headerregistry.py"
+  )
+}
+
+/** Parse and re-print tests from cpython repo and test them out */
+final class PyParserIT {
+  @Test def apply(): Unit = {
+    val cpython = Directory(PyParserIT.directory / "cpython")
+    Process(s"git clone --depth=1 --branch v3.8.10 ${PyParserIT.repo} $cpython").!!
+
+    val tests = Directory(cpython / "Lib" / "test")
+      .deepFiles
+      .toList
+      .filter(_.extension == "py")
+      .filter(_.name.startsWith("test"))
+      .filterNot(file => PyParserIT.blacklisted(file.name))
+      .map(reprint)
+
+    tests.foreach { Await.result(_, Duration.Inf) }
+    println(s"Total of ${tests.length} files transpiled")
+
+    assume(Properties.isMac || Properties.isLinux)
+    Process("./configure", cpython.jfile).!!
+    Process(s"make -j ${sys.runtime.availableProcessors}", cpython.jfile).!!
+    Process("make test", cpython.jfile).!!
+  }
+
+  /** Parses and reprints the given test and calls [[Assertions.fail]] if failed to parse it */
+  private def reprint(test: File): Future[Unit] = Future {
+    Parse(test).map(PrintPython.print).fold(this.fail(test))(test writeAll _)
+  }
+
+  /** Prints the failed test name and calls [[Assertions.fail]] */
+  private def fail(test: File): Unit = {
+    println(s"failed on ${test.name}")
+    Assertions.fail()
+  }
+}