Move the status file parser into its own package.

tools/testing/dart/expectation.dart

Index: tools/testing/dart/expectation.dart
diff --git a/tools/testing/dart/expectation.dart b/tools/testing/dart/expectation.dart
deleted file mode 100644
index 58cc0da466cd1fd736a09da18f4430d4b50a776d..0000000000000000000000000000000000000000
--- a/tools/testing/dart/expectation.dart
+++ /dev/null
@@ -1,211 +0,0 @@
-// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-/// The possible outcomes from running a test.
-class Expectation {
-  /// The test completed normally and did what it intended to do.
-  static final Expectation pass = new Expectation._('Pass');
-
-  /// The process aborted in a way that is not a potential runtime error coming
-  /// from the test itself. This is not considered a failure. It means an
-  /// error happened so fundamental that success/failure could not be
-  /// determined. Includes:
-  ///
-  /// * The Dart VM itself crashes, but not from an unhandled exception in user
-  ///   code.
-  ///
-  /// * When running dart2js on top of the VM to compile some code, the VM
-  ///   exits with a non-zero exit code or uncaught exception -- meaning an
-  ///   internal exception in dart2js itself.
-  ///
-  /// * The browser process crashes.
-  static final Expectation crash = new Expectation._('Crash');
-
-  /// The test did not complete (either successfully or unsuccessfully) in the
-  /// amount of time that the test runner gave it.
-  static final Expectation timeout = new Expectation._('Timeout');
-
-  /// The test completed but did not produce the intended output.
-  ///
-  /// This status is rarely used directly. Instead, most of the expectations
-  /// below refine this into more specific reasons *why* it failed.
-  static final Expectation fail = new Expectation._('Fail');
-
-  /// The test compiled and began executing but then threw an uncaught
-  /// exception or produced the wrong output.
-  static final Expectation runtimeError =
-      new Expectation._('RuntimeError', group: fail);
-
-  /// The test failed with an error at compile time and did not execute any
-  /// code.
-  ///
-  /// * For a VM test, means the VM exited with a "compile error" exit code 254.
-  /// * For an analyzer test, means the analyzer reported a static error.
-  /// * For a dart2js test, means dart2js reported a compile error.
-  static final Expectation compileTimeError =
-      new Expectation._('CompileTimeError', group: fail);
-
-  /// The test itself contains a comment with `@runtime-error` in it,
-  /// indicating it should have produced a runtime error when run. But when it
-  /// was run, the test completed without error.
-  static final Expectation missingRuntimeError =
-      new Expectation._('MissingRuntimeError', group: fail);
-
-  /// The test itself contains a comment with `@compile-error` in it,
-  /// indicating it should have produced an error when compiled. But when it
-  /// was compiled, no error was reported.
-  static final Expectation missingCompileTimeError =
-      new Expectation._('MissingCompileTimeError', group: fail);
-
-  /// When the test is processed by analyzer, a static warning should be
-  /// reported.
-  static final Expectation staticWarning =
-      new Expectation._('StaticWarning', group: fail);
-
-  /// The test itself contains a comment with `@static-warning` in it,
-  /// indicating analyzer should report a static warning when analyzing it, but
-  /// analysis did not produce any warnings.
-  static final Expectation missingStaticWarning =
-      new Expectation._('MissingStaticWarning', group: fail);
-
-  /// An invocation of "pub get" exited with a non-zero exit code.
-  // TODO(rnystrom): Is this still used? If not, remove.
-  static final Expectation pubGetError =
-      new Expectation._('PubGetError', group: fail);
-
-  /// The stdout or stderr produced by the test was not valid UTF-8 and could
-  /// not be decoded.
-  // TODO(rnystrom): The only test that uses this expectation is the one that
-  // tests that the test runner handles this expectation. Remove it?
-  static final Expectation nonUtf8Error =
-      new Expectation._('NonUtf8Output', group: fail);
-
-  /// The VM exited with the special exit code 252.
-  static final Expectation dartkCrash =
-      new Expectation._('DartkCrash', group: crash);
-
-  /// A timeout occurred in a test using the Kernel-based front end.
-  static final Expectation dartkTimeout =
-      new Expectation._('DartkTimeout', group: timeout);
-
-  /// A compile error was reported on a test compiled using the Kernel-based
-  /// front end.
-  static final Expectation dartkCompileTimeError =
-      new Expectation._('DartkCompileTimeError', group: compileTimeError);
-
-  // "meta expectations"
-  /// A marker applied to a test to indicate that the other non-pass
-  /// expectations are intentional and not a result of bugs or features that
-  /// have yet to be implemented.
-  ///
-  /// For example, a test marked "RuntimeError, Ok" means "This test is
-  /// *supposed* to fail at runtime."
-  // TODO(rnystrom): This is redundant with other mechanisms like
-  // `@runtime-error` and the markers in analyzer tests for stating where a
-  // static error should be reported. It leads to perpetually larger status
-  // files and means a reader of a test can't tell what the intended behavior
-  // actually is without knowing which status files mention it. Remove.
-  static final Expectation ok = new Expectation._('Ok', isMeta: true);
-
-  /// A marker that indicates the test takes longer to complete than most tests.
-  /// Tells the test runner to increase the timeout when running it.
-  static final Expectation slow = new Expectation._('Slow', isMeta: true);
-
-  /// Tells the test runner to not attempt to run the test.
-  ///
-  /// This means the test runner does not compare the test's actual results with
-  /// the expected results at all. This expectation should be avoided since it's
-  /// doesn't indicate *why* the test is being skipped and means we won't
-  /// notice if the actual behavior of the test changes.
-  static final Expectation skip = new Expectation._('Skip', isMeta: true);
-
-  /// Tells the test runner to skip the test because it takes too long to
-  /// complete.
-  ///
-  /// Prefer this over timeout since this avoids wasting CPU resources running
-  /// a test we know won't complete.
-  static final Expectation skipSlow =
-      new Expectation._('SkipSlow', isMeta: true, group: skip);
-
-  /// Skips this test because it is not intended to be meaningful for a certain
-  /// reason or on some configuration.
-  ///
-  /// For example, tests that use dart:io are SkipByDesign on the browser since
-  /// dart:io isn't supported there.
-  static final Expectation skipByDesign =
-      new Expectation._('SkipByDesign', isMeta: true);
-
-  /// Can be returned by the test runner to say the result should be ignored,
-  /// and assumed to meet the expectations, due to an infrastructure failure.
-  ///
-  /// This should not appear in status files.
-  static final Expectation ignore = new Expectation._('Ignore');
-
-  /// Used by pkg/front_end/lib/src/fasta/testing, but not used by test.dart.
-  /// Included here so that we can parse .status files that contain it.
-  static final Expectation verificationError =
-      new Expectation._('VerificationError');
-
-  /// Maps case-insensitive names to expectations.
-  static Map<String, Expectation> _all = new Map.fromIterable(<Expectation>[
-    pass,
-    crash,
-    timeout,
-    fail,
-    runtimeError,
-    compileTimeError,
-    missingRuntimeError,
-    missingCompileTimeError,
-    staticWarning,
-    missingStaticWarning,
-    pubGetError,
-    nonUtf8Error,
-    dartkCrash,
-    dartkTimeout,
-    dartkCompileTimeError,
-    ok,
-    slow,
-    skip,
-    skipSlow,
-    skipByDesign,
-    ignore,
-    verificationError,
-  ], key: (Expectation expectation) => expectation._name.toLowerCase());
-
-  /// Looks up the expectation with [name].
-  static Expectation find(String name) {
-    var expectation = _all[name.toLowerCase()];
-    if (expectation == null) {
-      throw new ArgumentError("Could not find an expectation named '$name'.");
-    }
-
-    return expectation;
-  }
-
-  final String _name;
-  final Expectation _group;
-
-  /// Whether this expectation is a test outcome. If not, it's a "meta marker".
-  final bool isOutcome;
-
-  Expectation._(this._name, {Expectation group, bool isMeta: false})
-      : _group = group,
-        isOutcome = !isMeta;
-
-  bool canBeOutcomeOf(Expectation expectation) {
-    var outcome = this;
-    if (outcome == ignore) return true;
-
-    while (outcome != null) {
-      if (outcome == expectation) {
-        return true;
-      }
-      outcome = outcome._group;
-    }
-
-    return false;
-  }
-
-  String toString() => _name;
-}