From 5a49a95b399cbed956d808bdfe594e1a3f2c9382 Mon Sep 17 00:00:00 2001
From: Jens Johansen <jensj@google.com>
Date: Tue, 11 Jun 2024 12:36:05 +0000
Subject: [PATCH] [CFE] add --updateExpectations to coverage suite

So running `pkg/front_end/test/coverage_suite.dart --updateExpectations`
will update `pkg/front_end/test/coverage_suite_expected.dart` and a `git
diff` will give an overview of what changed.

Also save both number of hits and number of misses in the
"expect-file". If nothing else it will give some context
about what has changed.

Also cleanup json coverage output to be sorted and not
include "misses" that are also "hits" (the VM can give
this information).

Change-Id: I426681dde3d4d2ad0a9a7dfa474292c699223d68
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/370520
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Commit-Queue: Jens Johansen <jensj@google.com>
---
 pkg/front_end/test/coverage_helper.dart       |   8 +-
 pkg/front_end/test/coverage_suite.dart        | 383 ++-----
 .../test/coverage_suite_expected.dart         | 975 ++++++++++++++++++
 3 files changed, 1053 insertions(+), 313 deletions(-)
 create mode 100644 pkg/front_end/test/coverage_suite_expected.dart

diff --git a/pkg/front_end/test/coverage_helper.dart b/pkg/front_end/test/coverage_helper.dart
index bd08bfb8cfe..943bb7dea86 100644
--- a/pkg/front_end/test/coverage_helper.dart
+++ b/pkg/front_end/test/coverage_helper.dart
@@ -203,14 +203,16 @@ class FileCoverage {
 
   Map<String, Object?> toJson() {
     List<int> notCompiledRanges = [];
-    for (var pair in notCompiled) {
+    for (var pair in notCompiled.toList()
+      ..sort((a, b) => a.startPos.compareTo(b.startPos))) {
       notCompiledRanges.add(pair.startPos);
       notCompiledRanges.add(pair.endPos);
     }
+    misses.removeAll(hits);
     return {
       "uri": uri.toString(),
-      "hits": hits.toList(),
-      "misses": misses.toList(),
+      "hits": hits.toList()..sort(),
+      "misses": misses.toList()..sort(),
       "notCompiledRanges": notCompiledRanges,
     };
   }
diff --git a/pkg/front_end/test/coverage_suite.dart b/pkg/front_end/test/coverage_suite.dart
index c1d096d707f..d0413cb2cb0 100644
--- a/pkg/front_end/test/coverage_suite.dart
+++ b/pkg/front_end/test/coverage_suite.dart
@@ -11,296 +11,9 @@ import 'package:args/src/arg_results.dart';
 
 import '../tool/coverage_merger.dart' as coverageMerger;
 
-bool debug = false;
+part 'coverage_suite_expected.dart';
 
-// This is the state as of 8b8ec2aa3d91a7dc9e61bd7b9e576f82bf2b52c3,
-// using out/ReleaseX64/dart-sdk/bin/dart (which for instance makes a
-// difference for compute_platform_binaries_location.dart).
-const Map<String, double> _expect = {
-  "package:front_end/src/api_prototype/compiler_options.dart":
-      18.53448275862069,
-  "package:front_end/src/api_prototype/experimental_flags.dart":
-      81.08108108108108,
-  "package:front_end/src/api_prototype/experimental_flags_generated.dart":
-      53.605769230769226,
-  "package:front_end/src/api_prototype/file_system.dart": 33.33333333333333,
-  "package:front_end/src/api_prototype/incremental_kernel_generator.dart":
-      6.666666666666667,
-  "package:front_end/src/api_prototype/kernel_generator.dart": 0.0,
-  "package:front_end/src/api_prototype/language_version.dart": 0.0,
-  "package:front_end/src/api_prototype/lowering_predicates.dart":
-      3.6036036036036037,
-  "package:front_end/src/api_prototype/memory_file_system.dart": 25.0,
-  "package:front_end/src/api_prototype/standard_file_system.dart":
-      38.46153846153847,
-  "package:front_end/src/api_prototype/summary_generator.dart": 0.0,
-  "package:front_end/src/api_prototype/terminal_color_support.dart": 0.0,
-  "package:front_end/src/api_unstable/compiler_state.dart": 0.0,
-  "package:front_end/src/api_unstable/dart2js.dart": 0.0,
-  "package:front_end/src/api_unstable/util.dart": 37.03703703703704,
-  "package:front_end/src/base/instrumentation.dart": 100.0,
-  "package:front_end/src/base/processed_options.dart": 38.81578947368421,
-  "package:front_end/src/compute_platform_binaries_location.dart":
-      66.66666666666666,
-  "package:front_end/src/fasta/builder/builder.dart": 63.63636363636363,
-  "package:front_end/src/fasta/builder/builder_mixins.dart": 100.0,
-  "package:front_end/src/fasta/builder/builtin_type_declaration_builder.dart":
-      70.0,
-  "package:front_end/src/fasta/builder/class_builder.dart": 71.14427860696517,
-  "package:front_end/src/fasta/builder/constructor_reference_builder.dart":
-      100.0,
-  "package:front_end/src/fasta/builder/declaration_builder.dart": 100.0,
-  "package:front_end/src/fasta/builder/dynamic_type_declaration_builder.dart":
-      100.0,
-  "package:front_end/src/fasta/builder/extension_builder.dart": 50.0,
-  "package:front_end/src/fasta/builder/extension_type_declaration_builder.dart":
-      100.0,
-  "package:front_end/src/fasta/builder/fixed_type_builder.dart":
-      22.727272727272727,
-  "package:front_end/src/fasta/builder/formal_parameter_builder.dart":
-      95.85492227979275,
-  "package:front_end/src/fasta/builder/function_type_builder.dart":
-      77.95275590551181,
-  "package:front_end/src/fasta/builder/future_or_type_declaration_builder.dart":
-      0.0,
-  "package:front_end/src/fasta/builder/inferable_type_builder.dart": 100.0,
-  "package:front_end/src/fasta/builder/invalid_type_builder.dart":
-      33.33333333333333,
-  "package:front_end/src/fasta/builder/invalid_type_declaration_builder.dart":
-      85.0,
-  "package:front_end/src/fasta/builder/library_builder.dart": 81.63265306122449,
-  "package:front_end/src/fasta/builder/member_builder.dart": 96.75324675324676,
-  "package:front_end/src/fasta/builder/metadata_builder.dart":
-      86.04651162790698,
-  "package:front_end/src/fasta/builder/mixin_application_builder.dart": 100.0,
-  "package:front_end/src/fasta/builder/modifier_builder.dart":
-      76.47058823529412,
-  "package:front_end/src/fasta/builder/named_type_builder.dart":
-      74.74747474747475,
-  "package:front_end/src/fasta/builder/never_type_declaration_builder.dart":
-      76.92307692307693,
-  "package:front_end/src/fasta/builder/null_type_declaration_builder.dart":
-      33.33333333333333,
-  "package:front_end/src/fasta/builder/nullability_builder.dart": 100.0,
-  "package:front_end/src/fasta/builder/omitted_type_builder.dart":
-      34.146341463414636,
-  "package:front_end/src/fasta/builder/omitted_type_declaration_builder.dart":
-      0.0,
-  "package:front_end/src/fasta/builder/prefix_builder.dart": 89.1891891891892,
-  "package:front_end/src/fasta/builder/record_type_builder.dart":
-      77.43589743589745,
-  "package:front_end/src/fasta/builder/type_alias_builder.dart":
-      78.99159663865547,
-  "package:front_end/src/fasta/builder/type_builder.dart": 77.77777777777779,
-  "package:front_end/src/fasta/builder/type_declaration_builder.dart": 90.0,
-  "package:front_end/src/fasta/builder/type_variable_builder.dart":
-      78.42227378190255,
-  "package:front_end/src/fasta/builder/void_type_declaration_builder.dart":
-      100.0,
-  "package:front_end/src/fasta/builder_graph.dart": 54.71698113207547,
-  "package:front_end/src/fasta/codes/fasta_codes_cfe_generated.dart":
-      73.0892742453436,
-  "package:front_end/src/fasta/codes/type_labeler.dart": 82,
-  "package:front_end/src/fasta/combinator.dart": 100.0,
-  "package:front_end/src/fasta/command_line_reporting.dart": 68.68686868686868,
-  "package:front_end/src/fasta/compiler_context.dart": 90.1639344262295,
-  "package:front_end/src/fasta/configuration.dart": 100.0,
-  "package:front_end/src/fasta/crash.dart": 59.09090909090909,
-  "package:front_end/src/fasta/dill/dill_builder_mixins.dart": 100.0,
-  "package:front_end/src/fasta/dill/dill_class_builder.dart": 92.34972677595628,
-  "package:front_end/src/fasta/dill/dill_extension_builder.dart": 80,
-  "package:front_end/src/fasta/dill/dill_extension_member_builder.dart":
-      70.29702970297029,
-  "package:front_end/src/fasta/dill/dill_extension_type_declaration_builder.dart":
-      95.42483660130719,
-  "package:front_end/src/fasta/dill/dill_extension_type_member_builder.dart":
-      83.76623376623377,
-  "package:front_end/src/fasta/dill/dill_library_builder.dart": 77.0,
-  "package:front_end/src/fasta/dill/dill_loader.dart": 76.58536585365854,
-  "package:front_end/src/fasta/dill/dill_member_builder.dart":
-      86.52173913043478,
-  "package:front_end/src/fasta/dill/dill_target.dart": 74.35897435897436,
-  "package:front_end/src/fasta/dill/dill_type_alias_builder.dart":
-      95.83333333333334,
-  "package:front_end/src/fasta/export.dart": 72.22222222222221,
-  "package:front_end/src/fasta/hybrid_file_system.dart": 50.0,
-  "package:front_end/src/fasta/identifiers.dart": 84.78260869565217,
-  "package:front_end/src/fasta/ignored_parser_errors.dart": 100.0,
-  "package:front_end/src/fasta/import.dart": 100.0,
-  "package:front_end/src/fasta/import_chains.dart": 96.96969696969697,
-  "package:front_end/src/fasta/incremental_compiler.dart": 47.61111111111111,
-  "package:front_end/src/fasta/incremental_serializer.dart": 0.0,
-  "package:front_end/src/fasta/kernel/augmentation_lowering.dart": 100.0,
-  "package:front_end/src/fasta/kernel/benchmarker.dart": 0.0,
-  "package:front_end/src/fasta/kernel/body_builder.dart": 90.95321558581637,
-  "package:front_end/src/fasta/kernel/body_builder_context.dart":
-      68.31501831501832,
-  "package:front_end/src/fasta/kernel/collections.dart": 36.44736842105264,
-  "package:front_end/src/fasta/kernel/combined_member_signature.dart":
-      91.29411764705883,
-  "package:front_end/src/fasta/kernel/const_conditional_simplifier.dart": 50.0,
-  "package:front_end/src/fasta/kernel/constant_collection_builders.dart":
-      64.92307692307693,
-  "package:front_end/src/fasta/kernel/constant_evaluator.dart":
-      78.68572647749093,
-  "package:front_end/src/fasta/kernel/constant_int_folder.dart":
-      92.04545454545455,
-  "package:front_end/src/fasta/kernel/constructor_tearoff_lowering.dart":
-      95.11278195488721,
-  "package:front_end/src/fasta/kernel/exhaustiveness.dart": 74.57098283931357,
-  "package:front_end/src/fasta/kernel/expression_generator.dart":
-      79.69046114971573,
-  "package:front_end/src/fasta/kernel/expression_generator_helper.dart": 100.0,
-  "package:front_end/src/fasta/kernel/forest.dart": 90.27777777777779,
-  "package:front_end/src/fasta/kernel/forwarding_node.dart": 94.4927536231884,
-  "package:front_end/src/fasta/kernel/hierarchy/class_member.dart":
-      83.1896551724138,
-  "package:front_end/src/fasta/kernel/hierarchy/delayed.dart": 100.0,
-  "package:front_end/src/fasta/kernel/hierarchy/extension_type_members.dart":
-      87.52834467120182,
-  "package:front_end/src/fasta/kernel/hierarchy/hierarchy_builder.dart":
-      50.256410256410255,
-  "package:front_end/src/fasta/kernel/hierarchy/hierarchy_node.dart":
-      93.33333333333333,
-  "package:front_end/src/fasta/kernel/hierarchy/members_builder.dart":
-      98.51851851851852,
-  "package:front_end/src/fasta/kernel/hierarchy/members_node.dart":
-      91.44427001569859,
-  "package:front_end/src/fasta/kernel/hierarchy/mixin_inferrer.dart":
-      61.53846153846154,
-  "package:front_end/src/fasta/kernel/implicit_field_type.dart":
-      52.24719101123596,
-  "package:front_end/src/fasta/kernel/implicit_type_argument.dart":
-      2.941176470588235,
-  "package:front_end/src/fasta/kernel/internal_ast.dart": 46.40625,
-  "package:front_end/src/fasta/kernel/invalid_type.dart": 74.13793103448276,
-  "package:front_end/src/fasta/kernel/kernel_constants.dart": 45.45454545454545,
-  "package:front_end/src/fasta/kernel/kernel_helper.dart": 98.95833333333334,
-  "package:front_end/src/fasta/kernel/kernel_target.dart": 78,
-  "package:front_end/src/fasta/kernel/kernel_variable_builder.dart":
-      61.111111111111114,
-  "package:front_end/src/fasta/kernel/late_lowering.dart": 100.0,
-  "package:front_end/src/fasta/kernel/load_library_builder.dart":
-      87.17948717948718,
-  "package:front_end/src/fasta/kernel/macro/annotation_parser.dart":
-      0.1984126984126984,
-  "package:front_end/src/fasta/kernel/macro/identifiers.dart": 0.0,
-  "package:front_end/src/fasta/kernel/macro/introspectors.dart": 0.0,
-  "package:front_end/src/fasta/kernel/macro/macro.dart": 0.22675736961451248,
-  "package:front_end/src/fasta/kernel/macro/offsets.dart": 0.0,
-  "package:front_end/src/fasta/kernel/macro/types.dart": 0.0,
-  "package:front_end/src/fasta/kernel/member_covariance.dart":
-      89.23611111111111,
-  "package:front_end/src/fasta/kernel/resource_identifier.dart":
-      39.473684210526315,
-  "package:front_end/src/fasta/kernel/static_weak_references.dart":
-      15.238095238095239,
-  "package:front_end/src/fasta/kernel/try_constant_evaluator.dart":
-      19.753086419753085,
-  "package:front_end/src/fasta/kernel/type_algorithms.dart": 93.96728016359918,
-  "package:front_end/src/fasta/kernel/type_builder_computer.dart":
-      90.20618556701031,
-  "package:front_end/src/fasta/kernel/utils.dart": 37.93103448275862,
-  "package:front_end/src/fasta/kernel/verifier.dart": 56.25,
-  "package:front_end/src/fasta/library_graph.dart": 79.3103448275862,
-  "package:front_end/src/fasta/messages.dart": 30.0,
-  "package:front_end/src/fasta/modifier.dart": 100.0,
-  "package:front_end/src/fasta/operator.dart": 100.0,
-  "package:front_end/src/fasta/problems.dart": 0.0,
-  "package:front_end/src/fasta/scope.dart": 79.22606924643586,
-  "package:front_end/src/fasta/source/class_declaration.dart":
-      80.29556650246306,
-  "package:front_end/src/fasta/source/diet_listener.dart": 89.18539325842697,
-  "package:front_end/src/fasta/source/diet_parser.dart": 100.0,
-  "package:front_end/src/fasta/source/name_scheme.dart": 93.19148936170212,
-  "package:front_end/src/fasta/source/offset_map.dart": 95.16129032258065,
-  "package:front_end/src/fasta/source/outline_builder.dart": 91.37159137159138,
-  "package:front_end/src/fasta/source/redirecting_factory_body.dart":
-      94.44444444444444,
-  "package:front_end/src/fasta/source/source_builder_mixins.dart":
-      88.8268156424581,
-  "package:front_end/src/fasta/source/source_class_builder.dart":
-      85.51136363636364,
-  "package:front_end/src/fasta/source/source_constructor_builder.dart":
-      92.65658747300216,
-  "package:front_end/src/fasta/source/source_enum_builder.dart":
-      95.73560767590618,
-  "package:front_end/src/fasta/source/source_extension_builder.dart":
-      61.261261261261254,
-  "package:front_end/src/fasta/source/source_extension_type_declaration_builder.dart":
-      84.0,
-  "package:front_end/src/fasta/source/source_factory_builder.dart":
-      92.22222222222223,
-  "package:front_end/src/fasta/source/source_field_builder.dart": 89,
-  "package:front_end/src/fasta/source/source_function_builder.dart":
-      89.29663608562691,
-  "package:front_end/src/fasta/source/source_library_builder.dart":
-      83.27291558777836,
-  "package:front_end/src/fasta/source/source_loader.dart": 79.344409519533,
-  "package:front_end/src/fasta/source/source_member_builder.dart":
-      40.32258064516129,
-  "package:front_end/src/fasta/source/source_procedure_builder.dart":
-      96.11829944547135,
-  "package:front_end/src/fasta/source/source_type_alias_builder.dart":
-      97.63313609467455,
-  "package:front_end/src/fasta/source/stack_listener_impl.dart":
-      64.44444444444444,
-  "package:front_end/src/fasta/ticker.dart": 73.07692307692307,
-  "package:front_end/src/fasta/type_inference/closure_context.dart":
-      84.23236514522821,
-  "package:front_end/src/fasta/type_inference/delayed_expressions.dart":
-      77.55474452554745,
-  "package:front_end/src/fasta/type_inference/external_ast_helper.dart":
-      97.88732394366197,
-  "package:front_end/src/fasta/type_inference/factor_type.dart":
-      76.19047619047619,
-  "package:front_end/src/fasta/type_inference/for_in.dart": 75.47169811320755,
-  "package:front_end/src/fasta/type_inference/inference_results.dart":
-      85.12820512820512,
-  "package:front_end/src/fasta/type_inference/inference_visitor.dart":
-      90.17588521175654,
-  "package:front_end/src/fasta/type_inference/inference_visitor_base.dart":
-      84.20487106017191,
-  "package:front_end/src/fasta/type_inference/matching_cache.dart":
-      80.26509572901325,
-  "package:front_end/src/fasta/type_inference/matching_expressions.dart":
-      98.10964083175804,
-  "package:front_end/src/fasta/type_inference/object_access_target.dart":
-      77.19298245614034,
-  "package:front_end/src/fasta/type_inference/shared_type_analyzer.dart": 98.0,
-  "package:front_end/src/fasta/type_inference/standard_bounds.dart":
-      71.42857142857143,
-  "package:front_end/src/fasta/type_inference/type_constraint_gatherer.dart":
-      59,
-  "package:front_end/src/fasta/type_inference/type_demotion.dart":
-      77.77777777777779,
-  "package:front_end/src/fasta/type_inference/type_inference_engine.dart":
-      88.06509945750453,
-  "package:front_end/src/fasta/type_inference/type_inferrer.dart":
-      51.17647058823529,
-  "package:front_end/src/fasta/type_inference/type_schema.dart":
-      36.666666666666664,
-  "package:front_end/src/fasta/type_inference/type_schema_elimination.dart":
-      88.88888888888889,
-  "package:front_end/src/fasta/type_inference/type_schema_environment.dart":
-      79.50530035335689,
-  "package:front_end/src/fasta/uri_offset.dart": 100.0,
-  "package:front_end/src/fasta/uri_translator.dart": 75.92592592592592,
-  "package:front_end/src/fasta/uris.dart": 100.0,
-  "package:front_end/src/fasta/util/error_reporter_file_copier.dart": 0.0,
-  "package:front_end/src/fasta/util/experiment_environment_getter.dart":
-      85.71428571428571,
-  "package:front_end/src/fasta/util/helpers.dart": 52.63157894736842,
-  "package:front_end/src/fasta/util/parser_ast.dart": 5.567451820128479,
-  "package:front_end/src/fasta/util/parser_ast_helper.dart": 20.424013434089,
-  "package:front_end/src/fasta/util/textual_outline.dart": 86.54205607476636,
-  "package:front_end/src/kernel_generator_impl.dart": 28.645833333333332,
-  "package:front_end/src/macros/isolate_macro_serializer.dart": 0.0,
-  "package:front_end/src/macros/macro_serializer.dart": 0.0,
-  "package:front_end/src/macros/macro_target.dart": 0.0,
-  "package:front_end/src/macros/macro_target_io.dart": 0.0,
-  "package:front_end/src/macros/temp_dir_macro_serializer.dart": 0.0,
-};
+bool debug = false;
 
 Future<void> main([List<String> arguments = const <String>[]]) async {
   Directory coverageTmpDir =
@@ -336,6 +49,7 @@ Future<void> _run(Directory coverageTmpDir, List<String> arguments) async {
     print("Starting shard ${i + 1} of ${options.numberOfWorkers}");
     futures.add(Process.run(Platform.resolvedExecutable, [
       "--enable-asserts",
+      "--deterministic",
       "pkg/front_end/test/fasta/strong_suite.dart",
       "-DskipVm=true",
       "--shards=${options.numberOfWorkers}",
@@ -388,6 +102,20 @@ Future<void> _run(Directory coverageTmpDir, List<String> arguments) async {
     }
   }
 
+  StringBuffer updatedExpectations = new StringBuffer();
+  updatedExpectations.write("""
+// Copyright (c) 2024, 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.
+
+part of "coverage_suite.dart";
+
+// This is the currently recorded state
+// using out/ReleaseX64/dart-sdk/bin/dart (which for instance makes a
+// difference for compute_platform_binaries_location.dart).
+const Map<String, ({int hitCount, int missCount})> _expect = {
+""");
+
   for (MapEntry<Uri, coverageMerger.CoverageInfo> coverageEntry
       in coverageData.entries) {
     if (coverageEntry.value.error) {
@@ -398,33 +126,61 @@ Future<void> _run(Directory coverageTmpDir, List<String> arguments) async {
       int hitCount = coverageEntry.value.hitCount;
       int missCount = coverageEntry.value.missCount;
       double percent = (hitCount / (hitCount + missCount) * 100);
-      if (debug) {
-        print("\"${coverageEntry.key}\": $percent,");
+      if (options.updateExpectations) {
+        updatedExpectations.writeln("  // $percent%.");
+        updatedExpectations.writeln("  \"${coverageEntry.key}\": "
+            "(hitCount: $hitCount, missCount: $missCount,),");
+        continue;
       }
-      int requireAtLeast =
-          (_expect[coverageEntry.key.toString()] ?? 0.0).floor();
-      bool pass = percent >= requireAtLeast;
-      if (!pass) {
-        sb.write("${coverageEntry.value.visualization}");
-        sb.write("\n\nExpected at least $requireAtLeast%, got $percent% "
-            "($hitCount hits and $missCount misses).");
-        sb.write("\n\nTo re-run this test, run:");
-        var extraFlags = _assertsEnabled ? ' --enable-asserts' : '';
-        // It looks like coverage results vary slightly based on the number of
-        // tasks, so include a `--tasks=` argument in the repro instructions.
-        //
-        // TODO(paulberry): why do coverage results vary based on the number of
-        // tasks? (Note: possibly due to
-        // https://github.com/dart-lang/sdk/issues/42061)
-        sb.write(
-            "\n\n   dart$extraFlags pkg/front_end/test/coverage_suite.dart "
-            "--tasks=${options.numberOfWorkers}");
+      bool pass = true;
+      ({int hitCount, int missCount})? expected =
+          _expect[coverageEntry.key.toString()];
+      if (expected != null) {
+        // TODO(jensj): Should we warn if hitCount goes down?
+        // Or be ok with it if both hitCount and missCount goes up?
+        // Or something else?
+        double expectedPercent = (expected.hitCount /
+            (expected.hitCount + expected.missCount) *
+            100);
+        int requireAtLeast = expectedPercent.floor();
+        pass = percent >= requireAtLeast;
+        if (!pass) {
+          sb.write("${coverageEntry.value.visualization}");
+          sb.write("\n\nExpected at least $requireAtLeast%, got $percent% "
+              "($hitCount hits (expected: ${expected.hitCount}) and "
+              "$missCount misses (expected: ${expected.missCount})).");
+          sb.write("\n\nTo re-run this test, run:");
+          var extraFlags = _assertsEnabled ? ' --enable-asserts' : '';
+          // It looks like coverage results vary slightly based on the number of
+          // tasks, so include a `--tasks=` argument in the repro instructions.
+          //
+          // TODO(paulberry): why do coverage results vary based on the number
+          // of tasks? (Note: possibly due to
+          // https://github.com/dart-lang/sdk/issues/42061)
+          sb.write(
+              "\n\n   dart$extraFlags pkg/front_end/test/coverage_suite.dart "
+              "--tasks=${options.numberOfWorkers}");
+          sb.write("\n\n   Or update the expectations directly via");
+          sb.write(
+              "\n\n   dart$extraFlags pkg/front_end/test/coverage_suite.dart "
+              "--tasks=${options.numberOfWorkers} --updateExpectations");
+        }
       }
       addResult(coverageEntry.key.toString(), pass,
           log: sb.isEmpty ? null : sb.toString());
     }
   }
 
+  updatedExpectations.writeln("};");
+  if (options.updateExpectations) {
+    File f = new File.fromUri(
+        Uri.base.resolve("pkg/front_end/test/coverage_suite_expected.dart"));
+    f.writeAsStringSync(updatedExpectations.toString());
+    ProcessResult formatResult =
+        Process.runSync(Platform.resolvedExecutable, ["format", f.path]);
+    print("Formatting exit-code: ${formatResult.exitCode}");
+  }
+
   // Write results.json and logs.json.
   Uri resultJsonUri = options.outputDirectory.resolve("results.json");
   Uri logsJsonUri = options.outputDirectory.resolve("logs.json");
@@ -460,6 +216,7 @@ class Options {
   final String? configurationName;
   final bool verbose;
   final bool debug;
+  final bool updateExpectations;
   final Uri outputDirectory;
   final int numberOfWorkers;
 
@@ -467,6 +224,7 @@ class Options {
     this.configurationName,
     this.verbose,
     this.debug,
+    this.updateExpectations,
     this.outputDirectory, {
     required this.numberOfWorkers,
   });
@@ -485,6 +243,8 @@ class Options {
           abbr: "j",
           help: "The number of parallel tasks to run.",
           defaultsTo: "${getDefaultThreads()}")
+      ..addFlag("updateExpectations",
+          help: "update expectations", defaultsTo: false)
       // These are not used but are here for compatibility with the test system.
       ..addOption("shards", help: "(Ignored) Number of shards", defaultsTo: "1")
       ..addOption("shard",
@@ -501,6 +261,7 @@ class Options {
     if (tasks == null || tasks < 1) {
       throw "--tasks (-j) has to be an integer >= 1";
     }
+    bool updateExpectations = parsedOptions["updateExpectations"];
 
     if (verbose) {
       print("NOTE: Created with options\n  "
@@ -508,13 +269,15 @@ class Options {
           "verbose = ${verbose},\n  "
           "debug = ${debug},\n  "
           "${outputDirectory},\n  "
-          "numberOfWorkers: ${tasks}");
+          "numberOfWorkers: ${tasks},\n  "
+          "updateExpectations = ${updateExpectations}");
     }
 
     return Options(
       parsedOptions["named-configuration"],
       verbose,
       debug,
+      updateExpectations,
       outputDirectory,
       numberOfWorkers: tasks,
     );
diff --git a/pkg/front_end/test/coverage_suite_expected.dart b/pkg/front_end/test/coverage_suite_expected.dart
new file mode 100644
index 00000000000..d08925d5ea4
--- /dev/null
+++ b/pkg/front_end/test/coverage_suite_expected.dart
@@ -0,0 +1,975 @@
+// Copyright (c) 2024, 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.
+
+part of "coverage_suite.dart";
+
+// This is the currently recorded state
+// using out/ReleaseX64/dart-sdk/bin/dart (which for instance makes a
+// difference for compute_platform_binaries_location.dart).
+const Map<String, ({int hitCount, int missCount})> _expect = {
+  // 18.53448275862069%.
+  "package:front_end/src/api_prototype/compiler_options.dart": (
+    hitCount: 43,
+    missCount: 189,
+  ),
+  // 86.48648648648648%.
+  "package:front_end/src/api_prototype/experimental_flags.dart": (
+    hitCount: 64,
+    missCount: 10,
+  ),
+  // 55.28846153846154%.
+  "package:front_end/src/api_prototype/experimental_flags_generated.dart": (
+    hitCount: 230,
+    missCount: 186,
+  ),
+  // 33.33333333333333%.
+  "package:front_end/src/api_prototype/file_system.dart": (
+    hitCount: 2,
+    missCount: 4,
+  ),
+  // 6.666666666666667%.
+  "package:front_end/src/api_prototype/incremental_kernel_generator.dart": (
+    hitCount: 1,
+    missCount: 14,
+  ),
+  // 0.0%.
+  "package:front_end/src/api_prototype/kernel_generator.dart": (
+    hitCount: 0,
+    missCount: 18,
+  ),
+  // 0.0%.
+  "package:front_end/src/api_prototype/language_version.dart": (
+    hitCount: 0,
+    missCount: 67,
+  ),
+  // 3.6036036036036037%.
+  "package:front_end/src/api_prototype/lowering_predicates.dart": (
+    hitCount: 12,
+    missCount: 321,
+  ),
+  // 25.0%.
+  "package:front_end/src/api_prototype/memory_file_system.dart": (
+    hitCount: 23,
+    missCount: 69,
+  ),
+  // 38.46153846153847%.
+  "package:front_end/src/api_prototype/standard_file_system.dart": (
+    hitCount: 40,
+    missCount: 64,
+  ),
+  // 0.0%.
+  "package:front_end/src/api_prototype/summary_generator.dart": (
+    hitCount: 0,
+    missCount: 4,
+  ),
+  // 0.0%.
+  "package:front_end/src/api_prototype/terminal_color_support.dart": (
+    hitCount: 0,
+    missCount: 6,
+  ),
+  // 0.0%.
+  "package:front_end/src/api_unstable/compiler_state.dart": (
+    hitCount: 0,
+    missCount: 12,
+  ),
+  // 0.0%.
+  "package:front_end/src/api_unstable/dart2js.dart": (
+    hitCount: 0,
+    missCount: 74,
+  ),
+  // 37.03703703703704%.
+  "package:front_end/src/api_unstable/util.dart": (
+    hitCount: 10,
+    missCount: 17,
+  ),
+  // 100.0%.
+  "package:front_end/src/base/instrumentation.dart": (
+    hitCount: 29,
+    missCount: 0,
+  ),
+  // 39.86486486486486%.
+  "package:front_end/src/base/processed_options.dart": (
+    hitCount: 236,
+    missCount: 356,
+  ),
+  // 71.23287671232876%.
+  "package:front_end/src/compute_platform_binaries_location.dart": (
+    hitCount: 52,
+    missCount: 21,
+  ),
+  // 0.0%.
+  "package:front_end/src/fasta/builder/augmentation_iterator.dart": (
+    hitCount: 0,
+    missCount: 17,
+  ),
+  // 64.44444444444444%.
+  "package:front_end/src/fasta/builder/builder.dart": (
+    hitCount: 29,
+    missCount: 16,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/builder/builder_mixins.dart": (
+    hitCount: 42,
+    missCount: 0,
+  ),
+  // 70.0%.
+  "package:front_end/src/fasta/builder/builtin_type_declaration_builder.dart": (
+    hitCount: 7,
+    missCount: 3,
+  ),
+  // 71.14427860696517%.
+  "package:front_end/src/fasta/builder/class_builder.dart": (
+    hitCount: 143,
+    missCount: 58,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/builder/constructor_reference_builder.dart": (
+    hitCount: 52,
+    missCount: 0,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/builder/declaration_builder.dart": (
+    hitCount: 25,
+    missCount: 0,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/builder/dynamic_type_declaration_builder.dart": (
+    hitCount: 2,
+    missCount: 0,
+  ),
+  // 50.0%.
+  "package:front_end/src/fasta/builder/extension_builder.dart": (
+    hitCount: 4,
+    missCount: 4,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/builder/extension_type_declaration_builder.dart":
+      (
+    hitCount: 17,
+    missCount: 0,
+  ),
+  // 22.727272727272727%.
+  "package:front_end/src/fasta/builder/fixed_type_builder.dart": (
+    hitCount: 5,
+    missCount: 17,
+  ),
+  // 95.85492227979275%.
+  "package:front_end/src/fasta/builder/formal_parameter_builder.dart": (
+    hitCount: 185,
+    missCount: 8,
+  ),
+  // 77.95275590551181%.
+  "package:front_end/src/fasta/builder/function_type_builder.dart": (
+    hitCount: 99,
+    missCount: 28,
+  ),
+  // 0.0%.
+  "package:front_end/src/fasta/builder/future_or_type_declaration_builder.dart":
+      (
+    hitCount: 0,
+    missCount: 10,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/builder/inferable_type_builder.dart": (
+    hitCount: 27,
+    missCount: 0,
+  ),
+  // 33.33333333333333%.
+  "package:front_end/src/fasta/builder/invalid_type_builder.dart": (
+    hitCount: 4,
+    missCount: 8,
+  ),
+  // 85.0%.
+  "package:front_end/src/fasta/builder/invalid_type_declaration_builder.dart": (
+    hitCount: 17,
+    missCount: 3,
+  ),
+  // 81.63265306122449%.
+  "package:front_end/src/fasta/builder/library_builder.dart": (
+    hitCount: 80,
+    missCount: 18,
+  ),
+  // 97.38562091503267%.
+  "package:front_end/src/fasta/builder/member_builder.dart": (
+    hitCount: 149,
+    missCount: 4,
+  ),
+  // 86.04651162790698%.
+  "package:front_end/src/fasta/builder/metadata_builder.dart": (
+    hitCount: 37,
+    missCount: 6,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/builder/mixin_application_builder.dart": (
+    hitCount: 1,
+    missCount: 0,
+  ),
+  // 85.0%.
+  "package:front_end/src/fasta/builder/modifier_builder.dart": (
+    hitCount: 17,
+    missCount: 3,
+  ),
+  // 74.74747474747475%.
+  "package:front_end/src/fasta/builder/named_type_builder.dart": (
+    hitCount: 370,
+    missCount: 125,
+  ),
+  // 76.92307692307693%.
+  "package:front_end/src/fasta/builder/never_type_declaration_builder.dart": (
+    hitCount: 10,
+    missCount: 3,
+  ),
+  // 33.33333333333333%.
+  "package:front_end/src/fasta/builder/null_type_declaration_builder.dart": (
+    hitCount: 2,
+    missCount: 4,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/builder/nullability_builder.dart": (
+    hitCount: 24,
+    missCount: 0,
+  ),
+  // 34.146341463414636%.
+  "package:front_end/src/fasta/builder/omitted_type_builder.dart": (
+    hitCount: 28,
+    missCount: 54,
+  ),
+  // 0.0%.
+  "package:front_end/src/fasta/builder/omitted_type_declaration_builder.dart": (
+    hitCount: 0,
+    missCount: 13,
+  ),
+  // 89.47368421052632%.
+  "package:front_end/src/fasta/builder/prefix_builder.dart": (
+    hitCount: 34,
+    missCount: 4,
+  ),
+  // 77.43589743589745%.
+  "package:front_end/src/fasta/builder/record_type_builder.dart": (
+    hitCount: 151,
+    missCount: 44,
+  ),
+  // 78.99159663865547%.
+  "package:front_end/src/fasta/builder/type_alias_builder.dart": (
+    hitCount: 188,
+    missCount: 50,
+  ),
+  // 77.77777777777779%.
+  "package:front_end/src/fasta/builder/type_builder.dart": (
+    hitCount: 56,
+    missCount: 16,
+  ),
+  // 90.0%.
+  "package:front_end/src/fasta/builder/type_declaration_builder.dart": (
+    hitCount: 9,
+    missCount: 1,
+  ),
+  // 78.42227378190255%.
+  "package:front_end/src/fasta/builder/type_variable_builder.dart": (
+    hitCount: 338,
+    missCount: 93,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/builder/void_type_declaration_builder.dart": (
+    hitCount: 2,
+    missCount: 0,
+  ),
+  // 54.71698113207547%.
+  "package:front_end/src/fasta/builder_graph.dart": (
+    hitCount: 29,
+    missCount: 24,
+  ),
+  // 73.0892742453436%.
+  "package:front_end/src/fasta/codes/fasta_codes_cfe_generated.dart": (
+    hitCount: 1138,
+    missCount: 419,
+  ),
+  // 82.92682926829268%.
+  "package:front_end/src/fasta/codes/type_labeler.dart": (
+    hitCount: 510,
+    missCount: 105,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/combinator.dart": (
+    hitCount: 9,
+    missCount: 0,
+  ),
+  // 68.68686868686868%.
+  "package:front_end/src/fasta/command_line_reporting.dart": (
+    hitCount: 68,
+    missCount: 31,
+  ),
+  // 90.1639344262295%.
+  "package:front_end/src/fasta/compiler_context.dart": (
+    hitCount: 55,
+    missCount: 6,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/configuration.dart": (
+    hitCount: 1,
+    missCount: 0,
+  ),
+  // 59.09090909090909%.
+  "package:front_end/src/fasta/crash.dart": (
+    hitCount: 52,
+    missCount: 36,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/dill/dill_builder_mixins.dart": (
+    hitCount: 16,
+    missCount: 0,
+  ),
+  // 92.34972677595628%.
+  "package:front_end/src/fasta/dill/dill_class_builder.dart": (
+    hitCount: 169,
+    missCount: 14,
+  ),
+  // 80.72289156626506%.
+  "package:front_end/src/fasta/dill/dill_extension_builder.dart": (
+    hitCount: 67,
+    missCount: 16,
+  ),
+  // 70.29702970297029%.
+  "package:front_end/src/fasta/dill/dill_extension_member_builder.dart": (
+    hitCount: 71,
+    missCount: 30,
+  ),
+  // 95.42483660130719%.
+  "package:front_end/src/fasta/dill/dill_extension_type_declaration_builder.dart":
+      (
+    hitCount: 146,
+    missCount: 7,
+  ),
+  // 83.76623376623377%.
+  "package:front_end/src/fasta/dill/dill_extension_type_member_builder.dart": (
+    hitCount: 129,
+    missCount: 25,
+  ),
+  // 78.4256559766764%.
+  "package:front_end/src/fasta/dill/dill_library_builder.dart": (
+    hitCount: 269,
+    missCount: 74,
+  ),
+  // 76.58536585365854%.
+  "package:front_end/src/fasta/dill/dill_loader.dart": (
+    hitCount: 157,
+    missCount: 48,
+  ),
+  // 86.52173913043478%.
+  "package:front_end/src/fasta/dill/dill_member_builder.dart": (
+    hitCount: 199,
+    missCount: 31,
+  ),
+  // 74.35897435897436%.
+  "package:front_end/src/fasta/dill/dill_target.dart": (
+    hitCount: 29,
+    missCount: 10,
+  ),
+  // 95.83333333333334%.
+  "package:front_end/src/fasta/dill/dill_type_alias_builder.dart": (
+    hitCount: 46,
+    missCount: 2,
+  ),
+  // 86.66666666666667%.
+  "package:front_end/src/fasta/export.dart": (
+    hitCount: 13,
+    missCount: 2,
+  ),
+  // 50.0%.
+  "package:front_end/src/fasta/hybrid_file_system.dart": (
+    hitCount: 21,
+    missCount: 21,
+  ),
+  // 84.78260869565217%.
+  "package:front_end/src/fasta/identifiers.dart": (
+    hitCount: 78,
+    missCount: 14,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/ignored_parser_errors.dart": (
+    hitCount: 3,
+    missCount: 0,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/import.dart": (
+    hitCount: 46,
+    missCount: 0,
+  ),
+  // 96.96969696969697%.
+  "package:front_end/src/fasta/import_chains.dart": (
+    hitCount: 96,
+    missCount: 3,
+  ),
+  // 48.225352112676056%.
+  "package:front_end/src/fasta/incremental_compiler.dart": (
+    hitCount: 856,
+    missCount: 919,
+  ),
+  // 0.0%.
+  "package:front_end/src/fasta/incremental_serializer.dart": (
+    hitCount: 0,
+    missCount: 202,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/kernel/augmentation_lowering.dart": (
+    hitCount: 4,
+    missCount: 0,
+  ),
+  // 0.0%.
+  "package:front_end/src/fasta/kernel/benchmarker.dart": (
+    hitCount: 0,
+    missCount: 128,
+  ),
+  // 91.35454423412538%.
+  "package:front_end/src/fasta/kernel/body_builder.dart": (
+    hitCount: 6805,
+    missCount: 644,
+  ),
+  // 70.40816326530613%.
+  "package:front_end/src/fasta/kernel/body_builder_context.dart": (
+    hitCount: 345,
+    missCount: 145,
+  ),
+  // 36.44736842105264%.
+  "package:front_end/src/fasta/kernel/collections.dart": (
+    hitCount: 277,
+    missCount: 483,
+  ),
+  // 91.8854415274463%.
+  "package:front_end/src/fasta/kernel/combined_member_signature.dart": (
+    hitCount: 385,
+    missCount: 34,
+  ),
+  // 61.68831168831169%.
+  "package:front_end/src/fasta/kernel/const_conditional_simplifier.dart": (
+    hitCount: 95,
+    missCount: 59,
+  ),
+  // 67.65676567656766%.
+  "package:front_end/src/fasta/kernel/constant_collection_builders.dart": (
+    hitCount: 205,
+    missCount: 98,
+  ),
+  // 82.14686728048507%.
+  "package:front_end/src/fasta/kernel/constant_evaluator.dart": (
+    hitCount: 3658,
+    missCount: 795,
+  ),
+  // 92.04545454545455%.
+  "package:front_end/src/fasta/kernel/constant_int_folder.dart": (
+    hitCount: 243,
+    missCount: 21,
+  ),
+  // 95.11278195488721%.
+  "package:front_end/src/fasta/kernel/constructor_tearoff_lowering.dart": (
+    hitCount: 253,
+    missCount: 13,
+  ),
+  // 74.57098283931357%.
+  "package:front_end/src/fasta/kernel/exhaustiveness.dart": (
+    hitCount: 478,
+    missCount: 163,
+  ),
+  // 79.56411876184461%.
+  "package:front_end/src/fasta/kernel/expression_generator.dart": (
+    hitCount: 2519,
+    missCount: 647,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/kernel/expression_generator_helper.dart": (
+    hitCount: 36,
+    missCount: 0,
+  ),
+  // 90.27777777777779%.
+  "package:front_end/src/fasta/kernel/forest.dart": (
+    hitCount: 390,
+    missCount: 42,
+  ),
+  // 94.4927536231884%.
+  "package:front_end/src/fasta/kernel/forwarding_node.dart": (
+    hitCount: 326,
+    missCount: 19,
+  ),
+  // 83.1896551724138%.
+  "package:front_end/src/fasta/kernel/hierarchy/class_member.dart": (
+    hitCount: 386,
+    missCount: 78,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/kernel/hierarchy/delayed.dart": (
+    hitCount: 218,
+    missCount: 0,
+  ),
+  // 87.52834467120182%.
+  "package:front_end/src/fasta/kernel/hierarchy/extension_type_members.dart": (
+    hitCount: 386,
+    missCount: 55,
+  ),
+  // 50.77720207253886%.
+  "package:front_end/src/fasta/kernel/hierarchy/hierarchy_builder.dart": (
+    hitCount: 98,
+    missCount: 95,
+  ),
+  // 93.33333333333333%.
+  "package:front_end/src/fasta/kernel/hierarchy/hierarchy_node.dart": (
+    hitCount: 392,
+    missCount: 28,
+  ),
+  // 98.51851851851852%.
+  "package:front_end/src/fasta/kernel/hierarchy/members_builder.dart": (
+    hitCount: 133,
+    missCount: 2,
+  ),
+  // 91.44427001569859%.
+  "package:front_end/src/fasta/kernel/hierarchy/members_node.dart": (
+    hitCount: 1165,
+    missCount: 109,
+  ),
+  // 61.53846153846154%.
+  "package:front_end/src/fasta/kernel/hierarchy/mixin_inferrer.dart": (
+    hitCount: 248,
+    missCount: 155,
+  ),
+  // 52.24719101123596%.
+  "package:front_end/src/fasta/kernel/implicit_field_type.dart": (
+    hitCount: 93,
+    missCount: 85,
+  ),
+  // 2.941176470588235%.
+  "package:front_end/src/fasta/kernel/implicit_type_argument.dart": (
+    hitCount: 1,
+    missCount: 33,
+  ),
+  // 46.40625%.
+  "package:front_end/src/fasta/kernel/internal_ast.dart": (
+    hitCount: 594,
+    missCount: 686,
+  ),
+  // 74.13793103448276%.
+  "package:front_end/src/fasta/kernel/invalid_type.dart": (
+    hitCount: 43,
+    missCount: 15,
+  ),
+  // 55.55555555555556%.
+  "package:front_end/src/fasta/kernel/kernel_constants.dart": (
+    hitCount: 10,
+    missCount: 8,
+  ),
+  // 98.95833333333334%.
+  "package:front_end/src/fasta/kernel/kernel_helper.dart": (
+    hitCount: 285,
+    missCount: 3,
+  ),
+  // 79.9079754601227%.
+  "package:front_end/src/fasta/kernel/kernel_target.dart": (
+    hitCount: 1042,
+    missCount: 262,
+  ),
+  // 61.111111111111114%.
+  "package:front_end/src/fasta/kernel/kernel_variable_builder.dart": (
+    hitCount: 11,
+    missCount: 7,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/kernel/late_lowering.dart": (
+    hitCount: 368,
+    missCount: 0,
+  ),
+  // 89.58333333333334%.
+  "package:front_end/src/fasta/kernel/load_library_builder.dart": (
+    hitCount: 43,
+    missCount: 5,
+  ),
+  // 0.1984126984126984%.
+  "package:front_end/src/fasta/kernel/macro/annotation_parser.dart": (
+    hitCount: 2,
+    missCount: 1006,
+  ),
+  // 0.0%.
+  "package:front_end/src/fasta/kernel/macro/identifiers.dart": (
+    hitCount: 0,
+    missCount: 134,
+  ),
+  // 0.0%.
+  "package:front_end/src/fasta/kernel/macro/introspectors.dart": (
+    hitCount: 0,
+    missCount: 573,
+  ),
+  // 0.19047619047619047%.
+  "package:front_end/src/fasta/kernel/macro/macro.dart": (
+    hitCount: 2,
+    missCount: 1048,
+  ),
+  // 0.0%.
+  "package:front_end/src/fasta/kernel/macro/offsets.dart": (
+    hitCount: 0,
+    missCount: 201,
+  ),
+  // 0.0%.
+  "package:front_end/src/fasta/kernel/macro/types.dart": (
+    hitCount: 0,
+    missCount: 230,
+  ),
+  // 89.23611111111111%.
+  "package:front_end/src/fasta/kernel/member_covariance.dart": (
+    hitCount: 257,
+    missCount: 31,
+  ),
+  // 39.473684210526315%.
+  "package:front_end/src/fasta/kernel/resource_identifier.dart": (
+    hitCount: 15,
+    missCount: 23,
+  ),
+  // 15.238095238095239%.
+  "package:front_end/src/fasta/kernel/static_weak_references.dart": (
+    hitCount: 16,
+    missCount: 89,
+  ),
+  // 19.753086419753085%.
+  "package:front_end/src/fasta/kernel/try_constant_evaluator.dart": (
+    hitCount: 16,
+    missCount: 65,
+  ),
+  // 93.14928425357874%.
+  "package:front_end/src/fasta/kernel/type_algorithms.dart": (
+    hitCount: 911,
+    missCount: 67,
+  ),
+  // 90.20618556701031%.
+  "package:front_end/src/fasta/kernel/type_builder_computer.dart": (
+    hitCount: 175,
+    missCount: 19,
+  ),
+  // 37.93103448275862%.
+  "package:front_end/src/fasta/kernel/utils.dart": (
+    hitCount: 66,
+    missCount: 108,
+  ),
+  // 56.25%.
+  "package:front_end/src/fasta/kernel/verifier.dart": (
+    hitCount: 18,
+    missCount: 14,
+  ),
+  // 79.3103448275862%.
+  "package:front_end/src/fasta/library_graph.dart": (
+    hitCount: 23,
+    missCount: 6,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/messages.dart": (
+    hitCount: 12,
+    missCount: 0,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/modifier.dart": (
+    hitCount: 29,
+    missCount: 0,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/operator.dart": (
+    hitCount: 4,
+    missCount: 0,
+  ),
+  // 0.0%.
+  "package:front_end/src/fasta/problems.dart": (
+    hitCount: 0,
+    missCount: 29,
+  ),
+  // 80.5050505050505%.
+  "package:front_end/src/fasta/scope.dart": (
+    hitCount: 797,
+    missCount: 193,
+  ),
+  // 80.29556650246306%.
+  "package:front_end/src/fasta/source/class_declaration.dart": (
+    hitCount: 163,
+    missCount: 40,
+  ),
+  // 92.02898550724638%.
+  "package:front_end/src/fasta/source/diet_listener.dart": (
+    hitCount: 635,
+    missCount: 55,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/source/diet_parser.dart": (
+    hitCount: 4,
+    missCount: 0,
+  ),
+  // 93.19148936170212%.
+  "package:front_end/src/fasta/source/name_scheme.dart": (
+    hitCount: 219,
+    missCount: 16,
+  ),
+  // 95.16129032258065%.
+  "package:front_end/src/fasta/source/offset_map.dart": (
+    hitCount: 118,
+    missCount: 6,
+  ),
+  // 91.45299145299145%.
+  "package:front_end/src/fasta/source/outline_builder.dart": (
+    hitCount: 2247,
+    missCount: 210,
+  ),
+  // 94.44444444444444%.
+  "package:front_end/src/fasta/source/redirecting_factory_body.dart": (
+    hitCount: 34,
+    missCount: 2,
+  ),
+  // 88.8268156424581%.
+  "package:front_end/src/fasta/source/source_builder_mixins.dart": (
+    hitCount: 159,
+    missCount: 20,
+  ),
+  // 85.39007092198581%.
+  "package:front_end/src/fasta/source/source_class_builder.dart": (
+    hitCount: 1204,
+    missCount: 206,
+  ),
+  // 92.65658747300216%.
+  "package:front_end/src/fasta/source/source_constructor_builder.dart": (
+    hitCount: 858,
+    missCount: 68,
+  ),
+  // 95.73560767590618%.
+  "package:front_end/src/fasta/source/source_enum_builder.dart": (
+    hitCount: 449,
+    missCount: 20,
+  ),
+  // 61.261261261261254%.
+  "package:front_end/src/fasta/source/source_extension_builder.dart": (
+    hitCount: 68,
+    missCount: 43,
+  ),
+  // 84.32539682539682%.
+  "package:front_end/src/fasta/source/source_extension_type_declaration_builder.dart":
+      (
+    hitCount: 425,
+    missCount: 79,
+  ),
+  // 92.22222222222223%.
+  "package:front_end/src/fasta/source/source_factory_builder.dart": (
+    hitCount: 581,
+    missCount: 49,
+  ),
+  // 89.10891089108911%.
+  "package:front_end/src/fasta/source/source_field_builder.dart": (
+    hitCount: 1170,
+    missCount: 143,
+  ),
+  // 89.29663608562691%.
+  "package:front_end/src/fasta/source/source_function_builder.dart": (
+    hitCount: 292,
+    missCount: 35,
+  ),
+  // 83.62422997946611%.
+  "package:front_end/src/fasta/source/source_library_builder.dart": (
+    hitCount: 3258,
+    missCount: 638,
+  ),
+  // 80.1697186243859%.
+  "package:front_end/src/fasta/source/source_loader.dart": (
+    hitCount: 1795,
+    missCount: 444,
+  ),
+  // 40.32258064516129%.
+  "package:front_end/src/fasta/source/source_member_builder.dart": (
+    hitCount: 25,
+    missCount: 37,
+  ),
+  // 96.11829944547135%.
+  "package:front_end/src/fasta/source/source_procedure_builder.dart": (
+    hitCount: 520,
+    missCount: 21,
+  ),
+  // 97.63313609467455%.
+  "package:front_end/src/fasta/source/source_type_alias_builder.dart": (
+    hitCount: 330,
+    missCount: 8,
+  ),
+  // 78.37837837837837%.
+  "package:front_end/src/fasta/source/stack_listener_impl.dart": (
+    hitCount: 29,
+    missCount: 8,
+  ),
+  // 73.07692307692307%.
+  "package:front_end/src/fasta/ticker.dart": (
+    hitCount: 19,
+    missCount: 7,
+  ),
+  // 85.65400843881856%.
+  "package:front_end/src/fasta/type_inference/closure_context.dart": (
+    hitCount: 406,
+    missCount: 68,
+  ),
+  // 77.55474452554745%.
+  "package:front_end/src/fasta/type_inference/delayed_expressions.dart": (
+    hitCount: 425,
+    missCount: 123,
+  ),
+  // 97.88732394366197%.
+  "package:front_end/src/fasta/type_inference/external_ast_helper.dart": (
+    hitCount: 139,
+    missCount: 3,
+  ),
+  // 76.19047619047619%.
+  "package:front_end/src/fasta/type_inference/factor_type.dart": (
+    hitCount: 16,
+    missCount: 5,
+  ),
+  // 75.47169811320755%.
+  "package:front_end/src/fasta/type_inference/for_in.dart": (
+    hitCount: 120,
+    missCount: 39,
+  ),
+  // 85.12820512820512%.
+  "package:front_end/src/fasta/type_inference/inference_results.dart": (
+    hitCount: 166,
+    missCount: 29,
+  ),
+  // 90.25658807212206%.
+  "package:front_end/src/fasta/type_inference/inference_visitor.dart": (
+    hitCount: 7809,
+    missCount: 843,
+  ),
+  // 84.56303724928367%.
+  "package:front_end/src/fasta/type_inference/inference_visitor_base.dart": (
+    hitCount: 2361,
+    missCount: 431,
+  ),
+  // 80.26509572901325%.
+  "package:front_end/src/fasta/type_inference/matching_cache.dart": (
+    hitCount: 545,
+    missCount: 134,
+  ),
+  // 98.10964083175804%.
+  "package:front_end/src/fasta/type_inference/matching_expressions.dart": (
+    hitCount: 519,
+    missCount: 10,
+  ),
+  // 77.31629392971246%.
+  "package:front_end/src/fasta/type_inference/object_access_target.dart": (
+    hitCount: 484,
+    missCount: 142,
+  ),
+  // 98.0%.
+  "package:front_end/src/fasta/type_inference/shared_type_analyzer.dart": (
+    hitCount: 98,
+    missCount: 2,
+  ),
+  // 71.42857142857143%.
+  "package:front_end/src/fasta/type_inference/standard_bounds.dart": (
+    hitCount: 20,
+    missCount: 8,
+  ),
+  // 61.28608923884514%.
+  "package:front_end/src/fasta/type_inference/type_constraint_gatherer.dart": (
+    hitCount: 467,
+    missCount: 295,
+  ),
+  // 95.0%.
+  "package:front_end/src/fasta/type_inference/type_demotion.dart": (
+    hitCount: 19,
+    missCount: 1,
+  ),
+  // 89.62962962962962%.
+  "package:front_end/src/fasta/type_inference/type_inference_engine.dart": (
+    hitCount: 484,
+    missCount: 56,
+  ),
+  // 54.037267080745345%.
+  "package:front_end/src/fasta/type_inference/type_inferrer.dart": (
+    hitCount: 87,
+    missCount: 74,
+  ),
+  // 36.666666666666664%.
+  "package:front_end/src/fasta/type_inference/type_schema.dart": (
+    hitCount: 11,
+    missCount: 19,
+  ),
+  // 88.88888888888889%.
+  "package:front_end/src/fasta/type_inference/type_schema_elimination.dart": (
+    hitCount: 32,
+    missCount: 4,
+  ),
+  // 89.06882591093117%.
+  "package:front_end/src/fasta/type_inference/type_schema_environment.dart": (
+    hitCount: 220,
+    missCount: 27,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/uri_offset.dart": (
+    hitCount: 1,
+    missCount: 0,
+  ),
+  // 75.92592592592592%.
+  "package:front_end/src/fasta/uri_translator.dart": (
+    hitCount: 41,
+    missCount: 13,
+  ),
+  // 100.0%.
+  "package:front_end/src/fasta/uris.dart": (
+    hitCount: 4,
+    missCount: 0,
+  ),
+  // 0.0%.
+  "package:front_end/src/fasta/util/error_reporter_file_copier.dart": (
+    hitCount: 0,
+    missCount: 11,
+  ),
+  // 85.71428571428571%.
+  "package:front_end/src/fasta/util/experiment_environment_getter.dart": (
+    hitCount: 6,
+    missCount: 1,
+  ),
+  // 52.63157894736842%.
+  "package:front_end/src/fasta/util/helpers.dart": (
+    hitCount: 20,
+    missCount: 18,
+  ),
+  // 5.5954088952654235%.
+  "package:front_end/src/fasta/util/parser_ast.dart": (
+    hitCount: 78,
+    missCount: 1316,
+  ),
+  // 20.424013434089%.
+  "package:front_end/src/fasta/util/parser_ast_helper.dart": (
+    hitCount: 973,
+    missCount: 3791,
+  ),
+  // 86.54205607476636%.
+  "package:front_end/src/fasta/util/textual_outline.dart": (
+    hitCount: 463,
+    missCount: 72,
+  ),
+  // 28.79581151832461%.
+  "package:front_end/src/kernel_generator_impl.dart": (
+    hitCount: 55,
+    missCount: 136,
+  ),
+  // 0.0%.
+  "package:front_end/src/macros/isolate_macro_serializer.dart": (
+    hitCount: 0,
+    missCount: 15,
+  ),
+  // 0.0%.
+  "package:front_end/src/macros/macro_serializer.dart": (
+    hitCount: 0,
+    missCount: 4,
+  ),
+  // 0.0%.
+  "package:front_end/src/macros/macro_target.dart": (
+    hitCount: 0,
+    missCount: 3,
+  ),
+  // 0.0%.
+  "package:front_end/src/macros/macro_target_io.dart": (
+    hitCount: 0,
+    missCount: 42,
+  ),
+  // 0.0%.
+  "package:front_end/src/macros/temp_dir_macro_serializer.dart": (
+    hitCount: 0,
+    missCount: 18,
+  ),
+};