initial support for running tests against dart analyzer in strong mode (#27033)

tools/testing/dart/compiler_configuration.dart

@@ -34,6 +34,7 @@ Uri nativeDirectoryToUri(String nativePath) {
 abstract class CompilerConfiguration {
   final bool isDebug;
   final bool isChecked;
+  final bool isStrong;
   final bool isHostChecked;
   final bool useSdk;
 
@@ -48,6 +49,7 @@ abstract class CompilerConfiguration {
     // object.
     bool isDebug = configuration['mode'] == 'debug';
     bool isChecked = configuration['checked'];
+    bool isStrong = configuration['strong'];
     bool isHostChecked = configuration['host_checked'];
     bool useSdk = configuration['use_sdk'];
     bool isCsp = configuration['csp'];
@@ -61,6 +63,7 @@ abstract class CompilerConfiguration {
         return new AnalyzerCompilerConfiguration(
             isDebug: isDebug,
             isChecked: isChecked,
+            isStrong: isStrong,
             isHostChecked: isHostChecked,
             useSdk: useSdk);
       case 'dart2js':
@@ -102,6 +105,7 @@ abstract class CompilerConfiguration {
   CompilerConfiguration._subclass(
       {this.isDebug: false,
       this.isChecked: false,
+      this.isStrong: false,
       this.isHostChecked: false,
       this.useSdk: false});
 
@@ -604,10 +608,12 @@ class Dart2AppJitSnapshotCompilerConfiguration extends Dart2AppSnapshotCompilerC
 
 class AnalyzerCompilerConfiguration extends CompilerConfiguration {
   AnalyzerCompilerConfiguration(
-      {bool isDebug, bool isChecked, bool isHostChecked, bool useSdk})
+      {bool isDebug, bool isChecked, bool isStrong, bool isHostChecked, bool
+      useSdk})
       : super._subclass(
             isDebug: isDebug,
             isChecked: isChecked,
+            isStrong: isStrong,
             isHostChecked: isHostChecked,
             useSdk: useSdk);
 
@@ -640,9 +646,12 @@ class AnalyzerCompilerConfiguration extends CompilerConfiguration {
       List arguments,
       Map<String, String> environmentOverrides) {
     arguments = new List.from(arguments);
-    if (isChecked) {
+    if (isChecked || isStrong) {
       arguments.add('--enable_type_checks');
     }
+    if (isStrong){
+      arguments.add('--strong');
+    }
     return new CommandArtifact(<Command>[
       commandBuilder.getAnalysisCommand('dart2analyzer',
           computeCompilerPath(buildDir), arguments, environmentOverrides,

tools/testing/dart/test_configurations.dart

@@ -103,6 +103,7 @@ Future testConfigurations(List<Map> configurations) async {
           .map((name) => conf[name])
           .toList();
       if (conf['checked']) settings.add('checked');
+      if (conf['strong']) settings.add('strong');
       if (conf['noopt']) settings.add('noopt');
       output_words.add(settings.join('_'));
     }

tools/testing/dart/test_options.dart

@@ -163,6 +163,9 @@ class TestOptionsParser {
       new _TestOptionSpecification(
           'checked', 'Run tests in checked mode', ['--checked'], [], false,
           type: 'bool'),
+      new _TestOptionSpecification(
+          'strong', 'Run tests in strong mode', ['--strong'], [], false,
+          type: 'bool'),
       new _TestOptionSpecification('host_checked',
           'Run compiler in checked mode', ['--host-checked'], [], false,
           type: 'bool'),

tools/testing/dart/test_progress.dart

@@ -255,6 +255,7 @@ class TestOutcomeLogWriter extends EventListener {
     'compiler',
     'runtime',
     'checked',
+    'strong',
     'host_checked',
     'minified',
     'csp',

tools/testing/dart/test_suite.dart

@@ -377,25 +377,27 @@ abstract class TestSuite {
 
   String createOutputDirectory(Path testPath, String optionsName) {
     var checked = configuration['checked'] ? '-checked' : '';
+    var strong =  configuration['strong'] ? '-strong' : '';
     var minified = configuration['minified'] ? '-minified' : '';
     var sdk = configuration['use_sdk'] ? '-sdk' : '';
     var packages =
         configuration['use_public_packages'] ? '-public_packages' : '';
     var dirName = "${configuration['compiler']}-${configuration['runtime']}"
-        "$checked$minified$packages$sdk";
+        "$checked$strong$minified$packages$sdk";
     return createGeneratedTestDirectoryHelper(
         "tests", dirName, testPath, optionsName);
   }
 
   String createCompilationOutputDirectory(Path testPath) {
     var checked = configuration['checked'] ? '-checked' : '';
+    var strong =  configuration['strong'] ? '-strong' : '';
     var minified = configuration['minified'] ? '-minified' : '';
     var csp = configuration['csp'] ? '-csp' : '';
     var sdk = configuration['use_sdk'] ? '-sdk' : '';
     var packages =
         configuration['use_public_packages'] ? '-public_packages' : '';
     var dirName = "${configuration['compiler']}"
-        "$checked$minified$csp$packages$sdk";
+        "$checked$strong$minified$csp$packages$sdk";
     return createGeneratedTestDirectoryHelper(
         "compilations", dirName, testPath, "");
   }
@@ -2211,13 +2213,14 @@ class TestUtils {
         configuration['compiler'] == 'dart2appjit' ||
         configuration['compiler'] == 'precompiler') {
       var checked = configuration['checked'] ? '-checked' : '';
+      var strong =  configuration['strong'] ? '-strong' : '';
       var minified = configuration['minified'] ? '-minified' : '';
       var csp = configuration['csp'] ? '-csp' : '';
       var sdk = configuration['use_sdk'] ? '-sdk' : '';
       var packages =
           configuration['use_public_packages'] ? '-public_packages' : '';
       var dirName = "${configuration['compiler']}"
-          "$checked$minified$csp$packages$sdk";
+          "$checked$strong$minified$csp$packages$sdk";
       String generatedPath = "${TestUtils.buildDir(configuration)}"
           "/generated_compilations/$dirName";
       TestUtils.deleteDirectory(generatedPath);