Move package:testing to SDK.

pkg/testing/lib/src/multitest.dart

+// Copyright (c) 2016, 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.md file.
+
+library testing.multitest;
+
+import 'dart:async' show
+    Stream,
+    StreamTransformer;
+
+import 'dart:io' show
+    Directory,
+    File;
+
+import 'log.dart' show
+    splitLines;
+
+import 'test_description.dart' show
+    TestDescription;
+
+class MultitestTransformer
+    implements StreamTransformer<TestDescription, TestDescription> {
+  static const String multitestMarker = "///";
+
+  static const List<String> validOutcomesList = const <String>[
+      'ok',
+      'compile-time error',
+      'runtime error',
+      'static type warning',
+      'dynamic type error',
+      'checked mode compile-time error',
+    ];
+
+  static final Set<String> validOutcomes =
+      new Set<String>.from(validOutcomesList);
+
+  Stream<TestDescription> bind(Stream<TestDescription> stream) async* {
+    List<String> errors = <String>[];
+    reportError(String error) {
+      errors.add(error);
+      print(error);
+    }
+    nextTest: await for (TestDescription test in stream) {
+      String contents = await test.file.readAsString();
+      if (!contents.contains(multitestMarker)) {
+        yield test;
+        continue nextTest;
+      }
+      // Note: this is modified in the loop below.
+      List<String> linesWithoutAnnotations = <String>[];
+      Map<String, List<String>> testsAsLines = <String, List<String>>{
+        "none": linesWithoutAnnotations,
+      };
+      Map<String, Set<String>> outcomes = <String, Set<String>>{
+        "none": new Set<String>(),
+      };
+      int lineNumber = 0;
+      for (String line in splitLines(contents)) {
+        lineNumber++;
+        int index = line.indexOf(multitestMarker);
+        String subtestName;
+        List<String> subtestOutcomesList;
+        if (index != -1) {
+          String annotationText =
+              line.substring(index + multitestMarker.length).trim();
+          index = annotationText.indexOf(":");
+          if (index != -1) {
+            subtestName = annotationText.substring(0, index).trim();
+            subtestOutcomesList = annotationText.substring(index + 1).split(",")
+                .map((s) => s.trim()).toList();
+            if (subtestName == "none") {
+              reportError(test.formatError(
+                      "$lineNumber: $subtestName can't be used as test name."));
+              continue nextTest;
+            }
+            if (subtestOutcomesList.isEmpty) {
+              reportError(test.formatError(
+                      "$lineNumber: Expected <testname>:<outcomes>"));
+              continue nextTest;
+            }
+          }
+        }
+        if (subtestName != null) {
+          List<String> lines = testsAsLines.putIfAbsent(subtestName,
+              () => new List<String>.from(linesWithoutAnnotations));
+          lines.add(line);
+          Set<String> subtestOutcomes = outcomes.putIfAbsent(subtestName,
+              () => new Set<String>());
+          if (subtestOutcomesList.length != 1 ||
+              subtestOutcomesList.single != "continued") {
+            for (String outcome in subtestOutcomesList) {
+              if (validOutcomes.contains(outcome)) {
+                subtestOutcomes.add(outcome);
+              } else {
+                reportError(test.formatError(
+                        "$lineNumber: '$outcome' isn't a recognized outcome."));
+                continue nextTest;
+              }
+            }
+          }
+        } else {
+          for (List<String> lines in testsAsLines.values) {
+            // This will also modify [linesWithoutAnnotations].
+            lines.add(line);
+          }
+        }
+      }
+      Uri root = Uri.base.resolve("generated/");
+      Directory generated = new Directory.fromUri(root.resolve(test.shortName));
+      generated = await generated.create(recursive: true);
+      for (String name in testsAsLines.keys) {
+        List<String> lines = testsAsLines[name];
+        Uri uri = generated.uri.resolve("${name}_generated.dart");
+        TestDescription subtest =
+            new TestDescription(root, new File.fromUri(uri));
+        await subtest.file.writeAsString(lines.join(""));
+        yield subtest;
+      }
+    }
+    if (errors.isNotEmpty) {
+      throw "Error: ${errors.join("\n")}";
+    }
+  }
+}