Move package:testing to SDK.

pkg/testing/lib/src/log.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.log;
+
+import 'chain.dart' show
+    Result,
+    Step;
+
+import 'suite.dart' show
+    Suite;
+
+import 'test_description.dart' show
+    TestDescription;
+
+import 'test_dart/status_file_parser.dart' show
+    Expectation;
+
+/// ANSI escape code for moving cursor one line up.
+/// See [CSI codes](https://en.wikipedia.org/wiki/ANSI_escape_code#CSI_codes).
+const String cursorUp = "\u001b[1A";
+
+/// ANSI escape code for erasing the entire line.
+/// See [CSI codes](https://en.wikipedia.org/wiki/ANSI_escape_code#CSI_codes).
+const String eraseLine = "\u001b[2K";
+
+final Stopwatch wallclock = new Stopwatch()..start();
+
+bool _isVerbose = const bool.fromEnvironment("verbose");
+
+bool get isVerbose => _isVerbose;
+
+void enableVerboseOutput() {
+  _isVerbose = true;
+}
+
+void logTestComplete(int completed, int failed, int total,
+    Suite suite, TestDescription description) {
+  String message = formatProgress(completed, failed, total);
+  if (suite != null) {
+    message += ": ${formatTestDescription(suite, description)}";
+  }
+  logProgress(message);
+}
+
+void logStepStart(int completed, int failed, int total,
+    Suite suite, TestDescription description, Step step) {
+  String message = formatProgress(completed, failed, total);
+  if (suite != null) {
+    message += ": ${formatTestDescription(suite, description)} ${step.name}";
+    if (step.isAsync) {
+      message += "...";
+    }
+  }
+  logProgress(message);
+}
+
+void logStepComplete(int completed, int failed, int total,
+    Suite suite, TestDescription description, Step step) {
+  if (!step.isAsync) return;
+  String message = formatProgress(completed, failed, total);
+  if (suite != null) {
+    message += ": ${formatTestDescription(suite, description)} ${step.name}!";
+  }
+  logProgress(message);
+}
+
+void logProgress(String message) {
+  if (isVerbose) {
+    print(message);
+  } else {
+    print("$eraseLine$message$cursorUp");
+  }
+}
+
+String formatProgress(int completed, int failed, int total) {
+  Duration elapsed = wallclock.elapsed;
+  String percent = pad((completed / total * 100.0).toStringAsFixed(1), 5);
+  String good = pad(completed, 5);
+  String bad = pad(failed, 5);
+  String minutes = pad(elapsed.inMinutes, 2, filler: "0");
+  String seconds = pad(elapsed.inSeconds % 60, 2, filler: "0");
+  return "[ $minutes:$seconds | $percent% | +$good | -$bad ]";
+}
+
+String formatTestDescription(Suite suite, TestDescription description) {
+  return "${suite.name}/${description.shortName}";
+}
+
+void logMessage(Object message) {
+  if (isVerbose) {
+    print("$message");
+  }
+}
+
+void logNumberedLines(String text) {
+  if (isVerbose) {
+    print(numberedLines(text));
+  }
+}
+
+void logUnexpectedResult(Suite suite, TestDescription description,
+    Result result, Set<Expectation> expectedOutcomes) {
+  print("${eraseLine}UNEXPECTED: ${suite.name}/${description.shortName}");
+  Uri statusFile = suite.statusFile;
+  if (statusFile != null) {
+    String path = statusFile.toFilePath();
+    if (result.outcome == Expectation.PASS) {
+      print("The test unexpectedly passed, please update $path.");
+    } else {
+      print("The test had the outcome ${result.outcome}, but the status file "
+          "($path) allows these outcomes: ${expectedOutcomes.join(' ')}");
+    }
+  }
+  String log = result.log;
+  if (log.isNotEmpty) {
+    print(log);
+  }
+  if (result.error != null) {
+    print(result.error);
+    if (result.trace != null) {
+      print(result.trace);
+    }
+  }
+}
+
+void logSuiteComplete() {
+  if (!isVerbose) {
+    print("");
+  }
+}
+
+void logUncaughtError(error, StackTrace stackTrace) {
+  logMessage(error);
+  if (stackTrace != null) {
+    logMessage(stackTrace);
+  }
+}
+
+String pad(Object o, int pad, {String filler: " "}) {
+  String result = (filler * pad) + "$o";
+  return result.substring(result.length - pad);
+}
+
+String numberedLines(String text) {
+  StringBuffer result = new StringBuffer();
+  int lineNumber = 1;
+  List<String> lines = splitLines(text);
+  int pad = "${lines.length}".length;
+  String fill = " " * pad;
+  for (String line in lines) {
+    String paddedLineNumber = "$fill$lineNumber";
+    paddedLineNumber =
+        paddedLineNumber.substring(paddedLineNumber.length - pad);
+    result.write("$paddedLineNumber: $line");
+    lineNumber++;
+  }
+  return '$result';
+}
+
+List<String> splitLines(String text) {
+  return text.split(new RegExp('^', multiLine: true));
+}