Expand the JSON reporter to enable a progress bar.

test/runner/json_reporter_test.dart

 // Copyright (c) 2015, 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.
 
 @TestOn("vm")
 
 import 'dart:convert';
 
 import 'package:scheduled_test/descriptor.dart' as d;
 import 'package:scheduled_test/scheduled_stream.dart';
@@ skipping 13 matching lines @@
 void main() {
   useSandbox();
 
   test("runs several successful tests and reports when each completes", () {
     _expectReport("""
       test('success 1', () {});
       test('success 2', () {});
       test('success 3', () {});
     """, [
       _start,
+      _allSuites(),
       _suite(0),
       _testStart(1, "loading test.dart", groupIDs: []),
       _testDone(1, hidden: true),
-      _group(2),
+      _group(2, testCount: 3),
       _testStart(3, "success 1"),
       _testDone(3),
       _testStart(4, "success 2"),
       _testDone(4),
       _testStart(5, "success 3"),
       _testDone(5),
       _done()
     ]);
   });
 
   test("runs several failing tests and reports when each fails", () {
     _expectReport("""
       test('failure 1', () => throw new TestFailure('oh no'));
       test('failure 2', () => throw new TestFailure('oh no'));
       test('failure 3', () => throw new TestFailure('oh no'));
     """, [
       _start,
+      _allSuites(),
       _suite(0),
       _testStart(1, "loading test.dart", groupIDs: []),
       _testDone(1, hidden: true),
-      _group(2),
+      _group(2, testCount: 3),
       _testStart(3, "failure 1"),
       _error(3, "oh no", isFailure: true),
       _testDone(3, result: "failure"),
       _testStart(4, "failure 2"),
       _error(4, "oh no", isFailure: true),
       _testDone(4, result: "failure"),
       _testStart(5, "failure 3"),
       _error(5, "oh no", isFailure: true),
       _testDone(5, result: "failure"),
       _done(success: false)
@@ skipping 17 matching lines @@
   });
 
   test("runs failing tests along with successful tests", () {
     _expectReport("""
       test('failure 1', () => throw new TestFailure('oh no'));
       test('success 1', () {});
       test('failure 2', () => throw new TestFailure('oh no'));
       test('success 2', () {});
     """, [
       _start,
+      _allSuites(),
       _suite(0),
       _testStart(1, "loading test.dart", groupIDs: []),
       _testDone(1, hidden: true),
-      _group(2),
+      _group(2, testCount: 4),
       _testStart(3, "failure 1"),
       _error(3, "oh no", isFailure: true),
       _testDone(3, result: "failure"),
       _testStart(4, "success 1"),
       _testDone(4),
       _testStart(5, "failure 2"),
       _error(5, "oh no", isFailure: true),
       _testDone(5, result: "failure"),
       _testStart(6, "success 2"),
       _testDone(6),
       _done(success: false)
     ]);
   });
 
   test("gracefully handles multiple test failures in a row", () {
     _expectReport("""
       // This completer ensures that the test isolate isn't killed until all
       // errors have been thrown.
       var completer = new Completer();
       test('failures', () {
         new Future.microtask(() => throw 'first error');
         new Future.microtask(() => throw 'second error');
         new Future.microtask(() => throw 'third error');
         new Future.microtask(completer.complete);
       });
       test('wait', () => completer.future);
     """, [
       _start,
+      _allSuites(),
       _suite(0),
       _testStart(1, "loading test.dart", groupIDs: []),
       _testDone(1, hidden: true),
-      _group(2),
+      _group(2, testCount: 2),
       _testStart(3, "failures"),
       _error(3, "first error"),
       _error(3, "second error"),
       _error(3, "third error"),
       _testDone(3, result: "error"),
       _testStart(4, "wait"),
       _testDone(4),
       _done(success: false)
     ]);
   });
@@ skipping 10 matching lines @@
           new Future.microtask(testDone.complete);
           throw 'oh no';
         });
       });
       test('wait', () {
         waitStarted.complete();
         return testDone.future;
       });
     """, [
       _start,
+      _allSuites(),
       _suite(0),
       _testStart(1, "loading test.dart", groupIDs: []),
       _testDone(1, hidden: true),
-      _group(2),
+      _group(2, testCount: 2),
       _testStart(3, "failure"),
       _testDone(3),
       _testStart(4, "wait"),
       _error(3, "oh no"),
       _error(3,
           "This test failed after it had already completed. Make sure to "
             "use [expectAsync]\n"
           "or the [completes] matcher when testing async code."),
       _testDone(4),
       _done(success: false)
     ]);
   });
 
   test("reports each test in its proper groups", () {
     _expectReport("""
       group('group 1', () {
         group('.2', () {
           group('.3', () {
             test('success', () {});
           });
         });
 
         test('success', () {});
         test('success', () {});
       });
     """, [
       _start,
+      _allSuites(),
       _suite(0),
       _testStart(1, "loading test.dart", groupIDs: []),
       _testDone(1, hidden: true),
-      _group(2),
-      _group(3, name: "group 1", parentID: 2),
+      _group(2, testCount: 3),
+      _group(3, name: "group 1", parentID: 2, testCount: 3),
       _group(4, name: "group 1 .2", parentID: 3),
       _group(5, name: "group 1 .2 .3", parentID: 4),
       _testStart(6, 'group 1 .2 .3 success', groupIDs: [2, 3, 4, 5]),
       _testDone(6),
       _testStart(7, 'group 1 success', groupIDs: [2, 3]),
       _testDone(7),
       _testStart(8, 'group 1 success', groupIDs: [2, 3]),
       _testDone(8),
       _done()
     ]);
   });
 
   group("print:", () {
     test("handles multiple prints", () {
       _expectReport("""
         test('test', () {
           print("one");
           print("two");
           print("three");
           print("four");
         });
       """, [
         _start,
+        _allSuites(),
         _suite(0),
         _testStart(1, "loading test.dart", groupIDs: []),
         _testDone(1, hidden: true),
         _group(2),
         _testStart(3, 'test'),
         _print(3, "one"),
         _print(3, "two"),
         _print(3, "three"),
         _print(3, "four"),
         _testDone(3),
@@ skipping 16 matching lines @@
             new Future(testDone.complete);
           });
         });
 
         test('wait', () {
           waitStarted.complete();
           return testDone.future;
         });
       """, [
         _start,
+        _allSuites(),
         _suite(0),
         _testStart(1, "loading test.dart", groupIDs: []),
         _testDone(1, hidden: true),
-        _group(2),
+        _group(2, testCount: 2),
         _testStart(3, 'test'),
         _testDone(3),
         _testStart(4, 'wait'),
         _print(3, "one"),
         _print(3, "two"),
         _print(3, "three"),
         _print(3, "four"),
         _testDone(4),
         _done()
       ]);
@@ skipping 18 matching lines @@
           });
 
           print("one");
           print("two");
           throw "first error";
         });
 
         test('wait', () => completer.future);
       """, [
         _start,
+        _allSuites(),
         _suite(0),
         _testStart(1, "loading test.dart", groupIDs: []),
         _testDone(1, hidden: true),
-        _group(2),
+        _group(2, testCount: 2),
         _testStart(3, 'test'),
         _print(3, "one"),
         _print(3, "two"),
         _error(3, "first error"),
         _print(3, "three"),
         _print(3, "four"),
         _error(3, "second error"),
         _print(3, "five"),
         _print(3, "six"),
         _testDone(3, result: "error"),
         _testStart(4, 'wait'),
         _testDone(4),
         _done(success: false)
       ]);
     });
   });
 
   group("skip:", () {
     test("reports skipped tests", () {
       _expectReport("""
         test('skip 1', () {}, skip: true);
         test('skip 2', () {}, skip: true);
         test('skip 3', () {}, skip: true);
       """, [
         _start,
+        _allSuites(),
         _suite(0),
         _testStart(1, "loading test.dart", groupIDs: []),
         _testDone(1, hidden: true),
-        _group(2),
+        _group(2, testCount: 3),
         _testStart(3, "skip 1", skip: true),
         _testDone(3),
         _testStart(4, "skip 2", skip: true),
         _testDone(4),
         _testStart(5, "skip 3", skip: true),
         _testDone(5),
         _done()
       ]);
     });
 
     test("reports skipped groups", () {
       _expectReport("""
         group('skip', () {
           test('success 1', () {});
           test('success 2', () {});
           test('success 3', () {});
         }, skip: true);
       """, [
         _start,
+        _allSuites(),
         _suite(0),
         _testStart(1, "loading test.dart", groupIDs: []),
         _testDone(1, hidden: true),
-        _group(2),
-        _group(3, name: "skip", parentID: 2, skip: true),
+        _group(2, testCount: 0),
+        _group(3, name: "skip", parentID: 2, skip: true, testCount: 0),
         _testStart(4, "skip", groupIDs: [2, 3], skip: true),
         _testDone(4),
         _done()
       ]);
     });
 
     test("reports the skip reason if available", () {
       _expectReport("""
         test('skip 1', () {}, skip: 'some reason');
         test('skip 2', () {}, skip: 'or another');
       """, [
         _start,
+         _allSuites(),
         _suite(0),
         _testStart(1, "loading test.dart", groupIDs: []),
         _testDone(1, hidden: true),
-        _group(2),
+        _group(2, testCount: 2),
         _testStart(3, "skip 1", skip: "some reason"),
         _testDone(3),
         _testStart(4, "skip 2", skip: "or another"),
         _testDone(4),
         _done()
       ]);
     });
   });
 }
 
@@ skipping 27 matching lines @@
     // Remove excess trailing whitespace.
     for (var i = 0; i < stdoutLines.length; i++) {
       var event = JSON.decode(stdoutLines[i]);
       expect(event.remove("time"), new isInstanceOf<int>());
       event.remove("stackTrace");
       expect(event, equals(expected[i]));
     }
   });
 }
 
+/// Returns the event emitted by the JSON reporter providing information about
+/// all suites.
+///
+/// The [count] defaults to 1.
+Map _allSuites({int count}) {
+  return {
+    "type": "allSuites",
+    "count": count ?? 1
+  };
+}
+
 /// Returns the event emitted by the JSON reporter indicating that a suite has
 /// begun running.
 ///
 /// The [platform] defaults to `"vm"`, the [path] defaults to `"test.dart"`.
 Map _suite(int id, {String platform, String path}) {
   return {
     "type": "suite",
     "suite": {
       "id": id,
       "platform": platform ?? "vm",
       "path": path ?? "test.dart"
     }
   };
 }
 
 /// Returns the event emitted by the JSON reporter indicating that a group has
 /// begun running.
 ///
 /// If [skip] is `true`, the group is expected to be marked as skipped without a
 /// reason. If it's a [String], the group is expected to be marked as skipped
 /// with that reason.
-Map _group(int id, {String name, int suiteID, int parentID, skip}) {
+///
+/// The [testCount] parameter indicates the number of tests in the group. It
+/// defaults to 1.
+Map _group(int id, {String name, int suiteID, int parentID, skip,
+    int testCount}) {
   return {
     "type": "group",
     "group": {
       "id": id,
       "name": name,
       "suiteID": suiteID ?? 0,
       "parentID": parentID,
-      "metadata": _metadata(skip: skip)
+      "metadata": _metadata(skip: skip),
+      "testCount": testCount ?? 1
     }
   };
 }
 
 /// Returns the event emitted by the JSON reporter indicating that a test has
 /// begun running.
 ///
 /// If [parentIDs] is passed, it's the IDs of groups containing this test. If
 /// [skip] is `true`, the test is expected to be marked as skipped without a
 /// reason. If it's a [String], the test is expected to be marked as skipped
@@ skipping 56 matching lines @@
 /// Returns the serialized metadata corresponding to [skip].
 Map _metadata({skip}) {
   if (skip == true) {
     return {"skip": true, "skipReason": null};
   } else if (skip is String) {
     return {"skip": true, "skipReason": skip};
   } else {
     return {"skip": false, "skipReason": null};
   }
 }