pkg/vm_service_client: add getSourceReport to VMServiceReference

test/source_report_test.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 file.
+
+import 'package:source_span/source_span.dart';
+import 'package:test/test.dart';
+import 'package:vm_service_client/vm_service_client.dart';
+
+import 'utils.dart';
+
+const _mainContent = r"""
+  print("one");
+  print("two");
+
+  if (false) {
+    print("three");
+    print("four");
+  }
+
+  Isolate.current.kill();
+""";
+
+void main() {
+  VMServiceClient client;
+  VMIsolateRef isolate;
+
+  tearDown(() {
+    if (client != null) client.close();
+  });
+
+  group('calling getSourceReport for a script with one range', () {
+    setUp(() async {
+      client = await runAndConnect(main: _mainContent);
+
+      isolate = (await client.getVM()).isolates.single;
+
+      await isolate.waitUntilPaused();
+    });
+
+    test("behaves correctly with options off", () async {

[nweiz, 2016/05/11 23:03:32]

The bulk of this test case isn't about the lack of information that comes from
turning options off, it's about testing the locations. The description should
describe what the test is actually testing.

[kevmoo, 2016/05/12 05:22:35]

Done.

+      var report = await isolate.getSourceReport(
+          includeCoverageReport: false, includePossibleBreakpoints: false);
+
+      expect(report.ranges, hasLength(greaterThan(1)));
+
+      var range = report.ranges.singleWhere((range) =>
+          range.script.uri.toString().startsWith('data:application/dart'));
+
+      expect(range.compiled, isTrue);
+
+      var script = await range.script.load();
+
+      var runnableIsolate = await isolate.loadRunnable();
+
+      var rootLib = await runnableIsolate.rootLibrary.load();
+      var mainFunction = await rootLib.functions['main'].load();
+
+      var mainLocation = script.sourceSpan(mainFunction.location);
+
+      var startLocation = script.sourceLocation(range.location.token);
+      expect(startLocation, mainLocation.start);
+
+      var endLocation = script.sourceLocation(range.location.end);
+      expect(endLocation, mainLocation.end);
+
+      expect(range.hits, isNull);
+      expect(range.misses, isNull);
+      expect(range.possibleBreakpoints, isNull);
+    });
+
+    test("behaves correctly without breakpoints", () async {

[nweiz, 2016/05/11 23:03:32]

This test case is primarily making assertions about coverage; its description
shouldn't be about breakpoints. Same below.

[kevmoo, 2016/05/12 05:22:35]

Done.

+      var report =
+          await isolate.getSourceReport(includePossibleBreakpoints: false);
+
+      var range = report.ranges.singleWhere((range) =>
+          range.script.uri.toString().startsWith('data:application/dart'));
+      expect(range.possibleBreakpoints, isNull);
+
+      var script = await range.script.load();
+
+      // represents the unique set of lines that are executed

[nweiz, 2016/05/11 23:03:31]

https://www.dartlang.org/effective-dart/documentation/#do-format-comments-lik...
https://www.dartlang.org/effective-dart/documentation/#prefer-starting-variab...

Also, this is not what I meant by "what lines these represent". I want you to
describe the Dart code being executed in the lines listed below. I want to
understand why there's one chunk of three lines followed by two lines that are
two apart from one another.

[kevmoo, 2016/05/12 05:22:35]

Acknowledged.

+      var hitLines =
+          range.hits.map((token) => script.sourceLocation(token).line).toSet();
+      expect(hitLines, [6, 7, 8, 15, 17]);
+
+      // represents the unique set of lines that are not executed
+      var missedLines =
+          range.misses.map((token) => script.sourceLocation(token).line);
+      expect(missedLines, [11, 12]);
+    });
+
+    test("behaves correctly without coverage", () async {
+      var report = await isolate.getSourceReport(includeCoverageReport: false);
+
+      var range = report.ranges.singleWhere((range) =>
+          range.script.uri.toString().startsWith('data:application/dart'));
+
+      expect(range.hits, isNull);
+      expect(range.misses, isNull);
+
+      var script = await range.script.load();
+      expect(range.possibleBreakpoints, isNotEmpty);
+
+      // represents the unique set of lines that can have breakpoints
+      var breakPointLines = range.possibleBreakpoints
+          .map((token) => script.sourceLocation(token).line)
+          .toSet();
+      expect(breakPointLines, [4, 6, 7, 8, 11, 12, 15, 17]);
+    });
+
+    test("behaves correctly including coverage and breakpoints", () async {
+      var report = await isolate.getSourceReport(
+          includeCoverageReport: true, includePossibleBreakpoints: true);
+
+      var range = report.ranges.singleWhere((range) =>
+          range.script.uri.toString().startsWith('data:application/dart'));
+
+      expect(range.hits, isNotEmpty);
+      expect(range.misses, isNotEmpty);
+      expect(range.possibleBreakpoints, isNotEmpty);
+    });
+  });
+
+  group('a script with multiple ranges', () {
+    VMScript script;
+    VMLibrary rootLib;
+    VMSourceLocation mainLocation;
+    FileSpan mainFunctionSpan;
+    VMSourceLocation unusedFunction2Location;
+
+    setUp(() async {
+      client = await runAndConnect(
+          topLevel: r'''final unusedField = 5;
+
+int unusedFunction(a, b) {
+  return a + b;
+}
+
+void unusedFunction2(value) {
+  print(value);
+}''',
+          main: _mainContent);
+
+      isolate = (await client.getVM()).isolates.single;
+
+      await isolate.waitUntilPaused();
+
+      var runnableIsolate = await isolate.loadRunnable();
+      rootLib = await runnableIsolate.rootLibrary.load();
+      script = await rootLib.scripts.single.load();
+
+      var mainFunction = await rootLib.functions['main'].load();
+      mainLocation = mainFunction.location;
+      mainFunctionSpan = script.sourceSpan(mainLocation);
+
+      var unusedFunction2 = await rootLib.functions['unusedFunction2'].load();
+      unusedFunction2Location = unusedFunction2.location;
+    });
+
+    test("not force compiled", () async {

[nweiz, 2016/05/11 23:03:32]

You didn't update this test name, or any others in this group.

[kevmoo, 2016/05/12 05:22:35]

Acknowledged.

+      var report = await script.getSourceReport(
+          includeCoverageReport: true, includePossibleBreakpoints: true);

[nweiz, 2016/05/11 23:03:31]

You don't need to set these to true anymore, here or anywhere else.

[kevmoo, 2016/05/12 05:22:35]

Acknowledged.

+
+      expect(report.ranges, hasLength(3));
+
+      var firstRange = report.ranges.first;
+      expect(firstRange.compiled, isFalse);
+      expect(firstRange.hits, isNull);
+      expect(firstRange.misses, isNull);
+      expect(firstRange.possibleBreakpoints, isNull);
+
+      // TODO(kevmoo): use lessThan in matcher when
+      // https://github.com/dart-lang/matcher/issues/33 is fixed
+      expect(script.sourceSpan(firstRange.location).compareTo(mainFunctionSpan),
+          isNegative);
+
+      var lastRange = report.ranges.last;
+      expect(lastRange.compiled, isTrue);
+      expect(script.sourceSpan(lastRange.location), mainFunctionSpan);

[nweiz, 2016/05/11 23:03:31]

"equals(mainFunctionSpan)"

Also below

[kevmoo, 2016/05/12 05:22:35]

Done.

+    });
+
+    test("force compiled", () async {
+      var report = await script.getSourceReport(
+          includeCoverageReport: true,
+          includePossibleBreakpoints: true,
+          forceCompile: true);
+
+      expect(report.ranges, hasLength(3));
+
+      var firstRange = report.ranges.first;
+      expect(firstRange.compiled, isTrue);
+
+      var secondRange = report.ranges.last;
+      expect(secondRange.compiled, isTrue);
+    });
+
+    test("with start set", () async {
+      var report = await script.getSourceReport(
+          includeCoverageReport: true,
+          includePossibleBreakpoints: true,
+          start: mainLocation.token);
+
+      expect(
+          script.sourceSpan(report.ranges.single.location), mainFunctionSpan);
+    });
+
+    test("with end set", () async {
+      var report = await script.getSourceReport(
+          includeCoverageReport: true,
+          includePossibleBreakpoints: true,
+          end: unusedFunction2Location.token);
+
+      expect(report.ranges, hasLength(2),
+          reason: 'Includes the range containing only unusedFunction2, main.');
+    });
+
+    test("with an empty token range", () async {
+      var report = await script.getSourceReport(
+          includeCoverageReport: true,
+          includePossibleBreakpoints: true,
+          start: unusedFunction2Location.token,
+          end: unusedFunction2Location.end);
+
+      expect(report.ranges, hasLength(1));
+      expect(script.sourceSpan(report.ranges.single.location),
+          script.sourceSpan(unusedFunction2Location));
+    });
+  });
+}