Add navigation support in plugins

pkg/analyzer_plugin/test/src/utilities/navigation_test.dart

+// Copyright (c) 2017, 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:analyzer_plugin/protocol/protocol_common.dart';
+import 'package:analyzer_plugin/src/utilities/navigation.dart';
+import 'package:test/test.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+void main() {
+  defineReflectiveTests(NavigationCollectorImplTest);
+}
+
+@reflectiveTest
+class NavigationCollectorImplTest {
+  NavigationCollectorImpl collector = new NavigationCollectorImpl();
+
+  test_createRegions_multiple() {
+    // Two files, each with two targets.
+    String fileA = 'a.dart';
+    int targetOffsetA1 = 1;
+    int targetLengthA1 = 2;
+    int targetStartLineA1 = 3;
+    int targetStartColumnA1 = 4;
+    ElementKind targetKindA1 = ElementKind.CLASS;
+    Location targetLocationA1 = new Location(fileA, targetOffsetA1,
+        targetLengthA1, targetStartLineA1, targetStartColumnA1);
+    int targetOffsetA2 = 5;
+    int targetLengthA2 = 6;
+    int targetStartLineA2 = 7;
+    int targetStartColumnA2 = 8;
+    ElementKind targetKindA2 = ElementKind.FUNCTION;
+    Location targetLocationA2 = new Location(fileA, targetOffsetA2,
+        targetLengthA2, targetStartLineA2, targetStartColumnA2);
+
+    String fileB = 'b.dart';
+    int targetOffsetB1 = 9;
+    int targetLengthB1 = 10;
+    int targetStartLineB1 = 11;
+    int targetStartColumnB1 = 12;
+    ElementKind targetKindB1 = ElementKind.ENUM;
+    Location targetLocationB1 = new Location(fileB, targetOffsetB1,
+        targetLengthB1, targetStartLineB1, targetStartColumnB1);
+    int targetOffsetB2 = 13;
+    int targetLengthB2 = 14;
+    int targetStartLineB2 = 15;
+    int targetStartColumnB2 = 16;
+    ElementKind targetKindB2 = ElementKind.METHOD;
+    Location targetLocationB2 = new Location(fileB, targetOffsetB2,
+        targetLengthB2, targetStartLineB2, targetStartColumnB2);
+
+    // Six regions targeting a1, b1, a2, b1, a1, b2
+    List<int> regionOffsets = [17, 18, 19, 20, 21, 22];
+    List<int> regionLengths = [23, 24, 25, 26, 27, 28];
+    List<ElementKind> targetKinds = [
+      targetKindA1,
+      targetKindB1,
+      targetKindA2,
+      targetKindB1,
+      targetKindA1,
+      targetKindB2
+    ];
+    List<Location> targetLocations = [
+      targetLocationA1,
+      targetLocationB1,
+      targetLocationA2,
+      targetLocationB1,
+      targetLocationA1,
+      targetLocationB2
+    ];
+    for (int i = 0; i < 6; i++) {
+      collector.addRegion(regionOffsets[i], regionLengths[i], targetKinds[i],
+          targetLocations[i]);
+    }
+
+    collector.createRegions();
+    expect(collector.files, [fileA, fileB]);
+    expect(collector.regions, [
+      new NavigationRegion(regionOffsets[0], regionLengths[0], [0]),
+      new NavigationRegion(regionOffsets[1], regionLengths[1], [1]),
+      new NavigationRegion(regionOffsets[2], regionLengths[2], [2]),
+      new NavigationRegion(regionOffsets[3], regionLengths[3], [1]),
+      new NavigationRegion(regionOffsets[4], regionLengths[4], [0]),
+      new NavigationRegion(regionOffsets[5], regionLengths[5], [3]),
+    ]);
+    expect(collector.targets, [
+      new NavigationTarget(targetKindA1, 0, targetOffsetA1, targetLengthA1,
+          targetStartLineA1, targetStartColumnA1),
+      new NavigationTarget(targetKindB1, 1, targetOffsetB1, targetLengthB1,
+          targetStartLineB1, targetStartColumnB1),
+      new NavigationTarget(targetKindA2, 0, targetOffsetA2, targetLengthA2,
+          targetStartLineA2, targetStartColumnA2),
+      new NavigationTarget(targetKindB2, 1, targetOffsetB2, targetLengthB2,
+          targetStartLineB2, targetStartColumnB2),
+    ]);
+  }
+
+  test_createRegions_none() {
+    collector.createRegions();
+    expect(collector.files, isEmpty);
+    expect(collector.regions, isEmpty);
+    expect(collector.targets, isEmpty);
+  }
+
+  test_createRegions_single() {
+    int regionOffset = 13;
+    int regionLength = 7;
+    ElementKind targetKind = ElementKind.CLASS;
+    String targetFile = 'c.dart';
+    int targetOffset = 17;
+    int targetLength = 1;
+    int targetStartLine = 5;
+    int targetStartColumn = 1;
+    Location targetLocation = new Location(targetFile, targetOffset,
+        targetLength, targetStartLine, targetStartColumn);
+    collector.addRegion(regionOffset, regionLength, targetKind, targetLocation);
+    collector.createRegions();
+    expect(collector.files, [targetFile]);
+    expect(collector.regions, [
+      new NavigationRegion(regionOffset, regionLength, [0])
+    ]);
+    expect(collector.targets, [
+      new NavigationTarget(targetKind, 0, targetOffset, targetLength,
+          targetStartLine, targetStartColumn)
+    ]);
+  }
+}