Update charted to 0.4.8 and roll

packages/source_span/test/highlight_test.dart

 // Copyright (c) 2014, 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:test/test.dart';
 import 'package:source_span/source_span.dart';
 import 'package:source_span/src/colors.dart' as colors;
 
 main() {
   var file;
   setUp(() {
     file = new SourceFile("""
 foo bar baz
 whiz bang boom
 zip zap zop
-""", url: "foo.dart");
+""");
   });
 
   test("points to the span in the source", () {
-    expect(file.span(4, 7).message("oh no"), equals("""
-line 1, column 5 of foo.dart: oh no
+    expect(file.span(4, 7).highlight(), equals("""
 foo bar baz
     ^^^"""));
   });
 
   test("gracefully handles a missing source URL", () {
     var span = new SourceFile("foo bar baz").span(4, 7);
-    expect(span.message("oh no"), equals("""
-line 1, column 5: oh no
+    expect(span.highlight(), equals("""
 foo bar baz
     ^^^"""));
   });
 
   test("highlights the first line of a multiline span", () {
-    expect(file.span(4, 20).message("oh no"), equals("""
-line 1, column 5 of foo.dart: oh no
+    expect(file.span(4, 20).highlight(), equals("""
 foo bar baz
     ^^^^^^^^"""));
   });
 
   test("works for a point span", () {
-    expect(file.location(4).pointSpan().message("oh no"), equals("""
-line 1, column 5 of foo.dart: oh no
+    expect(file.location(4).pointSpan().highlight(), equals("""
 foo bar baz
     ^"""));
   });
 
   test("works for a point span at the end of a line", () {
-    expect(file.location(11).pointSpan().message("oh no"), equals("""
-line 1, column 12 of foo.dart: oh no
+    expect(file.location(11).pointSpan().highlight(), equals("""
 foo bar baz
            ^"""));
   });
 
   test("works for a point span at the end of the file", () {
-    expect(file.location(38).pointSpan().message("oh no"), equals("""
-line 3, column 12 of foo.dart: oh no
+    expect(file.location(38).pointSpan().highlight(), equals("""
+zip zap zop
+           ^"""));
+  });
+
+  test("works for a point span at the end of the file with no trailing newline",
+      () {
+    file = new SourceFile("zip zap zop");
+    expect(file.location(11).pointSpan().highlight(), equals("""
 zip zap zop
            ^"""));
   });
 
   test("works for a point span in an empty file", () {
-    expect(new SourceFile("").location(0).pointSpan().message("oh no"),
+    expect(new SourceFile("").location(0).pointSpan().highlight(),
         equals("""
-line 1, column 1: oh no
 
 ^"""));
   });
 
   test("works for a single-line file without a newline", () {
-    expect(new SourceFile("foo bar").span(0, 7).message("oh no"),
+    expect(new SourceFile("foo bar").span(0, 7).highlight(),
         equals("""
-line 1, column 1: oh no
 foo bar
 ^^^^^^^"""));
   });
 
+  test("emits tabs for tabs", () {
+    expect(new SourceFile(" \t \t\tfoo bar").span(5, 8).highlight(),
+        equals("""
+ \t \t\tfoo bar
+ \t \t\t^^^"""));
+  });
+
+  test("supports lines of preceding context", () {
+    var span = new SourceSpanWithContext(
+        new SourceLocation(5, line: 3, column: 5, sourceUrl: "foo.dart"),
+        new SourceLocation(12, line: 3, column: 12, sourceUrl: "foo.dart"),
+        "foo bar",
+        "previous\nlines\n-----foo bar-----\nfollowing line\n");
+
+    expect(span.highlight(color: colors.YELLOW), equals("""
+previous
+lines
+-----${colors.YELLOW}foo bar${colors.NONE}-----
+     ${colors.YELLOW}^^^^^^^${colors.NONE}"""));
+  });
+
   group("colors", () {
     test("doesn't colorize if color is false", () {
-      expect(file.span(4, 7).message("oh no", color: false), equals("""
-line 1, column 5 of foo.dart: oh no
+      expect(file.span(4, 7).highlight(color: false), equals("""
 foo bar baz
     ^^^"""));
     });
 
     test("colorizes if color is true", () {
-      expect(file.span(4, 7).message("oh no", color: true), equals("""
-line 1, column 5 of foo.dart: oh no
+      expect(file.span(4, 7).highlight(color: true), equals("""
 foo ${colors.RED}bar${colors.NONE} baz
     ${colors.RED}^^^${colors.NONE}"""));
     });
 
     test("uses the given color if it's passed", () {
-      expect(file.span(4, 7).message("oh no", color: colors.YELLOW), equals("""
-line 1, column 5 of foo.dart: oh no
+      expect(file.span(4, 7).highlight(color: colors.YELLOW), equals("""
 foo ${colors.YELLOW}bar${colors.NONE} baz
     ${colors.YELLOW}^^^${colors.NONE}"""));
     });
   });
 }