Remove obsolete http_base package

dart/pkg/http_base/test/http_base_test.dart

-library http_base.http_base_test;
-
-import 'package:http_base/http_base.dart';
-import 'package:unittest/unittest.dart';
-
-main() {
-  group('headers-impl', () {
-    test('empty', () {
-      for (HeadersImpl emptyHeaders in [HeadersImpl.Empty,
-                                        new HeadersImpl({})]) {
-        expect(emptyHeaders.names, isEmpty);
-        expect(emptyHeaders['foo'], isNull);
-        expect(emptyHeaders.getMultiple('foo'), isNull);
-      }
-    });
-
-    test('multi-value', () {
-      var headers = new HeadersImpl({
-        'Single' : 'single-value',
-        'Mul' : ['mul-1', 'mul-2', 'mul-3,mul-4'],
-        'Mul-Inline' : 'mi-1,mi-2,mi-3',
-      });
-
-      expect(headers.names, hasLength(3));
-      expect(headers.names, contains('single'));
-      expect(headers.names, contains('mul'));
-      expect(headers.names, contains('mul-inline'));
-
-      for (var key in ['Single', 'single']) {
-        expect(headers[key], equals('single-value'));
-        expect(headers.getMultiple(key), equals(['single-value']));
-      }
-
-      for (var key in ['Mul', 'mul']) {
-        expect(headers[key], equals('mul-1,mul-2,mul-3,mul-4'));
-        expect(headers.getMultiple(key),
-               equals(['mul-1','mul-2','mul-3','mul-4']));
-      }
-
-      for (var key in ['Mul-Inline', 'mul-inline']) {
-        expect(headers[key], equals('mi-1,mi-2,mi-3'));
-        expect(headers.getMultiple(key), equals(['mi-1','mi-2','mi-3']));
-      }
-    });
-
-    test('cookie-headers', () {
-      var headers = new HeadersImpl({
-        'Set-Cookie' : [
-            'lang=en-US; Expires=Wed, 09 Jun 2021 10:18:14 GMT',
-            'lang=de-DE; Expires=Wed, 09 Jun 2021 10:18:14 GMT',],
-        'Cookie' : ['name1=value1; name2=value2', 'name3=value3'],
-      });
-
-      expect(() => headers['set-cookie'], throwsArgumentError);
-      expect(() => headers['cookie'], throwsArgumentError);
-
-      expect(headers.getMultiple('set-cookie').toList(), equals([
-          'lang=en-US; Expires=Wed, 09 Jun 2021 10:18:14 GMT',
-          'lang=de-DE; Expires=Wed, 09 Jun 2021 10:18:14 GMT']));
-
-      expect(headers.getMultiple('cookie').toList(),
-             equals(['name1=value1; name2=value2', 'name3=value3']));
-    });
-
-    test('replace', () {
-      var headers = new HeadersImpl({
-        'Single' : 'single-value',
-        'Mul' : ['mul-1', 'mul-2', 'mul-3,mul-4'],
-        'Mul-Inline' : 'mi-1,mi-2,mi-3',
-      }).replace({
-        'single' : 'foo',
-        'mul' : null,
-        'mul-inline' : 'bar',
-      });
-
-      expect(headers.names, hasLength(2));
-      expect(headers['single'], equals('foo'));
-      expect(headers['mul-inline'], equals('bar'));
-    });
-  });
-}