Remove unintentional dependency on analysis_server

pkg/analyzer_plugin/test/src/utilities/string_utilities_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/src/utilities/string_utilities.dart';
+import 'package:test/test.dart' hide isEmpty;
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+main() {
+  defineReflectiveSuite(() {
+    defineReflectiveTests(StringUtilitiesTest);
+  });
+}
+
+@reflectiveTest
+class StringUtilitiesTest {
+  void test_getCamelWords() {
+    expect(getCamelWords(null), []);
+    expect(getCamelWords(''), []);
+    expect(getCamelWords('getCamelWords'), ['get', 'Camel', 'Words']);
+    expect(getCamelWords('getHTMLText'), ['get', 'HTML', 'Text']);
+  }
+
+  void test_isEmpty() {
+    expect(isEmpty(null), isTrue);
+    expect(isEmpty(''), isTrue);
+    expect(isEmpty('X'), isFalse);
+    expect(isEmpty(' '), isFalse);
+  }
+
+  void test_isLowerCase() {
+    for (int c in 'abcdefghijklmnopqrstuvwxyz'.codeUnits) {
+      expect(isLowerCase(c), isTrue);
+    }
+    for (int c in 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.codeUnits) {
+      expect(isLowerCase(c), isFalse);
+    }
+    expect(isLowerCase(' '.codeUnitAt(0)), isFalse);
+    expect(isLowerCase('0'.codeUnitAt(0)), isFalse);
+  }
+
+  void test_isUpperCase() {
+    for (int c in 'abcdefghijklmnopqrstuvwxyz'.codeUnits) {
+      expect(isUpperCase(c), isFalse);
+    }
+    for (int c in 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.codeUnits) {
+      expect(isUpperCase(c), isTrue);
+    }
+    expect(isUpperCase(' '.codeUnitAt(0)), isFalse);
+    expect(isUpperCase('0'.codeUnitAt(0)), isFalse);
+  }
+
+  void test_removeStart() {
+    expect(removeStart(null, 'x'), null);
+    expect(removeStart('abc', null), 'abc');
+    expect(removeStart('abcTest', 'abc'), 'Test');
+    expect(removeStart('my abcTest', 'abc'), 'my abcTest');
+  }
+}