Fix bug in equalsIgnoreAsciiCase.

test/ignore_ascii_case_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.
+
+/// Tests case-ignoring compare and equality.
+
+import "package:collection/collection.dart";
+import "package:test/test.dart";
+
+main() {
+  test("equality ignore ASCII case", () {
+    var strings = [
+      "0@`aopz[{",
+      "0@`aopz[{",
+      "0@`Aopz[{",
+      "0@`aOpz[{",
+      "0@`AOpz[{",
+      "0@`aoPz[{",
+      "0@`AoPz[{",
+      "0@`aOPz[{",
+      "0@`AOPz[{",
+      "0@`aopZ[{",
+      "0@`AopZ[{",
+      "0@`aOpZ[{",
+      "0@`AOpZ[{",
+      "0@`aoPZ[{",
+      "0@`AoPZ[{",
+      "0@`aOPZ[{",
+      "0@`AOPZ[{",
+    ];
+
+    for (var s1 in strings) {
+      for (var s2 in strings) {
+        var reason = "$s1 =?= $s2";
+        expect(equalsIgnoreAsciiCase(s1, s2), true, reason: reason);
+        expect(hashIgnoreAsciiCase(s1), hashIgnoreAsciiCase(s2),
+               reason: reason);
+      }
+    }
+
+    var upperCaseLetters = "@`abcdefghijklmnopqrstuvwxyz[{åÅ";
+    var lowerCaseLetters = "@`ABCDEFGHIJKLMNOPQRSTUVWXYZ[{åÅ";
+    expect(equalsIgnoreAsciiCase(upperCaseLetters, lowerCaseLetters), true);
+
+    testChars(char1, char2, areEqual) {
+      expect(equalsIgnoreAsciiCase(char1, char2), areEqual,
+             reason: "$char1 ${areEqual ? "=" : "!"}= $char2");
+    }
+    for (int i = 0; i < upperCaseLetters.length; i++) {
+      for (int j = 0; i < upperCaseLetters.length; i++) {
+        testChars(upperCaseLetters[i], upperCaseLetters[j], i == j);
+        testChars(lowerCaseLetters[i], upperCaseLetters[j], i == j);
+        testChars(upperCaseLetters[i], lowerCaseLetters[j], i == j);
+        testChars(lowerCaseLetters[i], lowerCaseLetters[j], i == j);
+      }
+    }
+  });
+}