[Mac] Implement the system dictionary popup by implementing NSTextInput methods.

chrome/common/attributed_string_coder_mac_unittest.mm

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <AppKit/AppKit.h>
+
+#include "base/memory/scoped_nsobject.h"
+#include "base/memory/scoped_ptr.h"
+#import "chrome/common/attributed_string_coder_mac.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/gtest_mac.h"
+
+using mac::AttributedStringCoder;
+
+class AttributedStringCoderTest : public testing::Test {
+ public:
+  NSMutableAttributedString* NewAttrString() {
+    NSString* str = @"The quick brown fox jumped over the lazy dog.";
+    return [[NSMutableAttributedString alloc] initWithString:str];
+  }
+
+  NSDictionary* FontAttribute(NSString* name, CGFloat size) {
+    NSFont* font = [NSFont fontWithName:name size:size];
+    return [NSDictionary dictionaryWithObject:font forKey:NSFontAttributeName];
+  }
+
+  NSAttributedString* EncodeAndDecode(NSAttributedString* str) {
+    scoped_ptr<const AttributedStringCoder::EncodedString> encoded_str(
+        AttributedStringCoder::Encode(str));
+    return AttributedStringCoder::Decode(encoded_str.get());
+  }
+};
+
+TEST_F(AttributedStringCoderTest, SimpleString) {
+  scoped_nsobject<NSMutableAttributedString> attr_str(NewAttrString());
+  [attr_str addAttributes:FontAttribute(@"Helvetica", 12.5)
+                    range:NSMakeRange(0, [attr_str length])];
+
+  NSAttributedString* decoded = EncodeAndDecode(attr_str.get());
+  EXPECT_NSEQ(attr_str.get(), decoded);
+}
+
+TEST_F(AttributedStringCoderTest, NoAttributes) {
+  scoped_nsobject<NSAttributedString> attr_str(NewAttrString());
+  NSAttributedString* decoded = EncodeAndDecode(attr_str.get());
+  EXPECT_NSEQ(attr_str.get(), decoded);
+}
+
+TEST_F(AttributedStringCoderTest, StripColor) {
+  scoped_nsobject<NSMutableAttributedString> attr_str(NewAttrString());
+  const NSUInteger kStringLength = [attr_str length];
+  [attr_str addAttribute:NSFontAttributeName
+                   value:[NSFont systemFontOfSize:26]
+                   range:NSMakeRange(0, kStringLength)];
+  [attr_str addAttribute:NSForegroundColorAttributeName
+                   value:[NSColor redColor]
+                   range:NSMakeRange(0, kStringLength)];
+
+  NSAttributedString* decoded = EncodeAndDecode(attr_str.get());
+
+  NSRange range;
+  NSDictionary* attrs = [decoded attributesAtIndex:0 effectiveRange:&range];
+  EXPECT_TRUE(NSEqualRanges(NSMakeRange(0, kStringLength), range));
+  EXPECT_NSEQ([NSFont systemFontOfSize:26],
+              [attrs objectForKey:NSFontAttributeName]);
+  EXPECT_FALSE([attrs objectForKey:NSForegroundColorAttributeName]);
+}
+
+TEST_F(AttributedStringCoderTest, MultipleFonts) {
+  scoped_nsobject<NSMutableAttributedString> attr_str(NewAttrString());
+  [attr_str setAttributes:FontAttribute(@"Courier", 12)
+                    range:NSMakeRange(0, 10)];
+  [attr_str addAttributes:FontAttribute(@"Helvetica", 16)
+                    range:NSMakeRange(12, 6)];
+  [attr_str addAttributes:FontAttribute(@"Helvetica", 14)
+                    range:NSMakeRange(15, 5)];
+
+  NSAttributedString* decoded = EncodeAndDecode(attr_str);
+
+  EXPECT_NSEQ(attr_str.get(), decoded);
+}
+
+TEST_F(AttributedStringCoderTest, NoPertinentAttributes) {
+  scoped_nsobject<NSMutableAttributedString> attr_str(NewAttrString());
+  [attr_str addAttribute:NSForegroundColorAttributeName
+                   value:[NSColor blueColor]
+                   range:NSMakeRange(0, 10)];
+  [attr_str addAttribute:NSBackgroundColorAttributeName
+                   value:[NSColor blueColor]
+                   range:NSMakeRange(15, 5)];
+  [attr_str addAttribute:NSKernAttributeName
+                   value:[NSNumber numberWithFloat:2.6]
+                   range:NSMakeRange(11, 3)];
+
+  NSAttributedString* decoded = EncodeAndDecode(attr_str.get());
+
+  scoped_nsobject<NSAttributedString> expected(NewAttrString());
+  EXPECT_NSEQ(expected.get(), decoded);
+}
+
+TEST_F(AttributedStringCoderTest, NilString) {
+  NSAttributedString* decoded = EncodeAndDecode(nil);
+  EXPECT_TRUE(decoded);
+  EXPECT_EQ(0U, [decoded length]);
+}