flutter_codecs_unittest.mm

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#import "flutter/shell/platform/darwin/common/framework/Headers/FlutterCodecs.h"
 
#include "gtest/gtest.h"
 
FLUTTER_ASSERT_ARC
 
TEST(FlutterStringCodec, CanEncodeAndDecodeNil) {
  FlutterStringCodec* codec = [FlutterStringCodec sharedInstance];
  ASSERT_TRUE([codec encode:nil] == nil);
  ASSERT_TRUE([codec decode:nil] == nil);
}
 
TEST(FlutterStringCodec, CanEncodeAndDecodeEmptyString) {
  FlutterStringCodec* codec = [FlutterStringCodec sharedInstance];
  ASSERT_TRUE([[codec encode:@""] isEqualTo:[NSData data]]);
  ASSERT_TRUE([[codec decode:[NSData data]] isEqualTo:@""]);
}
 
TEST(FlutterStringCodec, CanEncodeAndDecodeAsciiString) {
  NSString* value = @"hello world";
  FlutterStringCodec* codec = [FlutterStringCodec sharedInstance];
  NSData* encoded = [codec encode:value];
  NSString* decoded = [codec decode:encoded];
  ASSERT_TRUE([value isEqualTo:decoded]);
}
 
TEST(FlutterStringCodec, CanEncodeAndDecodeNonAsciiString) {
  NSString* value = @"hello \u263A world";
  FlutterStringCodec* codec = [FlutterStringCodec sharedInstance];
  NSData* encoded = [codec encode:value];
  NSString* decoded = [codec decode:encoded];
  ASSERT_TRUE([value isEqualTo:decoded]);
}
 
TEST(FlutterStringCodec, CanEncodeAndDecodeNonBMPString) {
  NSString* value = @"hello \U0001F602 world";
  FlutterStringCodec* codec = [FlutterStringCodec sharedInstance];
  NSData* encoded = [codec encode:value];
  NSString* decoded = [codec decode:encoded];
  ASSERT_TRUE([value isEqualTo:decoded]);
}
 
TEST(FlutterJSONCodec, ThrowsOnInvalidEncode) {
  NSString* value = [[NSString alloc] initWithBytes:"\xdf\xff"
                                             length:2
                                           encoding:NSUTF16StringEncoding];
  FlutterJSONMessageCodec* codec = [FlutterJSONMessageCodec sharedInstance];
  EXPECT_EXIT([codec encode:value], testing::KilledBySignal(SIGABRT), "failed to convert to UTF8");
}
 
TEST(FlutterJSONCodec, CanDecodeZeroLength) {
  FlutterJSONMessageCodec* codec = [FlutterJSONMessageCodec sharedInstance];
  ASSERT_TRUE([codec decode:[NSData data]] == nil);
}
 
TEST(FlutterJSONCodec, ThrowsOnInvalidDecode) {
  NSString* value = @"{{{";
  FlutterJSONMessageCodec* codec = [FlutterJSONMessageCodec sharedInstance];
  EXPECT_EXIT([codec decode:[value dataUsingEncoding:value.fastestEncoding]],
              testing::KilledBySignal(SIGABRT), "No string key for value in object around line 1");
}
 
TEST(FlutterJSONCodec, CanEncodeAndDecodeNil) {
  FlutterJSONMessageCodec* codec = [FlutterJSONMessageCodec sharedInstance];
  ASSERT_TRUE([codec encode:nil] == nil);
  ASSERT_TRUE([codec decode:nil] == nil);
}
 
TEST(FlutterJSONCodec, CanEncodeAndDecodeArray) {
  NSArray* value = @[ [NSNull null], @"hello", @3.14, @47, @{@"a" : @"nested"} ];
  FlutterJSONMessageCodec* codec = [FlutterJSONMessageCodec sharedInstance];
  NSData* encoded = [codec encode:value];
  NSArray* decoded = [codec decode:encoded];
  ASSERT_TRUE([value isEqualTo:decoded]);
}
 
TEST(FlutterJSONCodec, CanEncodeAndDecodeDictionary) {
  NSDictionary* value = @{@"a" : @3.14, @"b" : @47, @"c" : [NSNull null], @"d" : @[ @"nested" ]};
  FlutterJSONMessageCodec* codec = [FlutterJSONMessageCodec sharedInstance];
  NSData* encoded = [codec encode:value];
  NSDictionary* decoded = [codec decode:encoded];
  ASSERT_TRUE([value isEqualTo:decoded]);
}