148 lines
5.5 KiB
Objective-C
148 lines
5.5 KiB
Objective-C
//
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// JSONHelperTests.m
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// MonsterCardsTests
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//
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// Created by Tom Hicks on 9/15/20.
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// Copyright © 2020 Tom Hicks. All rights reserved.
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//
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#import <XCTest/XCTest.h>
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#import "JSONHelper.h"
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@interface JSONHelperTests : XCTestCase
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@end
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@implementation JSONHelperTests {
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NSString *_jsonStringKey;
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NSString *_jsonStringValue;
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NSString *_jsonStringFragment;
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NSString *_jsonIntegerKey;
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NSNumber *_jsonIntegerValue;
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NSString *_jsonIntegerFragment;
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}
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NSString* escapeStringForJSON(NSString *unescaped) {
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return [[unescaped stringByReplacingOccurrencesOfString:@"\\" withString:@"\\\\"] stringByReplacingOccurrencesOfString:@"\"" withString:@"\\\""];
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}
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NSDictionary* readJSONDictionaryFromString(NSString *jsonString) {
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NSData* jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
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NSDictionary *jsonRoot = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:nil];
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if (![jsonRoot isKindOfClass:[NSDictionary class]]) {
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return nil;
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} else {
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return jsonRoot;
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}
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}
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NSArray* readJSONArrayFromString(NSString *jsonString) {
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NSData* jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
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NSArray *jsonRoot = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:nil];
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if (![jsonRoot isKindOfClass:[NSArray class]]) {
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return nil;
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} else {
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return jsonRoot;
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}
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}
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- (void)setUp {
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_jsonStringKey = @"my_string";
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_jsonStringValue = @"Hello, World!";
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_jsonStringFragment = [NSString stringWithFormat:@"\"%@\":\"%@\"", escapeStringForJSON(_jsonStringKey), escapeStringForJSON(_jsonStringValue)];
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_jsonIntegerKey = @"my_int";
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_jsonIntegerValue = @12345;
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_jsonIntegerFragment = [NSString stringWithFormat:@"\"%@\":%@", escapeStringForJSON(_jsonIntegerKey), [_jsonIntegerValue stringValue]];
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}
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- (void)tearDown {
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}
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#pragma mark - Strings in Dictionaries
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- (void)testReadStringFromDictionaryReturnsNilIfKeyNotPresent {
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NSString *jsonString = [NSString stringWithFormat:@"{%@}", _jsonIntegerFragment];
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NSDictionary *jsonRoot = readJSONDictionaryFromString(jsonString);
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XCTAssertNotNil(jsonRoot);
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NSString *readString = [JSONHelper readStringFromDictionary:jsonRoot forKey:_jsonStringKey];
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XCTAssertNil(readString);
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}
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- (void)testReadStringFromDictionaryWithDefaultReturnsDefaultIfKeyNotPresent {
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NSString *jsonString = [NSString stringWithFormat:@"{%@}", _jsonIntegerFragment];
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NSDictionary *jsonRoot = readJSONDictionaryFromString(jsonString);
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XCTAssertNotNil(jsonRoot);
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NSString *readString = [JSONHelper readStringFromDictionary:jsonRoot forKey:_jsonStringKey withDefaultValue:_jsonStringValue];
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XCTAssertEqualObjects(_jsonStringValue, readString);
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}
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- (void) testReadStringFromDictionaryReturnsCorrectValue {
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NSString *jsonString = [NSString stringWithFormat:@"{%@}", _jsonStringFragment];
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NSDictionary *jsonRoot = readJSONDictionaryFromString(jsonString);
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XCTAssertNotNil(jsonRoot);
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NSString *readString = [JSONHelper readStringFromDictionary:jsonRoot forKey:_jsonStringKey];
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XCTAssertEqualObjects(_jsonStringValue, readString);
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}
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- (void)testReadStringFromDictionaryWithDefaultReturnsCorrectValue {
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NSString *jsonString = [NSString stringWithFormat:@"{%@}", _jsonStringFragment];
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NSDictionary *jsonRoot = readJSONDictionaryFromString(jsonString);
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XCTAssertNotNil(jsonRoot);
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NSString *readString = [JSONHelper readStringFromDictionary:jsonRoot forKey:_jsonStringKey withDefaultValue:@"Some other string"];
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XCTAssertEqualObjects(_jsonStringValue, readString);
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}
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- (void) testReadStringFromDictionaryReturnsNilIfWrongType {
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NSString *jsonString = [NSString stringWithFormat:@"{\"%@\":%@}", _jsonStringKey, _jsonIntegerValue];
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NSDictionary *jsonRoot = readJSONDictionaryFromString(jsonString);
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XCTAssertNotNil(jsonRoot);
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NSString *readString = [JSONHelper readStringFromDictionary:jsonRoot forKey:_jsonStringKey];
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XCTAssertNil(readString);
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}
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#pragma mark - Strings in Arrays
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- (void)testReadStringFromArrayReturnsNilIfNotAString {
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NSString *jsonString = [NSString stringWithFormat:@"[%@]", _jsonIntegerValue];
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NSArray *jsonRoot = readJSONArrayFromString(jsonString);
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XCTAssertNotNil(jsonRoot);
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NSString *readString = [JSONHelper readStringFromArray:jsonRoot forIndex:0];
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XCTAssertNil(readString);
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}
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- (void)testReadStringFromArrayWithDefaultReturnsDefaultValueIfNotAString {
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NSString *jsonString = [NSString stringWithFormat:@"[%@]", _jsonIntegerValue];
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NSArray *jsonRoot = readJSONArrayFromString(jsonString);
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XCTAssertNotNil(jsonRoot);
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NSString *readString = [JSONHelper readStringFromArray:jsonRoot forIndex:0 withDefaultValue:_jsonStringValue];
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XCTAssertEqualObjects(_jsonStringValue, readString);
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}
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- (void)testReadStringFromArrayThrowsIfIndexOutOfRange {
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// TODO: Decide if this should throw or return nil
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NSString *jsonString = @"[]";
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NSArray *jsonRoot = readJSONArrayFromString(jsonString);
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XCTAssertNotNil(jsonRoot);
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XCTAssertThrows([JSONHelper readStringFromArray:jsonRoot forIndex:0]);
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XCTAssertThrows([JSONHelper readStringFromArray:jsonRoot forIndex:-1]);
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}
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- (void)testReadStringFromArrayReturnsCorrectValue {
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NSString *jsonString = [NSString stringWithFormat:@"[\"%@\"]", _jsonStringValue];
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NSArray *jsonRoot = readJSONArrayFromString(jsonString);
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XCTAssertNotNil(jsonRoot);
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NSString *readString = [JSONHelper readStringFromArray:jsonRoot forIndex:0];
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XCTAssertEqualObjects(_jsonStringValue, readString);
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}
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@end
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