components/TextFields/tests/unit/TextFieldTypographyThemer.m

/*
 Copyright 2018-present the Material Components for iOS authors. All Rights Reserved.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

#import <XCTest/XCTest.h>

#import "MaterialTextFields.h"
#import "MaterialThemes.h"
#import "MaterialTextFields+TypographyThemer.h"

@interface MDCTextFieldTypographyThemer (ResetDefaults)

+ (void)resetDefaultsForClass:(Class<MDCTextInputController>)class;

@end

@implementation MDCTextFieldTypographyThemer (ResetDefaults)

// TODO: (larche) Drop this if defined and the pragmas when we drop Xcode 8 support.
// This is to silence a warning that doesn't appear in Xcode 9 when you use Class as an object.
#if !defined(__IPHONE_11_0)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wobjc-method-access"
#endif
+ (void)resetDefaultsForClass:(Class<MDCTextInputController>)textInputControllerClass {
  [textInputControllerClass setInlinePlaceholderFontDefault:nil];
  [textInputControllerClass setTrailingUnderlineLabelFontDefault:nil];
  [textInputControllerClass setLeadingUnderlineLabelFontDefault:nil];

  if ([textInputControllerClass
       conformsToProtocol:@protocol(MDCTextInputControllerFloatingPlaceholder)]) {
    Class<MDCTextInputControllerFloatingPlaceholder> textInputControllerFloatingPlaceholderClass =
        (Class<MDCTextInputControllerFloatingPlaceholder>)textInputControllerClass;
    [textInputControllerFloatingPlaceholderClass setFloatingPlaceholderScaleDefault:0];
  }
}
#if !defined(__IPHONE_11_0)
#pragma clang diagnostic pop
#endif

@end

@interface TextFieldTypographyThemer : XCTestCase

@end

@implementation TextFieldTypographyThemer

- (void)tearDown {
  [super tearDown];
  [MDCTextFieldTypographyThemer resetDefaultsForClass:[MDCTextInputControllerFullWidth class]];
  [MDCTextFieldTypographyThemer resetDefaultsForClass:[MDCTextInputControllerBase class]];
}

- (void)testTypographyThemerSetsTheFontsForTextFieldProperly {
  MDCTextField *textField = [[MDCTextField alloc] initWithFrame:CGRectZero];
  textField.font = [UIFont systemFontOfSize:28];
  textField.leadingUnderlineLabel.font = [UIFont systemFontOfSize:28];
  textField.trailingUnderlineLabel.font = [UIFont systemFontOfSize:28];
  textField.placeholderLabel.font = [UIFont systemFontOfSize:28];
  MDCTypographyScheme *typographyScheme = [[MDCTypographyScheme alloc] init];
  [MDCTextFieldTypographyThemer applyTypographyScheme:typographyScheme toTextInput:textField];
  XCTAssertEqualObjects(textField.leadingUnderlineLabel.font, typographyScheme.caption);
  XCTAssertEqualObjects(textField.trailingUnderlineLabel.font, typographyScheme.caption);
  XCTAssertEqualObjects(textField.placeholderLabel.font, typographyScheme.subtitle1);
  XCTAssertEqualObjects(textField.font, typographyScheme.subtitle1);
}

- (void)testTypographyThemerSetsTheFontsForTextInputControllerClass {
  MDCTypographyScheme *typographyScheme = [[MDCTypographyScheme alloc] init];
  [MDCTextFieldTypographyThemer applyTypographyScheme:typographyScheme
                     toAllTextInputControllersOfClass:[MDCTextInputControllerFullWidth class]];
  XCTAssertEqualObjects([MDCTextInputControllerFullWidth trailingUnderlineLabelFontDefault],
                        typographyScheme.caption);
  XCTAssertEqualObjects([MDCTextInputControllerFullWidth inlinePlaceholderFontDefault],
                        typographyScheme.subtitle1);
}

- (void)testTypographyThemerSetsTheFontsForTextInputControllerFloatingPlaceHolderClass {
  MDCTypographyScheme *typographyScheme = [[MDCTypographyScheme alloc] init];
  [MDCTextFieldTypographyThemer applyTypographyScheme:typographyScheme
                     toAllTextInputControllersOfClass:[MDCTextInputControllerBase class]];
  XCTAssertEqualObjects([MDCTextInputControllerBase trailingUnderlineLabelFontDefault],
                        typographyScheme.caption);
  XCTAssertEqualObjects([MDCTextInputControllerBase leadingUnderlineLabelFontDefault],
                        typographyScheme.caption);
  XCTAssertEqualObjects([MDCTextInputControllerBase inlinePlaceholderFontDefault],
                        typographyScheme.subtitle1);
  XCTAssertEqual([MDCTextInputControllerBase floatingPlaceholderScaleDefault],
                 typographyScheme.caption.pointSize/typographyScheme.subtitle1.pointSize);
}

- (void)testTypographyThemerSetsTheFontsForTextInputControllerInstance {
  MDCTextInputControllerFullWidth *inputController = [[MDCTextInputControllerFullWidth alloc] init];
  inputController.trailingUnderlineLabelFont = [UIFont systemFontOfSize:80];
  inputController.inlinePlaceholderFont = [UIFont systemFontOfSize:80];
  MDCTypographyScheme *typographyScheme = [[MDCTypographyScheme alloc] init];
  [MDCTextFieldTypographyThemer applyTypographyScheme:typographyScheme
                                toTextInputController:inputController];
  XCTAssertEqualObjects(inputController.trailingUnderlineLabelFont, typographyScheme.caption);
  XCTAssertEqualObjects(inputController.inlinePlaceholderFont, typographyScheme.subtitle1);
}

- (void)testTypographyThemerSetsTheFontsForTextInputControllerFloatingPlaceHolderInstance {
  MDCTextInputControllerBase *floatingInputController = [[MDCTextInputControllerBase alloc] init];
  floatingInputController.trailingUnderlineLabelFont = [UIFont systemFontOfSize:80];
  floatingInputController.leadingUnderlineLabelFont = [UIFont systemFontOfSize:80];
  floatingInputController.inlinePlaceholderFont = [UIFont systemFontOfSize:80];
  MDCTypographyScheme *typographyScheme = [[MDCTypographyScheme alloc] init];
  [MDCTextFieldTypographyThemer applyTypographyScheme:typographyScheme
                                toTextInputController:floatingInputController];
  XCTAssertEqualObjects(floatingInputController.trailingUnderlineLabelFont,
                        typographyScheme.caption);
  XCTAssertEqualObjects(floatingInputController.leadingUnderlineLabelFont,
                        typographyScheme.caption);
  XCTAssertEqualObjects(floatingInputController.inlinePlaceholderFont, typographyScheme.subtitle1);
  XCTAssertEqual([floatingInputController.floatingPlaceholderScale doubleValue],
                 typographyScheme.caption.pointSize/typographyScheme.subtitle1.pointSize);
}

@end