[TextFields] Add tests for preferredFont APIs. (material-components#8635

)

Adds tests to demonstrate that MDCTextField responds as expected to `-[UIFont
preferredFontForTextStyle:]` APIs.

Closes #8640

components/TextFields/tests/snapshot/MDCTextAreaOutlinedControllerPreferredFontAXXXLSnapshotTests.m

@@ -0,0 +1,83 @@
+// Copyright 2019-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 "supplemental/MDCAbstractTextFieldSnapshotTests.h"
+
+#import "MaterialTextFields.h"
+#import "supplemental/MDCTextFieldSnapshotTestsStrings.h"
+#import "supplemental/SnapshotFakeMDCMultilineTextField.h"
+
+@interface MDCTextAreaOutlinedControllerPreferredFontAXXXLSnapshotTestsFake
+    : SnapshotFakeMDCMultilineTextField
+@property(nonatomic, strong) UITraitCollection *traitCollectionOverride;
+@end
+
+@implementation MDCTextAreaOutlinedControllerPreferredFontAXXXLSnapshotTestsFake
+
+- (UITraitCollection *)traitCollection {
+  return self.traitCollectionOverride ?: [super traitCollection];
+}
+
+@end
+
+@interface MDCTextAreaOutlinedControllerPreferredFontAXXXLSnapshotTests
+    : MDCAbstractTextFieldSnapshotTests <MDCTextFieldSnapshotTestCaseHooking>
+
+@end
+
+@implementation MDCTextAreaOutlinedControllerPreferredFontAXXXLSnapshotTests
+
+- (void)setUp {
+  [super setUp];
+
+  // Uncomment below to recreate the golden images for all test methods. Add it to a test method to
+  // update only that golden image.
+  //  self.recordMode = YES;
+
+  // Skip empty tests since this is only testing Dynamic Type.
+  self.shouldExecuteEmptyTests = NO;
+
+  if (@available(iOS 11.0, *)) {
+    MDCTextAreaOutlinedControllerPreferredFontAXXXLSnapshotTestsFake *fakeTextField =
+        [[MDCTextAreaOutlinedControllerPreferredFontAXXXLSnapshotTestsFake alloc] init];
+    fakeTextField.traitCollectionOverride =
+        [UITraitCollection traitCollectionWithPreferredContentSizeCategory:
+                               UIContentSizeCategoryAccessibilityExtraExtraExtraLarge];
+    self.textField = fakeTextField;
+    self.textField.clearButtonMode = UITextFieldViewModeAlways;
+
+    MDCTextInputControllerOutlinedTextArea *controller =
+        [[MDCTextInputControllerOutlinedTextArea alloc] initWithTextInput:self.textField];
+    UIFontMetrics *bodyMetrics = [UIFontMetrics metricsForTextStyle:UIFontTextStyleBody];
+    controller.textInputFont = [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino"
+                                                                              size:20]];
+    controller.inlinePlaceholderFont =
+        [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino" size:20]];
+    controller.leadingUnderlineLabelFont =
+        [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino" size:20]];
+    controller.trailingUnderlineLabelFont =
+        [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino" size:20]];
+    self.textFieldController = controller;
+
+    ((id<UIContentSizeCategoryAdjusting>)self.textField).adjustsFontForContentSizeCategory = YES;
+  }
+}
+
+- (void)willGenerateSnapshotAndVerify {
+  [self.textField traitCollectionDidChange:nil];
+}
+
+// NOTE: Additional test methods can be found in MDCAbstractTextFieldSnapshotTests.m
+
+@end

components/TextFields/tests/snapshot/MDCTextAreaOutlinedControllerPreferredFontXSSnapshotTests.m

@@ -0,0 +1,82 @@
+// Copyright 2019-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 "supplemental/MDCAbstractTextFieldSnapshotTests.h"
+
+#import "MaterialTextFields.h"
+#import "supplemental/MDCTextFieldSnapshotTestsStrings.h"
+#import "supplemental/SnapshotFakeMDCMultilineTextField.h"
+
+@interface MDCTextAreaOutlinedControllerPreferredFontXSSnapshotTestsFake
+    : SnapshotFakeMDCMultilineTextField
+@property(nonatomic, strong) UITraitCollection *traitCollectionOverride;
+@end
+
+@implementation MDCTextAreaOutlinedControllerPreferredFontXSSnapshotTestsFake
+
+- (UITraitCollection *)traitCollection {
+  return self.traitCollectionOverride ?: [super traitCollection];
+}
+
+@end
+
+@interface MDCTextAreaOutlinedControllerPreferredFontXSSnapshotTests
+    : MDCAbstractTextFieldSnapshotTests <MDCTextFieldSnapshotTestCaseHooking>
+
+@end
+
+@implementation MDCTextAreaOutlinedControllerPreferredFontXSSnapshotTests
+
+- (void)setUp {
+  [super setUp];
+
+  // Uncomment below to recreate the golden images for all test methods. Add it to a test method to
+  // update only that golden image.
+  //  self.recordMode = YES;
+
+  // Skip empty tests since this is only testing Dynamic Type.
+  self.shouldExecuteEmptyTests = NO;
+
+  if (@available(iOS 11.0, *)) {
+    MDCTextAreaOutlinedControllerPreferredFontXSSnapshotTestsFake *fakeTextField =
+        [[MDCTextAreaOutlinedControllerPreferredFontXSSnapshotTestsFake alloc] init];
+    fakeTextField.traitCollectionOverride = [UITraitCollection
+        traitCollectionWithPreferredContentSizeCategory:UIContentSizeCategoryExtraSmall];
+    self.textField = fakeTextField;
+    self.textField.clearButtonMode = UITextFieldViewModeAlways;
+
+    MDCTextInputControllerOutlinedTextArea *controller =
+        [[MDCTextInputControllerOutlinedTextArea alloc] initWithTextInput:self.textField];
+    UIFontMetrics *bodyMetrics = [UIFontMetrics metricsForTextStyle:UIFontTextStyleBody];
+    controller.textInputFont = [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino"
+                                                                              size:20]];
+    controller.inlinePlaceholderFont =
+        [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino" size:20]];
+    controller.leadingUnderlineLabelFont =
+        [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino" size:20]];
+    controller.trailingUnderlineLabelFont =
+        [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino" size:20]];
+    self.textFieldController = controller;
+
+    ((id<UIContentSizeCategoryAdjusting>)self.textField).adjustsFontForContentSizeCategory = YES;
+  }
+}
+
+- (void)willGenerateSnapshotAndVerify {
+  [self.textField traitCollectionDidChange:nil];
+}
+
+// NOTE: Additional test methods can be found in MDCAbstractTextFieldSnapshotTests.m
+
+@end

components/TextFields/tests/snapshot/MDCTextFieldFilledControllerPreferredFontAXXXLSnapshotTests.m

@@ -0,0 +1,82 @@
+// Copyright 2019-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 "supplemental/MDCAbstractTextFieldSnapshotTests.h"
+
+#import "MaterialTextFields.h"
+#import "supplemental/MDCTextFieldSnapshotTestsStrings.h"
+#import "supplemental/SnapshotFakeMDCTextField.h"
+
+@interface MDCTextFieldFilledControllerPreferredFontXSSnapshotTestsFake : SnapshotFakeMDCTextField
+@property(nonatomic, strong) UITraitCollection *traitCollectionOverride;
+@end
+
+@implementation MDCTextFieldFilledControllerPreferredFontXSSnapshotTestsFake
+
+- (UITraitCollection *)traitCollection {
+  return self.traitCollectionOverride ?: [super traitCollection];
+}
+
+@end
+
+@interface MDCTextFieldFilledControllerPreferredFontXSSnapshotTests
+    : MDCAbstractTextFieldSnapshotTests <MDCTextFieldSnapshotTestCaseHooking>
+
+@end
+
+@implementation MDCTextFieldFilledControllerPreferredFontXSSnapshotTests
+
+- (void)setUp {
+  [super setUp];
+
+  // Uncomment below to recreate the golden images for all test methods. Add it to a test method to
+  // update only that golden image.
+  //  self.recordMode = YES;
+
+  // Skip empty tests since this is only testing Dynamic Type.
+  self.shouldExecuteEmptyTests = NO;
+
+  if (@available(iOS 11.0, *)) {
+    MDCTextFieldFilledControllerPreferredFontXSSnapshotTestsFake *fakeTextField =
+        [[MDCTextFieldFilledControllerPreferredFontXSSnapshotTestsFake alloc] init];
+    fakeTextField.traitCollectionOverride = [UITraitCollection
+        traitCollectionWithPreferredContentSizeCategory:UIContentSizeCategoryExtraSmall];
+    self.textField = fakeTextField;
+    self.textField.clearButtonMode = UITextFieldViewModeAlways;
+
+    MDCTextInputControllerFilled *controller =
+        [[MDCTextInputControllerFilled alloc] initWithTextInput:self.textField];
+    UIFontMetrics *bodyMetrics = [UIFontMetrics metricsForTextStyle:UIFontTextStyleBody];
+    controller.textInputFont = [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino"
+                                                                              size:20]];
+    controller.inlinePlaceholderFont =
+        [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino" size:20]];
+    controller.leadingUnderlineLabelFont =
+        [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino" size:20]];
+    controller.trailingUnderlineLabelFont =
+        [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino" size:20]];
+    controller.floatingEnabled = YES;
+    self.textFieldController = controller;
+
+    ((id<UIContentSizeCategoryAdjusting>)self.textField).adjustsFontForContentSizeCategory = YES;
+  }
+}
+
+- (void)willGenerateSnapshotAndVerify {
+  [self.textField traitCollectionDidChange:nil];
+}
+
+// NOTE: Additional test methods can be found in MDCAbstractTextFieldSnapshotTests.m
+
+@end

components/TextFields/tests/snapshot/MDCTextFieldFilledControllerPreferredFontXSSnapshotTests.m

@@ -0,0 +1,90 @@
+// Copyright 2019-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 "supplemental/MDCAbstractTextFieldSnapshotTests.h"
+
+#import "MaterialTextFields.h"
+#import "supplemental/MDCTextFieldSnapshotTestsStrings.h"
+#import "supplemental/SnapshotFakeMDCTextField.h"
+
+@interface MDCTextFieldFilledControllerPreferredFontAXXXLSnapshotTestsFake
+    : SnapshotFakeMDCTextField
+@property(nonatomic, strong) UITraitCollection *traitCollectionOverride;
+@end
+
+@implementation MDCTextFieldFilledControllerPreferredFontAXXXLSnapshotTestsFake
+
+- (UITraitCollection *)traitCollection {
+  return self.traitCollectionOverride ?: [super traitCollection];
+}
+
+@end
+
+@interface MDCTextFieldFilledControllerPreferredFontAXXXLSnapshotTests
+    : MDCAbstractTextFieldSnapshotTests <MDCTextFieldSnapshotTestCaseHooking>
+
+@end
+
+@implementation MDCTextFieldFilledControllerPreferredFontAXXXLSnapshotTests
+
+- (void)setUp {
+  [super setUp];
+
+  // Uncomment below to recreate the golden images for all test methods. Add it to a test method to
+  // update only that golden image.
+  //  self.recordMode = YES;
+
+  // Skip empty tests since this is only testing Dynamic Type.
+  self.shouldExecuteEmptyTests = NO;
+
+  if (@available(iOS 11.0, *)) {
+    MDCTextFieldFilledControllerPreferredFontAXXXLSnapshotTestsFake *fakeTextField =
+        [[MDCTextFieldFilledControllerPreferredFontAXXXLSnapshotTestsFake alloc] init];
+    fakeTextField.traitCollectionOverride =
+        [UITraitCollection traitCollectionWithPreferredContentSizeCategory:
+                               UIContentSizeCategoryAccessibilityExtraExtraExtraLarge];
+    self.textField = fakeTextField;
+    self.textField.clearButtonMode = UITextFieldViewModeAlways;
+
+    MDCTextInputControllerFilled *controller =
+        [[MDCTextInputControllerFilled alloc] initWithTextInput:self.textField];
+    UIFontMetrics *bodyMetrics = [UIFontMetrics metricsForTextStyle:UIFontTextStyleBody];
+    controller.textInputFont = [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino"
+                                                                              size:20]];
+    controller.inlinePlaceholderFont =
+        [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino" size:20]];
+    controller.leadingUnderlineLabelFont =
+        [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino" size:20]];
+    controller.trailingUnderlineLabelFont =
+        [bodyMetrics scaledFontForFont:[UIFont fontWithName:@"Zapfino" size:20]];
+    controller.floatingEnabled = YES;
+    self.textFieldController = controller;
+    UITextField *textField = [[UITextField alloc] init];
+    textField.font = [UIFont preferredFontForTextStyle:UIFontTextStyleBody];
+    NSLog(@"%d", textField.adjustsFontForContentSizeCategory);
+    UILabel *label = [[UILabel alloc] init];
+    label.font = [UIFont preferredFontForTextStyle:UIFontTextStyleBody];
+    NSLog(@"%d", label.adjustsFontForContentSizeCategory);
+
+    ((id<UIContentSizeCategoryAdjusting>)self.textField).adjustsFontForContentSizeCategory = YES;
+  }
+}
+
+- (void)willGenerateSnapshotAndVerify {
+  [self.textField traitCollectionDidChange:nil];
+}
+
+// NOTE: Additional test methods can be found in MDCAbstractTextFieldSnapshotTests.m
+
+@end