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node_modules/react-native/React/Tests/Text/RCTTextAttributesTest.mm

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+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <Foundation/Foundation.h>
+#import <XCTest/XCTest.h>
+
+#import <React/RCTTextAttributes.h>
+
+@interface RCTTextAttributesTest : XCTestCase
+
+@end
+
+@implementation RCTTextAttributesTest
+
+- (void)testCapitalize
+{
+  RCTTextAttributes *attrs = [RCTTextAttributes new];
+  attrs.textTransform = RCTTextTransformCapitalize;
+
+  NSString *input = @"hello WORLD from ReAcT nAtIvE 2a !b c";
+  NSString *output = @"Hello WORLD From ReAcT NAtIvE 2a !B C";
+  XCTAssertEqualObjects([attrs applyTextAttributesToText:input], output);
+}
+
+- (void)testUppercase
+{
+  RCTTextAttributes *attrs = [RCTTextAttributes new];
+  attrs.textTransform = RCTTextTransformUppercase;
+
+  NSString *input = @"hello WORLD from ReAcT nAtIvE 2a !b c";
+  NSString *output = @"HELLO WORLD FROM REACT NATIVE 2A !B C";
+  XCTAssertEqualObjects([attrs applyTextAttributesToText:input], output);
+}
+
+- (void)testLowercase
+{
+  RCTTextAttributes *attrs = [RCTTextAttributes new];
+  attrs.textTransform = RCTTextTransformLowercase;
+
+  NSString *input = @"hello WORLD from ReAcT nAtIvE 2a !b c";
+  NSString *output = @"hello world from react native 2a !b c";
+  XCTAssertEqualObjects([attrs applyTextAttributesToText:input], output);
+}
+
+@end