Add additional testing for NSTextSelectionRect/NSTextPlaceholder.

rdar://127265259
https://bugs.webkit.org/show_bug.cgi?id=273461

Reviewed by Aditya Keerthi.

Additional testing of NSTextSelectionRect and the rect property
ensure that we implemented this correctly.

* Tools/TestWebKitAPI/Tests/WebKitCocoa/TextPlaceholderTests.mm:
(TEST(NSTextPlaceholder, InsertTextPlaceholder)):
(TEST(NSTextPlaceholder, InsertAndRemoveTextPlaceholderWithoutIncomingText)):
(TEST(NSTextPlaceholder, InsertAndRemoveTextPlaceholderWithIncomingText)):

Canonical link: https://commits.webkit.org/278301@main

Tools/TestWebKitAPI/Tests/WebKitCocoa/TextPlaceholderTests.mm

@@ -37,6 +37,16 @@
 
 #if PLATFORM(MAC)
 #import <pal/spi/mac/NSTextInputContextSPI.h>
+
+// FIXME: Remove this after rdar://126379463 lands
+@interface WKTextSelectionRect : NSObject
+
+@property (nonatomic, readonly) NSRect rect;
+@property (nonatomic, readonly) NSWritingDirection writingDirection;
+@property (nonatomic, readonly) BOOL isVertical;
+@property (nonatomic, readonly) NSAffineTransform *transform;
+
+@end
 #endif
 
 RetainPtr<WKWebView> createWebViewForNSTextPlaceholder()
@@ -55,6 +65,7 @@
     [(id<NSTextInputClient_Async_staging_126696059>)webView.get() insertTextPlaceholderWithSize:CGSizeMake(50, 100) completionHandler:^(NSTextPlaceholder * placeholder) {
         EXPECT_WK_STREQ("<div style=\"display: inline-block; vertical-align: top; visibility: hidden !important; width: 50px; height: 100px;\"></div>Test<script>document.body.focus()</script>", [webView stringByEvaluatingJavaScript:@"document.body.innerHTML"]);
         isDone = true;
+        EXPECT_TRUE(CGSizeEqualToSize([(WKTextSelectionRect *)[[placeholder rects] firstObject] rect].size, CGSizeMake(50, 100)));
     }];
     TestWebKitAPI::Util::run(&isDone);
 }
@@ -66,6 +77,7 @@
     __block bool isDone = false;
     [(id<NSTextInputClient_Async_staging_126696059>)webView.get() insertTextPlaceholderWithSize:CGSizeMake(50, 100) completionHandler:^(NSTextPlaceholder *placeholder) {
         EXPECT_WK_STREQ("<div style=\"display: inline-block; vertical-align: top; visibility: hidden !important; width: 50px; height: 100px;\"></div>Test<script>document.body.focus()</script>", [webView stringByEvaluatingJavaScript:@"document.body.innerHTML"]);
+        EXPECT_TRUE(CGSizeEqualToSize([(WKTextSelectionRect *)[[placeholder rects] firstObject] rect].size, CGSizeMake(50, 100)));
         [(id<NSTextInputClient_Async_staging_126696059>)webView.get() removeTextPlaceholder:placeholder willInsertText:NO completionHandler:^{
             EXPECT_WK_STREQ("Test<script>document.body.focus()</script>", [webView stringByEvaluatingJavaScript:@"document.body.innerHTML"]);
             isDone = true;
@@ -81,6 +93,7 @@
     __block bool isDone = false;
     [(id<NSTextInputClient_Async_staging_126696059>)webView.get() insertTextPlaceholderWithSize:CGSizeMake(50, 100) completionHandler:^(NSTextPlaceholder *placeholder) {
         EXPECT_WK_STREQ("<div style=\"display: inline-block; vertical-align: top; visibility: hidden !important; width: 50px; height: 100px;\"></div>Test<script>document.body.focus()</script>", [webView stringByEvaluatingJavaScript:@"document.body.innerHTML"]);
+        EXPECT_TRUE(CGSizeEqualToSize([(WKTextSelectionRect *)[[placeholder rects] firstObject] rect].size, CGSizeMake(50, 100)));
         [(id<NSTextInputClient_Async_staging_126696059>)webView.get() removeTextPlaceholder:placeholder willInsertText:YES completionHandler:^{
             EXPECT_WK_STREQ("Test<script>document.body.focus()</script>", [webView stringByEvaluatingJavaScript:@"document.body.innerHTML"]);
             isDone = true;