Refactor Row tests to consider all rendered block content

The current tests only look at the `first` RenderBlockContentelement.
This is a refactor to support testing `@Small` which
can return multiple RenderBlockContent items.

Author: ethan-kusters

Tests/SwiftDocCTests/Semantics/RowTests.swift renamed to Tests/SwiftDocCTests/Semantics/Reference/RowTests.swift

@@ -29,8 +29,9 @@ class RowTests: XCTestCase {
             ["1: warning – org.swift.docc.HasAtLeastOne<Row, Column>"]
         )
 
+        XCTAssertEqual(renderBlockContent.count, 1)
         XCTAssertEqual(
-            renderBlockContent,
+            renderBlockContent.first,
             .row(.init(numberOfColumns: 0, columns: []))
         )
     }
@@ -65,8 +66,9 @@ class RowTests: XCTestCase {
                 ]
             )
 
+            XCTAssertEqual(renderBlockContent.count, 1)
             XCTAssertEqual(
-                renderBlockContent,
+                renderBlockContent.first,
                 .row(RenderBlockContent.Row(
                     numberOfColumns: 6,
                     columns: [
@@ -129,8 +131,9 @@ class RowTests: XCTestCase {
                 ]
             )
 
+            XCTAssertEqual(renderBlockContent.count, 1)
             XCTAssertEqual(
-                renderBlockContent,
+                renderBlockContent.first,
                 .row(RenderBlockContent.Row(
                     numberOfColumns: 0,
                     columns: []
@@ -159,8 +162,9 @@ class RowTests: XCTestCase {
                 ]
             )
 
+            XCTAssertEqual(renderBlockContent.count, 1)
             XCTAssertEqual(
-                renderBlockContent,
+                renderBlockContent.first,
                 .row(RenderBlockContent.Row(
                     numberOfColumns: 1,
                     columns: [
@@ -187,8 +191,9 @@ class RowTests: XCTestCase {
                 ]
             )
 
+            XCTAssertEqual(renderBlockContent.count, 1)
             XCTAssertEqual(
-                renderBlockContent,
+                renderBlockContent.first,
                 .row(RenderBlockContent.Row(numberOfColumns: 0, columns: []))
             )
         }
@@ -212,8 +217,9 @@ class RowTests: XCTestCase {
         XCTAssertNotNil(row)
         XCTAssertEqual(problems, [])
 
+        XCTAssertEqual(renderBlockContent.count, 1)
         XCTAssertEqual(
-            renderBlockContent,
+            renderBlockContent.first,
             .row(RenderBlockContent.Row(
                 numberOfColumns: 5,
                 columns: [
@@ -252,8 +258,9 @@ class RowTests: XCTestCase {
         XCTAssertNotNil(row)
         XCTAssertEqual(problems, [])
 
+        XCTAssertEqual(renderBlockContent.count, 1)
         XCTAssertEqual(
-            renderBlockContent,
+            renderBlockContent.first,
             .row(RenderBlockContent.Row(
                 numberOfColumns: 1,
                 columns: [

Tests/SwiftDocCTests/XCTestCase+LoadingTestData.swift

@@ -128,7 +128,7 @@ extension XCTestCase {
     func parseDirective<Directive: RenderableDirectiveConvertible>(
         _ directive: Directive.Type,
         source: () -> String
-    ) throws -> (renderBlockContent: RenderBlockContent?, problemIdentifiers: [String], directive: Directive?) {
+    ) throws -> (renderBlockContent: [RenderBlockContent], problemIdentifiers: [String], directive: Directive?) {
         let (bundle, context) = try testBundleAndContext()
 
         let document = Document(parsing: source(), options: .parseBlockDirectives)
@@ -145,7 +145,7 @@ extension XCTestCase {
         }.sorted()
 
         guard let directive = result as? Directive else {
-            return (nil, problemIDs, nil)
+            return ([], problemIDs, nil)
         }
 
         var contentCompiler = RenderContentCompiler(
@@ -158,7 +158,9 @@ extension XCTestCase {
             )
         )
 
-        let renderedContent = directive.render(with: &contentCompiler).first as? RenderBlockContent
+        let renderedContent = try XCTUnwrap(
+            directive.render(with: &contentCompiler) as? [RenderBlockContent]
+        )
         return (renderedContent, problemIDs, directive)
     }
 }