#4134. Add/update tests regarding whitespaces and interrupting lines

test/documentation_comment_test.dart

@@ -82,19 +82,15 @@ Text.
 More text.'''));
   }
 
+  /// Check that the parser removes the three slashes and all leading whitespaces
   void test_removesSpaceAfterTripleSlashes() async {
     await writePackageWithCommentedLibrary('''
 ///  Text.
 ///    More text.
 ''');
-    var doc = libraryModel.documentation;
-
-    // TODO(srawlins): Actually, the three spaces before 'More' is perhaps not
-    // the best fit. Should it only be two, to match the indent from the first
-    // line's "Text"?
-    expect(doc, equals('''
+    expect(libraryModel.documentation, equals('''
 Text.
-   More text.'''));
+More text.'''));
   }
 
   void test_leavesBlankLines() async {
@@ -111,6 +107,98 @@ Text.
 More text.'''));
   }
 
+  /// Check that interrupting blank lines and starting with `// ` are ignored.
+  void test_interruptingLinesIgnored() async {
+    await writePackageWithCommentedLibrary('''
+/// Text.
+//
+/// More text.
+// Some text
+/// And more text.
+
+/// And more.
+''');
+    expect(libraryModel.documentation, equals('''
+Text.
+More text.
+And more text.
+And more.'''));
+  }
+
+  /// Check that the doc comment starts after `///` even there is no trailing
+  /// whitespace.
+  void test_noTrailingWhitespace() async {
+    await writePackageWithCommentedLibrary('''
+//// Text.
+/////More text.
+///And more.
+''');
+    expect(libraryModel.documentation, equals('''
+/ Text.
+//More text.
+And more.'''));
+  }
+
+  /// Check that inside fenced code blocks (```), whitespaces after the leading
+  /// `///` are preserved
+  void test_whitespacesInBacktickCodeBlocks() async {
+    await writePackageWithCommentedLibrary('''
+/// ```
+/// void main() {
+///   /// This line prints "Hello, world!"
+///   print('Hello, world!');
+/// }
+/// ```
+''');
+    expect(libraryModel.documentation, equals('''
+```
+void main() {
+  /// This line prints "Hello, world!"
+  print('Hello, world!');
+}
+```'''));
+  }
+
+  /// Check that inside fenced code blocks (~~~), whitespaces after the leading
+  /// `///` are preserved
+  void test_whitespacesInTildesCodeBlocks() async {
+    await writePackageWithCommentedLibrary('''
+/// ~~~
+/// void main() {
+///   /// This line prints "Hello, world!"
+///   print('Hello, world!');
+/// }
+/// ~~~
+''');
+    expect(libraryModel.documentation, equals('''
+~~~
+void main() {
+  /// This line prints "Hello, world!"
+  print('Hello, world!');
+}
+~~~'''));
+  }
+
+  /// Check that inside fenced code span (`), whitespaces after the leading
+  /// `///` are removed.
+  void test_whitespacesInCodeSpan() async {
+    await writePackageWithCommentedLibrary('''
+/// `
+/// void main() {
+///   /// This line prints "Hello, world!"
+///   print('Hello, world!');
+/// }
+/// `
+''');
+    expect(libraryModel.documentation, equals('''
+`
+void main() {
+/// This line prints "Hello, world!"
+print('Hello, world!');
+}
+`'''));
+  }
+
   void test_processesAnimationDirective() async {
     await writePackageWithCommentedLibrary('''
 /// Text.