Format empty html-tags on one line if possible (#42)

Author: davidwessman

CHANGELOG.md

@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) a
 
 ## [Unreleased]
 
+## [0.9.3] - 2023-06-30
+
+- Print empty html-tags on one line if possible
+
 ## [0.9.2] - 2023-06-30
 
 - Handle whitespace in HTML-strings using ERB-tags

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    w_syntax_tree-erb (0.9.2)
+    w_syntax_tree-erb (0.9.3)
       prettier_print (>= 1.2.0)
       syntax_tree (>= 6.1.1)
 

lib/syntax_tree/erb/format.rb

@@ -49,7 +49,12 @@ def visit_block(node)
       end
 
       def visit_html(node)
-        visit_block(node)
+        # Make sure to group the tags together if there is no child nodes.
+        if node.elements.size == 0
+          q.group { visit_block(node) }
+        else
+          visit_block(node)
+        end
       end
 
       def visit_erb_block(node)

lib/syntax_tree/erb/version.rb

@@ -2,6 +2,6 @@
 
 module SyntaxTree
   module ERB
-    VERSION = "0.9.2"
+    VERSION = "0.9.3"
   end
 end

test/fixture/erb_syntax_formatted.html.erb

@@ -42,5 +42,4 @@
   assign_c ||= "c"
 %>
 
-<div class="card mb-2 <%= condition ? "pb-3" : "pb-0" %> mt-<%= 5 * 5 %>">
-</div>
+<div class="card mb-2 <%= condition ? "pb-3" : "pb-0" %> mt-<%= 5 * 5 %>"></div>

test/html_test.rb

@@ -89,5 +89,13 @@ def test_html_attribute_without_quotes
       formatted = ERB.format(source)
       assert_equal("<div class=\"card\">\n  Hello World\n</div>\n", formatted)
     end
+
+    def test_html_attribute_without_content
+      source = "<component-without-content>\n</component-without-content>\n"
+      expected = "<component-without-content></component-without-content>\n"
+
+      formatted = ERB.format(source)
+      assert_equal(expected, formatted)
+    end
   end
 end