1 files changed, 27 insertions, 0 deletions
diff --git a/test/prism/heredoc_dedent_test.rb b/test/prism/heredoc_dedent_test.rb
new file mode 100644
index 0000000000..9fbc4d936a
--- /dev/null
+++ b/test/prism/heredoc_dedent_test.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require_relative "test_helper"
+
+module Prism
+  class HeredocDedentTest < TestCase
+    filepath = File.expand_path("fixtures/tilde_heredocs.txt", __dir__)
+
+    File.read(filepath).split(/(?=\n)\n(?=<)/).each_with_index do |heredoc, index|
+      # The first example in this file has incorrect dedent calculated by
+      # TruffleRuby so we skip it.
+      next if index == 0 && RUBY_ENGINE == "truffleruby"
+
+      define_method "test_heredoc_#{index}" do
+        node = Prism.parse(heredoc).value.statements.body.first
+
+        if node.is_a?(StringNode)
+          actual = node.unescaped
+        else
+          actual = node.parts.map { |part| part.is_a?(StringNode) ? part.unescaped : "1" }.join
+        end
+
+        assert_equal(eval(heredoc), actual, "Expected heredocs to match.")
+      end
+    end
+  end
+end