basic folding test

Author: schnittchen

spec/folding/basic_spec.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec::Matchers.define :fold_lines do |lines|
+  file = ".fixture.ex"
+
+
+  match do |code|
+    File.write(file, code)
+    VIM.edit file
+    VIM.command("set foldmethod=syntax")
+
+    VIM.normal("zO")
+    VIM.normal("zM")
+    VIM.normal("dd")
+    VIM.write
+
+    written = IO.read(file)
+    code.lines.count - written.lines.count == lines
+  end
+end
+
+describe 'Basic folding' do
+  it 'blah' do
+    content = <<~EOF
+    defmodule M do
+    end
+    EOF
+
+    expect(content).to fold_lines(2)
+  end
+end
+