move matcher over, extract buffer method, example dsl

Author: schnittchen

spec/folding/basic_spec.rb

@@ -2,33 +2,16 @@
 
 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
+  def self.it_folds_lines(content, lines, tags = nil)
+    it("folds #{lines} lines on \n#{content}", tags) do
+      expect(content).to fold_lines(lines, tags)
     end
-    EOF
+  end
 
-    expect(content).to fold_lines(2)
+  it_folds_lines(<<~EOF, 2)
+  defmodule M do
   end
+  EOF
 end
 

spec/spec_helper.rb

@@ -61,6 +61,16 @@ def syntax(content, pattern)
     syngroups.gsub!(/["'\[\]]/, '').split(', ')
   end
 
+  def fold_and_delete(content)
+    with_file content do
+      @vim.command("set foldmethod=syntax")
+
+      @vim.normal("zO")
+      @vim.normal("zM")
+      @vim.normal("dd")
+    end
+  end
+
   private
 
   def with_file(content = nil)
@@ -193,6 +203,16 @@ def self.new
   end
 end
 
+RSpec::Matchers.define :fold_lines do |lines|
+  buffer = Buffer.new(VIM, :ex)
+
+  match do |code|
+    after = buffer.fold_and_delete(code)
+
+    code.lines.count - after.lines.count == lines
+  end
+end
+
 Vimrunner::RSpec.configure do |config|
   config.reuse_server = true