Add basic hare spec

Author: AndrewRadev

spec/plugin/hare_spec.rb

@@ -0,0 +1,22 @@
+require 'spec_helper'
+
+describe "hare" do
+  let(:filename) { 'test.ha' }
+
+  specify "question mark operator" do
+    set_file_contents <<~EOF
+      const num = getnumber()?;
+    EOF
+
+    vim.search('getnumber')
+    split
+
+    assert_file_contents <<~EOF
+      const num = match (getnumber()) {
+      case error => abort();
+      case let t: type =>
+      	yield t;
+      };
+    EOF
+  end
+end