Change testing directory structure

tests/expect_successful_plugin_download

@@ -0,0 +1,35 @@
+#!/usr/bin/env expect
+
+# disables script output
+log_user 0
+
+spawn tmux
+
+# Waiting for tmux to attach. If this is not done, next command, `send` will
+# not work properly.
+sleep 1
+
+# this is tmux prefix + I
+send "I"
+
+# cloning might take a while
+set timeout 15
+
+expect {
+  "Downloading bruno-/tmux_example_plugin" {
+
+    expect {
+      "bruno-/tmux_example_plugin download success" {
+
+        expect { "Done, press ENTER to continue" { exit } }
+
+      }
+    }
+
+  }
+
+  timeout {
+    puts "Plugin update timeout";
+    exit 1
+  }
+}