Avoid polluting the user's Bash-it installation

All of the install steps are done in a test directory

test/lib/search.bats

@@ -1,5 +1,7 @@
 #!/usr/bin/env bats
 
+load ../test_helper
+
 load ../../lib/composure
 load ../../plugins/available/base.plugin
 
@@ -10,6 +12,12 @@ load ../../lib/search
 
 NO_COLOR=true
 
+function local_setup {
+  mkdir -p $BASH_IT
+  lib_directory="$(cd "$(dirname "$0")" && pwd)"
+  cp -r $lib_directory/../../* $BASH_IT/
+}
+
 @test "helpers search aliases" {
   run _bash-it-search-component 'plugins' 'base'
   [[ "${lines[0]}" =~ 'plugins' && "${lines[0]}" =~ 'base' ]]