--- /dev/null
+var readInstalled = require('../read-installed.js')
+var test = require('tap').test
+var path = require('path')
+
+test('extraneous detected', function(t) {
+ // This test verifies read-installed#16
+ readInstalled(
+ path.join(__dirname, 'fixtures/extraneous-detected'),
+ { log: console.error },
+ function(err, map) {
+ t.ok(map.dependencies.foo.extraneous, 'foo is extraneous, it\'s not required by any module')
+ t.ok(map.dependencies.bar.extraneous, 'bar is extraneous, it\'s not required by any module')
+ t.notOk(map.dependencies.asdf.extraneous, 'asdf is not extraneous, it\'s required by ghjk')
+ t.notOk(map.dependencies.ghjk.extraneous, 'ghjk is not extraneous, it\'s required by our root module')
+ t.end()
+ })
+})