--- /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-dev-dep"),
+ {
+ log: console.error,
+ dev: true
+ },
+ function (err, map) {
+ t.ifError(err, "read-installed made it")
+
+ t.notOk(map.dependencies.d.extraneous, "d is not extraneous, it's required by root")
+ t.ok(map.dependencies.x.extraneous, "x is extraneous, it's only a dev dep of d")
+ t.end()
+ })
+})