add vendoring with go dep

vendor/github.com/vmware/govmomi/govc/test/extension.bats

@@ -0,0 +1,75 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+@test "extension" {
+  vcsim_env
+
+  govc extension.info | grep Name: | grep govc-test | awk '{print $2}' | $xargs -r govc extension.unregister
+
+  run govc extension.info enoent
+  assert_failure
+
+  id=$(new_id)
+
+  result=$(govc extension.info | grep $id | wc -l)
+  [ $result -eq 0 ]
+
+  # register extension
+  run govc extension.register $id <<EOS
+  {
+    "Description": {
+      "Label": "govc",
+      "Summary": "Go interface to vCenter"
+    },
+    "Key": "${id}",
+    "Company": "VMware, Inc.",
+    "Version": "0.2.0"
+  }
+EOS
+  assert_success
+
+  # check info output is legit
+  run govc extension.info $id
+  assert_line "Name: $id"
+
+  json=$(govc extension.info -json $id)
+  label=$(jq -r .Extensions[].Description.Label <<<"$json")
+  assert_equal "govc" "$label"
+
+  # change label and update extension
+  json=$(jq -r '.Extensions[] | .Description.Label = "novc"' <<<"$json")
+  run govc extension.register -update $id <<<"$json"
+  assert_success
+
+  # check label changed in info output
+  json=$(govc extension.info -json $id)
+  label=$(jq -r .Extensions[].Description.Label <<<"$json")
+  assert_equal "novc" "$label"
+
+  # set extension certificate to generated certificate
+  run govc extension.setcert -cert-pem '+' $id
+  assert_success
+
+  # test client certificate authentication
+  (
+    # remove password from env, set user to extension id and turn of session cache
+    govc_url_to_vars
+    unset GOVC_PASSWORD
+    GOVC_USERNAME=$id
+    export GOVC_PERSIST_SESSION=false
+    # vagrant port forwards to VC's port 80
+    export GOVC_TUNNEL_PROXY_PORT=16080
+    run govc about -cert "${id}.crt" -key "${id}.key"
+    assert_success
+  )
+
+  # remove generated cert and key
+  rm ${id}.{crt,key}
+
+  run govc extension.unregister $id
+  assert_success
+
+  result=$(govc extension.info | grep $id | wc -l)
+  [ $result -eq 0 ]
+}