Re-vendor queue-worker publisher for reconnect

- re-vendor queue-worker for publisher via 0.6.0
- bump queue-worker version to 0.6.0 in docker-compose.yml for
AMD64
- use new naming for NATS of nats -> NATS in variables where
required
- add default reconnect of 60 times, 2 seconds apart.

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

gateway/vendor/github.com/openfaas/faas-provider/proxy/handler_test.go

@@ -0,0 +1,134 @@
+package proxy
+
+import (
+	"bytes"
+	"errors"
+	"log"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/gorilla/mux"
+)
+
+type testBaseURLResolver struct {
+	testServerBase string
+	err            error
+}
+
+func (tr *testBaseURLResolver) Resolve(name string) (url.URL, error) {
+	if tr.err != nil {
+		return url.URL{}, tr.err
+	}
+
+	return url.URL{
+		Scheme: "http",
+		Host:   tr.testServerBase,
+	}, nil
+}
+func Test_NewHandlerFunc_Panic(t *testing.T) {
+	defer func() {
+		if r := recover(); r == nil {
+			t.Errorf("should panic if resolver is nil")
+		}
+	}()
+
+	NewHandlerFunc(time.Second, nil)
+}
+
+func Test_NewHandlerFunc_NoPanic(t *testing.T) {
+	defer func() {
+		if r := recover(); r != nil {
+			t.Errorf("should not panic if resolver is not nil")
+		}
+	}()
+
+	proxyFunc := NewHandlerFunc(time.Second, &testBaseURLResolver{})
+	if proxyFunc == nil {
+		t.Errorf("proxy handler func is nil")
+	}
+}
+
+func Test_ProxyHandler_NonAllowedMethods(t *testing.T) {
+
+	proxyFunc := NewHandlerFunc(time.Second, &testBaseURLResolver{})
+
+	nonAllowedMethods := []string{
+		http.MethodHead, http.MethodConnect, http.MethodOptions, http.MethodTrace,
+	}
+
+	for _, method := range nonAllowedMethods {
+		t.Run(method+" method is not allowed", func(t *testing.T) {
+			w := httptest.NewRecorder()
+			req := httptest.NewRequest(method, "http://example.com/foo", nil)
+			proxyFunc(w, req)
+			resp := w.Result()
+			if resp.StatusCode != http.StatusMethodNotAllowed {
+				t.Errorf("expected status code `%d`, got `%d`", http.StatusMethodNotAllowed, resp.StatusCode)
+			}
+		})
+	}
+}
+
+func Test_ProxyHandler_MissingFunctionNameError(t *testing.T) {
+	proxyFunc := NewHandlerFunc(time.Second, &testBaseURLResolver{"", nil})
+
+	w := httptest.NewRecorder()
+	req := httptest.NewRequest("GET", "http://example.com/foo", nil)
+	req = mux.SetURLVars(req, map[string]string{"name": ""})
+
+	proxyFunc(w, req)
+
+	if w.Code != http.StatusBadRequest {
+		t.Errorf("expected status code `%d`, got `%d`", http.StatusBadRequest, w.Code)
+	}
+
+	respBody := w.Body.String()
+	if respBody != errMissingFunctionName {
+		t.Errorf("expected error message `%s`, got `%s`", errMissingFunctionName, respBody)
+	}
+}
+
+func Test_ProxyHandler_ResolveError(t *testing.T) {
+	logs := &bytes.Buffer{}
+	log.SetOutput(logs)
+
+	resolveErr := errors.New("can not find test service `foo`")
+	proxyFunc := NewHandlerFunc(time.Second, &testBaseURLResolver{"", resolveErr})
+
+	w := httptest.NewRecorder()
+	req := httptest.NewRequest("GET", "http://example.com/foo", nil)
+	req = mux.SetURLVars(req, map[string]string{"name": "foo"})
+
+	proxyFunc(w, req)
+
+	if w.Code != http.StatusNotFound {
+		t.Errorf("expected status code `%d`, got `%d`", http.StatusBadRequest, w.Code)
+	}
+
+	respBody := w.Body.String()
+	if respBody != "Cannot find service: foo." {
+		t.Errorf("expected error message `%s`, got `%s`", "Cannot find service: foo.", respBody)
+	}
+
+	if !strings.Contains(logs.String(), resolveErr.Error()) {
+		t.Errorf("expected logs to contain `%s`", resolveErr.Error())
+	}
+}
+
+func Test_ProxyHandler_Proxy_Success(t *testing.T) {
+	t.Skip("Test not implemented yet")
+	// testFuncService := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+	// 	w.WriteHeader(http.StatusOK)
+	// }))
+	// proxyFunc := NewHandlerFunc(time.Second, &testBaseURLResolver{testFuncService.URL, nil})
+
+	// w := httptest.NewRecorder()
+	// req := httptest.NewRequest("GET", "http://example.com/foo", nil)
+	// req = mux.SetURLVars(req, map[string]string{"name": "foo"})
+
+	// proxyFunc(w, req)
+}