chore: add basic proxy test

proxy_test.go

@@ -0,0 +1,38 @@
+package proxy
+
+import (
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"github.com/pkg/errors"
+)
+
+func TestProxy(t *testing.T) {
+	res := httptest.NewRecorder()
+	req, err := http.NewRequest("GET", "http://example.com", nil)
+	if err != nil {
+		t.Fatalf("%+v", errors.WithStack(err))
+	}
+
+	proxy := New()
+
+	proxy.ServeHTTP(res, req)
+
+	if e, g := http.StatusOK, res.Code; e != g {
+		t.Errorf("res.Code: expected '%v', got '%v'", e, g)
+	}
+
+	body, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		t.Errorf("%+v", errors.WithStack(err))
+	}
+
+	marker := "<title>Example Domain</title>"
+
+	if !strings.Contains(string(body), marker) {
+		t.Errorf("could not find expected marker in response body")
+	}
+}