add test harness web server

* plus "make autotest" runs "make test" once first
* add .hgignore

.hgignore

@@ -0,0 +1,2 @@
+syntax: glob
+.vendor/bin

Makefile

@@ -33,7 +33,7 @@ vet:
 test:
 	go test ./src/...
 
-autotest:
+autotest: test
 	fswatch -or ./src | xargs -n1 -I{} go test ./src/...
 
 run: build

src/docrawler/docrawler_test.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"net"
+	"net/http"
+	"os"
+	"testing"
+)
+
+func TestMain(m *testing.M) {
+	// start our simple web server
+	l, err := net.Listen("tcp", ":8765")
+	if err != nil {
+		panic("unable to listen on port 8765") // TODO remove panic?
+	}
+	http.Handle("/", http.FileServer(http.Dir("./testsite")))
+	go func() {
+		err = http.Serve(l, nil)
+		if err != nil {
+			panic("unable to start http server") // TODO remove panic?
+		}
+	}()
+
+	// run tests
+	exitcode := m.Run()
+
+	// tear down web server
+	l.Close()
+
+	// tell OS our result
+	os.Exit(exitcode)
+}
+
+func TestServerRunning(t *testing.T) {
+	resp, err := http.Get("http://localhost:8765/")
+	if resp.StatusCode != 200 || err != nil {
+		t.Error(err)
+	}
+}