tests are good

main_test.go

@@ -0,0 +1,80 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"path"
+	"strconv"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestRun(t *testing.T) {
+	targetCalls := 0
+	target := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		targetCalls += 1
+	}))
+	defer target.Close()
+
+	p := func() int {
+		s := httptest.NewServer(http.HandlerFunc(http.NotFound))
+		s.Close()
+		u := s.URL
+		ps := strings.Split(u, ":")[2]
+		n, err := strconv.Atoi(ps)
+		if err != nil {
+			t.Fatal(err)
+		}
+		return n
+	}()
+	tmpl := `{{ . }}`
+	x := fmt.Sprintf(`http://localhost:%d`, p)
+	y := target.URL
+	db := path.Join(t.TempDir(), "db")
+
+	do := func(method, body string) bool {
+		req, _ := http.NewRequest(method, x, strings.NewReader(body))
+		resp, err := httpc.Do(req)
+		if err != nil {
+			return false
+		}
+		resp.Body.Close()
+		return true
+	}
+
+	go func() {
+		if err := run(p, tmpl, y, db); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	for !do(http.MethodGet, "") {
+		time.Sleep(time.Millisecond * 100)
+	}
+
+	if targetCalls != 1 {
+		t.Error("empty req body no called target")
+	}
+
+	if !do(http.MethodGet, "") {
+		t.Error("couldnt get a second time with no body")
+	} else if targetCalls != 1 {
+		t.Error("no dedupe no body")
+	}
+
+	if !do(http.MethodPost, "1") {
+		t.Error("couldnt get a third time with new body")
+	} else if targetCalls != 2 {
+		t.Error("deduped new body")
+	} else if !do(http.MethodPost, "1") {
+		t.Error("couldnt get a fourth time with new body again")
+	} else if targetCalls != 2 {
+		t.Error("no deduped new body again")
+	} else if !do(http.MethodPost, "2") {
+		t.Error("couldnt get a fifth time with new new body")
+	} else if targetCalls != 3 {
+		t.Error("deduped new new body")
+	}
+}