Fix type assertions in FormatNumberShort

pkg/templates/error_pages.go

@@ -2,6 +2,8 @@ package templates
 
 import (
 	"net/http"
+
+	"code.nonshy.com/nonshy/website/pkg/log"
 )
 
 // NotFoundPage is an HTTP handler for 404 pages.
@@ -15,7 +17,11 @@ var ForbiddenPage = func() http.HandlerFunc {
 }()
 
 func MakeErrorPage(header string, message string, statusCode int) http.HandlerFunc {
-	tmpl := Must("errors/error.html")
+	tmpl, err := LoadTemplate("errors/error.html")
+	if err != nil {
+		log.Error("MakeErrorPage(%s): %s", header, err)
+		return nil
+	}
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(statusCode)
 		if err := tmpl.Execute(w, r, map[string]interface{}{

pkg/templates/template_funcs.go

@@ -114,9 +114,19 @@ func SincePrettyCoarse() func(time.Time) template.HTML {
 func FormatNumberShort() func(v interface{}) template.HTML {
 	return func(v interface{}) template.HTML {
 		var number int64
-		switch v.(type) {
+		switch t := v.(type) {
-		case int, int64, uint, uint64:
+		case int:
-			number = v.(int64)
+			number = int64(t)
+		case int64:
+			number = int64(t)
+		case uint:
+			number = int64(t)
+		case uint64:
+			number = int64(t)
+		case float32:
+			number = int64(t)
+		case float64:
+			number = int64(t)
 		default:
 			return template.HTML("#INVALID#")
 		}

pkg/templates/templates_test.go

@@ -0,0 +1,33 @@
+package templates_test
+
+import (
+	"html/template"
+	"testing"
+
+	"code.nonshy.com/nonshy/website/pkg/templates"
+)
+
+func TestNumberF(t *testing.T) {
+	// The underlying utility.FormatNumberShort already has thorough tests,
+	// this one will test the interface{} type conversions.
+	var tests = []struct {
+		In     interface{}
+		Expect template.HTML
+	}{
+		{int(0), "0"},
+		{int64(0), "0"},
+		{uint64(0), "0"},
+		{uint(0), "0"},
+		{int(123), "123"},
+		{int64(123), "123"},
+		{uint64(123), "123"},
+		{uint(123), "123"},
+	}
+
+	for _, test := range tests {
+		actual := templates.FormatNumberShort()(test.In)
+		if actual != test.Expect {
+			t.Errorf("Expected %d to be '%s' but got '%s'", test.In, test.Expect, actual)
+		}
+	}
+}