unhandled error in hooks test (#2070)

* fix unhandled errors

* fix unhandled error in cache package test

* omit variable type

* omit variable type

* rename variable because collide with the imported package name

* handle file error on closing

* fix unhandled in common_linux.go

* fix unhandled errors in helpers_test.go

* fix unhandled errors in listen_test.go

* remove unused parameter in emptyHandler method

* refactor path.go

* unhandled error in hooks test

hooks_test.go

@@ -42,7 +42,8 @@ func Test_Hook_OnName(t *testing.T) {
 	defer bytebufferpool.Put(buf)
 
 	app.Hooks().OnName(func(r Route) error {
-		buf.WriteString(r.Name)
+		_, err := buf.WriteString(r.Name)
+		utils.AssertEqual(t, nil, err)
 
 		return nil
 	})
@@ -84,8 +85,8 @@ func Test_Hook_OnGroup(t *testing.T) {
 	defer bytebufferpool.Put(buf)
 
 	app.Hooks().OnGroup(func(g Group) error {
-		buf.WriteString(g.Prefix)
-
+		_, err := buf.WriteString(g.Prefix)
+		utils.AssertEqual(t, nil, err)
 		return nil
 	})
 
@@ -104,7 +105,8 @@ func Test_Hook_OnGroupName(t *testing.T) {
 	defer bytebufferpool.Put(buf)
 
 	app.Hooks().OnGroupName(func(g Group) error {
-		buf.WriteString(g.name)
+		_, err := buf.WriteString(g.name)
+		utils.AssertEqual(t, nil, err)
 
 		return nil
 	})
@@ -143,7 +145,8 @@ func Test_Hook_OnShutdown(t *testing.T) {
 	defer bytebufferpool.Put(buf)
 
 	app.Hooks().OnShutdown(func() error {
-		buf.WriteString("shutdowning")
+		_, err := buf.WriteString("shutdowning")
+		utils.AssertEqual(t, nil, err)
 
 		return nil
 	})
@@ -163,7 +166,8 @@ func Test_Hook_OnListen(t *testing.T) {
 	defer bytebufferpool.Put(buf)
 
 	app.Hooks().OnListen(func() error {
-		buf.WriteString("ready")
+		_, err := buf.WriteString("ready")
+		utils.AssertEqual(t, nil, err)
 
 		return nil
 	})

path.go

@@ -60,7 +60,7 @@ const (
 	paramConstraintDataSeparator byte = ','  // separator of datas of type constraint for a parameter
 )
 
-// parameter constraint types
+// TypeConstraint parameter constraint types
 type TypeConstraint int16
 
 type Constraint struct {
@@ -259,7 +259,7 @@ func (routeParser *routeParser) analyseParameterPart(pattern string) (string, *r
 	// Check has constraint
 	var constraints []*Constraint
 
-	if hasConstraint := (parameterConstraintStart != -1 && parameterConstraintEnd != -1); hasConstraint {
+	if hasConstraint := parameterConstraintStart != -1 && parameterConstraintEnd != -1; hasConstraint {
 		constraintString := pattern[parameterConstraintStart+1 : parameterConstraintEnd]
 		userConstraints := splitNonEscaped(constraintString, string(parameterConstraintSeparatorChars))
 		constraints = make([]*Constraint, 0, len(userConstraints))