From 41f8a8cb002df7c79ffd264698c38d98dfe989e5 Mon Sep 17 00:00:00 2001
From: Vasiliy Tolstov <v.tolstov@unistack.org>
Date: Wed, 18 Mar 2020 03:10:38 +0300
Subject: [PATCH] errors: add FromError func (#1362)

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
---
 errors/errors.go      | 10 ++++++++++
 errors/errors_test.go | 14 ++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/errors/errors.go b/errors/errors.go
index 6c6598aa..70ffca9a 100644
--- a/errors/errors.go
+++ b/errors/errors.go
@@ -116,6 +116,7 @@ func InternalServerError(id, format string, a ...interface{}) error {
 	}
 }
 
+// Equal tries to compare errors
 func Equal(err1 error, err2 error) bool {
 	verr1, ok1 := err1.(*Error)
 	verr2, ok2 := err2.(*Error)
@@ -134,3 +135,12 @@ func Equal(err1 error, err2 error) bool {
 
 	return true
 }
+
+// FromError try to convert go error to *Error
+func FromError(err error) *Error {
+	if verr, ok := err.(*Error); ok && verr != nil {
+		return verr
+	}
+
+	return Parse(err.Error())
+}
diff --git a/errors/errors_test.go b/errors/errors_test.go
index 662dd8d0..44e72190 100644
--- a/errors/errors_test.go
+++ b/errors/errors_test.go
@@ -6,6 +6,20 @@ import (
 	"testing"
 )
 
+func TestFromError(t *testing.T) {
+	err := NotFound("go.micro.test", "%s", "example")
+	merr := FromError(err)
+	if merr.Id != "go.micro.test" || merr.Code != 404 {
+		t.Fatalf("invalid conversation %v != %v", err, merr)
+	}
+	err = er.New(err.Error())
+	merr = FromError(err)
+	if merr.Id != "go.micro.test" || merr.Code != 404 {
+		t.Fatalf("invalid conversation %v != %v", err, merr)
+	}
+
+}
+
 func TestEqual(t *testing.T) {
 	err1 := NotFound("myid1", "msg1")
 	err2 := NotFound("myid2", "msg2")