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errtrace_test.go
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errtrace_test.go
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/*
Copyright 2016 Michal Junák
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package errtrace
import (
"strings"
"testing"
)
var testInputsForNew = []string{
"Short error text",
"",
"A little bit \n longer text \t\t\t containing escape \n sequences.",
}
var testInputsForNewf = []struct {
inputFmt string
fmtArgs []interface{}
expectedOutput string
}{
{"Formatted %s message %d!", []interface{}{"error", 5}, "Formatted error message 5!"},
{"", []interface{}{}, ""},
{"%s%s %d%s", []interface{}{"A", "B", 1, "C"}, "AB 1C"},
}
func TestNew(t *testing.T) {
for _, errMsg := range testInputsForNew {
err := New(errMsg)
if !strings.Contains(err.Error(), errMsg) {
t.Errorf("Error does not contain original error message.\nOriginal message: %s\nError: %v", errMsg, err)
}
if !containsStackTrace(err) {
t.Error("Error does not contain stack trace.\nError:", err)
}
}
}
func TestNewf(t *testing.T) {
for _, testArgs := range testInputsForNewf {
err := Newf(testArgs.inputFmt, testArgs.fmtArgs...)
if !strings.Contains(err.Error(), testArgs.expectedOutput) {
t.Errorf("Error does not contain original error message.\nOriginal message: %s\nError: %v", testArgs.expectedOutput, err)
}
if !containsStackTrace(err) {
t.Error("Error does not contain stack trace.\nError:", err)
}
}
}
func containsStackTrace(err error) bool {
// This is a simple yet naive way to check that stack trace is in the string.
// Stack trace always contain information about calling the method runtime/debug.Stack
return strings.Contains(err.Error(), "runtime/debug.Stack")
}