blob: 3bd7e0524e9794dd81079f0377ed0de9d24433fa [file] [log] [blame] [edit]
package skerr_test
import (
"encoding/json"
"errors"
"fmt"
"io"
"testing"
"github.com/stretchr/testify/require"
"go.skia.org/infra/go/skerr"
"go.skia.org/infra/go/skerr/alpha_test"
"go.skia.org/infra/go/skerr/beta_test"
)
func TestCallStack(t *testing.T) {
var stack []skerr.StackTrace
callback := func() error {
stack = skerr.CallStack(7, 0)
return nil
}
var alpha alpha_test.Alpha
alpha.SetWrappedCallback(callback)
require.NoError(t, beta_test.CallAlpha(&alpha))
require.Len(t, stack, 7)
// Only assert line numbers in alpha_test.go and beta_test.go to avoid making the test brittle.
require.Equal(t, "skerr.go", stack[0].File) // CallStack -> runtime.Caller
require.Equal(t, "skerr_test.go", stack[1].File) // anonymous function in TestCallStack
require.Equal(t, "alpha.go:14", stack[2].String()) // anonymous function in SetWrappedCallback
require.Equal(t, "alpha.go:23", stack[3].String()) // Alpha.Call
require.Equal(t, "beta.go:18", stack[4].String()) // callAlphaInternal
require.Equal(t, "beta.go:22", stack[5].String()) // CallAlpha
require.Equal(t, "skerr_test.go", stack[6].File) // TestCallStack
}
func TestWrap(t *testing.T) {
var alpha alpha_test.Alpha
alpha.SetWrappedCallback(beta_test.GetGenericError)
err := alpha.Call()
require.Equal(t, beta_test.GenericError, skerr.Unwrap(err))
require.Regexp(t, beta_test.GenericError.Error()+`\. At alpha\.go:15 alpha\.go:23 skerr_test\.go:\d+.*`, err.Error())
}
func TestUnwrapOtherErr(t *testing.T) {
err := beta_test.GenericError
require.Equal(t, err, skerr.Unwrap(err))
}
func TestFmt(t *testing.T) {
const fmtStr = "Dog too small; dog is %d kg; minimum is %d kg."
callback := func() error {
return skerr.Fmt(fmtStr, 45, 50)
}
var alpha alpha_test.Alpha
alpha.SetWrappedCallback(callback)
err := alpha.Call()
errStr := fmt.Sprintf(fmtStr, 45, 50)
require.Equal(t, errStr, skerr.Unwrap(err).Error())
require.Regexp(t, errStr+`\. At skerr_test\.go:\d+ alpha\.go:14 alpha\.go:23 skerr_test\.go:\d+.*`, err.Error())
}
func TestWrapfCreate(t *testing.T) {
err := beta_test.Context1(beta_test.GetGenericError)
require.Equal(t, beta_test.GenericError, skerr.Unwrap(err))
require.Regexp(t, `When searching for 35 trees: human detected\. At beta.go:31 skerr_test\.go:\d+.*`, err.Error())
}
func TestWrapfAppend(t *testing.T) {
callback := func() error {
return skerr.Fmt("Dog lost interest")
}
err := beta_test.Context2(callback)
require.Regexp(t, `When walking the dog: When searching for 35 trees: Dog lost interest\. At skerr_test\.go:\d+ beta.go:30 beta.go:38 skerr_test\.go:\d+.*`, err.Error())
}
func TestErrorWithContextUnwrap_ErrorIsWrapped_UnwrapReturnsNextErrorInTheChain(t *testing.T) {
wrappedEOF := skerr.Wrap(io.EOF)
require.Equal(t, errors.Unwrap(wrappedEOF), io.EOF)
}
func TestErrorWithContextUnwrap_ErrorIsWrapped_IsFindsCorrectErrorInTheChain(t *testing.T) {
wrappedEOF := skerr.Wrap(io.EOF)
require.True(t, errors.Is(wrappedEOF, io.EOF))
}
func TestErrorWithContextUnwrap_ErrorIsWrapped_AsExtractsCorrectErrorInTheChain(t *testing.T) {
// Create an error that's interesting to unwrap.
err := &json.SyntaxError{
Offset: 32,
}
wrappedEOF := skerr.Wrapf(err, "decode JSON")
// Use As to extract the Syntax error.
var syntaxError *json.SyntaxError
require.True(t, errors.As(wrappedEOF, &syntaxError))
require.Equal(t, int64(32), syntaxError.Offset)
}