switched from github.com/pkg/errors to built-in errors (#11)

go.mod

@@ -2,7 +2,4 @@ module github.com/vtopc/epoch
 
 go 1.14
 
-require (
-	github.com/pkg/errors v0.9.1
-	github.com/stretchr/testify v1.6.1
-)
+require github.com/stretchr/testify v1.6.1

go.sum

@@ -1,7 +1,5 @@
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
-github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=

milliseconds.go

@@ -2,9 +2,8 @@ package epoch
 
 import (
 	"encoding/json"
+	"fmt"
 	"time"
-
-	"github.com/pkg/errors"
 )
 
 // Milliseconds - same as epoch.Seconds, but for Epoch(Unix time) in milliseconds.
@@ -26,7 +25,7 @@ func (m Milliseconds) MarshalJSON() ([]byte, error) {
 func (m *Milliseconds) UnmarshalJSON(data []byte) error {
 	ms, err := parseInt64(string(data))
 	if err != nil {
-		return errors.Wrap(err, "failed to parse epoch.Milliseconds")
+		return fmt.Errorf("failed to parse epoch.Milliseconds: %w", err)
 	}
 
 	m.Time = msToTime(ms)

milliseconds_test.go

@@ -2,11 +2,11 @@ package epoch
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"testing"
 	"time"
 
-	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )

seconds.go

@@ -2,9 +2,8 @@ package epoch
 
 import (
 	"encoding/json"
+	"fmt"
 	"time"
-
-	"github.com/pkg/errors"
 )
 
 // Seconds - seconds since the Epoch(Unix time).
@@ -28,7 +27,7 @@ func (s Seconds) MarshalJSON() ([]byte, error) {
 func (s *Seconds) UnmarshalJSON(data []byte) error {
 	ts, err := parseInt64(string(data))
 	if err != nil {
-		return errors.Wrap(err, "failed to parse epoch.Seconds")
+		return fmt.Errorf("failed to parse epoch.Seconds: %w", err)
 	}
 
 	s.Time = time.Unix(ts, 0)

seconds_test.go

@@ -2,11 +2,11 @@ package epoch
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"testing"
 	"time"
 
-	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )

str_milliseconds.go

@@ -2,10 +2,9 @@ package epoch
 
 import (
 	"encoding/json"
+	"fmt"
 	"strconv"
 	"time"
-
-	"github.com/pkg/errors"
 )
 
 // StrMilliseconds - same as epoch.Milliseconds, but for strings.
@@ -30,12 +29,12 @@ func (m *StrMilliseconds) UnmarshalJSON(data []byte) error {
 
 	err := json.Unmarshal(data, &v)
 	if err != nil {
-		return errors.Wrap(err, "failed to unmarshal epoch.StrMilliseconds")
+		return fmt.Errorf("failed to unmarshal epoch.StrMilliseconds: %w", err)
 	}
 
 	ms, err := parseInt64(v)
 	if err != nil {
-		return errors.Wrap(err, "failed to parse epoch.StrMilliseconds")
+		return fmt.Errorf("failed to parse epoch.StrMilliseconds: %w", err)
 	}
 
 	m.Time = msToTime(ms)

str_milliseconds_test.go

@@ -2,11 +2,11 @@ package epoch
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"testing"
 	"time"
 
-	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )

str_seconds.go

@@ -2,10 +2,9 @@ package epoch
 
 import (
 	"encoding/json"
+	"fmt"
 	"strconv"
 	"time"
-
-	"github.com/pkg/errors"
 )
 
 // StrSeconds - seconds since the Epoch(Unix time) as string.
@@ -31,12 +30,12 @@ func (s *StrSeconds) UnmarshalJSON(data []byte) error {
 
 	err := json.Unmarshal(data, &v)
 	if err != nil {
-		return errors.Wrap(err, "failed to unmarshal epoch.StrSeconds")
+		return fmt.Errorf("failed to unmarshal epoch.StrSeconds: %w", err)
 	}
 
 	ts, err := parseInt64(v)
 	if err != nil {
-		return errors.Wrap(err, "failed to parse epoch.StrSeconds")
+		return fmt.Errorf("failed to parse epoch.StrSeconds: %w", err)
 	}
 
 	s.Time = time.Unix(ts, 0)

str_seconds_test.go

@@ -2,11 +2,11 @@ package epoch
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"testing"
 	"time"
 
-	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )