Add cause in Error.Error()

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## 0.8.1 (develop branch)
+
+FEATURES:
+
+ - [common] Error.Error() includes cause
+
 ## 0.8.0 (develop branch)
 
 BREAKING:

common/errors.go

@@ -200,7 +200,11 @@ func (err *cmnError) Format(s fmt.State, verb rune) {
 			s.Write([]byte("--= /Error =--\n"))
 		} else {
 			// Write msg.
-			s.Write([]byte(fmt.Sprintf("Error{`%v`}", err.msg))) // TODO tick-esc?
+			if err.cause != nil {
+				s.Write([]byte(fmt.Sprintf("Error{`%s` (cause: %v)}", err.msg, err.cause))) // TODO tick-esc?
+			} else {
+				s.Write([]byte(fmt.Sprintf("Error{`%s`}", err.msg))) // TODO tick-esc?
+			}
 		}
 	}
 }

common/errors_test.go

@@ -28,7 +28,7 @@ func TestErrorPanic(t *testing.T) {
 	assert.Equal(t, pnk{"something"}, err.Cause())
 	assert.Equal(t, pnk{"something"}, err.T())
 	assert.Equal(t, "This is the message in ErrorWrap(r, message).", err.Message())
-	assert.Equal(t, "Error{`This is the message in ErrorWrap(r, message).`}", fmt.Sprintf("%v", err))
+	assert.Equal(t, "Error{`This is the message in ErrorWrap(r, message).` (cause: {something})}", fmt.Sprintf("%v", err))
 	assert.Contains(t, fmt.Sprintf("%#v", err), "Message: This is the message in ErrorWrap(r, message).")
 	assert.Contains(t, fmt.Sprintf("%#v", err), "Stack Trace:\n    0")
 }
@@ -40,7 +40,7 @@ func TestErrorWrapSomething(t *testing.T) {
 	assert.Equal(t, "something", err.Cause())
 	assert.Equal(t, "something", err.T())
 	assert.Equal(t, "formatter01", err.Message())
-	assert.Equal(t, "Error{`formatter01`}", fmt.Sprintf("%v", err))
+	assert.Equal(t, "Error{`formatter01` (cause: something)}", fmt.Sprintf("%v", err))
 	assert.Regexp(t, `Message: formatter01\n`, fmt.Sprintf("%#v", err))
 	assert.Contains(t, fmt.Sprintf("%#v", err), "Stack Trace:\n    0")
 }

version/version.go

@@ -1,3 +1,3 @@
 package version
 
-const Version = "0.8.0"
+const Version = "0.8.1"