more tests for external libs and pkg/errors

tests/external.go

@@ -0,0 +1,21 @@
+package tests
+
+import (
+	"errors"
+	"fmt"
+
+	pkg_errors "github.com/pkg/errors"
+)
+
+var (
+	errExternalStdlib = errors.New("stdlib external error")
+	errExternalPkgerr = pkg_errors.New("github.com/pkg/errors external error")
+)
+
+func externalError() error {
+	return fmt.Errorf("external error wrapped with errorf: %w", errExternalStdlib)
+}
+
+func externalWrappedError() error {
+	return pkg_errors.Wrap(errExternalPkgerr, "external error wrapped with pkg/errors")
+}

tests/format_test.go

@@ -102,3 +102,34 @@ failed to call function
 \s+.+fault/tests/test_callers.go:11
 `, fmt.Sprintf("%+v", err))
 }
+
+func TestFormatStdlibErrorfWrappedExternallyWrappedError(t *testing.T) {
+	a := assert.New(t)
+
+	err := errorCaller(7)
+
+	a.Equal("failed to call function: errorf wrapped external: external error wrapped with pkg/errors: github.com/pkg/errors external error", fmt.Sprintf("%s", err.Error()))
+	a.Equal("failed to call function: errorf wrapped external: external error wrapped with pkg/errors: github.com/pkg/errors external error", fmt.Sprintf("%s", err))
+	a.Equal("failed to call function: errorf wrapped external: external error wrapped with pkg/errors: github.com/pkg/errors external error", fmt.Sprintf("%v", err))
+	a.Regexp(`errorf wrapped external: external error wrapped with pkg/errors: github.com/pkg/errors external error
+\s+.+fault/tests/test_callers.go:29
+failed to call function
+\s+.+fault/tests/test_callers.go:20
+\s+.+fault/tests/test_callers.go:11
+`, fmt.Sprintf("%+v", err))
+}
+
+func TestFormatStdlibErrorfWrappedExternallyWrappedErrorBLank(t *testing.T) {
+	a := assert.New(t)
+
+	err := errorProducerFromRootCause(8)
+
+	a.Equal("external error wrapped with pkg/errors: github.com/pkg/errors external error", fmt.Sprintf("%s", err.Error()))
+	a.Equal("external error wrapped with pkg/errors: github.com/pkg/errors external error", fmt.Sprintf("%s", err))
+	a.Equal("external error wrapped with pkg/errors: github.com/pkg/errors external error", fmt.Sprintf("%v", err))
+
+	a.Regexp(
+		`external error wrapped with pkg/errors: github.com/pkg/errors external error
+\s+.+fault/tests/test_callers.go:29
+`, fmt.Sprintf("%+v", err))
+}

tests/go.mod

@@ -4,6 +4,7 @@ go 1.18
 
 require (
 	github.com/Southclaws/fault v0.4.1
+	github.com/pkg/errors v0.9.1
 	github.com/stretchr/testify v1.8.1
 )
 

tests/go.sum

@@ -7,6 +7,8 @@ github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+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/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=

tests/root.go

@@ -31,12 +31,12 @@ func rootCause(kind int) error {
 	} else if kind == 6 {
 		err := externalError()
 		return fmt.Errorf("errorf wrapped external: %w", err)
+	} else if kind == 7 {
+		err := externalWrappedError()
+		return fmt.Errorf("errorf wrapped external: %w", err)
+	} else if kind == 8 {
+		err := externalWrappedError()
+		return err
 	}
 	return nil
 }
-
-var errExternalStdlib = errors.New("stdlib external error")
-
-func externalError() error {
-	return fmt.Errorf("external error wrapped with errorf: %w", errExternalStdlib)
-}