protobuf

ext/protobuf/_assertauto/Test.json

@@ -0,0 +1,10 @@
+{
+	"entries": [
+		{
+			"equal": {
+				"type": "string",
+				"value": "[*wrapperspb.StringValue] {\n\tvalue: [string] (len=4) \"test\",\n}"
+			}
+		}
+	]
+}

ext/protobuf/protobuf.go

@@ -0,0 +1,52 @@
+package protobuf
+
+import (
+	"reflect"
+
+	"github.com/pierrre/pretty"
+	"github.com/pierrre/pretty/internal/indent"
+	"github.com/pierrre/pretty/internal/must"
+	"github.com/pierrre/pretty/internal/write"
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+type ValueWriter struct {
+	pretty.ValueWriter
+}
+
+// WriteValue implements [pretty.ValueWriter].
+func (vw *ValueWriter) WriteValue(st *pretty.State, v reflect.Value) bool {
+	if !v.CanInterface() {
+		return false
+	}
+	pm, ok := v.Interface().(protoreflect.ProtoMessage)
+	if !ok {
+		return false
+	}
+	m := pm.ProtoReflect()
+	defer st.SetRestoreKnownType(false)() // We want to show the types of fields and values.
+	write.MustString(st.Writer, "{")
+	fs := m.Descriptor().Fields()
+	l := fs.Len()
+	hasFields := false
+	st.IndentLevel++
+	for i := range l {
+		fd := fs.Get(i)
+		if !hasFields {
+			write.MustString(st.Writer, "\n")
+			hasFields = true
+		}
+		indent.MustWrite(st.Writer, st.IndentString, st.IndentLevel)
+		fd.Name()
+		write.MustString(st.Writer, string(fd.Name()))
+		write.MustString(st.Writer, ": ")
+		must.Handle(vw.ValueWriter.WriteValue(st, reflect.ValueOf(m.Get(fd).Interface())))
+		write.MustString(st.Writer, ",\n")
+	}
+	st.IndentLevel--
+	if hasFields {
+		indent.MustWrite(st.Writer, st.IndentString, st.IndentLevel)
+	}
+	write.MustString(st.Writer, "}")
+	return true
+}

ext/protobuf/protobuf_test.go

@@ -0,0 +1,23 @@
+package protobuf
+
+import (
+	"slices"
+	"testing"
+
+	"github.com/pierrre/assert/assertauto"
+	"github.com/pierrre/pretty"
+	"google.golang.org/protobuf/types/known/wrapperspb"
+)
+
+func init() {
+	pretty.DefaultCommonValueWriter.ConfigureTest()
+	pretty.DefaultCommonValueWriter.ValueWriters = slices.Insert(pretty.DefaultCommonValueWriter.ValueWriters, 0, pretty.ValueWriter(&ValueWriter{
+		ValueWriter: pretty.DefaultCommonValueWriter,
+	}))
+}
+
+func Test(t *testing.T) {
+	v := wrapperspb.String("test")
+	s := pretty.String(v)
+	assertauto.Equal(t, s)
+}

go.mod

@@ -6,6 +6,7 @@ require (
 	github.com/pierrre/assert v0.6.6
 	github.com/pierrre/errors v0.10.1
 	github.com/pierrre/go-libs v0.10.4
+	google.golang.org/protobuf v1.36.3
 )
 
 require github.com/pierrre/compare v1.4.13 // indirect

go.sum

@@ -1,3 +1,5 @@
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/pierrre/assert v0.6.6 h1:NTuGmUjgYnLzLfIbsSw4ExRwdxRe1W33RznZRI4lQRI=
 github.com/pierrre/assert v0.6.6/go.mod h1:sXsSQfPNeL4Nvd/+pa0OkD7WEIVXMHhOC1MJj0sx694=
 github.com/pierrre/compare v1.4.13 h1:b6gi3OgN1emmD1Ly37m+B/Pbq6tac+w3lNGT5xu4I10=
@@ -6,3 +8,7 @@ github.com/pierrre/errors v0.10.1 h1:kSwceHaLh/yQ4MfJ7buh/HK5/pl+CZYQmb+ailJ9gmI
 github.com/pierrre/errors v0.10.1/go.mod h1:IAGTUdSAq0X50i9MGEVXwhGAyRqXqC3/8qYSxaWFGks=
 github.com/pierrre/go-libs v0.10.4 h1:ty5bNcT02BvyX825PRC35oHdAVMHcvfybK2LEsHJ+H8=
 github.com/pierrre/go-libs v0.10.4/go.mod h1:Bd2rkKVvjMWABSeFwRHJfou1eKZPFTfL4N1YdICq5z4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/protobuf v1.36.3 h1:82DV7MYdb8anAVi3qge1wSnMDrnKK7ebr+I0hHRN1BU=
+google.golang.org/protobuf v1.36.3/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=