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package schema
import (
"strings"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/descriptorpb"
)
// TestProtobufDecoder_BasicDecoding tests basic protobuf decoding functionality
func TestProtobufDecoder_BasicDecoding(t *testing.T) {
// Create a test FileDescriptorSet with a simple message
fds := createTestFileDescriptorSet(t, "TestMessage", []TestField{
{Name: "name", Number: 1, Type: descriptorpb.FieldDescriptorProto_TYPE_STRING, Label: descriptorpb.FieldDescriptorProto_LABEL_OPTIONAL},
{Name: "id", Number: 2, Type: descriptorpb.FieldDescriptorProto_TYPE_INT32, Label: descriptorpb.FieldDescriptorProto_LABEL_OPTIONAL},
})
binaryData, err := proto.Marshal(fds)
require.NoError(t, err)
t.Run("NewProtobufDecoder with binary descriptor", func(t *testing.T) {
// This should now work with our integrated descriptor parser
decoder, err := NewProtobufDecoder(binaryData)
// Phase E3: Descriptor resolution now works!
if err != nil {
// If it fails, it should be due to remaining implementation issues
assert.True(t,
strings.Contains(err.Error(), "failed to build file descriptor") ||
strings.Contains(err.Error(), "message descriptor resolution not fully implemented"),
"Expected descriptor resolution error, got: %s", err.Error())
assert.Nil(t, decoder)
} else {
// Success! Decoder creation is working
assert.NotNil(t, decoder)
assert.NotNil(t, decoder.descriptor)
t.Log("Protobuf decoder creation succeeded - Phase E3 is working!")
}
})
t.Run("NewProtobufDecoder with empty message name", func(t *testing.T) {
// Test the findFirstMessageName functionality
parser := NewProtobufDescriptorParser()
schema, err := parser.ParseBinaryDescriptor(binaryData, "")
// Phase E3: Should find the first message name and may succeed
if err != nil {
// If it fails, it should be due to remaining implementation issues
assert.True(t,
strings.Contains(err.Error(), "failed to build file descriptor") ||
strings.Contains(err.Error(), "message descriptor resolution not fully implemented"),
"Expected descriptor resolution error, got: %s", err.Error())
} else {
// Success! Empty message name resolution is working
assert.NotNil(t, schema)
assert.Equal(t, "TestMessage", schema.MessageName)
t.Log("Empty message name resolution succeeded - Phase E3 is working!")
}
})
}
// TestProtobufDecoder_Integration tests integration with the descriptor parser
func TestProtobufDecoder_Integration(t *testing.T) {
// Create a more complex test descriptor
fds := createComplexTestFileDescriptorSet(t)
binaryData, err := proto.Marshal(fds)
require.NoError(t, err)
t.Run("Parse complex descriptor", func(t *testing.T) {
parser := NewProtobufDescriptorParser()
// Test with empty message name - should find first message
schema, err := parser.ParseBinaryDescriptor(binaryData, "")
// Phase E3: May succeed or fail depending on message complexity
if err != nil {
assert.True(t,
strings.Contains(err.Error(), "failed to build file descriptor") ||
strings.Contains(err.Error(), "cannot resolve type"),
"Expected descriptor building error, got: %s", err.Error())
} else {
assert.NotNil(t, schema)
assert.NotEmpty(t, schema.MessageName)
t.Log("Empty message name resolution succeeded!")
}
// Test with specific message name
schema2, err2 := parser.ParseBinaryDescriptor(binaryData, "ComplexMessage")
// Phase E3: May succeed or fail depending on message complexity
if err2 != nil {
assert.True(t,
strings.Contains(err2.Error(), "failed to build file descriptor") ||
strings.Contains(err2.Error(), "cannot resolve type"),
"Expected descriptor building error, got: %s", err2.Error())
} else {
assert.NotNil(t, schema2)
assert.Equal(t, "ComplexMessage", schema2.MessageName)
t.Log("Complex message resolution succeeded!")
}
})
}
// TestProtobufDecoder_Caching tests that decoder creation uses caching properly
func TestProtobufDecoder_Caching(t *testing.T) {
fds := createTestFileDescriptorSet(t, "CacheTestMessage", []TestField{
{Name: "value", Number: 1, Type: descriptorpb.FieldDescriptorProto_TYPE_STRING},
})
binaryData, err := proto.Marshal(fds)
require.NoError(t, err)
t.Run("Decoder creation uses cache", func(t *testing.T) {
// First attempt
_, err1 := NewProtobufDecoder(binaryData)
assert.Error(t, err1)
// Second attempt - should use cached parsing
_, err2 := NewProtobufDecoder(binaryData)
assert.Error(t, err2)
// Errors should be identical (indicating cache usage)
assert.Equal(t, err1.Error(), err2.Error())
})
}
// Helper function to create a complex test FileDescriptorSet
func createComplexTestFileDescriptorSet(t *testing.T) *descriptorpb.FileDescriptorSet {
// Create a file descriptor with multiple messages
fileDesc := &descriptorpb.FileDescriptorProto{
Name: proto.String("test_complex.proto"),
Package: proto.String("test"),
MessageType: []*descriptorpb.DescriptorProto{
{
Name: proto.String("ComplexMessage"),
Field: []*descriptorpb.FieldDescriptorProto{
{
Name: proto.String("simple_field"),
Number: proto.Int32(1),
Type: descriptorpb.FieldDescriptorProto_TYPE_STRING.Enum(),
},
{
Name: proto.String("repeated_field"),
Number: proto.Int32(2),
Type: descriptorpb.FieldDescriptorProto_TYPE_INT32.Enum(),
Label: descriptorpb.FieldDescriptorProto_LABEL_REPEATED.Enum(),
},
},
},
{
Name: proto.String("SimpleMessage"),
Field: []*descriptorpb.FieldDescriptorProto{
{
Name: proto.String("id"),
Number: proto.Int32(1),
Type: descriptorpb.FieldDescriptorProto_TYPE_INT64.Enum(),
},
},
},
},
}
return &descriptorpb.FileDescriptorSet{
File: []*descriptorpb.FileDescriptorProto{fileDesc},
}
}
// TestProtobufDecoder_ErrorHandling tests error handling in various scenarios
func TestProtobufDecoder_ErrorHandling(t *testing.T) {
t.Run("Invalid binary data", func(t *testing.T) {
invalidData := []byte("not a protobuf descriptor")
decoder, err := NewProtobufDecoder(invalidData)
assert.Error(t, err)
assert.Nil(t, decoder)
assert.Contains(t, err.Error(), "failed to parse binary descriptor")
})
t.Run("Empty binary data", func(t *testing.T) {
emptyData := []byte{}
decoder, err := NewProtobufDecoder(emptyData)
assert.Error(t, err)
assert.Nil(t, decoder)
})
t.Run("FileDescriptorSet with no messages", func(t *testing.T) {
// Create an empty FileDescriptorSet
fds := &descriptorpb.FileDescriptorSet{
File: []*descriptorpb.FileDescriptorProto{
{
Name: proto.String("empty.proto"),
Package: proto.String("empty"),
// No MessageType defined
},
},
}
binaryData, err := proto.Marshal(fds)
require.NoError(t, err)
decoder, err := NewProtobufDecoder(binaryData)
assert.Error(t, err)
assert.Nil(t, decoder)
assert.Contains(t, err.Error(), "no messages found")
})
}
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