feat: support logx.WithFields (#2128)

core/logx/fields_test.go

@@ -0,0 +1,35 @@
+package logx
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestWithFields(t *testing.T) {
+	ctx := WithFields(context.Background(), Field("a", 1), Field("b", 2))
+	vals := ctx.Value(fieldsContextKey)
+	assert.NotNil(t, vals)
+	fields, ok := vals.([]LogField)
+	assert.True(t, ok)
+	assert.EqualValues(t, []LogField{Field("a", 1), Field("b", 2)}, fields)
+}
+
+func TestWithFieldsAppend(t *testing.T) {
+	var dummyKey struct{}
+	ctx := context.WithValue(context.Background(), dummyKey, "dummy")
+	ctx = WithFields(ctx, Field("a", 1), Field("b", 2))
+	ctx = WithFields(ctx, Field("c", 3), Field("d", 4))
+	vals := ctx.Value(fieldsContextKey)
+	assert.NotNil(t, vals)
+	fields, ok := vals.([]LogField)
+	assert.True(t, ok)
+	assert.Equal(t, "dummy", ctx.Value(dummyKey))
+	assert.EqualValues(t, []LogField{
+		Field("a", 1),
+		Field("b", 2),
+		Field("c", 3),
+		Field("d", 4),
+	}, fields)
+}