test(transformer): add end-to-end coverage and fix silent error wrapping (#3873)

Signed-off-by: jingze <daijingze.djz@alibaba-inc.com>

plugins/wasm-go/extensions/transformer/go.mod

@@ -5,8 +5,8 @@ go 1.24.1
 toolchain go1.24.4
 
 require (
-	github.com/higress-group/proxy-wasm-go-sdk v0.0.0-20250611100342-5654e89a7a80
-	github.com/higress-group/wasm-go v1.0.2
+	github.com/higress-group/proxy-wasm-go-sdk v0.0.0-20251103120604-77e9cce339d2
+	github.com/higress-group/wasm-go v1.0.10-0.20260120033417-1c84f010156d
 	github.com/pkg/errors v0.9.1
 	github.com/stretchr/testify v1.9.0
 	github.com/tidwall/gjson v1.18.0
@@ -18,6 +18,7 @@ require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/tetratelabs/wazero v1.7.2 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
 	github.com/tidwall/resp v0.1.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect

plugins/wasm-go/extensions/transformer/go.sum

@@ -2,18 +2,18 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/higress-group/proxy-wasm-go-sdk v0.0.0-20250611100342-5654e89a7a80 h1:xqmtTZI0JQ2O+Lg9/CE6c+Tw9KD6FnvWw8EpLVuuvfg=
-github.com/higress-group/proxy-wasm-go-sdk v0.0.0-20250611100342-5654e89a7a80/go.mod h1:tRI2LfMudSkKHhyv1uex3BWzcice2s/l8Ah8axporfA=
-github.com/higress-group/wasm-go v1.0.0 h1:4Ik5n3FsJ5+r13KLQl2ky+8NuAE8dfWQwoKxXYD2KAw=
-github.com/higress-group/wasm-go v1.0.0/go.mod h1:ODBV27sjmhIW8Cqv3R74EUcTnbdkE69bmXBQFuRkY1M=
-github.com/higress-group/wasm-go v1.0.2 h1:8fQqR+wHts8tP+v7GYxmsCNyW5nAjn9wPYV0/+Seqzg=
-github.com/higress-group/wasm-go v1.0.2/go.mod h1:882/J8ccU4i+LeyFKmeicbHWAYLj8y7YZr60zk0OOCI=
+github.com/higress-group/proxy-wasm-go-sdk v0.0.0-20251103120604-77e9cce339d2 h1:NY33OrWCJJ+DFiLc+lsBY4Ywor2Ik61ssk6qkGF8Ypo=
+github.com/higress-group/proxy-wasm-go-sdk v0.0.0-20251103120604-77e9cce339d2/go.mod h1:tRI2LfMudSkKHhyv1uex3BWzcice2s/l8Ah8axporfA=
+github.com/higress-group/wasm-go v1.0.10-0.20260120033417-1c84f010156d h1:LgYbzEBtg0+LEqoebQeMVgAB6H5SgqG+KN+gBhNfKbM=
+github.com/higress-group/wasm-go v1.0.10-0.20260120033417-1c84f010156d/go.mod h1:uKVYICbRaxTlKqdm8E0dpjbysxM8uCPb9LV26hF3Km8=
 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/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/tetratelabs/wazero v1.7.2 h1:1+z5nXJNwMLPAWaTePFi49SSTL0IMx/i3Fg8Yc25GDc=
+github.com/tetratelabs/wazero v1.7.2/go.mod h1:ytl6Zuh20R/eROuyDaGPkp82O9C/DJfXAwJfQ3X6/7Y=
 github.com/tidwall/gjson v1.14.2/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
 github.com/tidwall/gjson v1.18.0 h1:FIDeeyB800efLX89e5a8Y0BNH+LOngJyGrIWxG2FKQY=
 github.com/tidwall/gjson v1.18.0/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=

plugins/wasm-go/extensions/transformer/main.go

@@ -709,8 +709,7 @@ func newTransformRule(rules []gjson.Result) (res []TransformRule, err error) {
 		var tRule TransformRule
 		tRule.operate = strings.ToLower(r.Get("operate").String())
 		if !isValidOperation(tRule.operate) {
-			errors.Wrapf(err, "invalid operate type %q", tRule.operate)
-			return
+			return nil, errors.Errorf("invalid operate type %q", tRule.operate)
 		}
 
 		if tRule.operate == "map" {
@@ -720,8 +719,7 @@ func newTransformRule(rules []gjson.Result) (res []TransformRule, err error) {
 			} else {
 				tRule.mapSource = mapSourceInJson.String()
 				if !isValidMapSource(tRule.mapSource) {
-					errors.Wrapf(err, "invalid map source %q", tRule.mapSource)
-					return
+					return nil, errors.Errorf("invalid map source %q", tRule.mapSource)
 				}
 			}
 		}
@@ -738,8 +736,7 @@ func newTransformRule(rules []gjson.Result) (res []TransformRule, err error) {
 				valueType = "string"
 			}
 			if !isValidJsonType(valueType) {
-				errors.Wrapf(err, "invalid body params type %q", valueType)
-				return
+				return nil, errors.Errorf("invalid body params type %q", valueType)
 			}
 			tRule.body = append(tRule.body, constructParam(b, tRule.operate, valueType))
 		}
@@ -1110,7 +1107,7 @@ func (h jsonHandler) handle(host, path string, oriData []byte, mapSourceData map
 				}
 				convertedAppendValue, err := convertByJsonType(valueType, appendValue)
 				if err != nil {
-					return nil, errors.Wrapf(err, errAppend.Error())
+					return nil, errors.Wrap(err, errAppend.Error())
 				}
 				oldValue := gjson.GetBytes(data, key)
 				if !oldValue.Exists() {
@@ -1332,7 +1329,7 @@ func newKvtGroup(rules []TransformRule, typ string) (g []kvtOperation, isChange
 		case "append":
 			kvtOp.kvtOpType = AppendK
 		default:
-			return nil, false, false, errors.Wrap(err, "invalid operation type")
+			return nil, false, false, errors.Errorf("invalid operation type %q", r.operate)
 		}
 		for _, p := range prams {
 			switch r.operate {