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github-merge-queue[bot] pushed a commit to branch 
gh-readonly-queue/main/pr-5877-e7eba322ca3cd7164187eae782620b4ebcd7f7a3
in repository https://gitbox.apache.org/repos/asf/texera.git

commit e270f830be7d11a59a8357eeecec2251d642c872
Author: Xinyuan Lin <[email protected]>
AuthorDate: Tue Jun 23 10:50:43 2026 -0700

    test(workflow-operator): add unit test coverage for Java and R UDF operator 
descriptors (#5877)
    
    ### What changes were proposed in this PR?
    
    Pin behavior of three previously-untested Java/R UDF descriptors in
    `common/workflow-operator/udf/`. No production-code changes.
    
    | Spec | Source class | Tests |
    | --- | --- | --- |
    | `JavaUDFOpDescSpec` | `JavaUDFOpDesc` | 6 |
    | `RUDFOpDescSpec` | `RUDFOpDesc` | 6 |
    | `RUDFSourceOpDescSpec` | `RUDFSourceOpDesc` | 6 |
    
    **Behavior pinned**
    
    | Surface | Contract |
    | --- | --- |
    | `operatorInfo` | exact name + group (`Java`/`R`); `JavaUDF`/`RUDF`
    dynamic 1-in/1-out; `RUDFSource` zero inputs / one output |
    | `getPhysicalOp` | wires `OpExecWithCode` (Java tagged `"java"`); port
    identities carried; rejects `workers <= 0` |
    | Schema propagation | `JavaUDF`/`RUDF`: `retainInputColumns=false` →
    only output columns, `true` → input + output columns; `RUDFSource`:
    `sourceSchema()` from the `columns` field |
    | Round-trip | config fields preserved through the polymorphic base
    (incl. R `useTupleAPI`) |
    
    ### Any related issues, documentation, discussions?
    
    Closes #5874.
    
    ### How was this PR tested?
    
    - `sbt "WorkflowOperator/testOnly
    org.apache.texera.amber.operator.udf.java.JavaUDFOpDescSpec
    org.apache.texera.amber.operator.udf.r.RUDFOpDescSpec
    org.apache.texera.amber.operator.udf.r.RUDFSourceOpDescSpec"` — 18
    tests, all green
    - `sbt "WorkflowOperator/Test/scalafmtCheck"` and `sbt
    "WorkflowOperator/Test/scalafix --check"` — clean
    - CI to confirm
    
    ### Was this PR authored or co-authored using generative AI tooling?
    
    Generated-by: Claude Code (Opus 4.8 [1M context])
---
 .../operator/udf/java/JavaUDFOpDescSpec.scala      | 109 ++++++++++++++++++++
 .../amber/operator/udf/r/RUDFOpDescSpec.scala      | 112 +++++++++++++++++++++
 .../operator/udf/r/RUDFSourceOpDescSpec.scala      |  87 ++++++++++++++++
 3 files changed, 308 insertions(+)

diff --git 
a/common/workflow-operator/src/test/scala/org/apache/texera/amber/operator/udf/java/JavaUDFOpDescSpec.scala
 
b/common/workflow-operator/src/test/scala/org/apache/texera/amber/operator/udf/java/JavaUDFOpDescSpec.scala
new file mode 100644
index 0000000000..6ea1fe8bc4
--- /dev/null
+++ 
b/common/workflow-operator/src/test/scala/org/apache/texera/amber/operator/udf/java/JavaUDFOpDescSpec.scala
@@ -0,0 +1,109 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.texera.amber.operator.udf.java
+
+import org.apache.texera.amber.core.executor.OpExecWithCode
+import org.apache.texera.amber.core.tuple.{Attribute, AttributeType, Schema}
+import org.apache.texera.amber.core.virtualidentity.{ExecutionIdentity, 
WorkflowIdentity}
+import org.apache.texera.amber.operator.LogicalOp
+import org.apache.texera.amber.operator.metadata.OperatorGroupConstants
+import org.apache.texera.amber.util.JSONUtils.objectMapper
+import org.scalatest.flatspec.AnyFlatSpec
+import org.scalatest.matchers.should.Matchers
+
+class JavaUDFOpDescSpec extends AnyFlatSpec with Matchers {
+
+  private val workflowId = WorkflowIdentity(1L)
+  private val executionId = ExecutionIdentity(1L)
+
+  "JavaUDFOpDesc.operatorInfo" should
+    "advertise the name, Java group, and a default 1-in/1-out shape" in {
+    val info = (new JavaUDFOpDesc).operatorInfo
+    info.userFriendlyName shouldBe "Java UDF"
+    info.operatorGroupName shouldBe OperatorGroupConstants.JAVA_GROUP
+    info.inputPorts should have length 1
+    info.outputPorts should have length 1
+  }
+
+  "JavaUDFOpDesc" should "default code to empty, workers to 1, 
retainInputColumns to false" in {
+    val d = new JavaUDFOpDesc
+    d.code shouldBe ""
+    d.workers shouldBe 1
+    d.retainInputColumns shouldBe false
+  }
+
+  "JavaUDFOpDesc.getPhysicalOp" should
+    "wire OpExecWithCode(code, \"java\") and carry port identities" in {
+    val d = new JavaUDFOpDesc
+    d.code = "return t;"
+    val physical = d.getPhysicalOp(workflowId, executionId)
+    physical.opExecInitInfo match {
+      case OpExecWithCode(code, language) =>
+        language shouldBe "java"
+        code shouldBe "return t;"
+      case other => fail(s"expected OpExecWithCode, got $other")
+    }
+    physical.inputPorts.keySet shouldBe 
d.operatorInfo.inputPorts.map(_.id).toSet
+    physical.outputPorts.keySet shouldBe 
d.operatorInfo.outputPorts.map(_.id).toSet
+  }
+
+  it should "reject a non-positive worker count" in {
+    val d = new JavaUDFOpDesc
+    d.workers = 0
+    intercept[IllegalArgumentException] { d.getPhysicalOp(workflowId, 
executionId) }
+  }
+
+  "JavaUDFOpDesc schema propagation" should
+    "emit only the output columns when input columns are not retained 
(default)" in {
+    val d = new JavaUDFOpDesc
+    d.outputColumns = List(new Attribute("res", AttributeType.INTEGER))
+    val input = Schema().add(new Attribute("in", AttributeType.STRING))
+    d.getExternalOutputSchemas(Map(d.operatorInfo.inputPorts.head.id -> 
input)) shouldBe Map(
+      d.operatorInfo.outputPorts.head.id -> Schema().add(
+        new Attribute("res", AttributeType.INTEGER)
+      )
+    )
+  }
+
+  it should "retain input columns plus the output columns when 
retainInputColumns is true" in {
+    val d = new JavaUDFOpDesc
+    d.retainInputColumns = true
+    d.outputColumns = List(new Attribute("res", AttributeType.INTEGER))
+    val input = Schema().add(new Attribute("in", AttributeType.STRING))
+    d.getExternalOutputSchemas(Map(d.operatorInfo.inputPorts.head.id -> 
input)) shouldBe Map(
+      d.operatorInfo.outputPorts.head.id -> Schema()
+        .add(new Attribute("in", AttributeType.STRING))
+        .add(new Attribute("res", AttributeType.INTEGER))
+    )
+  }
+
+  "JavaUDFOpDesc" should "round-trip its config fields through the polymorphic 
base" in {
+    val d = new JavaUDFOpDesc
+    d.code = "x"
+    d.workers = 4
+    d.retainInputColumns = true
+    val restored = objectMapper.readValue(objectMapper.writeValueAsString(d), 
classOf[LogicalOp])
+    restored shouldBe a[JavaUDFOpDesc]
+    val j = restored.asInstanceOf[JavaUDFOpDesc]
+    j.code shouldBe "x"
+    j.workers shouldBe 4
+    j.retainInputColumns shouldBe true
+  }
+}
diff --git 
a/common/workflow-operator/src/test/scala/org/apache/texera/amber/operator/udf/r/RUDFOpDescSpec.scala
 
b/common/workflow-operator/src/test/scala/org/apache/texera/amber/operator/udf/r/RUDFOpDescSpec.scala
new file mode 100644
index 0000000000..4963af8d6d
--- /dev/null
+++ 
b/common/workflow-operator/src/test/scala/org/apache/texera/amber/operator/udf/r/RUDFOpDescSpec.scala
@@ -0,0 +1,112 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.texera.amber.operator.udf.r
+
+import org.apache.texera.amber.core.executor.OpExecWithCode
+import org.apache.texera.amber.core.tuple.{Attribute, AttributeType, Schema}
+import org.apache.texera.amber.core.virtualidentity.{ExecutionIdentity, 
WorkflowIdentity}
+import org.apache.texera.amber.operator.LogicalOp
+import org.apache.texera.amber.operator.metadata.OperatorGroupConstants
+import org.apache.texera.amber.util.JSONUtils.objectMapper
+import org.scalatest.flatspec.AnyFlatSpec
+import org.scalatest.matchers.should.Matchers
+
+class RUDFOpDescSpec extends AnyFlatSpec with Matchers {
+
+  private val workflowId = WorkflowIdentity(1L)
+  private val executionId = ExecutionIdentity(1L)
+
+  "RUDFOpDesc.operatorInfo" should
+    "advertise the name, R group, and a default 1-in/1-out shape" in {
+    val info = (new RUDFOpDesc).operatorInfo
+    info.userFriendlyName shouldBe "R UDF"
+    info.operatorGroupName shouldBe OperatorGroupConstants.R_GROUP
+    info.inputPorts should have length 1
+    info.outputPorts should have length 1
+  }
+
+  "RUDFOpDesc" should "default code/workers/useTupleAPI/retainInputColumns" in 
{
+    val d = new RUDFOpDesc
+    d.code shouldBe ""
+    d.workers shouldBe 1
+    d.useTupleAPI shouldBe false
+    d.retainInputColumns shouldBe false
+  }
+
+  "RUDFOpDesc.getPhysicalOp" should
+    "wire OpExecWithCode(code, \"r-table\") and carry port identities" in {
+    val d = new RUDFOpDesc
+    d.code = "function(t) t"
+    val physical = d.getPhysicalOp(workflowId, executionId)
+    physical.opExecInitInfo match {
+      case OpExecWithCode(code, language) =>
+        language shouldBe "r-table"
+        code shouldBe "function(t) t"
+      case other => fail(s"expected OpExecWithCode, got $other")
+    }
+    physical.inputPorts.keySet shouldBe 
d.operatorInfo.inputPorts.map(_.id).toSet
+    physical.outputPorts.keySet shouldBe 
d.operatorInfo.outputPorts.map(_.id).toSet
+  }
+
+  it should "reject a non-positive worker count" in {
+    val d = new RUDFOpDesc
+    d.workers = 0
+    intercept[IllegalArgumentException] { d.getPhysicalOp(workflowId, 
executionId) }
+  }
+
+  "RUDFOpDesc schema propagation" should
+    "emit only the output columns when input columns are not retained 
(default)" in {
+    val d = new RUDFOpDesc
+    d.outputColumns = List(new Attribute("res", AttributeType.INTEGER))
+    val input = Schema().add(new Attribute("in", AttributeType.STRING))
+    d.getExternalOutputSchemas(Map(d.operatorInfo.inputPorts.head.id -> 
input)) shouldBe Map(
+      d.operatorInfo.outputPorts.head.id -> Schema().add(
+        new Attribute("res", AttributeType.INTEGER)
+      )
+    )
+  }
+
+  it should "retain input columns plus the output columns when 
retainInputColumns is true" in {
+    val d = new RUDFOpDesc
+    d.retainInputColumns = true
+    d.outputColumns = List(new Attribute("res", AttributeType.INTEGER))
+    val input = Schema().add(new Attribute("in", AttributeType.STRING))
+    d.getExternalOutputSchemas(Map(d.operatorInfo.inputPorts.head.id -> 
input)) shouldBe Map(
+      d.operatorInfo.outputPorts.head.id -> Schema()
+        .add(new Attribute("in", AttributeType.STRING))
+        .add(new Attribute("res", AttributeType.INTEGER))
+    )
+  }
+
+  "RUDFOpDesc" should "round-trip its config fields through the polymorphic 
base" in {
+    val d = new RUDFOpDesc
+    d.code = "f"
+    d.workers = 2
+    d.useTupleAPI = true
+    d.retainInputColumns = true
+    val restored = objectMapper.readValue(objectMapper.writeValueAsString(d), 
classOf[LogicalOp])
+    restored shouldBe a[RUDFOpDesc]
+    val r = restored.asInstanceOf[RUDFOpDesc]
+    r.code shouldBe "f"
+    r.workers shouldBe 2
+    r.useTupleAPI shouldBe true
+    r.retainInputColumns shouldBe true
+  }
+}
diff --git 
a/common/workflow-operator/src/test/scala/org/apache/texera/amber/operator/udf/r/RUDFSourceOpDescSpec.scala
 
b/common/workflow-operator/src/test/scala/org/apache/texera/amber/operator/udf/r/RUDFSourceOpDescSpec.scala
new file mode 100644
index 0000000000..2cfca40e73
--- /dev/null
+++ 
b/common/workflow-operator/src/test/scala/org/apache/texera/amber/operator/udf/r/RUDFSourceOpDescSpec.scala
@@ -0,0 +1,87 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.texera.amber.operator.udf.r
+
+import org.apache.texera.amber.core.executor.OpExecWithCode
+import org.apache.texera.amber.core.tuple.{Attribute, AttributeType, Schema}
+import org.apache.texera.amber.core.virtualidentity.{ExecutionIdentity, 
WorkflowIdentity}
+import org.apache.texera.amber.operator.LogicalOp
+import org.apache.texera.amber.operator.metadata.OperatorGroupConstants
+import org.apache.texera.amber.util.JSONUtils.objectMapper
+import org.scalatest.flatspec.AnyFlatSpec
+import org.scalatest.matchers.should.Matchers
+
+class RUDFSourceOpDescSpec extends AnyFlatSpec with Matchers {
+
+  private val workflowId = WorkflowIdentity(1L)
+  private val executionId = ExecutionIdentity(1L)
+
+  "RUDFSourceOpDesc.operatorInfo" should
+    "advertise the 1-out R UDF source (no inputs, one output)" in {
+    val info = (new RUDFSourceOpDesc).operatorInfo
+    info.userFriendlyName shouldBe "1-out R UDF"
+    info.operatorGroupName shouldBe OperatorGroupConstants.R_GROUP
+    info.inputPorts shouldBe empty
+    info.outputPorts should have length 1
+  }
+
+  "RUDFSourceOpDesc.sourceSchema" should "be empty by default and reflect the 
configured columns" in {
+    (new RUDFSourceOpDesc).sourceSchema().getAttributes shouldBe empty
+    val d = new RUDFSourceOpDesc
+    d.columns = List(new Attribute("a", AttributeType.STRING))
+    d.sourceSchema() shouldBe Schema().add(new Attribute("a", 
AttributeType.STRING))
+  }
+
+  "RUDFSourceOpDesc.getPhysicalOp" should
+    "wire OpExecWithCode(code, \"r-table\") as a source op with one output 
port" in {
+    val d = new RUDFSourceOpDesc
+    d.code = "data.frame(a=1)"
+    val physical = d.getPhysicalOp(workflowId, executionId)
+    physical.opExecInitInfo match {
+      case OpExecWithCode(code, language) =>
+        language shouldBe "r-table"
+        code shouldBe "data.frame(a=1)"
+      case other => fail(s"expected OpExecWithCode, got $other")
+    }
+    physical.outputPorts.keySet shouldBe 
d.operatorInfo.outputPorts.map(_.id).toSet
+  }
+
+  it should "reject a non-positive worker count" in {
+    val d = new RUDFSourceOpDesc
+    d.code = "x"
+    d.workers = 0
+    intercept[IllegalArgumentException] { d.getPhysicalOp(workflowId, 
executionId) }
+  }
+
+  "RUDFSourceOpDesc" should "round-trip its config fields through the 
polymorphic base" in {
+    val d = new RUDFSourceOpDesc
+    d.code = "f"
+    d.workers = 2
+    d.useTupleAPI = true
+    d.columns = List(new Attribute("a", AttributeType.STRING))
+    val restored = objectMapper.readValue(objectMapper.writeValueAsString(d), 
classOf[LogicalOp])
+    restored shouldBe a[RUDFSourceOpDesc]
+    val r = restored.asInstanceOf[RUDFSourceOpDesc]
+    r.code shouldBe "f"
+    r.workers shouldBe 2
+    r.useTupleAPI shouldBe true
+    r.columns shouldBe List(new Attribute("a", AttributeType.STRING))
+  }
+}

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