The GitHub Actions job "Benchmarks PR Comment" on texera.git/main has succeeded.
Run started by GitHub user bobbai00 (triggered by bobbai00).

Head commit for run:
24b587fcbf30bce1a4614a22bbf1c5a6ad1e158e / Xinyuan Lin <[email protected]>
test(workflow-core): fill uncovered branches in tuple and type utilities (#6055)

### What changes were proposed in this PR?

Fill uncovered code paths in five `workflow-core` tuple/type utility
classes, selected from the Codecov report (not spec-name gaps). No
production-code changes.

| File | Codecov before | Missed lines targeted |
| --- | --- | --- |
| `Tuple.scala` | 54.1% | 24 — `getField` miss/Attribute overload,
`enforceSchema`, equals branches (incl. binary contents / non-Tuple),
`getPartialTuple`, `toString`, size/type-mismatch throws, 3-arg builder
`add` + null guards, case-class synthetics |
| `TupleLike.scala` | 12.8% | 32 — `SeqTupleLike`/`MapTupleLike`
`enforceSchema` (positional vs name-based, null fill, extras dropped),
`inMemSize` `???`, all seven `TupleLike.apply` overloads, the
`NotAnIterable` guard implicit |
| `AttributeType.java` | 47.2% | 18 — `getName` ANY branch (`""`), the
full `getAttributeType(Class)` mapping incl. primitive/unknown fallback
to ANY |
| `AttributeTypeUtils.scala` | 71.7% | 20 (+29 partials) —
`SchemaCasting`, `tupleCasting`, both `parseFields` overloads,
null-inference early-returns, BINARY/ANY inference fallback, LONG/DOUBLE
`compare`, unsupported-type throws, forced-parse failures |
| `ArrowUtils.scala` | 67.8% | 15 —
`appendTexeraTuple`/`setTexeraTuple`/`getTexeraTuple` round-trip (all 7
types + nulls + row indices), parse-failure → null field,
`fromAttributeType(null)` throw, unrecognized `texera_type` metadata
fallback |

Extends the existing `TupleSpec`, `AttributeTypeUtilsSpec`, and
`ArrowUtilsSpec` (the operator-module `ArrowUtilsSpec` doesn't attribute
coverage to `workflow-core` sources), and adds `TupleLikeSpec` /
`AttributeTypeSpec`.

Behavior notes pinned along the way: `$attrType` error messages render
the lowercase wire name; the `NotAnIterable` iterable-guard implicit is
not summoned for multi-iterable varargs under Scala 2.13 inference
(pinned by direct invocation).

### Any related issues, documentation, discussions?

Follow-up to the review feedback on #6043: prioritize tests that fill
uncovered code paths.

### How was this PR tested?

- `sbt "WorkflowCore/testOnly *TupleSpec *TupleLikeSpec
*AttributeTypeSpec *AttributeTypeUtilsSpec
org.apache.texera.amber.util.ArrowUtilsSpec"` — 105 tests, all green
- `sbt "WorkflowCore/Test/scalafmtCheck"` and `sbt
"WorkflowCore/scalafixAll --check"` — clean
- CI + Codecov delta to confirm

### Was this PR authored or co-authored using generative AI tooling?

Generated-by: Claude Code (Opus 4.8 [1M context])

Report URL: https://github.com/apache/texera/actions/runs/28579929377

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