[bfrancojr]

Both Java tiers now run every test file in the spec's per-port corpus, from one copy that CI keeps equal to the spec. Before, the lite tier ran hand-typed copies of 2 of the 12 folders and none of the rest, and nothing noticed when the spec changed a file.

Fixes #211.

What changes

• One copy. testdata/<dir> is protowire's testdata/<dir> byte for byte, schemas included: annotations, any, bigfloat, blocks, dataset, duplicates, duration, keyed, map-keys, nulls, repeated, strings, plus test.proto. It replaces the copies under pxf/src/test/resources and pxf/src/test/proto, which were taken from spec 234cf29 and had fallen behind (they lacked protowire#569's three required-field files).
• Full tier. It compiles those schemas and runs their files. SpecCorpusTest adds the three folders it never ran (annotations, duration, repeated). It also fails if a copied folder has no test.
• Lite tier. lite-fixtures generates lite classes from the same schemas. The java_package option that the lite plugin requires is added at build time, so no edited copy is checked in. LiteCorpusTest runs every file through LiteWireWriter, and through LiteWireReader where the corpus gives expected bytes or text.
• Known gaps. A file a tier doesn't handle yet is listed against its open issue. A listed file that starts passing fails the test, so the list only shrinks.
• CI. scripts/check-spec-corpus.sh runs in the conformance job against spec main. It fails when a copy differs from the spec, or when the spec has a corpus folder that is neither copied nor listed with what covers it instead.

What the first run found

Lite gaps, each filed and listed:

• pxf lite: an Any block's @type entry is refused, so documents Go reads fail on lite #213: an Any block that starts with @type is refused on lite (5 files).
• pxf lite: a scalar or an assigned block on a repeated field is accepted #214: lite accepts a plain value, or a = { } block, bound to a repeated field (2 files).
• pxf lite: three errors (bool map key, repeated oneof member, repeated int map key) don't say what Go says #215: three lite error messages differ from Go's.
• pxf lite: two null errors are raw IllegalArgumentException, not PxfException #191, wider than filed: lite throws IllegalArgumentException instead of PxfException for 3 files. The lite writer has 26 such throw sites; I commented the evidence on pxf lite: two null errors are raw IllegalArgumentException, not PxfException #191.
• pxf lite: no @dataset row binding, so a row that breaks its type is not rejected #212, filed with this PR: lite has no @dataset row binding, so only the parse-level verdicts run.

Both tiers: the 3 required-field null files from protowire#569 (#189, which is the next PR).

Evidence

• ./gradlew build --rerun-tasks with the CI plugin pin (-Dorg.gradle.project.pxfJavaMeta.repo=/nonexistent): BUILD SUCCESSFUL, 947 tests, 0 failures, every result file freshly written. That count reconciles with main's: +7 SpecCorpusTest, +1 gap-existence check, +123 LiteCorpusTest cases, −19 hand-typed LiteTablesTest rows.
• LiteCorpusTest runs 123 cases: 110 files plus 13 named tests. I counted the files by hand per folder to reconcile.
• The gap check fires both ways. Before listing, each gap failed with the messages quoted in pxf lite: an Any block's @type entry is refused, so documents Go reads fail on lite #213–pxf lite: three errors (bool map key, repeated oneof member, repeated int map key) don't say what Go says #215. With a passing file (blocks/space-in-block.pxf) listed as a gap, the test fails with meets its verdict now: drop it from KNOWN_GAPS (#0).
• scripts/check-spec-corpus.sh against spec main 8e08cd9: testdata/: 12 directories match the spec's. Against spec 234cf29, with a made-up folder added, it names annotations, dataset, keyed and nulls as differing, and flags newcorpus as neither copied nor listed.
• The spec's cross_envelope_check.sh at 8e08cd9, against this branch, with both lite legs on (WITH_JAVA_LITE=1, WITH_JAVA_PXF_LITE=1), exited 0. All 6 ports write identical envelope bytes, and every annotation and wire-vector row is ok for java-lite and java-pxf-lite. Rust, Swift, Dart and C# were off.
• Not run locally: the text, write and security gates. They drive check-decode and check-decode-android, which this PR doesn't touch. This PR's conformance job runs them.

Also fixed

• pxf-android's KeyedLiteTest reads testdata/keyed/, not the deleted pxf/src/test/resources/keyed/.
• The struct-binding table step in CI no longer skips when spec main has no values.tsv. protowire#518 merged, and the table matches (cmp clean).

[bfrancojr]

CI on head a314fb7 (run 42518398723): Build + Test and Conformance passed.

• The new step "Spec corpus copy matches the spec's" ran against spec main and printed testdata/: 12 directories match the spec's.
• The build job's log has 123 LiteCorpusTest > ... PASSED lines and 7 SpecCorpusTest > ... PASSED lines, which are the counts the PR body gives.
• The text, write and security gates passed in the conformance job, with java-lite required.