delta-harness: OpenHouse Iceberg behavioral test harness + guide - #682
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mkuchenbecker wants to merge 2 commits into
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delta-harness: OpenHouse Iceberg behavioral test harness + guide#682mkuchenbecker wants to merge 2 commits into
mkuchenbecker wants to merge 2 commits into
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Adds a self-contained Scala behavioral test harness that characterizes OpenHouse + Apache Iceberg table behavior end-to-end. The harness crosses a large matrix of table layouts (partitioning, MoR/CoW, ordered writes, nested types) with DDL, DML, maintenance, branching/WAP, streaming, and negative-path operations, asserting deltas against observed pre-state so each case holds under any layout. It runs locally against a real embedded OpenHouse catalog (harness/openhouse/Env.scala boots OpenHouseLocalServer + the OpenHouse Spark catalog; see run-openhouse.sh and HARNESS-GUIDE.md). The scenario and framework sources are also structured as a publishable Gradle library module (openhouse-spark-delta-harness_2.12) that excludes the embedded-only Env so downstream environments can supply their own adapter. Genuine product or upstream bugs are tagged in Plan.knownBugs with a prose explanation and skipped rather than silently passed, so the suite stays green while documenting the defect. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Adds TESTING-MATRIX.md, a living reference that explains the harness as a cross product of independent axes (operation family, data file format, partitioning, write mode, schema, preparation lineage, and reference routing). Documents how a case id reads, the CoreTable/NestedTypesTable/TypesTable schemas, the table layouts, the preparation lineages, and each operation family including the DDL sub-families. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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What
Adds
delta-harness, a self-contained Scala behavioral test harness that characterizes OpenHouse + Apache Iceberg table behavior end-to-end. It crosses a large matrix of table layouts (partitioning, MoR/CoW, ordered writes, nested types) with DDL, DML, maintenance, branching/WAP, streaming, and negative-path operations. Each case asserts deltas against the observed pre-state, so it holds under any layout.How it runs
harness/openhouse/Env.scalabootsOpenHouseLocalServerplus the OpenHouse Spark catalog. Seerun-openhouse.shandHARNESS-GUIDE.md.openhouse-spark-delta-harness_2.12) that excludes the embedded-onlyEnv, so a downstream environment can supply its own adapter and run the same matrix against a real cluster.TESTING-MATRIX.mddocuments the matrix as a cross product of axes (operation family, data file format, partitioning, write mode, schema, preparation lineage, and reference routing).Known bugs
Genuine product or upstream bugs are tagged in
Plan.knownBugswith a prose explanation and skipped rather than silently passed, so the suite stays green while documenting the defect.Status
Draft / work in progress. The library module compiles against
main. Full local-run verification (embedded server) and CI wiring are still in progress.Notes
Depends on
com.linkedin.iceberg:iceberg-spark-runtime-3.5_2.12(LinkedIn's published Iceberg fork), matching the rest of the OpenHouse Spark integration.Testing Done
main(:integrations:spark:openhouse-spark-delta-harness_2.12:compileScala)🤖 Generated with GitHub Copilot CLI