test: pin cross-tier import-text behavior (22.13 compat / 24.4 fast / 26.5 native)

[colinhacks]

Pins the cross-tier text-import (with { type: "text" }) behavior #395 shipped, with two version-pinned e2e tests in version_tiers.rs that #395 lacked (it shipped inline unit tests plus the host-Node compat-tier case):

• Node 24.4.0 (fast tier below 26.5) — served by nub's own loadTextImport short-circuit; the host-Node integration.rs cases migrate to the native path once the host reaches >= 26.5, leaving [22.15, 26.5) otherwise uncovered.
• Node 26.5.0 (native) — deferred to Node's --experimental-import-text; asserts byte-identical output to the other tiers and that the experimental warning stays suppressed.

Tests-only; no runtime/impl change. All 10 version_tiers tests pass against main across the three real Node versions.

Refs #395

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Project	Deployment	Actions	Updated (UTC)
nub	Ready	Preview, Comment	Jul 9, 2026 8:34pm

[pullfrog]

ℹ️ No critical issues — one doc-comment inaccuracy inline.

Reviewed changes — two version-pinned e2e tests added to version_tiers.rs, closing the tier gaps that #395's inline unit tests and host-Node integration.rs cases left uncovered.

• Pin the fast tier below 26.5 — import_text_works_on_fast_tier_below_26_5 runs against Node 24.4.0, asserting with { type: "text" } is served by nub's own loadTextImport short-circuit.
• Pin the native tier — import_text_works_via_native_on_26_5 runs against Node 26.5.0, asserting byte-identical output to the other tiers (proving the native-defer mechanism swap is transparent) and that the ExperimentalWarning stays suppressed.

Both reuse the established run_nub_against_node helper (PATH-pinned Node, skip-if-absent) and the shared tests/fixtures/import-text fixture. Assertions match the fixture output shape, and every impl claim traces to a real symbol: --experimental-import-text injection over [26.5.0, ∞) (feature_matrix.rs, flags.rs), the additive --disable-warning=ExperimentalWarning, and the native step-aside via NATIVE_IMPORT_TEXT in preload-common.cjs. The two tests faithfully mirror the existing import_text_works_on_compat_tier.

  ^{｜ Fix all ➔ ｜ Fix 👍s ➔ ｜ View workflow run ｜ Using Claude Opus ｜ 𝕏}

[colinhacks]

Shipped in v0.4.6: https://github.com/nubjs/nub/releases/tag/v0.4.6