internal: Fix the six Windows-only native test failures and run the full suite there

.gitattributes

@@ -0,0 +1,5 @@
+# Normalize line endings to LF in every working tree, Windows included. Without this,
+# `actions/checkout` honours Windows' default `core.autocrlf=true` and checks out CRLF, so tests
+# that compare formatter output (LF) against a `stripMargin` source literal (CRLF) fail — e.g.
+# JSONTest and YAMLFormatterTest on the Scala Native (Windows) CI job.
+* text=auto eol=lf

.github/workflows/test.yml

@@ -205,18 +205,10 @@ jobs:
           echo "LIB=$libDir;$env:LIB" >> $env:GITHUB_ENV
           echo "$root\bin" >> $env:GITHUB_PATH
         shell: pwsh
-      # `testOnly` still links the whole native test binary, so both of uni's C shims get compiled and
-      # linked for Windows here; running the http suite then exercises uni_socket_shim.c (WSAStartup /
-      # WSAPoll / closesocket) and uni_curl_shim.c (GetProcAddress over EnumProcessModules) for real.
-      #
-      # Deliberately not the full `projectNative/test` yet. Six tests outside http fail on Windows, all
-      # of them predating this job and none socket-related: IOSymlinkTest (3 — uni itself raises
-      # `createSymlink is not supported on Scala Native + Windows`, so they want skipping there),
-      # IOPathTest's `resolve child path` (a Windows-naive expectation), and JSONTest /
-      # YAMLFormatterTest (their `stripMargin` literals arrive CRLF, as the repo has no .gitattributes,
-      # while the formatters emit LF). Fix those, then widen this step to projectNative/test.
-      - name: Scala Native test (http)
-        run: JVM_OPTS=-Xmx4g ./sbt "uniNative/testOnly wvlet.uni.http.*"
+      # Exercises uni_socket_shim.c (WSAStartup / WSAPoll / closesocket) and uni_curl_shim.c
+      # (GetProcAddress over EnumProcessModules) at runtime, not merely at compile time.
+      - name: Scala Native test
+        run: JVM_OPTS=-Xmx4g ./sbt "projectNative/test"
         shell: bash
       - name: Publish Test Report
         uses: mikepenz/action-junit-report@v6

adr/2026-07-08-native-socket-shim.md

@@ -128,18 +128,20 @@ same on both platforms. `winsock2.h` also supplies `POLLERR`, `POLLHUP` and
   now what would have caught v2026.1.17's `<dlfcn.h>` regression, and it exercises
   both shims at runtime. `NativeServerTest` passes 21/21 there, keep-alive and
   read timeouts (the `WSAPoll` timeout paths) and WebSocket upgrade included.
-- That job runs `uniNative/testOnly wvlet.uni.http.*`, not the full
-  `projectNative/test`. `testOnly` still links the entire test binary, so both
-  shims are compiled and linked for Windows either way. Six tests outside `http`
-  fail there, all predating the job and none socket-related — they are what stands
-  between this and the full suite:
-  - `IOSymlinkTest` (3): uni raises `createSymlink is not supported on Scala Native
-    + Windows`; the tests need skipping on that platform.
-  - `IOPathTest.resolve child path`: the expectation is Windows-naive.
-  - `JSONTest` / `YAMLFormatterTest`: their `stripMargin` literals arrive CRLF (the
-    repo has no `.gitattributes`, and `actions/checkout` leaves Windows'
-    `core.autocrlf=true`), while the formatters emit LF. `* text=auto eol=lf` would
-    fix both.
+- That job runs the full `projectNative/test`. It first landed scoped to
+  `wvlet.uni.http.*`, because six non-socket tests failed on Windows — all
+  predating the job, surfaced only once the binary could run there. They were then
+  fixed so the job could widen:
+  - `IOSymlinkTest` (3): symlinks are unsupported on Scala Native + Windows (uni's
+    own `createSymlink` / `readSymlink` throw there), so the tests `skip` when
+    `IOPath.isWindows`.
+  - `IOPathTest.resolve child path`: the expectation mixed a literal `/` prefix with
+    `IOPath.separator`; `.path` renders every separator with the platform's, so on
+    Windows it is `\home\user\...`. Built the expectation with `separator`
+    throughout, matching the sibling assertion.
+  - `JSONTest` / `YAMLFormatterTest`: their `stripMargin` literals arrived CRLF
+    (`actions/checkout` honours Windows' `core.autocrlf=true`) while the formatters
+    emit LF. A repo `.gitattributes` (`* text=auto eol=lf`) forces LF everywhere.
 - `NativeSocket` no longer imports `scalanative.posix.poll` or
   `scalanative.posix.unistd`. Re-adding either would re-break Windows; the CI job
   is what notices.

uni/src/test/scala/wvlet/uni/io/IOPathTest.scala

@@ -59,7 +59,11 @@ class IOPathTest extends UniTest:
   test("resolve child path") {
     val base  = IOPath.parse("/home/user")
     val child = base.resolve("docs/file.txt")
-    child.path shouldBe s"/home/user${IOPath.separator}docs${IOPath.separator}file.txt"
+    // `.path` renders every separator with the platform one, the leading segment included, so build
+    // the expectation the same way — on Windows this is `\home\user\docs\file.txt`. `.posixPath` is
+    // the forward-slash form.
+    val sep = IOPath.separator
+    child.path shouldBe s"${sep}home${sep}user${sep}docs${sep}file.txt"
     child.posixPath shouldBe "/home/user/docs/file.txt"
   }
 

uni/src/test/scala/wvlet/uni/io/IOSymlinkTest.scala

@@ -20,7 +20,15 @@ class IOSymlinkTest extends UniTest:
 
   private lazy val testDir: IOPath = FileSystem.createTempDirectory("symlink-test")
 
+  // Scala Native on Windows has no POSIX symlink support: FileSystem.createSymlink / readSymlink
+  // throw UnsupportedOperationException there by design (MSVC's CRT exports no `symlink`/`readlink`).
+  // `inline` so `skip`'s TestSource resolves to the calling test, not this helper.
+  private inline def requireSymlinkSupport(): Unit =
+    if IOPath.isWindows then
+      skip("Symlinks are not supported on Scala Native + Windows")
+
   test("createSymlink and readSymlink for a file") {
+    requireSymlinkSupport()
     val target = testDir / "target.txt"
     val link   = testDir / "link.txt"
 
@@ -33,6 +41,7 @@ class IOSymlinkTest extends UniTest:
   }
 
   test("info reports SymbolicLink type") {
+    requireSymlinkSupport()
     val target = testDir / "info-target.txt"
     val link   = testDir / "info-link.txt"
 
@@ -44,6 +53,7 @@ class IOSymlinkTest extends UniTest:
   }
 
   test("createSymlink for a directory") {
+    requireSymlinkSupport()
     val targetDir = testDir / "target-dir"
     val linkDir   = testDir / "link-dir"