lib: migrate every test file to the canonical *_test.ww name

25 renames (git mv, content untouched). _test.ww is what the package
coordinator's test detection and the sep loader's canonical exclusion
key on; the old *test.ww spellings survived only through the
line-leading-@test compatibility scan. Consumers updated in place:
LIBRARY_TESTS, the libbyteid roster, the 901/974/975/976 carriers that
copy or invoke these files, and the check.c/check.ww + path/ftos
comments that cite them. Closes the open-driver-work migration bullet.

Makefile

@@ -396,23 +396,23 @@ $(BIN)/test_%: test/wcc/%.c test/wcc/wwtestpkg.h $(LIB)/libwcc.a | $(BIN)
 
 # Native library tests execute their source owner directly.  The retired C
 # launchers added no assertion beyond this exit status.
-LIBRARY_TESTS = lib/errors/errnotest.ww lib/ascii/asciitest.ww \
-	  lib/ww/syntax/toktest.ww lib/ww/syntax/asttest.ww \
-	  lib/ww/syntax/symtest.ww \
-	  lib/strconv/test/ftostest.ww lib/strconv/test/stoftest.ww \
-	  lib/strconv/test/inttest.ww lib/strings/stringstest.ww \
-	  lib/bytes/bytestest.ww lib/encoding/utf8/utf8test.ww \
-	  lib/bufio/bufiotest.ww lib/math/random/random_test.ww \
-	  lib/math/checked/checked_test.ww lib/fmt/fmttest.ww \
-	  lib/log/logtest.ww lib/fnmatch/fnmatchtest.ww \
-	  lib/shlex/shlextest.ww lib/time/timetest.ww \
-	  lib/encoding/hex/hextest.ww lib/memio/memiotest.ww \
-	  lib/temp/temptest.ww lib/getopt/getopttest.ww \
+LIBRARY_TESTS = lib/errors/errno_test.ww lib/ascii/ascii_test.ww \
+	  lib/ww/syntax/tok_test.ww lib/ww/syntax/ast_test.ww \
+	  lib/ww/syntax/sym_test.ww \
+	  lib/strconv/test/ftos_test.ww lib/strconv/test/stof_test.ww \
+	  lib/strconv/test/int_test.ww lib/strings/strings_test.ww \
+	  lib/bytes/bytes_test.ww lib/encoding/utf8/utf8_test.ww \
+	  lib/bufio/bufio_test.ww lib/math/random/random_test.ww \
+	  lib/math/checked/checked_test.ww lib/fmt/fmt_test.ww \
+	  lib/log/log_test.ww lib/fnmatch/fnmatch_test.ww \
+	  lib/shlex/shlex_test.ww lib/time/time_test.ww \
+	  lib/encoding/hex/hex_test.ww lib/memio/memio_test.ww \
+	  lib/temp/temp_test.ww lib/getopt/getopt_test.ww \
 	  lib/encoding/base32/base32_test.ww \
 	  lib/encoding/base64/base64_test.ww \
 	  lib/hash/adler32/adler32_test.ww lib/hash/crc16/crc16_test.ww \
 	  lib/hash/crc32/crc32_test.ww lib/hash/crc64/crc64_test.ww \
-	  lib/path/pathtest.ww lib/crypto/sha256/sha256_test.ww \
+	  lib/path/path_test.ww lib/crypto/sha256/sha256_test.ww \
 	  lib/hash/siphash/siphash_test.ww
 
 # These real sources have a standalone-compilation contract that is not

cmd/wcc/check.c

@@ -2900,7 +2900,7 @@ src_imports(Node *file, const char *modtag, const char *name)
 	if (file == NULL || name == NULL || name[0] == '\0') return 0;
 	for (Node *u = file->list; u; u = u->next) {
 		if (u->kind != N_USE) continue;
-		/* Skip self-imports: lib/fmt/fmttest.ww carries `use fmt;`
+		/* Skip self-imports: lib/fmt/fmt_test.ww carries `use fmt;`
 		 * even though its module tag is also "fmt"; that directive
 		 * doesn't introduce a foreign module bareword and lib/fmt's
 		 * own `fn bsprintf(fmt: str, ...)` is not a shadow of it. */

docs/test-system-v2.md

@@ -310,9 +310,6 @@ drift:
   single-threaded by design today).
 - A package-level `-o` contract (single-file `ww test -o` exists; directory
   packages publish fixed `<package>.test` stems under `-c`).
-- Universal `*_test.ww` filename migration for library tests (several
-  library suites still use the older `*test.ww` names, enumerated by
-  `LIBRARY_TESTS` and the `989_lib_byteid` roster).
 - The remaining invalid-`@test` attribute-shape diagnostics (exported
   tests, prototypes, arguments, variadics, non-void returns, duplicate
   annotations) with stable text in both frontends.

lib/path/path_test.ww

@@ -1,5 +1,5 @@
 // pathtest — exercises lib/path (c2-stack subset). Run with
-// `out/bin/ww run lib/path/pathtest.ww`. A failing row aborts via the
+// `out/bin/ww run lib/path/path_test.ww`. A failing row aborts via the
 // assert/abort builtin (task #5 @test conversion).
 //
 // Vectors mirror Hare's @test fns in ref/hare/path/stack.ha:77-119
@@ -7,7 +7,7 @@
 // to c3 (abs/local unimplemented); only the relative rows run here.
 //
 // Parallel `[N]str` row arrays (rather than `[N]struct{...}`) sidestep
-// the cstage cgen chained `arr[i].field` store gap (getopttest.ww:6).
+// the cstage cgen chained `arr[i].field` store gap (getopt_test.ww:6).
 // push is stateful, so each row is applied in sequence to one buffer;
 // the table holds {segment, expected-string} pairs (stack.ha:36-42 is
 // the normalization spec these rows encode).

lib/strconv/test/ftos_test.ww

@@ -1,5 +1,5 @@
 // ftostest — exercises lib/strconv/ftos.ww (Hare ftos.ha / ftos_ryu.ha
-// Ryū port). Run with `out/bin/ww run lib/strconv/test/ftostest.ww`.
+// Ryū port). Run with `out/bin/ww run lib/strconv/test/ftos_test.ww`.
 // A failing row aborts via the assert/abort builtin (task #5 @test
 // conversion).
 //

selfhost/cmd/wcc/check.ww

@@ -218,7 +218,7 @@ fn srcimports(file: *syntax.node, modtag: str, name: str) bool = {
 	let u: *syntax.node = file.list;
 	for (u != nil) {
 		if (u.kind == syntax.nkind.N_USE) {
-			// Skip self-imports: lib/fmt/fmttest.ww carries
+			// Skip self-imports: lib/fmt/fmt_test.ww carries
 			// `use fmt;` while its module tag is also "fmt".
 			// That directive doesn't introduce a foreign
 			// module bareword and lib/fmt's own

test/byteid/libbyteid_test.ww

@@ -104,12 +104,12 @@ fn corpus() []ent = {
 	for (z < es.len) { zeroent(&es[z]); z += 1; };
 	let n: i32 = 0;
 	let k: *i32 = &n;
-	fx(es, k, "lib/bytes/bytestest.ww");
-	fx(es, k, "lib/dirs/dirstest.ww");
+	fx(es, k, "lib/bytes/bytes_test.ww");
+	fx(es, k, "lib/dirs/dirs_test.ww");
 	fx(es, k, "lib/encoding/base32/base32_test.ww");
-	fx(es, k, "lib/encoding/hex/hextest.ww");
-	fx(es, k, "lib/encoding/utf8/utf8test.ww");
-	fx(es, k, "lib/getopt/getopttest.ww");
+	fx(es, k, "lib/encoding/hex/hex_test.ww");
+	fx(es, k, "lib/encoding/utf8/utf8_test.ww");
+	fx(es, k, "lib/getopt/getopt_test.ww");
 	fx(es, k, "lib/hash/adler32/adler32_test.ww");
 	fx(es, k, "lib/hash/crc16/crc16_test.ww");
 	fx(es, k, "lib/hash/crc32/crc32_test.ww");
@@ -117,19 +117,19 @@ fn corpus() []ent = {
 	fx(es, k, "lib/hash/siphash/siphash_test.ww");
 	fx(es, k, "lib/math/checked/checked_test.ww");
 	fx(es, k, "lib/math/random/random_test.ww");
-	fx(es, k, "lib/memio/memiotest.ww");
-	fx(es, k, "lib/os/ostest.ww");
+	fx(es, k, "lib/memio/memio_test.ww");
+	fx(es, k, "lib/os/os_test.ww");
 	pr(es, k, "package main;\nimport os.exec;\nfn main() i32 = { return 0; };\n",
 		"package exec;", "lib/os/exec");
 	fx(es, k, "lib/regex/regex_test.ww");
-	fx(es, k, "lib/strconv/test/ftostest.ww");
-	fx(es, k, "lib/strconv/test/stoftest.ww");
-	fx(es, k, "lib/strconv/test/inttest.ww");
-	fx(es, k, "lib/strings/stringstest.ww");
-	fx(es, k, "lib/temp/temptest.ww");
-	fx(es, k, "lib/time/timetest.ww");
-	fx(es, k, "lib/bufio/bufiotest.ww");
-	fx(es, k, "lib/fmt/fmttest.ww");
+	fx(es, k, "lib/strconv/test/ftos_test.ww");
+	fx(es, k, "lib/strconv/test/stof_test.ww");
+	fx(es, k, "lib/strconv/test/int_test.ww");
+	fx(es, k, "lib/strings/strings_test.ww");
+	fx(es, k, "lib/temp/temp_test.ww");
+	fx(es, k, "lib/time/time_test.ww");
+	fx(es, k, "lib/bufio/bufio_test.ww");
+	fx(es, k, "lib/fmt/fmt_test.ww");
 	pr(es, k, "package main;\nimport sort;\nfn main() i32 = { return 0; };\n",
 		"package sort;", "lib/sort");
 	pr(es, k, "package main;\nimport path;\nfn main() i32 = { return 0; };\n",
@@ -154,17 +154,17 @@ fn corpus() []ent = {
 	// from the retired 815/940/951 driver-parity carriers. No
 	// sentinel: there is no dep unit to prove.
 	pr(es, k, "package main;\nfn main() i32 = { return 0; };\n", "", "");
-	fx(es, k, "lib/ascii/asciitest.ww");
+	fx(es, k, "lib/ascii/ascii_test.ww");
 	fx(es, k, "lib/encoding/base64/base64_test.ww");
-	fx(es, k, "lib/errors/errnotest.ww");
-	fx(es, k, "lib/log/logtest.ww");
-	fx(es, k, "lib/os/stattest.ww");
+	fx(es, k, "lib/errors/errno_test.ww");
+	fx(es, k, "lib/log/log_test.ww");
+	fx(es, k, "lib/os/stat_test.ww");
 	// toktest/asttest resolve `import syntax` via -I lib/ww, cf 905
-	fxi(es, k, "lib/ww/syntax/toktest.ww", "lib/ww");
-	fxi(es, k, "lib/ww/syntax/asttest.ww", "lib/ww");
+	fxi(es, k, "lib/ww/syntax/tok_test.ww", "lib/ww");
+	fxi(es, k, "lib/ww/syntax/ast_test.ww", "lib/ww");
 	fx(es, k, "lib/crypto/sha256/sha256_test.ww");
-	fx(es, k, "lib/fnmatch/fnmatchtest.ww");
-	fx(es, k, "lib/shlex/shlextest.ww");
+	fx(es, k, "lib/fnmatch/fnmatch_test.ww");
+	fx(es, k, "lib/shlex/shlex_test.ww");
 	assert(n == NENTEXPECT);
 	return es;
 };

test/wcc/901_asserttyped_gap.c

@@ -151,7 +151,7 @@ main(void)
 		  "B fn-ptr struct-field call", 0, 1 },
 		{ "lib/encoding/utf8/utf8.ww",
 		  "C abort intrinsic callee", 0, 1 },
-		{ "lib/fnmatch/fnmatchtest.ww",
+		{ "lib/fnmatch/fnmatch_test.ww",
 		  "D module-leaf == type/fn name", 0, 1 },
 		{ "lib/math/random/random_test.ww",
 		  "D module-leaf == type/fn name", 0, 1 },

test/wcc/974_getenv_run.c

@@ -2,13 +2,13 @@
  * 974_getenv_run — execute the lib/os getenv smoke fixture under the
  * C-side `ww run` driver and assert exit 0.
  *
- * Pre-arranges the environment that lib/os/ostest.ww asserts against:
+ * Pre-arranges the environment that lib/os/os_test.ww asserts against:
  *
  *   WW_TEST_GETENV   = "hello-world"   (set, non-empty)
  *   WW_TEST_EMPTY    = ""              (set, empty value)
  *   WW_TEST_NOT_SET  unset             (unsetenv-cleared)
  *
- * The child `ww run` process inherits this env, so ostest.ww's
+ * The child `ww run` process inherits this env, so os_test.ww's
  * `os.getenv` calls see exactly the state we configured here. This
  * is the "C-side env arrangement" pattern (parent sets, child reads)
  * — proper POSIX shape for stdlib testing without a `setenv` ww
@@ -46,12 +46,12 @@ main(void)
 	char cwd[1024];
 	if (getcwd(cwd, sizeof cwd) == NULL) return 1;
 
-	/* Pre-arrange the env state ostest.ww asserts against. */
+	/* Pre-arrange the env state os_test.ww asserts against. */
 	setenv("WW_TEST_GETENV", "hello-world", 1);
 	setenv("WW_TEST_EMPTY", "", 1);
 	unsetenv("WW_TEST_NOT_SET");
 
-	const char *src = "lib/os/ostest.ww";
+	const char *src = "lib/os/os_test.ww";
 	char path[1024], cmd[2048];
 	snprintf(path, sizeof path, "%s/%s", cwd, src);
 	snprintf(cmd, sizeof cmd, "%s/ww test %s", bin, path);

test/wcc/975_dirs_run.c

@@ -5,9 +5,9 @@
  * Workflow:
  *   1. mkdtemp /tmp/wwdirs-XXXXXX  — fresh per run, no cross-run
  *      stale state, no parallel-test conflicts.
- *   2. setenv the four cohort env states (see lib/dirs/dirstest.ww
+ *   2. setenv the four cohort env states (see lib/dirs/dirs_test.ww
  *      file header for the contract).
- *   3. exec `ww test lib/dirs/dirstest.ww`. The fixture reads
+ *   3. exec `ww test lib/dirs/dirs_test.ww`. The fixture reads
  *      WW_TEST_TMPDIR + the XDG_/HOME envs and asserts.
  *   4. Remove the exact auto-created child dirs bottom-up, then the
  *      mkdtemp-owned root.
@@ -63,7 +63,7 @@ main(void)
 	unsetenv("XDG_STATE_HOME");
 	setenv("WW_TEST_TMPDIR", tmpl, 1);
 
-	const char *src = "lib/dirs/dirstest.ww";
+	const char *src = "lib/dirs/dirs_test.ww";
 	char path[1024], cmd[2048];
 	snprintf(path, sizeof path, "%s/%s", cwd, src);
 	snprintf(cmd, sizeof cmd, "%s/ww test %s", bin, path);

test/wcc/976_stat_run.c

@@ -10,9 +10,9 @@
  *        <tmp>/symlink   →  ./regfile  (relative symlink)
  *        <tmp>/subdir       directory, mode 0700
  *   3. setenv WW_TEST_STAT_REGFILE / SYMLINK / SUBDIR / NOENT with
- *      the absolute paths; lib/os/stattest.ww reads them via
+ *      the absolute paths; lib/os/stat_test.ww reads them via
  *      os.getenv and exercises stat/lstat/fstat/exists.
- *   4. exec `ww test lib/os/stattest.ww`.
+ *   4. exec `ww test lib/os/stat_test.ww`.
  *   5. Remove the exact children and then the mkdtemp-owned root.
  *
  * Same wrapper shape as 970-975; cleanup runs on success and failure.
@@ -62,7 +62,7 @@ main(void)
 	snprintf(symlink_path, sizeof symlink_path, "%s/symlink", tmpl);
 	snprintf(subdir, sizeof subdir, "%s/subdir", tmpl);
 	snprintf(noent, sizeof noent, "%s/does-not-exist", tmpl);
-	const char *src = "lib/os/stattest.ww";
+	const char *src = "lib/os/stat_test.ww";
 	int fail = 0, subdir_owned = 0;
 
 	/* Populate. */