wwtest: native package-test coordinator

Single-directory package-test planner: discovers *.ww, groups white-box
and external <pkg>_test sources, composes the combined test package,
builds it through the sibling ww driver, and runs it with the runtime's
-package/-list/-timeout-ms contract. test/package holds its E2E corpus
and the manual runtime fixture set.

test/package/cases/assert_failure/assert_failure_test.ww

@@ -0,0 +1,5 @@
+package assert_failure_test;
+
+@test fn assertion_failure() void = {
+	assert(false, "synthetic assertion failure");
+};

test/package/cases/descendant/descendant_test.ww

@@ -0,0 +1,25 @@
+package descendant_test;
+
+import os;
+
+@test fn normal_return_clears_descendant() void = {
+	let ready: [2]i32;
+	assert(os.pipe(&ready) == 0);
+	let pid: i32 = os.fork();
+	assert(pid >= 0);
+	if (pid == 0) {
+		os.close(ready[0]);
+		let mask: u64 = 1u64 << ((os.SIGTERM - 1): u64);
+		if (os.sigprocmask(os.SIG_BLOCK, &mask, nil: *u64) != 0) {
+			os.exit(120);
+		};
+		let b: [1]u8 = [1u8];
+		if (os.write(ready[1], &b[0], 1u64) != 1i64) { os.exit(121); };
+		os.close(ready[1]);
+		for (true) { };
+	};
+	os.close(ready[1]);
+	let b: [1]u8;
+	assert(os.read(ready[0], &b[0], 1u64) == 1i64);
+	os.close(ready[0]);
+};

test/package/cases/multi_fail/multi_fail_test.ww

@@ -0,0 +1,5 @@
+package multi_fail_test;
+
+@test fn first_failure() void = { assert(false); };
+@test fn second_failure() void = { assert(false); };
+@test fn continuation_after_failures() void = { assert(true); };

test/package/cases/nonzero/nonzero_test.ww

@@ -0,0 +1,5 @@
+package nonzero_test;
+
+import os;
+
+@test fn deliberate_nonzero_exit() void = { os.exit(7); };

test/package/cases/pass/pass_test.ww

@@ -0,0 +1,18 @@
+package pass_test;
+
+import test;
+
+@test fn alpha_pass() void = {
+	assert(test.current() == "pass_test.alpha_pass");
+};
+
+@test fn beta_skip() void = {
+	test.skip("synthetic unavailable feature");
+};
+
+@test fn gamma_expected_abort() void = {
+	test.expectabort();
+	abort();
+};
+
+@test fn delta_pass() void = { assert(6 * 7 == 42); };

test/package/cases/premature/premature_test.ww

@@ -0,0 +1,5 @@
+package premature_test;
+
+import os;
+
+@test fn clean_exit_without_completion() void = { os.exit(0); };

test/package/cases/signal/signal_test.ww

@@ -0,0 +1,7 @@
+package signal_test;
+
+import os;
+
+@test fn signal_is_not_exit() void = {
+	os.kill(os.getpid(), os.SIGTERM);
+};

test/package/cases/timeout/timeout_test.ww

@@ -0,0 +1,16 @@
+package timeout_test;
+
+import os;
+
+@test fn timeout_clears_term_resistant_descendant() void = {
+	let pid: i32 = os.fork();
+	assert(pid >= 0);
+	if (pid == 0) {
+		let mask: u64 = 1u64 << ((os.SIGTERM - 1): u64);
+		if (os.sigprocmask(os.SIG_BLOCK, &mask, nil: *u64) != 0) {
+			os.exit(120);
+		};
+		for (true) { };
+	};
+	for (true) { };
+};