Hojun-Cho
93b671808c
Mirror Hare's os env surface: getenvs() builds an owned []str of NAME=VALUE entries from the rt_envp table (platform_environ.ha:41), and getenv iterates it (environ.ha:32) so there is exactly one env walker. strings.dup is unusable here -- lib/strings imports os, so os importing strings would cycle; the owned copy is inlined (dup.ha:7). test_getenvs_entries pins the []str shape non-vacuously.
137 lines
4.1 KiB
Plaintext
137 lines
4.1 KiB
Plaintext
// ostest — exercises lib/os surface that doesn't have a dedicated
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// test elsewhere. Covers [[os.getenv]] (against env state pre-
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// arranged by test/wcc/974_getenv_run.c) and a direct
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// [[os.alloc]] / [[os.free]] roundtrip. memio's tests indirectly
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// cover alloc/free; the direct row here pins the FFI shape under
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// lib/os itself so future bindings refactors can't quietly drift.
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//
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// Hand-rolled @test fns dispatched from `main()` in source order; a
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// failing case aborts via the assert/abort builtin (task #5 @test
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// conversion).
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//
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// Pre-arranged env state (set by 974_getenv_run.c via setenv/unsetenv
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// before exec'ing `ww run lib/os/ostest.ww`):
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//
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// WW_TEST_GETENV = "hello-world"
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// WW_TEST_EMPTY = "" (set, but value is empty)
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// WW_TEST_NOT_SET unset
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//
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// Don't `use io;` here — lib/os and lib/io both export read/write/
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// close as C symbols that collide under the driver's flat-scope
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// concat (task #17). os alone is sufficient: getenv + alloc/free are
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// the only primitives needed.
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package os_test;
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import os;
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import rt;
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fn streq(a: str, b: str) bool = {
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if (a.len != b.len) { return false; };
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let i: i32 = 0;
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for (i < a.len) {
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if (a[i] != b[i]) { return false; };
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i += 1;
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};
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return true;
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};
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// ---- getenv: set var → matching value -------------------------------
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@test fn test_getenv_set() void = {
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let r = os.getenv("WW_TEST_GETENV");
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match (r) {
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case void => abort();
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case let s: str => {
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assert(!(!streq(s, "hello-world")));
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};
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};
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};
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// ---- getenv: empty value (set but zero-length) ----------------------
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//
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// POSIX permits an env var with an empty value (`name=` in environ).
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// getenv must return the empty str, NOT void — void is reserved for
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// "name not present at all". This row exercises the boundary.
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@test fn test_getenv_empty() void = {
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let r = os.getenv("WW_TEST_EMPTY");
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match (r) {
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case void => abort();
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case let s: str => {
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assert(!(s.len != 0));
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};
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};
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};
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// ---- getenv: unset var → void ---------------------------------------
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@test fn test_getenv_unset() void = {
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let r = os.getenv("WW_TEST_NOT_SET");
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match (r) {
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case void => {};
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case let s: str => abort();
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};
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};
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// ---- getenv: prefix-collision guard ---------------------------------
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//
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// Probes that "WW_TEST_GETEN" (a prefix of WW_TEST_GETENV) doesn't
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// match. Without the explicit `entry[name.len] == '='` check in
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// getenv, a naive prefix matcher would return the value of any
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// longer-named var that starts with the queried name.
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@test fn test_getenv_prefix_no_match() void = {
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let r = os.getenv("WW_TEST_GETEN");
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match (r) {
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case void => {};
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case let s: str => abort();
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};
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};
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// ---- getenvs: direct non-vacuous coverage of the []str shape --------
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//
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// getenvs() is public API (task #28) and the single env walker getenv
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// routes through. getenv's cases exercise the walk transitively, but
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// none asserts the []str RETURN shape — its count or "NAME=VALUE" entry
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// text. This row pins both: the slice must be non-empty, and every
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// expected entry must appear verbatim (name, '=', value duped intact).
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// Fails if getenvs miscounts (len 0 → the inner search finds nothing)
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// or dups the wrong bytes (off-by-one truncation → no streq match).
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// The "WW_TEST_EMPTY=" row also pins the empty-value entry text.
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@test fn test_getenvs_entries() void = {
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let env: []str = os.getenvs();
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assert(!(env.len == 0));
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let want: [2]str = ["WW_TEST_GETENV=hello-world", "WW_TEST_EMPTY="];
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let w: i32 = 0;
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for (w < 2) {
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let found: bool = false;
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let i: i32 = 0;
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for (i < env.len) {
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if (streq(env[i], want[w])) { found = true; };
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i += 1;
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};
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assert(found);
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w += 1;
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};
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};
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// ---- alloc/free: mmap-backed runtime allocator ----------------------
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//
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// Direct round-trip. Write-then-read-back proves the returned page is
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// dereferenceable. A miscompiled binding (wrong arg order, wrong ABI,
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// etc.) would either fault or return zero here.
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@test fn test_alloc_free_roundtrip() void = {
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let p: []u8 = alloc([], 4096u64)!;
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p.len = 4096;
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p[0] = 90u8; // 0x5a
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p[4095] = 165u8; // 0xa5
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assert(!(p[0] != 90u8));
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assert(!(p[4095] != 165u8));
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os.free(p.ptr: *void, 4096u64);
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};
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