A PDF that cannot be read fails its look with its path and why

A truncated PDF said only look: <error>, with no path, where an image that cannot be read names both. It now says look: <path>: not a PDF pardes can read: <why>.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index ebb85609..a11bfeda 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -2140,6 +2140,23 @@ test "a corrupt image fails its look with an err, and no pane is made" {
     try testing.expectEqual(count, after);
 }
 
+test "a truncated PDF fails its look with its path and why" {
+    if (comptime !pardes.pdf_enabled) return;
+    const p = try withFile(testing.allocator, "x\n");
+    defer p.deinit();
+    var tmp = testing.tmpDir(.{});
+    defer tmp.cleanup();
+    const bytes = try @import("mupdf").makeLinksTestPdf(testing.allocator);
+    defer testing.allocator.free(bytes);
+    try tmp.dir.writeFile(testing.io, .{ .sub_path = "cut.pdf", .data = bytes[0..40] });
+    var dir_buf: [4096]u8 = undefined;
+    const dir = dir_buf[0..try tmp.dir.realPath(testing.io, &dir_buf)];
+    var line: [4200]u8 = undefined;
+    const r = wr(p, root_look, try std.fmt.bufPrint(&line, "{s}/cut.pdf\n", .{dir}));
+    try testing.expectEqual(Status.err, r.reply.status);
+    try testing.expect(std.mem.indexOf(u8, r.reply.ename, "cut.pdf: not a PDF pardes can read: ") != null);
+}
+
 test "a PDF's body reads its page's text layer, and takes no write" {
     if (comptime !pardes.pdf_enabled) return;
     const p = try withFile(testing.allocator, "x\n");