milestone 18: collapse duplicated infrastructure into shared listener core, crud list helper, resource shells, transport race, name and line helpers, ui modules

tests/fuzz/corpus.zig

@@ -14,6 +14,9 @@
 
 const std = @import("std");
 const dns = @import("dns");
+const smith_encode = @import("smith_encode.zig");
+
+const sliceInput = smith_encode.sliceInput;
 
 /// A query for example.com A with an EDNS(0) OPT record advertising 4096
 /// bytes: id 0x1234, RD set, one question, one additional.
@@ -119,18 +122,6 @@ const max_jumps = dns.types.max_compression_jumps;
 pub const chain_at_cap = pointerChain(max_jumps);
 pub const chain_past_cap = pointerChain(max_jumps + 1);
 
-/// Encodes `bytes` as a single `Smith.slice` value.
-fn sliceInput(comptime bytes: []const u8) *const [4 + bytes.len]u8 {
-    return &struct {
-        const value: [4 + bytes.len]u8 = blk: {
-            var buf: [4 + bytes.len]u8 = undefined;
-            std.mem.writeInt(u32, buf[0..4], @intCast(bytes.len), .little);
-            buf[4..].* = bytes[0..bytes.len].*;
-            break :blk buf;
-        };
-    }.value;
-}
-
 /// Encodes `bytes` as a `Smith.slice` value followed by one integer, which the
 /// name target reads as an offset and the TTL target as an elapsed time.
 fn sliceIntInput(comptime bytes: []const u8, comptime int: u64) *const [12 + bytes.len]u8 {
@@ -181,8 +172,12 @@ test "the pointer chain has the documented shape" {
     try std.testing.expectEqual(@as(u16, 0xc000), std.mem.readInt(u16, chain_at_cap[3..5], .big));
 }
 
-test "a slice input carries its own length" {
-    const encoded = sliceInput(query);
+test "a slice-plus-integer input carries the length, the bytes and the integer" {
+    const encoded = sliceIntInput(query, 29);
     try std.testing.expectEqual(@as(u32, query.len), std.mem.readInt(u32, encoded[0..4], .little));
-    try std.testing.expectEqualSlices(u8, query, encoded[4..]);
+    try std.testing.expectEqualSlices(u8, query, encoded[4 .. 4 + query.len]);
+    try std.testing.expectEqual(
+        @as(u64, 29),
+        std.mem.readInt(u64, encoded[4 + query.len ..][0..8], .little),
+    );
 }