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test: expand property-based tests for H1 parser and H2 HEADERS
H1 had a single property (chunk CRLF count). Add 7 more: chunk size hex correctness, request encoding roundtrip, valid header encoding, invalid header rejection, target validation, EOF terminator, and body inclusion. H2 tested every frame type except HEADERS. Add 5 properties covering no-padding/no-priority, priority-only, padding-only, both combined, and END_STREAM flag. These immediately caught the inverted priority check fixed in the previous commit. 30 total properties now pass across all 4 prop modules.
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2 files changed

Lines changed: 264 additions & 4 deletions

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‎test/prop_gen_http_parser_h1.erl‎

Lines changed: 170 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -3,19 +3,185 @@
33
-include_lib("proper/include/proper.hrl").
44
-include_lib("stdlib/include/assert.hrl").
55

6+
%% -------------------------------------------------------------------
7+
%% Chunked encoding: every chunk has at least 2 CRLFs
8+
%% -------------------------------------------------------------------
9+
610
prop_encoded_chunk_always_contains_at_least_two_crlfs() ->
711
?FORALL(Chunk, iodata(), begin
812
Encoded = gen_http_parser_h1:encode_chunk(Chunk),
9-
%% Flatten iolist to binary to count CRLFs
1013
Binary = iolist_to_binary(Encoded),
11-
%% Count occurrences of "\r\n"
1214
CrlfCount = count_crlf(Binary),
13-
%% HTTP chunked encoding always has at least 2 CRLFs:
14-
%% one after the size, one after the chunk data
1515
?assert(CrlfCount >= 2),
1616
true
1717
end).
1818

19+
%% -------------------------------------------------------------------
20+
%% Chunk size prefix matches actual data length
21+
%% -------------------------------------------------------------------
22+
23+
prop_chunk_size_matches_data_length() ->
24+
?FORALL(
25+
Data,
26+
binary(),
27+
begin
28+
Encoded = iolist_to_binary(gen_http_parser_h1:encode_chunk(Data)),
29+
%% Format: "<hex-size>\r\n<data>\r\n"
30+
[SizeHex | _] = binary:split(Encoded, <<"\r\n">>),
31+
ParsedSize = binary_to_integer(SizeHex, 16),
32+
?assertEqual(byte_size(Data), ParsedSize),
33+
true
34+
end
35+
).
36+
37+
%% -------------------------------------------------------------------
38+
%% Request encoding roundtrip: encode then parse back
39+
%% -------------------------------------------------------------------
40+
41+
prop_encode_request_parses_back() ->
42+
?FORALL(
43+
{Method, Path, Headers},
44+
{http_method(), http_path(), list(http_header())},
45+
begin
46+
{ok, IoData} = gen_http_parser_h1:encode_request(Method, Path, Headers, undefined),
47+
Bin = iolist_to_binary(IoData),
48+
%% Parse status line (we encoded a request, but let's at least
49+
%% verify the wire format contains the method and path)
50+
?assert(binary:match(Bin, [Method]) =/= nomatch),
51+
?assert(binary:match(Bin, [Path]) =/= nomatch),
52+
?assert(binary:match(Bin, [<<"HTTP/1.1">>]) =/= nomatch),
53+
%% Each header name should appear in the output
54+
lists:all(
55+
fun({Name, _Value}) ->
56+
binary:match(Bin, [Name]) =/= nomatch
57+
end,
58+
Headers
59+
)
60+
end
61+
).
62+
63+
%% -------------------------------------------------------------------
64+
%% Valid header names survive encoding
65+
%% -------------------------------------------------------------------
66+
67+
prop_valid_headers_encode_ok() ->
68+
?FORALL(
69+
Headers,
70+
non_empty(list(http_header())),
71+
begin
72+
case gen_http_parser_h1:encode_request(<<"GET">>, <<"/">>, Headers, undefined) of
73+
{ok, _IoData} -> true;
74+
{error, _} -> false
75+
end
76+
end
77+
).
78+
79+
%% -------------------------------------------------------------------
80+
%% Invalid header names are rejected
81+
%% -------------------------------------------------------------------
82+
83+
prop_invalid_header_names_rejected() ->
84+
?FORALL(
85+
BadName,
86+
bad_header_name(),
87+
begin
88+
case gen_http_parser_h1:encode_request(<<"GET">>, <<"/">>, [{BadName, <<"v">>}], undefined) of
89+
{error, {invalid_header_name, _}} -> true;
90+
{ok, _} -> false
91+
end
92+
end
93+
).
94+
95+
%% -------------------------------------------------------------------
96+
%% Valid targets survive encoding
97+
%% -------------------------------------------------------------------
98+
99+
prop_valid_targets_encode_ok() ->
100+
?FORALL(
101+
Target,
102+
http_path(),
103+
begin
104+
case gen_http_parser_h1:encode_request(<<"GET">>, Target, [], undefined) of
105+
{ok, _} -> true;
106+
{error, _} -> false
107+
end
108+
end
109+
).
110+
111+
%% -------------------------------------------------------------------
112+
%% Chunk EOF produces the terminator
113+
%% -------------------------------------------------------------------
114+
115+
prop_eof_chunk_is_terminator() ->
116+
Encoded = iolist_to_binary(gen_http_parser_h1:encode_chunk(eof)),
117+
?assertEqual(<<"0\r\n\r\n">>, Encoded),
118+
true.
119+
120+
%% -------------------------------------------------------------------
121+
%% Encode request with body includes body bytes
122+
%% -------------------------------------------------------------------
123+
124+
prop_encode_request_with_body() ->
125+
?FORALL(
126+
Body,
127+
non_empty(binary()),
128+
begin
129+
{ok, IoData} = gen_http_parser_h1:encode_request(<<"POST">>, <<"/">>, [], Body),
130+
Bin = iolist_to_binary(IoData),
131+
%% Body should appear after the header block
132+
binary:match(Bin, [Body]) =/= nomatch
133+
end
134+
).
135+
136+
%% -------------------------------------------------------------------
137+
%% Generators
138+
%% -------------------------------------------------------------------
139+
140+
http_method() ->
141+
oneof([<<"GET">>, <<"POST">>, <<"PUT">>, <<"DELETE">>, <<"PATCH">>, <<"HEAD">>, <<"OPTIONS">>]).
142+
143+
http_path() ->
144+
?LET(
145+
Segments,
146+
list(path_segment()),
147+
iolist_to_binary([<<"/">> | lists:join(<<"/">>, Segments)])
148+
).
149+
150+
path_segment() ->
151+
?LET(
152+
Chars,
153+
non_empty(list(oneof(lists:seq($a, $z) ++ lists:seq($0, $9) ++ [$-, $_, $.]))),
154+
list_to_binary(Chars)
155+
).
156+
157+
http_header() ->
158+
{header_name(), header_value()}.
159+
160+
header_name() ->
161+
?LET(
162+
Chars,
163+
non_empty(list(oneof(lists:seq($a, $z) ++ lists:seq($0, $9) ++ [$-, $_]))),
164+
list_to_binary(Chars)
165+
).
166+
167+
header_value() ->
168+
?LET(
169+
Chars,
170+
list(oneof(lists:seq(33, 126) ++ [$\s, $\t])),
171+
list_to_binary(Chars)
172+
).
173+
174+
bad_header_name() ->
175+
?LET(
176+
{Prefix, Suffix},
177+
{non_empty(list(oneof(lists:seq($a, $z)))), oneof([<<" ">>, <<"\t">>, <<"\r">>, <<"\n">>])},
178+
<<(list_to_binary(Prefix))/binary, Suffix/binary>>
179+
).
180+
181+
%% -------------------------------------------------------------------
182+
%% Helpers
183+
%% -------------------------------------------------------------------
184+
19185
-spec count_crlf(binary()) -> non_neg_integer().
20186
count_crlf(Binary) ->
21187
count_crlf(Binary, 0).

‎test/prop_gen_http_parser_h2.erl‎

Lines changed: 94 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -177,6 +177,100 @@ prop_window_update_frame() ->
177177
true
178178
end).
179179

180+
%% -------------------------------------------------------------------
181+
%% HEADERS Packet (the missing frame type from the original suite)
182+
%% -------------------------------------------------------------------
183+
184+
prop_headers_frame_no_padding_no_priority() ->
185+
?FORALL(
186+
{StreamId, Hbf},
187+
{non_zero_stream_id(), binary()},
188+
begin
189+
?assertRoundTrip(#h2_headers{
190+
stream_id = StreamId,
191+
flags = 16#00,
192+
hbf = Hbf,
193+
is_exclusive = undefined,
194+
stream_dependency = undefined,
195+
weight = undefined,
196+
padding = undefined
197+
}),
198+
true
199+
end
200+
).
201+
202+
prop_headers_frame_with_priority() ->
203+
?FORALL(
204+
{StreamId, Hbf, StreamDep, Exclusive, Weight},
205+
{non_zero_stream_id(), binary(), non_zero_stream_id(), boolean(), integer(1, 256)},
206+
begin
207+
?assertRoundTrip(#h2_headers{
208+
stream_id = StreamId,
209+
flags = 16#20,
210+
hbf = Hbf,
211+
is_exclusive = Exclusive,
212+
stream_dependency = StreamDep,
213+
weight = Weight,
214+
padding = undefined
215+
}),
216+
true
217+
end
218+
).
219+
220+
prop_headers_frame_with_padding() ->
221+
?FORALL(
222+
{StreamId, Hbf, Padding},
223+
{non_zero_stream_id(), binary(), binary()},
224+
begin
225+
?assertRoundTrip(#h2_headers{
226+
stream_id = StreamId,
227+
flags = 16#08,
228+
hbf = Hbf,
229+
is_exclusive = undefined,
230+
stream_dependency = undefined,
231+
weight = undefined,
232+
padding = Padding
233+
}),
234+
true
235+
end
236+
).
237+
238+
prop_headers_frame_with_priority_and_padding() ->
239+
?FORALL(
240+
{StreamId, Hbf, StreamDep, Exclusive, Weight, Padding},
241+
{non_zero_stream_id(), binary(), non_zero_stream_id(), boolean(), integer(1, 256), binary()},
242+
begin
243+
?assertRoundTrip(#h2_headers{
244+
stream_id = StreamId,
245+
flags = 16#28,
246+
hbf = Hbf,
247+
is_exclusive = Exclusive,
248+
stream_dependency = StreamDep,
249+
weight = Weight,
250+
padding = Padding
251+
}),
252+
true
253+
end
254+
).
255+
256+
prop_headers_frame_end_stream() ->
257+
?FORALL(
258+
{StreamId, Hbf},
259+
{non_zero_stream_id(), binary()},
260+
begin
261+
?assertRoundTrip(#h2_headers{
262+
stream_id = StreamId,
263+
flags = 16#01,
264+
hbf = Hbf,
265+
is_exclusive = undefined,
266+
stream_dependency = undefined,
267+
weight = undefined,
268+
padding = undefined
269+
}),
270+
true
271+
end
272+
).
273+
180274
%% -------------------------------------------------------------------
181275
%% CONTINUATION Packet
182276
%% -------------------------------------------------------------------

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