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better supports_string_content cap detect

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This commit is contained in:
Xuan Son Nguyen
2026-08-15 13:06:26 +02:00
parent 27df9199d1
commit 37e7235645
2 changed files with 59 additions and 4 deletions
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tests/test-jinja.cpp
+49
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@@ -10,6 +10,7 @@
#include "jinja/parser.h"
#include "jinja/lexer.h"
#include "jinja/utils.h"
#include "jinja/caps.h"
#include "testing.h"
@@ -33,6 +34,7 @@ static void test_array_methods(testing & t);
static void test_object_methods(testing & t);
static void test_hasher(testing & t);
static void test_stats(testing & t);
static void test_caps(testing & t);
static void test_string_parts(testing & t);
static void test_fuzzing(testing & t);
@@ -73,6 +75,7 @@ int main(int argc, char *argv[]) {
if (!g_python_mode) {
t.test("hasher", test_hasher);
t.test("stats", test_stats);
t.test("caps", test_caps);
t.test("string parts", test_string_parts);
t.test("fuzzing", test_fuzzing);
}
@@ -2059,6 +2062,52 @@ static void test_stats(testing & t) {
});
}
static void test_caps(testing & t) {
static auto get_caps = [](const std::string & tmpl) -> jinja::caps {
jinja::lexer lexer;
auto lexer_res = lexer.tokenize(tmpl);
jinja::program prog = jinja::parse_from_tokens(lexer_res);
return jinja::caps_get(prog);
};
t.test("string content", [](testing & t) {
auto caps = get_caps(
"{% for message in messages %}"
"{{ message['role'] + ': ' + message['content'] }}"
"{% endfor %}"
);
t.assert_true("supports string content", caps.supports_string_content);
t.assert_true("does not support typed content", !caps.supports_typed_content);
});
t.test("typed content, raises on string", [](testing & t) {
// rendering with string content throws: 'selectattr' is not a String filter
auto caps = get_caps(
"{% for message in messages %}"
"{% for content in message['content'] | selectattr('type', 'equalto', 'text') %}"
"{{ content['text'] }}"
"{% endfor %}"
"{% endfor %}"
);
t.assert_true("does not support string content", !caps.supports_string_content);
t.assert_true("supports typed content", caps.supports_typed_content);
});
t.test("typed content, silently drops string", [](testing & t) {
// rendering with string content does not throw, but content[0]['text'] yields
// undefined for a string, so the message is silently dropped (MiniMax-M1 shape)
auto caps = get_caps(
"{% for message in messages %}"
"{{ message['content'][0]['text'] }}"
"{% endfor %}"
);
t.assert_true("does not support string content", !caps.supports_string_content);
t.assert_true("supports typed content", caps.supports_typed_content);
});
}
static void test_string_parts(testing & t) {
static auto render = [](const std::string & tmpl, const json & vars) -> jinja::string {
jinja::lexer lexer;