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Merge branch 'json-view/11-view-access' into json-view/12-view-values

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Signed-off-by: Niels Lohmann <mail@nlohmann.me>
This commit is contained in:
Niels Lohmann
2026-09-29 22:42:18 +02:00
parent 2aedf52d54 958fbc3702
commit fdcba786d8
8 changed files with 66 additions and 21 deletions
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21
tests/src/unit-json_view.cpp
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@@ -38,6 +38,7 @@ using nlohmann::ordered_json_view;
namespace
{
#if !defined(JSON_NOEXCEPTION)
// the exception parse() throws for a text, or "" if it accepts it
std::string parse_exception(const std::string& text, bool comments = false, bool trailing_commas = false)
{
@@ -66,6 +67,7 @@ std::string view_exception(const std::string& text, bool comments = false, bool
}
return "";
}
#endif
// a small deterministic generator of documents
struct generator
@@ -155,7 +157,7 @@ TEST_CASE("json_view")
CHECK(v.materialize() == j);
}
const json_view invalid;
const json_view invalid{};
CHECK(invalid.is_discarded());
CHECK(!static_cast<bool>(invalid));
CHECK(invalid.type() == json::value_t::discarded);
@@ -200,9 +202,11 @@ TEST_CASE("json_view")
})
{
CAPTURE(text);
#if !defined(JSON_NOEXCEPTION)
const std::string expected = parse_exception(text);
REQUIRE(!expected.empty());
CHECK(view_exception(text) == expected);
#endif
CHECK(!json_document::accept(text));
const json_document d = json_document::parse(text, false);
CHECK(d.is_discarded());
@@ -210,8 +214,9 @@ TEST_CASE("json_view")
CHECK(d.node_count() == 0);
}
// the exception types
CHECK_THROWS_AS(json_document::parse("[1,"), json::parse_error&);
CHECK_THROWS_AS(json_document::parse("1e400"), json::out_of_range&);
json_document _;
CHECK_THROWS_AS(_ = json_document::parse("[1,"), json::parse_error&);
CHECK_THROWS_AS(_ = json_document::parse("1e400"), json::out_of_range&);
}
SECTION("parse options")
@@ -226,7 +231,9 @@ TEST_CASE("json_view")
const bool comments = (options & 1) != 0;
const bool trailing_commas = (options & 2) != 0;
CHECK(json_document::accept(text, comments, trailing_commas) == json::accept(text, comments, trailing_commas));
#if !defined(JSON_NOEXCEPTION)
CHECK(view_exception(text, comments, trailing_commas) == parse_exception(text, comments, trailing_commas));
#endif
}
}
}
@@ -238,7 +245,9 @@ TEST_CASE("json_view")
const std::string nul_in_comment("[1, // c\0\n2]", 12);
CHECK(json_document::accept(nul_in_comment, true) == json::accept(nul_in_comment, true));
CHECK(json_document::parse("\xEF\xBB\xBF[1]").root().materialize() == json::parse("\xEF\xBB\xBF[1]"));
#if !defined(JSON_NOEXCEPTION)
CHECK(view_exception("\xEF\xBB") == parse_exception("\xEF\xBB"));
#endif
}
SECTION("inputs")
@@ -384,6 +393,7 @@ TEST_CASE("json_view")
namespace
{
#if !defined(JSON_NOEXCEPTION)
// the exception a call throws, or "" if it throws none
template<typename F>
std::string exception_of(F f)
@@ -398,6 +408,7 @@ std::string exception_of(F f)
}
return "";
}
#endif
// compares a view with the ordered_json value materialize() gives for it:
// types, sizes, elements and members (by index, key, and iteration), in
@@ -566,6 +577,7 @@ TEST_CASE("json_view element access and iteration")
const json_document d = json_document::parse(text);
const json_view v = d.root();
const json j = v.materialize();
#if !defined(JSON_NOEXCEPTION)
if (!j.is_object())
{
CHECK(exception_of([&] { static_cast<void>(v["a"]); }) == exception_of([&] { static_cast<void>(j["a"]); }));
@@ -587,6 +599,7 @@ TEST_CASE("json_view element access and iteration")
CHECK(exception_of([&] { static_cast<void>(v.front()); }) == exception_of([&] { static_cast<void>(j.front()); }));
CHECK(exception_of([&] { static_cast<void>(v.back()); }) == exception_of([&] { static_cast<void>(j.back()); }));
}
#endif
CHECK(v.contains("a") == j.contains("a"));
CHECK(v.count("a") == j.count("a"));
CHECK((v.find("a") == v.end()) == (j.find("a") == j.end())); // NOLINT(readability-container-contains): find() is what is tested
@@ -598,7 +611,7 @@ TEST_CASE("json_view element access and iteration")
CHECK(!d.root()["a"][0]);
CHECK_THROWS_WITH_AS(d.root()["a"].front(), "[json.exception.invalid_iterator.214] cannot get value", json::invalid_iterator&);
CHECK_THROWS_WITH_AS(d.root()["a"].back(), "[json.exception.invalid_iterator.214] cannot get value", json::invalid_iterator&);
const json_view invalid;
const json_view invalid{};
CHECK(invalid.begin() == invalid.end());
CHECK(std::string(invalid.type_name()) == "discarded");
CHECK_THROWS_WITH_AS(invalid["a"], "[json.exception.type_error.305] cannot use operator[] with a string argument with discarded", json::type_error&);