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✨ add contains function for JSON pointers

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This commit is contained in:
Niels Lohmann
2019-06-30 10:03:08 +02:00
parent 39011a1759
commit 258fa798f1
7 changed files with 338 additions and 23 deletions
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51
test/src/unit-json_pointer.cpp
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@ -90,12 +90,18 @@ TEST_CASE("JSON pointers")
// the whole document
CHECK(j[json::json_pointer()] == j);
CHECK(j[json::json_pointer("")] == j);
CHECK(j.contains(json::json_pointer()));
CHECK(j.contains(json::json_pointer("")));
// array access
CHECK(j[json::json_pointer("/foo")] == j["foo"]);
CHECK(j.contains(json::json_pointer("/foo")));
CHECK(j[json::json_pointer("/foo/0")] == j["foo"][0]);
CHECK(j[json::json_pointer("/foo/1")] == j["foo"][1]);
CHECK(j["/foo/1"_json_pointer] == j["foo"][1]);
CHECK(j.contains(json::json_pointer("/foo/0")));
CHECK(j.contains(json::json_pointer("/foo/1")));
CHECK(not j.contains(json::json_pointer("/foo/-")));
// checked array access
CHECK(j.at(json::json_pointer("/foo/0")) == j["foo"][0]);
@ -103,6 +109,8 @@ TEST_CASE("JSON pointers")
// empty string access
CHECK(j[json::json_pointer("/")] == j[""]);
CHECK(j.contains(json::json_pointer("")));
CHECK(j.contains(json::json_pointer("/")));
// other cases
CHECK(j[json::json_pointer("/ ")] == j[" "]);
@ -112,6 +120,14 @@ TEST_CASE("JSON pointers")
CHECK(j[json::json_pointer("/i\\j")] == j["i\\j"]);
CHECK(j[json::json_pointer("/k\"l")] == j["k\"l"]);
// contains
CHECK(j.contains(json::json_pointer("/ ")));
CHECK(j.contains(json::json_pointer("/c%d")));
CHECK(j.contains(json::json_pointer("/e^f")));
CHECK(j.contains(json::json_pointer("/g|h")));
CHECK(j.contains(json::json_pointer("/i\\j")));
CHECK(j.contains(json::json_pointer("/k\"l")));
// checked access
CHECK(j.at(json::json_pointer("/ ")) == j[" "]);
CHECK(j.at(json::json_pointer("/c%d")) == j["c%d"]);
@ -123,14 +139,24 @@ TEST_CASE("JSON pointers")
// escaped access
CHECK(j[json::json_pointer("/a~1b")] == j["a/b"]);
CHECK(j[json::json_pointer("/m~0n")] == j["m~n"]);
CHECK(j.contains(json::json_pointer("/a~1b")));
CHECK(j.contains(json::json_pointer("/m~0n")));
// unescaped access
// access to nonexisting values yield object creation
CHECK(not j.contains(json::json_pointer("/a/b")));
CHECK_NOTHROW(j[json::json_pointer("/a/b")] = 42);
CHECK(j.contains(json::json_pointer("/a/b")));
CHECK(j["a"]["b"] == json(42));
CHECK(not j.contains(json::json_pointer("/a/c/1")));
CHECK_NOTHROW(j[json::json_pointer("/a/c/1")] = 42);
CHECK(j["a"]["c"] == json({nullptr, 42}));
CHECK(j.contains(json::json_pointer("/a/c/1")));
CHECK(not j.contains(json::json_pointer("/a/d/-")));
CHECK_NOTHROW(j[json::json_pointer("/a/d/-")] = 42);
CHECK(not j.contains(json::json_pointer("/a/d/-")));
CHECK(j["a"]["d"] == json::array({42}));
// "/a/b" works for JSON {"a": {"b": 42}}
CHECK(json({{"a", {{"b", 42}}}})[json::json_pointer("/a/b")] == json(42));
@ -143,6 +169,7 @@ TEST_CASE("JSON pointers")
CHECK_THROWS_AS(j_primitive.at("/foo"_json_pointer), json::out_of_range&);
CHECK_THROWS_WITH(j_primitive.at("/foo"_json_pointer),
"[json.exception.out_of_range.404] unresolved reference token 'foo'");
CHECK(not j_primitive.contains(json::json_pointer("/foo")));
}
SECTION("const access")
@ -233,11 +260,16 @@ TEST_CASE("JSON pointers")
// the whole document
CHECK(j[""_json_pointer] == j);
CHECK(j.contains(""_json_pointer));
// array access
CHECK(j["/foo"_json_pointer] == j["foo"]);
CHECK(j["/foo/0"_json_pointer] == j["foo"][0]);
CHECK(j["/foo/1"_json_pointer] == j["foo"][1]);
CHECK(j.contains("/foo"_json_pointer));
CHECK(j.contains("/foo/0"_json_pointer));
CHECK(j.contains("/foo/1"_json_pointer));
CHECK(not j.contains("/foo/-"_json_pointer));
}
}
@ -278,6 +310,12 @@ TEST_CASE("JSON pointers")
CHECK_THROWS_AS(j_const.at("/01"_json_pointer), json::parse_error&);
CHECK_THROWS_WITH(j_const.at("/01"_json_pointer),
"[json.exception.parse_error.106] parse error: array index '01' must not begin with '0'");
CHECK_THROWS_AS(j.contains("/01"_json_pointer), json::parse_error&);
CHECK_THROWS_WITH(j.contains("/01"_json_pointer),
"[json.exception.parse_error.106] parse error: array index '01' must not begin with '0'");
CHECK_THROWS_AS(j_const.contains("/01"_json_pointer), json::parse_error&);
CHECK_THROWS_WITH(j_const.contains("/01"_json_pointer),
"[json.exception.parse_error.106] parse error: array index '01' must not begin with '0'");
// error with incorrect numbers
CHECK_THROWS_AS(j["/one"_json_pointer] = 1, json::parse_error&);
@ -294,6 +332,13 @@ TEST_CASE("JSON pointers")
CHECK_THROWS_WITH(j_const.at("/one"_json_pointer) == 1,
"[json.exception.parse_error.109] parse error: array index 'one' is not a number");
CHECK_THROWS_AS(j.contains("/one"_json_pointer), json::parse_error&);
CHECK_THROWS_WITH(j.contains("/one"_json_pointer),
"[json.exception.parse_error.109] parse error: array index 'one' is not a number");
CHECK_THROWS_AS(j_const.contains("/one"_json_pointer), json::parse_error&);
CHECK_THROWS_WITH(j_const.contains("/one"_json_pointer),
"[json.exception.parse_error.109] parse error: array index 'one' is not a number");
CHECK_THROWS_AS(json({{"/list/0", 1}, {"/list/1", 2}, {"/list/three", 3}}).unflatten(), json::parse_error&);
CHECK_THROWS_WITH(json({{"/list/0", 1}, {"/list/1", 2}, {"/list/three", 3}}).unflatten(),
"[json.exception.parse_error.109] parse error: array index 'three' is not a number");
@ -306,6 +351,7 @@ TEST_CASE("JSON pointers")
CHECK_THROWS_AS(j_const["/-"_json_pointer], json::out_of_range&);
CHECK_THROWS_WITH(j_const["/-"_json_pointer],
"[json.exception.out_of_range.402] array index '-' (3) is out of range");
CHECK(not j_const.contains("/-"_json_pointer));
// error when using "-" with at
CHECK_THROWS_AS(j.at("/-"_json_pointer), json::out_of_range&);
@ -314,6 +360,7 @@ TEST_CASE("JSON pointers")
CHECK_THROWS_AS(j_const.at("/-"_json_pointer), json::out_of_range&);
CHECK_THROWS_WITH(j_const.at("/-"_json_pointer),
"[json.exception.out_of_range.402] array index '-' (3) is out of range");
CHECK(not j_const.contains("/-"_json_pointer));
}
SECTION("const access")
@ -329,11 +376,13 @@ TEST_CASE("JSON pointers")
CHECK_THROWS_AS(j.at("/3"_json_pointer), json::out_of_range&);
CHECK_THROWS_WITH(j.at("/3"_json_pointer),
"[json.exception.out_of_range.401] array index 3 is out of range");
CHECK(not j.contains("/3"_json_pointer));
// assign to nonexisting index (with gap)
CHECK_THROWS_AS(j.at("/5"_json_pointer), json::out_of_range&);
CHECK_THROWS_WITH(j.at("/5"_json_pointer),
"[json.exception.out_of_range.401] array index 5 is out of range");
CHECK(not j.contains("/5"_json_pointer));
// assign to "-"
CHECK_THROWS_AS(j["/-"_json_pointer], json::out_of_range&);
@ -342,8 +391,8 @@ TEST_CASE("JSON pointers")
CHECK_THROWS_AS(j.at("/-"_json_pointer), json::out_of_range&);
CHECK_THROWS_WITH(j.at("/-"_json_pointer),
"[json.exception.out_of_range.402] array index '-' (3) is out of range");
CHECK(not j.contains("/-"_json_pointer));
}
}
SECTION("flatten")