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jsonc_test.ts
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jsonc_test.ts
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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import * as JSONC from "./jsonc.ts";
import {
assertEquals,
assertStrictEquals,
assertThrows,
} from "../testing/asserts.ts";
// The test code for the jsonc module can also be found in the testcode directory.
function assertValidParse(
text: string,
expected: unknown,
options?: JSONC.ParseOptions,
) {
assertEquals(JSONC.parse(text, options), expected);
}
function assertInvalidParse(
text: string,
// deno-lint-ignore no-explicit-any
ErrorClass?: (new (...args: any[]) => Error),
msgIncludes?: string,
options?: JSONC.ParseOptions,
) {
assertThrows(
() => JSONC.parse(text, options),
ErrorClass,
msgIncludes,
);
}
Deno.test({
name: "[jsonc] parse with single line comment",
fn() {
assertValidParse(`"aaa"//comment`, "aaa");
assertValidParse(`["aaa"//comment\n,"aaa"]`, ["aaa", "aaa"]);
assertValidParse(`["aaa"//comment\r,"aaa"]`, ["aaa", "aaa"]);
assertValidParse(`["aaa"//comment\n\r,"aaa"]`, ["aaa", "aaa"]);
},
});
Deno.test({
name: "[jsonc] parse with multi line comments",
fn() {
assertValidParse(`"aaa"/*comment*/`, "aaa");
assertValidParse(`100/*comment*/`, 100);
assertValidParse(`"aaa/*comment*/"`, "aaa/*comment*/");
assertValidParse(`"aaa"/*comment\ncomment*/`, "aaa");
assertInvalidParse(`"aaa"/*`, SyntaxError);
assertInvalidParse(`"aaa"/*/`, SyntaxError);
},
});
Deno.test({
name: "[jsonc] parse special character",
fn() {
assertValidParse(`"👪"`, "👪");
assertValidParse(`"🦕"`, "🦕");
assertValidParse(
`"\u543e\u8f29\u306f\u732b\u3067\u3042\u308b\u3002"`,
"\u543e\u8f29\u306f\u732b\u3067\u3042\u308b\u3002",
);
assertValidParse(
`"\\" \\\\ \\/ \\b \\f \\n \\r \\t"`,
'" \\ \/ \b \f \n \r \t',
);
},
});
Deno.test({
name: "[jsonc] JSONCParser.#numberEndToken",
fn() {
// Correctly parses the letters after the numbers (` \t\r\n[]{}:,/`)
assertValidParse(`{"a":0}`, { a: 0 });
assertValidParse(`[0]`, [0]);
assertValidParse(`[0,]`, [0]);
assertValidParse(`0//`, 0);
assertValidParse(`0\r`, 0);
assertValidParse(`0\n`, 0);
assertValidParse(`0\t`, 0);
assertValidParse(`0 `, 0);
assertInvalidParse(`{"a":0{}`, SyntaxError);
assertInvalidParse(`{"a":0[}`, SyntaxError);
assertInvalidParse(`{"a":0:}`, SyntaxError);
},
});
Deno.test({
name: "[jsonc] error message",
fn() {
assertInvalidParse(
`:::::`,
SyntaxError,
"Unexpected token : in JSONC at position 0",
);
assertInvalidParse(
`[`,
SyntaxError,
"Unexpected end of JSONC input",
);
assertInvalidParse(
`[]100`,
SyntaxError,
"Unexpected token 100 in JSONC at position 2",
);
assertInvalidParse(
`[aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa]`,
SyntaxError,
"Unexpected token aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa... in JSONC at position 1",
);
},
});
Deno.test({
name: "[jsonc] __proto__",
fn() {
// The result of JSON.parse and the result of JSONC.parse should match
const json = JSON.parse('{"__proto__": 100}');
const jsonc = JSONC.parse('{"__proto__": 100}');
assertEquals(jsonc, json);
assertEquals((jsonc as Record<string, string>).__proto__, 100);
assertEquals((jsonc as Record<string, string>).__proto__, json.__proto__);
assertStrictEquals(Object.getPrototypeOf(jsonc), Object.prototype);
assertStrictEquals(
Object.getPrototypeOf(jsonc),
Object.getPrototypeOf(json),
);
},
});
Deno.test({
name: "[jsonc] duplicate object key",
fn() {
// The result of JSON.parse and the result of JSONC.parse should match
const json = JSON.parse('{"aaa": 0, "aaa": 1}');
const jsonc = JSONC.parse('{"aaa": 0, "aaa": 1}');
assertEquals(jsonc, { aaa: 1 });
assertEquals(jsonc, json);
},
});
Deno.test({
name: "[jsonc] parse other than strings",
fn() {
assertInvalidParse(
// deno-lint-ignore no-explicit-any
undefined as any,
SyntaxError,
"Unexpected token undefined in JSONC at position 0",
);
// deno-lint-ignore no-explicit-any
assertValidParse(0 as any, 0);
},
});
Deno.test({
name: "[jsonc] parse consecutive backslash",
fn() {
assertValidParse('"foo\\\\"', "foo\\");
assertValidParse(' ["foo\\"", "bar"]', ['foo"', "bar"]);
assertInvalidParse('["foo\\\\"", "bar"]', SyntaxError);
assertValidParse(' ["foo\\\\\\"", "bar"]', ['foo\\"', "bar"]);
assertInvalidParse('["foo\\\\\\\\"", "bar"]', SyntaxError);
assertInvalidParse('["foo\\", "bar"]', SyntaxError);
assertValidParse(' ["foo\\\\", "bar"]', ["foo\\", "bar"]);
assertInvalidParse('["foo\\\\\\", "bar"]', SyntaxError);
assertValidParse(' ["foo\\\\\\\\", "bar"]', ["foo\\\\", "bar"]);
},
});