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LibJS: Add JSON.parse
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commit
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6 changed files with 218 additions and 5 deletions
15
Libraries/LibJS/Tests/JSON.parse-reviver.js
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15
Libraries/LibJS/Tests/JSON.parse-reviver.js
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@ -0,0 +1,15 @@
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load("test-common.js");
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try {
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let string = `{"var1":10,"var2":"hello","var3":{"nested":5}}`;
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let object = JSON.parse(string, (key, value) => typeof value === "number" ? value * 2 : value);
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assertDeepEquals(object, { var1: 20, var2: "hello", var3: { nested: 10 } });
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object = JSON.parse(string, (key, value) => typeof value === "number" ? undefined : value);
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assertDeepEquals(object, { var2: "hello", var3: {} });
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console.log("PASS");
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} catch (e) {
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console.log("FAIL: " + e);
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}
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43
Libraries/LibJS/Tests/JSON.parse.js
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43
Libraries/LibJS/Tests/JSON.parse.js
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@ -0,0 +1,43 @@
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load("test-common.js");
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try {
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assert(JSON.parse.length === 2);
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const properties = [
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["5", 5],
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["null", null],
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["true", true],
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["false", false],
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['"test"', "test"],
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['[1,2,"foo"]', [1, 2, "foo"]],
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['{"foo":1,"bar":"baz"}', { foo: 1, bar: "baz" }],
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];
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properties.forEach(testCase => {
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assertDeepEquals(JSON.parse(testCase[0]), testCase[1]);
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});
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let syntaxErrors = [
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undefined,
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NaN,
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-NaN,
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Infinity,
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-Infinity,
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'{ "foo" }',
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'{ foo: "bar" }',
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"[1,2,3,]",
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"[1,2,3, ]",
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'{ "foo": "bar",}',
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'{ "foo": "bar", }',
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];
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syntaxErrors.forEach(error => assertThrowsError(() => {
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JSON.parse(error);
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}, {
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error: SyntaxError,
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}));
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console.log("PASS");
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} catch (e) {
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console.log("FAIL: " + e);
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}
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@ -92,3 +92,40 @@ const assertVisitsAll = (testFunction, expectedOutput) => {
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function isClose(a, b) {
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return Math.abs(a - b) < 0.000001;
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}
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/**
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* Quick and dirty deep equals method.
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* @param {*} a First value
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* @param {*} b Second value
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*/
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function assertDeepEquals(a, b) {
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assert(deepEquals(a, b));
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}
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function deepEquals(a, b) {
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if (Array.isArray(a))
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return Array.isArray(b) && deepArrayEquals(a, b);
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if (typeof a === "object")
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return typeof b === "object" && deepObjectEquals(a, b);
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return a === b;
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}
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function deepArrayEquals(a, b) {
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if (a.length !== b.length)
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return false;
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for (let i = 0; i < a.length; ++i) {
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if (!deepEquals(a[i], b[i]))
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return false;
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}
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return true;
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}
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function deepObjectEquals(a, b) {
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if (a === null)
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return b === null;
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for (let key of Reflect.ownKeys(a)) {
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if (!deepEquals(a[key], b[key]))
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return false;
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}
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return true;
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}
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