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map.spec.ts
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293 lines (245 loc) · 8.42 KB
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import * as util from "../../util";
test("map constructor", () => {
util.testFunction`
let mymap = new Map();
return mymap.size;
`.expectToMatchJsResult();
});
test("map iterable constructor", () => {
util.testFunction`
let mymap = new Map([["a", "c"],["b", "d"]]);
return mymap.has("a") && mymap.has("b");
`.expectToMatchJsResult();
});
test("map iterable constructor map", () => {
util.testFunction`
let mymap = new Map(new Map([["a", "c"],["b", "d"]]));
return mymap.has("a") && mymap.has("b");
`.expectToMatchJsResult();
});
test("map clear", () => {
const mapTS = 'let mymap = new Map([["a", "c"],["b", "d"]]); mymap.clear();';
util.testExpression("mymap.size").setTsHeader(mapTS).expectToMatchJsResult();
util.testExpression('!mymap.has("a") && !mymap.has("b")').setTsHeader(mapTS).expectToMatchJsResult();
});
test("map delete", () => {
util.testFunction`
let mymap = new Map([["a", "c"],["b", "d"]]);
mymap.delete("a");
return mymap.has("b") && !mymap.has("a");
`.expectToMatchJsResult();
});
test("map entries", () => {
util.testFunction`
let mymap = new Map([[5, 2],[6, 3],[7, 4]]);
let count = 0;
for (const [key, value] of mymap.entries()) { count += key + value; }
return count;
`.expectToMatchJsResult();
});
test("map foreach", () => {
util.testFunction(
`let mymap = new Map([["a", 2],["b", 3],["c", 4]]);
let count = 0;
mymap.forEach(i => count += i);
return count;`
).expectToMatchJsResult();
});
test("map foreach keys", () => {
util.testFunction`
let mymap = new Map([[5, 2],[6, 3],[7, 4]]);
let count = 0;
mymap.forEach((value, key) => { count += key; });
return count;
`.expectToMatchJsResult();
});
test("map get", () => {
util.testFunction`
let mymap = new Map([["a", "c"],["b", "d"]]);
return mymap.get("a");
`.expectToMatchJsResult();
});
test("map get missing", () => {
util.testFunction`
let mymap = new Map([["a", "c"],["b", "d"]]);
return mymap.get("c");
`.expectToMatchJsResult();
});
test("map has", () => {
util.testFunction`
let mymap = new Map([["a", "c"]]);
return mymap.has("a");
`.expectToMatchJsResult();
});
test("map has false", () => {
util.testFunction`
let mymap = new Map();
return mymap.has("a");
`.expectToMatchJsResult();
});
test.each([
'[["a", null]]',
'[["b", "c"], ["a", null]]',
'[["a", null], ["b", "c"]]',
'[["b", "c"], ["a", null], ["x", "y"]]',
])("map (%p) has null", entries => {
util.testFunction`
let mymap = new Map(${entries});
return mymap.has("a");
`.expectToMatchJsResult();
});
test.each([
'[["a", undefined]]',
'[["b", "c"], ["a", undefined]]',
'[["a", undefined], ["b", "c"]]',
'[["b", "c"], ["a", undefined], ["x", "y"]]',
])("map (%p) has undefined", entries => {
util.testFunction`
let mymap = new Map(${entries});
return mymap.has("a");
`.expectToMatchJsResult();
});
test("map keys", () => {
util.testFunction`
let mymap = new Map([[5, 2],[6, 3],[7, 4]]);
let count = 0;
for (const key of mymap.keys()) { count += key; }
return count;
`.expectToMatchJsResult();
});
test("map set", () => {
const mapTS = 'let mymap = new Map(); mymap.set("a", 5);';
util.testFunction(mapTS + 'return mymap.has("a");').expectToMatchJsResult();
util.testFunction(mapTS + 'return mymap.get("a")').expectToMatchJsResult();
});
test("map values", () => {
util.testFunction`
let mymap = new Map([[5, 2],[6, 3],[7, 4]]);
let count = 0;
for (const value of mymap.values()) { count += value; }
return count;
`.expectToMatchJsResult();
});
test("map size", () => {
util.testFunction("let m = new Map(); return m.size;").expectToMatchJsResult();
util.testFunction("let m = new Map(); m.set(1,3); return m.size;").expectToMatchJsResult();
util.testFunction("let m = new Map([[1,2],[3,4]]); return m.size;").expectToMatchJsResult();
util.testFunction("let m = new Map([[1,2],[3,4]]); m.clear(); return m.size;").expectToMatchJsResult();
util.testFunction("let m = new Map([[1,2],[3,4]]); m.delete(3); return m.size;").expectToMatchJsResult();
});
const iterationMethods = ["entries", "keys", "values"];
describe.each(iterationMethods)("map.%s() preserves insertion order", iterationMethod => {
test("basic", () => {
util.testFunction`
const mymap = new Map();
mymap.set("x", 1);
mymap.set("a", 2);
mymap.set(4, 3);
mymap.set("b", 6);
mymap.set(1, 4);
mymap.set("a", 5);
mymap.delete("b");
return [...mymap.${iterationMethod}()];
`.expectToMatchJsResult();
});
test("after removing last", () => {
util.testFunction`
const mymap = new Map();
mymap.set("x", 1);
mymap.set("a", 2);
mymap.set(4, 3);
mymap.delete(4);
return [...mymap.${iterationMethod}()];
`.expectToMatchJsResult();
});
test("after removing first", () => {
util.testFunction`
const mymap = new Map();
mymap.set("x", 1);
mymap.set("a", 2);
mymap.set(4, 3);
mymap.delete("x");
return [...mymap.${iterationMethod}()];
`.expectToMatchJsResult();
});
test("after removing all", () => {
util.testFunction`
const mymap = new Map();
mymap.set("x", 1);
mymap.set("a", 2);
mymap.delete("a");
mymap.delete("x");
return [...mymap.${iterationMethod}()];
`.expectToMatchJsResult();
});
});
describe.each(iterationMethods)("map.%s() handles mutation", iterationMethod => {
test("iterator persists after delete", () => {
util.testFunction`
const map = new Map<number, string>([[1, "a"], [2, "b"]]);
const iter = map.${iterationMethod}();
map.delete(1);
return iter.next().value;
`.expectToMatchJsResult();
});
test("iterator with delete and add between iterations", () => {
util.testFunction`
const map = new Map<number, string>([[1, "a"], [2, "b"], [3, "c"]]);
const iter = map.${iterationMethod}();
iter.next(); // 1
map.delete(2);
map.set(4, "d");
const results: IteratorResult<any>[] = [];
let r = iter.next();
while (!r.done) { results.push({ done: r.done, value: r.value }); r = iter.next(); }
return results;
`.expectToMatchJsResult();
});
test("iterator does not restart after exhaustion", () => {
util.testFunction`
const map = new Map<number, string>([[1, "a"], [2, "b"]]);
const iter = map.${iterationMethod}();
const results: boolean[] = [];
results.push(iter.next().done!);
results.push(iter.next().done!);
results.push(iter.next().done!); // should be done
results.push(iter.next().done!); // should still be done, not restart
return results;
`.expectToMatchJsResult();
});
});
describe("Map.groupBy", () => {
test("empty", () => {
util.testFunction`
const array = [];
const map = Map.groupBy(array, (num, index) => {
return num % 2 === 0 ? "even": "odd";
});
return Object.fromEntries(map.entries());
`.expectToEqual([]);
});
test("groupBy", () => {
util.testFunction`
const array = [0, 1, 2, 3, 4, 5];
const map = Map.groupBy(array, (num, index) => {
return num % 2 === 0 ? "even": "odd";
});
return Object.fromEntries(map.entries());
`.expectToEqual({
even: [0, 2, 4],
odd: [1, 3, 5],
});
});
test("groupBy index", () => {
util.testFunction`
const array = [0, 1, 2, 3, 4, 5];
const map = Map.groupBy(array, (num, index) => {
return index < 3 ? "low": "high";
});
return Object.fromEntries(map.entries());
`.expectToEqual({
low: [0, 1, 2],
high: [3, 4, 5],
});
});
});