/
map-test.js
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/
map-test.js
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require("../env");
var vows = require("vows"),
assert = require("assert");
var suite = vows.describe("d3.map");
suite.addBatch({
"constructor": {
"map() returns an empty map": function() {
var map = d3.map();
assert.deepEqual(map.keys(), []);
},
"map(null) returns an empty map": function() {
var map = d3.map(null);
assert.deepEqual(map.keys(), []);
},
"map(object) copies enumerable keys": function() {
var map = d3.map({foo: 42});
assert.isTrue(map.has("foo"));
assert.equal(map.get("foo"), 42);
var map = d3.map(Object.create(null, {foo: {value: 42, enumerable: true}}));
assert.isTrue(map.has("foo"));
assert.equal(map.get("foo"), 42);
},
"map(object) copies inherited keys": function() {
function Foo() {}
Foo.prototype.foo = 42;
var map = d3.map(Object.create({foo: 42}));
assert.isTrue(map.has("foo"));
assert.equal(map.get("foo"), 42);
var map = d3.map(new Foo());
assert.isTrue(map.has("foo"));
assert.equal(map.get("foo"), 42);
},
"map(object) does not copy non-enumerable keys": function() {
var map = d3.map({__proto__: 42}); // because __proto__ isn't enumerable
assert.isFalse(map.has("__proto__"));
assert.isUndefined(map.get("__proto__"));
var map = d3.map(Object.create(null, {foo: {value: 42, enumerable: false}}));
assert.isFalse(map.has("foo"));
assert.isUndefined(map.get("foo"));
}
},
"forEach": {
"empty maps have an empty keys array": function() {
var map = d3.map();
assert.deepEqual(map.entries(), []);
map.set("foo", "bar");
assert.deepEqual(map.entries(), [{key: "foo", value: "bar"}]);
map.delete("foo");
assert.deepEqual(map.entries(), []);
},
"keys are returned in arbitrary order": function() {
var map = d3.map({foo: 1, bar: "42"});
assert.deepEqual(map.entries().sort(ascendingByKey), [{key: "bar", value: "42"}, {key: "foo", value: 1}]);
var map = d3.map({bar: "42", foo: 1});
assert.deepEqual(map.entries().sort(ascendingByKey), [{key: "bar", value: "42"}, {key: "foo", value: 1}]);
},
"observes changes via set and delete": function() {
var map = d3.map({foo: 1, bar: "42"});
assert.deepEqual(map.entries().sort(ascendingByKey), [{key: "bar", value: "42"}, {key: "foo", value: 1}]);
map.delete("foo");
assert.deepEqual(map.entries(), [{key: "bar", value: "42"}]);
map.set("bar", "bar");
assert.deepEqual(map.entries(), [{key: "bar", value: "bar"}]);
map.set("foo", "foo");
assert.deepEqual(map.entries().sort(ascendingByKey), [{key: "bar", value: "bar"}, {key: "foo", value: "foo"}]);
map.delete("bar");
assert.deepEqual(map.entries(), [{key: "foo", value: "foo"}]);
map.delete("foo");
assert.deepEqual(map.entries(), []);
map.delete("foo");
assert.deepEqual(map.entries(), []);
}
},
"keys": {
"returns an array of string keys": function() {
var map = d3.map({foo: 1, bar: "42"});
assert.deepEqual(map.keys().sort(), ["bar", "foo"]);
}
},
"values": {
"returns an array of arbitrary values": function() {
var map = d3.map({foo: 1, bar: "42"});
assert.deepEqual(map.values().sort(), [1, "42"]);
}
},
"entries": {
"returns an array of key-value objects": function() {
var map = d3.map({foo: 1, bar: "42"});
assert.deepEqual(map.entries().sort(ascendingByKey), [{key: "bar", value: "42"}, {key: "foo", value: 1}]);
}
},
"has": {
"empty maps do not have object built-ins": function() {
var map = d3.map();
assert.isFalse(map.has("__proto__"));
assert.isFalse(map.has("hasOwnProperty"));
},
"can has keys using built-in names": function() {
var map = d3.map();
map.set("__proto__", 42);
assert.isTrue(map.has("__proto__"));
},
"can has keys with null or undefined properties": function() {
var map = d3.map();
map.set("", "");
map.set("null", null);
map.set("undefined", undefined);
assert.isTrue(map.has(""));
assert.isTrue(map.has("null"));
assert.isTrue(map.has("undefined"));
},
"coerces keys to strings": function() {
var map = d3.map({"42": "foo", "null": 1, "undefined": 2});
assert.isTrue(map.has(42));
assert.isTrue(map.has(null));
assert.isTrue(map.has(undefined));
},
"returns the latest value": function() {
var map = d3.map({foo: 42});
assert.isTrue(map.has("foo"));
map.set("foo", 43);
assert.isTrue(map.has("foo"));
map.delete("foo");
assert.isFalse(map.has("foo"));
map.set("foo", "bar");
assert.isTrue(map.has("foo"));
},
"returns undefined for missing keys": function() {
var map = d3.map({foo: 42});
assert.isFalse(map.has("bar"));
}
},
"get": {
"empty maps do not have object built-ins": function() {
var map = d3.map();
assert.isUndefined(map.get("__proto__"));
assert.isUndefined(map.get("hasOwnProperty"));
},
"can get keys using built-in names": function() {
var map = d3.map();
map.set("__proto__", 42);
assert.equal(map.get("__proto__"), 42);
},
"coerces keys to strings": function() {
var map = d3.map({"42": 1, "null": 2, "undefined": 3});
assert.equal(map.get(42), 1);
assert.equal(map.get(null), 2);
assert.equal(map.get(undefined), 3);
},
"returns the latest value": function() {
var map = d3.map({foo: 42});
assert.equal(map.get("foo"), 42);
map.set("foo", 43);
assert.equal(map.get("foo"), 43);
map.delete("foo");
assert.isUndefined(map.get("foo"));
map.set("foo", "bar");
assert.equal(map.get("foo"), "bar");
},
"returns undefined for missing keys": function() {
var map = d3.map({foo: 42});
assert.isUndefined(map.get("bar"));
}
},
"set": {
"returns undefined": function() {
var map = d3.map();
assert.isUndefined(map.set("foo", 42));
},
"can set keys using built-in names": function() {
var map = d3.map();
map.set("__proto__", 42);
assert.equal(map.get("__proto__"), 42);
},
"coerces keys to strings": function() {
var map = d3.map();
map.set(42, 1);
assert.equal(map.get(42), 1);
map.set(null, 2);
assert.equal(map.get(null), 2);
map.set(undefined, 3);
assert.equal(map.get(undefined), 3);
assert.deepEqual(map.keys().sort(), ["42", "null", "undefined"]);
},
"can replace values": function() {
var map = d3.map({foo: 42});
assert.equal(map.get("foo"), 42);
map.set("foo", 43);
assert.equal(map.get("foo"), 43);
map.set("foo", "bar");
assert.equal(map.get("foo"), "bar");
},
"can set null, undefined or empty string values": function() {
var map = d3.map();
map.set("", "");
map.set("null", null);
map.set("undefined", undefined);
assert.equal(map.get(""), "");
assert.isNull(map.get("null"));
assert.isUndefined(map.get("undefined"));
}
}
});
function ascendingByKey(a, b) {
return d3.ascending(a.key, b.key);
}
suite.export(module);