require("../env");

var vows = require("vows"),

assert = require("assert");

var suite = vows.describe("d3.keys");

suite.addBatch({

"keys": {

topic: function() {

return d3.keys;

},

"enumerates every defined key": function(keys) {

assert.deepEqual(keys({a: 1, b: 1}), ["a", "b"]);

},

"includes keys defined on prototypes": function(keys) {

function abc() {

this.a = 1;

this.b = 2;

}

abc.prototype.c = 3;

assert.deepEqual(keys(new abc()), ["a", "b", "c"]);

},

"includes keys with null or undefined values": function(keys) {

assert.deepEqual(keys({a: undefined, b: null, c: NaN}), ["a", "b", "c"]);

}

}

});

suite.export(module);