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Contents
var vows = require("vows"),
load = require("../load"),
assert = require("../assert");
var suite = vows.describe("d3.permute");
suite.addBatch({
"permute": {
topic: load("arrays/permute").expression("d3.permute"),
"permutes according to the specified index": function(permute) {
assert.deepEqual(permute([3, 4, 5], [2, 1, 0]), [5, 4, 3]);
assert.deepEqual(permute([3, 4, 5], [2, 0, 1]), [5, 3, 4]);
assert.deepEqual(permute([3, 4, 5], [0, 1, 2]), [3, 4, 5]);
},
"does not modify the input array": function(permute) {
var input = [3, 4, 5];
permute(input, [2, 1, 0]);
assert.deepEqual(input, [3, 4, 5]);
},
"can duplicate input values": function(permute) {
assert.deepEqual(permute([3, 4, 5], [0, 1, 0]), [3, 4, 3]);
assert.deepEqual(permute([3, 4, 5], [2, 2, 2]), [5, 5, 5]);
assert.deepEqual(permute([3, 4, 5], [0, 1, 1]), [3, 4, 4]);
},
"can return more elements": function(permute) {
assert.deepEqual(permute([3, 4, 5], [0, 0, 1, 2]), [3, 3, 4, 5]);
assert.deepEqual(permute([3, 4, 5], [0, 1, 1, 1]), [3, 4, 4, 4]);
},
"can return fewer elements": function(permute) {
assert.deepEqual(permute([3, 4, 5], [0]), [3]);
assert.deepEqual(permute([3, 4, 5], [1, 2]), [4, 5]);
assert.deepEqual(permute([3, 4, 5], []), []);
},
"can return undefined elements": function(permute) {
var v1 = permute([3, 4, 5], [10]);
assert.equal(v1.length, 1);
assert.isUndefined(v1[0]);
var v2 = permute([3, 4, 5], [-1]);
assert.equal(v2.length, 1);
assert.isUndefined(v2[0]);
var v3 = permute([3, 4, 5], [0, -1]);
assert.equal(v3.length, 2);
assert.equal(v3[0], 3);
assert.isUndefined(v3[1]);
}
}
});
suite.export(module);
Version data entries
4 entries across 4 versions & 2 rubygems