44 строки
1.4 KiB
JavaScript
44 строки
1.4 KiB
JavaScript
var vows = require("vows"),
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load = require("../load"),
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assert = require("../assert");
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var suite = vows.describe("d3.sum");
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suite.addBatch({
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"sum": {
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topic: load("arrays/sum").expression("d3.sum"),
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"sums numbers": function(sum) {
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assert.equal(sum([1]), 1);
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assert.equal(sum([5, 1, 2, 3, 4]), 15);
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assert.equal(sum([20, 3]), 23);
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assert.equal(sum([3, 20]), 23);
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},
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"sums types that can be coerced to numbers": function(sum) {
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assert.equal(sum(["20", "3"]), 23);
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assert.equal(sum(["3", "20"]), 23);
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assert.equal(sum(["3", 20]), 23);
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assert.equal(sum([20, "3"]), 23);
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assert.equal(sum([3, "20"]), 23);
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assert.equal(sum(["20", 3]), 23);
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},
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"ignores non-numeric types": function(sum) {
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assert.equal(sum(["a", "b", "c"]), 0);
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assert.equal(sum(["a", 1, "2"]), 3);
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},
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"ignores null, undefined and NaN": function(sum) {
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assert.equal(sum([NaN, 1, 2, 3, 4, 5]), 15);
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assert.equal(sum([1, 2, 3, 4, 5, NaN]), 15);
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assert.equal(sum([10, null, 3, undefined, 5, NaN]), 18);
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},
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"applies the optional acccessor function": function(sum) {
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assert.equal(sum([[1, 2, 3, 4, 5], [2, 4, 6, 8, 10]], function(d) { return sum(d); }), 45);
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assert.equal(sum([1, 2, 3, 4, 5], function(d, i) { return i; }), 10);
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},
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"returns zero for the empty array": function(sum) {
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assert.equal(sum([]), 0);
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}
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}
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});
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suite.export(module);
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