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Contents
var vows = require("vows"),
load = require("../load"),
assert = require("../assert");
var suite = vows.describe("d3.descending");
suite.addBatch({
"descending": {
topic: load("arrays/descending").expression("d3.descending"),
"numbers": {
"returns a negative number if a > b": function(descending) {
assert.isTrue(descending(1, 0) < 0);
},
"returns a positive number if a < b": function(descending) {
assert.isTrue(descending(0, 1) > 0);
},
"returns zero if a == b": function(descending) {
assert.equal(descending(0, 0), 0);
},
"returns NaN if a or b is undefined": function(descending) {
assert.isNaN(descending(0, undefined));
assert.isNaN(descending(undefined, 0));
assert.isNaN(descending(undefined, undefined));
},
"returns NaN if a or b is NaN": function(descending) {
assert.isNaN(descending(0, NaN));
assert.isNaN(descending(NaN, 0));
assert.isNaN(descending(NaN, NaN));
}
},
"strings": {
"returns a negative number if a > b": function(descending) {
assert.isTrue(descending("b", "a") < 0);
},
"returns a positive number if a < b": function(descending) {
assert.isTrue(descending("a", "b") > 0);
},
"returns zero if a == b": function(descending) {
assert.equal(descending("a", "a"), 0);
}
}
}
});
suite.export(module);
Version data entries
4 entries across 4 versions & 2 rubygems