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76 lines (72 loc) · 2.74 KB
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require("../env");
require("../../d3");
var vows = require("vows"),
assert = require("assert");
var suite = vows.describe("d3.scale.ordinal");
suite.addBatch({
"ordinal": {
topic: function() {
return d3.scale.ordinal;
},
"has an empty domain by default": function(ordinal) {
assert.isEmpty(ordinal().domain());
},
"has an empty range by default": function(ordinal) {
assert.isEmpty(ordinal().range());
},
"maps distinct domain values to discrete range values": function(ordinal) {
var x = ordinal().range(["a", "b", "c"]);
assert.equal(x(0), "a");
assert.equal(x("0"), "a");
assert.equal(x([0]), "a");
assert.equal(x(1), "b");
assert.equal(x(2.0), "c");
assert.equal(x(new Number(2)), "c");
},
"recycles range values when exhausted": function(ordinal) {
var x = ordinal().range(["a", "b", "c"]);
assert.equal(x(0), "a");
assert.equal(x(1), "b");
assert.equal(x(2), "c");
assert.equal(x(3), "a");
assert.equal(x(4), "b");
assert.equal(x(5), "c");
assert.equal(x(2), "c");
assert.equal(x(1), "b");
assert.equal(x(0), "a");
},
"computes discrete points in a continuous range": function(ordinal) {
var x = ordinal().domain(["a", "b", "c"]).rangePoints([0, 120]);
assert.deepEqual(x.range(), [0, 60, 120]);
assert.equal(x.rangeBand(), 0);
var x = ordinal().domain(["a", "b", "c"]).rangePoints([0, 120], 1);
assert.deepEqual(x.range(), [20, 60, 100]);
assert.equal(x.rangeBand(), 0);
},
"computes discrete bands in a continuous range": function(ordinal) {
var x = ordinal().domain(["a", "b", "c"]).rangeBands([0, 120]);
assert.deepEqual(x.range(), [0, 40, 80]);
assert.equal(x.rangeBand(), 40);
var x = ordinal().domain(["a", "b", "c"]).rangeBands([0, 120], .2);
assert.deepEqual(x.range(), [7.5, 45, 82.5]);
assert.equal(x.rangeBand(), 30);
},
"computes discrete rounded bands in a continuous range": function(ordinal) {
var x = ordinal().domain(["a", "b", "c"]).rangeRoundBands([0, 100]);
assert.deepEqual(x.range(), [1, 34, 67]);
assert.equal(x.rangeBand(), 33);
var x = ordinal().domain(["a", "b", "c"]).rangeRoundBands([0, 100], .2);
assert.deepEqual(x.range(), [7, 38, 69]);
assert.equal(x.rangeBand(), 25);
},
"setting domain recomputes range bands": function(ordinal) {
var x = ordinal().rangeRoundBands([0, 100]).domain(["a", "b", "c"]);
assert.deepEqual(x.range(), [1, 34, 67]);
assert.equal(x.rangeBand(), 33);
x.domain(["a", "b", "c", "d"]);
assert.deepEqual(x.range(), [0, 25, 50, 75]);
assert.equal(x.rangeBand(), 25);
}
}
});
suite.export(module);