50 строки
1.6 KiB
JavaScript
50 строки
1.6 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.scale.threshold");
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suite.addBatch({
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"threshold": {
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topic: load("scale/threshold").expression("d3.scale.threshold"),
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"has the default domain [.5]": function(threshold) {
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var x = threshold();
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assert.deepEqual(x.domain(), [.5]);
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assert.equal(x(.49), 0);
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},
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"has the default range [0, 1]": function(threshold) {
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var x = threshold();
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assert.deepEqual(x.range(), [0, 1]);
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assert.equal(x(.50), 1);
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},
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"maps a number to a discrete value in the range": function(threshold) {
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var x = threshold().domain([1/3, 2/3]).range(["a", "b", "c"]);
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assert.equal(x(0), "a");
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assert.equal(x(.2), "a");
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assert.equal(x(.4), "b");
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assert.equal(x(.6), "b");
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assert.equal(x(.8), "c");
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assert.equal(x(1), "c");
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},
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"domain values are arbitrary": function(threshold) {
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var x = threshold().domain(["10", "2"]).range([0, 1, 2]);
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assert.strictEqual(x.domain()[0], "10");
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assert.strictEqual(x.domain()[1], "2");
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assert.equal(x("0"), 0);
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assert.equal(x("12"), 1);
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assert.equal(x("3"), 2);
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},
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"range values are arbitrary": function(threshold) {
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var a = {}, b = {}, c = {}, x = threshold().domain([1/3, 2/3]).range([a, b, c]);
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assert.equal(x(0), a);
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assert.equal(x(.2), a);
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assert.equal(x(.4), b);
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assert.equal(x(.6), b);
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assert.equal(x(.8), c);
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assert.equal(x(1), c);
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}
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}
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});
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suite.export(module);
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