var vows = require(“vows”),
load = require("../load"), assert = require("../assert");
var suite = vows.describe(“d3.interpolateString”);
suite.addBatch({
"interpolateString": { topic: load("interpolate/string").expression("d3.interpolateString"), "interpolates matching numbers in both strings": function(interpolate) { assert.strictEqual(interpolate(" 10/20 30", "50/10 100 ")(.2), "18/18 44 "); assert.strictEqual(interpolate(" 10/20 30", "50/10 100 ")(.4), "26/16 58 "); }, "coerces objects to strings": function(interpolate) { assert.strictEqual(interpolate({toString: function() { return "2px"; }}, {toString: function() { return "12px"; }})(.4), "6px"); }, "preserves non-numbers in string b": function(interpolate) { assert.strictEqual(interpolate(" 10/20 30", "50/10 foo ")(.2), "18/18 foo "); assert.strictEqual(interpolate(" 10/20 30", "50/10 foo ")(.4), "26/16 foo "); }, "preserves non-matching numbers in string b": function(interpolate) { assert.strictEqual(interpolate(" 10/20 foo", "50/10 100 ")(.2), "18/18 100 "); assert.strictEqual(interpolate(" 10/20 bar", "50/10 100 ")(.4), "26/16 100 "); }, "preserves equal-value numbers in both strings": function(interpolate) { assert.strictEqual(interpolate(" 10/20 100 20", "50/10 100, 20 ")(.2), "18/18 100, 20 "); assert.strictEqual(interpolate(" 10/20 100 20", "50/10 100, 20 ")(.4), "26/16 100, 20 "); }, "interpolates decimal notation correctly": function(interpolate) { assert.strictEqual(interpolate("1.", "2.")(.5), "1.5"); }, "interpolates exponent notation correctly": function(interpolate) { assert.strictEqual(interpolate("1e+3", "1e+4")(.5), "5500"); assert.strictEqual(interpolate("1e-3", "1e-4")(.5), "0.00055"); assert.strictEqual(interpolate("1.e-3", "1.e-4")(.5), "0.00055"); assert.strictEqual(interpolate("-1.e-3", "-1.e-4")(.5), "-0.00055"); assert.strictEqual(interpolate("+1.e-3", "+1.e-4")(.5), "0.00055"); assert.strictEqual(interpolate(".1e-2", ".1e-3")(.5), "0.00055"); } }
});
suite.export(module);