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var vows = require("vows"),
_ = require("../../"),
load = require("../load"),
assert = require("../assert");
var suite = vows.describe("d3.svg.brush");
suite.addBatch({
"brush": {
topic: load("svg/brush").expression("d3.svg.brush").document(),
"x": {
"defaults to null": function(brush) {
assert.isNull(brush().x());
}
},
"y": {
"defaults to null": function(brush) {
assert.isNull(brush().y());
}
},
"clamp": {
"returns null when no scales are attached": function(brush) {
assert.isNull(brush().clamp());
},
"returns a single boolean if only x is defined": function(brush) {
var b = brush().x(_.scale.linear());
assert.isTrue(b.clamp());
},
"returns a single boolean if only y is defined": function(brush) {
var b = brush().y(_.scale.linear());
assert.isTrue(b.clamp());
},
"returns one-dimensional array if both x and y are defined": function(brush) {
var b = brush().x(_.scale.linear()).y(_.scale.linear());
assert.deepEqual(b.clamp(), [true, true]);
},
"takes a single boolean if only x is defined": function(brush) {
var b = brush().x(_.scale.linear()).clamp(false);
assert.isFalse(b.clamp());
},
"takes a single boolean if only y is defined": function(brush) {
var b = brush().y(_.scale.linear()).clamp(false);
assert.isFalse(b.clamp());
},
"takes a one-dimensional array if both x and y are defined": function(brush) {
var b = brush().x(_.scale.linear()).y(_.scale.linear()).clamp([false, true]);
assert.deepEqual(b.clamp(), [false, true]);
b.clamp([true, false]);
assert.deepEqual(b.clamp(), [true, false]);
}
},
"extent": {
"returns null when no scales are attached": function(brush) {
assert.isNull(brush().extent());
},
"returns a one-dimensional array if only x is defined": function(brush) {
var b = brush().x(_.scale.linear());
assert.deepEqual(b.extent(), [0, 0]);
},
"takes a one-dimensional array if only x is defined": function(brush) {
var b = brush().x(_.scale.linear()).extent([0.1, 0.4]);
assert.deepEqual(b.extent(), [0.1, 0.4]);
},
"returns a one-dimensional array if only y is defined": function(brush) {
var b = brush().y(_.scale.linear());
assert.deepEqual(b.extent(), [0, 0]);
},
"takes a one-dimensional array if only y is defined": function(brush) {
var b = brush().y(_.scale.linear()).extent([0.1, 0.4]);
assert.deepEqual(b.extent(), [0.1, 0.4]);
},
"returns a two-dimensional array if x and y are defined": function(brush) {
var b = brush().x(_.scale.linear()).y(_.scale.linear());
assert.deepEqual(b.extent(), [[0, 0], [0, 0]]);
},
"takes a two-dimensional array if x and y are defined": function(brush) {
var b = brush().x(_.scale.linear()).y(_.scale.linear()).extent([[0.1, 0.2], [0.3, 0.4]]);
assert.deepEqual(b.extent(), [[0.1, 0.2], [0.3, 0.4]]);
},
"preserves the set extent exactly": function(brush) {
var lo = new Number(0.1),
hi = new Number(0.3),
b = brush().x(_.scale.linear()).extent([lo, hi]),
extent = b.extent();
assert.strictEqual(extent[0], lo);
assert.strictEqual(extent[1], hi);
}
},
"empty": {
"returns true if and only if any defined extent is empty": function(brush) {
var b = brush();
assert.strictEqual(b.empty(), false); // x and y are undefined
var b = brush().x(_.scale.linear());
assert.strictEqual(b.empty(), true); // x is empty, y is undefined
assert.strictEqual(b.extent([0, 1]).empty(), false); // x is non-empty, y is undefined
var b = brush().y(_.scale.linear());
assert.strictEqual(b.empty(), true); // x is undefined, y is empty
assert.strictEqual(b.extent([0, 1]).empty(), false); // x is undefined, y is non-empty
var b = brush().x(_.scale.linear()).y(_.scale.linear());
assert.strictEqual(b.empty(), true); // x is empty, y is empty
assert.strictEqual(b.extent([[0, 0], [1, 0]]).empty(), true); // x is non-empty, y is empty
assert.strictEqual(b.extent([[0, 0], [0, 1]]).empty(), true); // x is empty, y is non-empty
assert.strictEqual(b.extent([[0, 0], [1, 1]]).empty(), false); // x is non-empty, y is non-empty
}
}
}
});
suite.export(module);