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transition-test.js
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transition-test.js
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var tape = require("tape"),
jsdom = require("../jsdom"),
d3_timer = require("d3-timer"),
d3_ease = require("d3-ease"),
d3_selection = require("d3-selection"),
d3_transition = require("../../");
tape("selection.transition() returns an instanceof d3.transition", function(test) {
var root = jsdom().documentElement,
selection = d3_selection.select(root),
transition = selection.transition();
test.equal(transition instanceof d3_transition.transition, true);
test.end();
});
tape("selection.transition() uses the default timing parameters", function(test) {
var root = jsdom().documentElement,
selection = d3_selection.select(root),
transition = selection.transition(),
schedule = root.__transition[transition._id];
test.equal(schedule.time, d3_timer.now());
test.equal(schedule.delay, 0);
test.equal(schedule.duration, 250);
test.equal(schedule.ease, d3_ease.easeCubic);
test.end();
});
tape("selection.transition() assigns a monotonically-increasing id", function(test) {
var root = jsdom().documentElement,
selection = d3_selection.select(root),
transition1 = selection.transition(),
transition2 = selection.transition(),
transition3 = selection.transition();
test.ok(transition2._id > transition1._id);
test.ok(transition3._id > transition2._id);
test.end();
});
tape("selection.transition() uses a default name of null", function(test) {
var root = jsdom().documentElement,
selection = d3_selection.select(root),
transition = selection.transition(),
schedule = root.__transition[transition._id];
test.strictEqual(schedule.name, null);
test.end();
});
tape("selection.transition(null) uses a name of null", function(test) {
var root = jsdom().documentElement,
selection = d3_selection.select(root),
transition = selection.transition(null),
schedule = root.__transition[transition._id];
test.strictEqual(schedule.name, null);
test.end();
});
tape("selection.transition(undefined) uses a name of null", function(test) {
var root = jsdom().documentElement,
selection = d3_selection.select(root),
transition = selection.transition(undefined),
schedule = root.__transition[transition._id];
test.strictEqual(schedule.name, null);
test.end();
});
tape("selection.transition(name) uses the specified name", function(test) {
var root = jsdom().documentElement,
selection = d3_selection.select(root),
transition = selection.transition("foo"),
schedule = root.__transition[transition._id];
test.strictEqual(schedule.name, "foo");
test.end();
});
tape("selection.transition(name) coerces the name to a string", function(test) {
var root = jsdom().documentElement,
selection = d3_selection.select(root),
transition = selection.transition({toString: function() { return "foo"; }}),
schedule = root.__transition[transition._id];
test.strictEqual(schedule.name, "foo");
test.end();
});
tape("selection.transition(transition) inherits the id, name and timing from the corresponding parent in the specified transition", function(test) {
var document = jsdom("<h1 id='one'><child></h1><h1 id='two'><child></h1>"),
one = document.querySelector("#one"),
two = document.querySelector("#two"),
selection = d3_selection.selectAll([one, two]),
transition = selection.transition().delay(function(d, i) { return i * 50; }).duration(100).ease(d3_ease.easeBounce),
schedule1 = one.__transition[transition._id],
schedule2 = two.__transition[transition._id],
transition1b = d3_selection.select(one.firstChild).transition(transition),
schedule1b = one.firstChild.__transition[transition._id];
test.equal(transition1b._id, transition._id);
test.equal(schedule1b.name, schedule1.name);
test.equal(schedule1b.delay, schedule1.delay);
test.equal(schedule1b.duration, schedule1.duration);
test.equal(schedule1b.ease, schedule1.ease);
test.equal(schedule1b.time, schedule1.time);
d3_timer.timeout(function() {
var transition2b = d3_selection.select(two.firstChild).transition(transition),
schedule2b = two.firstChild.__transition[transition._id];
test.equal(transition2b._id, transition._id);
test.equal(schedule2b.name, schedule2.name);
test.equal(schedule2b.delay, schedule2.delay);
test.equal(schedule2b.duration, schedule2.duration);
test.equal(schedule2b.ease, schedule2.ease);
test.equal(schedule2b.time, schedule2.time);
test.end();
}, 10);
});
tape("selection.transition(transition) reselects the existing transition with the specified transition’s id, if any", function(test) {
var root = jsdom().documentElement,
foo = function foo() {},
bar = function bar() {},
selection = d3_selection.select(root),
transition1 = selection.transition().tween("tween", foo),
schedule1 = root.__transition[transition1._id],
transition2 = selection.transition(transition1).tween("tween", bar),
schedule2 = root.__transition[transition2._id];
test.equal(transition1._id, transition2._id);
test.equal(schedule1, schedule2);
test.equal(transition1.tween("tween"), bar);
test.equal(transition2.tween("tween"), bar);
test.end();
});
tape("selection.transition(transition) throws an error if the specified transition is not found", function(test) {
var document = jsdom("<h1 id='one'></h1><h1 id='two'></h1>"),
one = document.querySelector("#one"),
two = document.querySelector("#two"),
transition1 = d3_selection.select(one).transition(),
transition2 = d3_selection.select(two).transition().delay(50);
try {
d3_selection.select(two).transition(transition1);
test.fail();
} catch (error) {
test.deepEqual(error.message, `transition ${transition1._id} not found`);
}
try {
d3_selection.select(one).transition(transition2);
test.fail();
} catch (error) {
test.deepEqual(error.message, `transition ${transition2._id} not found`);
}
test.end();
});