Tests for transition.on. #20

d3 · Mar 2, 2016 · 92abf1c · 92abf1c
1 parent 557d7bb
commit 92abf1c
Showing 1 changed file with 65 additions and 0 deletions.
diff --git a/test/transition/on-test.js b/test/transition/on-test.js
@@ -1,5 +1,6 @@
 var tape = require("tape"),
     jsdom = require("jsdom"),
+    d3_timer = require("d3-timer"),
     d3_selection = require("d3-selection");
 
 require("../../");
@@ -10,3 +11,67 @@ tape("transition.on(type, listener) throws an error if listener is not a functio
   test.throws(function() { transition.on("start", 42); }, /Error/);
   test.end();
 });
+
+tape("transition.on(typename) returns the listener with the specified typename, if any", function(test) {
+  var root = jsdom.jsdom().documentElement,
+      foo = function() {},
+      bar = function() {},
+      transition = d3_selection.select(root).transition().on("start", foo).on("start.bar", bar);
+  test.equal(transition.on("start"), foo);
+  test.equal(transition.on("start.foo"), undefined);
+  test.equal(transition.on("start.bar"), bar);
+  test.equal(transition.on("end"), undefined);
+  test.end();
+});
+
+tape("transition.on(typename) throws an error if the specified type is not supported", function(test) {
+  var root = jsdom.jsdom().documentElement,
+      transition = d3_selection.select(root).transition();
+  test.throws(function() { transition.on("foo"); }, /Error/);
+  test.end();
+});
+
+tape("transition.on(typename, listener) throws an error if the specified type is not supported", function(test) {
+  var root = jsdom.jsdom().documentElement,
+      transition = d3_selection.select(root).transition();
+  test.throws(function() { transition.on("foo", function() {}); }, /Error/);
+  test.end();
+});
+
+tape("transition.on(\"start\", listener) registers a listener for the start event", function(test) {
+  var root = jsdom.jsdom().documentElement,
+      transition = d3_selection.select(root).transition().on("start", started),
+      schedule = root.__transition[transition._id];
+
+  function started() {
+    test.equal(schedule.state, 2); // STARTING
+    test.end();
+  }
+});
+
+tape("transition.on(\"interrupt\", listener) registers a listener for the interrupt event", function(test) {
+  var root = jsdom.jsdom().documentElement,
+      selection = d3_selection.select(root),
+      transition = selection.transition().on("interrupt", interrupted),
+      schedule = root.__transition[transition._id];
+
+  function interrupted() {
+    test.equal(schedule.state, 5); // ENDED
+    test.end();
+  }
+
+  d3_timer.timeout(function() {
+    selection.interrupt();
+  });
+});
+
+tape("transition.on(\"end\", listener) registers a listener for the end event", function(test) {
+  var root = jsdom.jsdom().documentElement,
+      transition = d3_selection.select(root).transition().duration(50).on("end", ended),
+      schedule = root.__transition[transition._id];
+
+  function ended() {
+    test.equal(schedule.state, 5); // ENDED
+    test.end();
+  }
+});