Add test for registering custom interpolator.

d3 · Jun 11, 2011 · 093089f · 093089f
1 parent 40ba791
commit 093089f
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diff --git a/tests/test-interpolate.js b/tests/test-interpolate.js
@@ -63,3 +63,25 @@ console.log("          0.5  -> ", x(0.5));
 console.log("          1.0  -> ", x(1.0));
 console.log("          1.5  -> ", x(1.5));
 console.log("");
+
+d3.interpolators.push(function(a, b) {
+  return a == "one" && b == "two" && d3.interpolateNumber(1, 2);
+});
+
+var x = d3.interpolate("one", "two");
+console.log("interpolateOneTwo(one, two):");
+console.log("         -0.5  -> ", x(-0.5));
+console.log("          0.0  -> ", x(0.0));
+console.log("          0.5  -> ", x(0.5));
+console.log("          1.0  -> ", x(1.0));
+console.log("          1.5  -> ", x(1.5));
+console.log("");
+
+var x = d3.interpolate("one", "three");
+console.log("interpolate(one, three):");
+console.log("         -0.5  -> ", x(-0.5));
+console.log("          0.0  -> ", x(0.0));
+console.log("          0.5  -> ", x(0.5));
+console.log("          1.0  -> ", x(1.0));
+console.log("          1.5  -> ", x(1.5));
+console.log("");
diff --git a/tests/test-interpolate.out b/tests/test-interpolate.out
@@ -47,3 +47,17 @@ interpolateHsl(red, blue):
           1.0  ->  #0000ff
           1.5  ->  #ff0000
 
+interpolateOneTwo(one, two):
+         -0.5  ->  0.5
+          0.0  ->  1
+          0.5  ->  1.5
+          1.0  ->  2
+          1.5  ->  2.5
+
+interpolate(one, three):
+         -0.5  ->  three
+          0.0  ->  three
+          0.5  ->  three
+          1.0  ->  three
+          1.5  ->  three
+