diff -r efd9c589177a -r c0b4a8b5a012 toolkit/javascript/d3/test/scale/sqrt-test.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/test/scale/sqrt-test.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,256 @@
+require("../env");
+require("../../d3");
+
+var vows = require("vows"),
+    assert = require("assert");
+
+var suite = vows.describe("d3.scale.sqrt");
+
+suite.addBatch({
+  "sqrt": {
+    topic: function() {
+      return d3.scale.sqrt;
+    },
+
+    "domain": {
+      "defaults to [0, 1]": function(sqrt) {
+        var x = sqrt();
+        assert.deepEqual(x.domain(), [0, 1]);
+        assert.inDelta(x(.5), 0.7071068, 1e-6);
+      },
+      "coerces domain to numbers": function(sqrt) {
+        var x = sqrt().domain([new Date(1990, 0, 1), new Date(1991, 0, 1)]);
+        assert.equal(typeof x.domain()[0], "number");
+        assert.equal(typeof x.domain()[1], "number");
+        assert.inDelta(x(new Date(1989, 09, 20)), -.2, 1e-2);
+        assert.inDelta(x(new Date(1990, 00, 01)), 0, 1e-2);
+        assert.inDelta(x(new Date(1990, 02, 15)), .2, 1e-2);
+        assert.inDelta(x(new Date(1990, 04, 27)), .4, 1e-2);
+        assert.inDelta(x(new Date(1991, 00, 01)), 1, 1e-2);
+        assert.inDelta(x(new Date(1991, 02, 15)), 1.2, 1e-2);
+        var x = sqrt().domain(["0", "1"]);
+        assert.equal(typeof x.domain()[0], "number");
+        assert.equal(typeof x.domain()[1], "number");
+        assert.inDelta(x(.5), 0.7071068, 1e-6);
+        var x = sqrt().domain([new Number(0), new Number(1)]);
+        assert.equal(typeof x.domain()[0], "number");
+        assert.equal(typeof x.domain()[1], "number");
+        assert.inDelta(x(.5), 0.7071068, 1e-6);
+      },
+      "can specify a polypower domain and range": function(sqrt) {
+        var x = sqrt().domain([-10, 0, 100]).range(["red", "white", "green"]);
+        assert.equal(x(-5), "#ff4b4b");
+        assert.equal(x(50), "#4ba54b");
+        assert.equal(x(75), "#229122");
+      }
+    },
+
+    "range": {
+      "defaults to [0, 1]": function(sqrt) {
+        var x = sqrt();
+        assert.deepEqual(x.range(), [0, 1]);
+        assert.inDelta(x.invert(.5), .25, 1e-6);
+      },
+      "does not coerce range to numbers": function(sqrt) {
+        var x = sqrt().range(["0", "2"]);
+        assert.equal(typeof x.range()[0], "string");
+        assert.equal(typeof x.range()[1], "string");
+      },
+      "coerces range value to number on invert": function(sqrt) {
+        var x = sqrt().range(["0", "2"]);
+        assert.inDelta(x.invert("1"), .25, 1e-6);
+        var x = sqrt().range([new Date(1990, 0, 1), new Date(1991, 0, 1)]);
+        assert.inDelta(x.invert(new Date(1990, 6, 2, 13)), .25, 1e-6);
+        var x = sqrt().range(["#000", "#fff"]);
+        assert.isNaN(x.invert("#999"));
+      },
+      "can specify range values as colors": function(sqrt) {
+        var x = sqrt().range(["red", "blue"]);
+        assert.equal(x(.25), "#800080");
+        var x = sqrt().range(["#ff0000", "#0000ff"]);
+        assert.equal(x(.25), "#800080");
+        var x = sqrt().range(["#f00", "#00f"]);
+        assert.equal(x(.25), "#800080");
+        var x = sqrt().range([d3.rgb(255,0,0), d3.hsl(240,1,.5)]);
+        assert.equal(x(.25), "#800080");
+        var x = sqrt().range(["hsl(0,100%,50%)", "hsl(240,100%,50%)"]);
+        assert.equal(x(.25), "#800080");
+      },
+      "can specify range values as arrays or objects": function(sqrt) {
+        var x = sqrt().range([{color: "red"}, {color: "blue"}]);
+        assert.deepEqual(x(.25), {color: "#800080"});
+        var x = sqrt().range([["red"], ["blue"]]);
+        assert.deepEqual(x(.25), ["#800080"]);
+      }
+    },
+
+    "exponent": {
+      "defaults to .5": function(sqrt) {
+        var x = sqrt();
+        assert.equal(x.exponent(), .5);
+      },
+      "observes the specified exponent": function(sqrt) {
+        var x = sqrt().exponent(.5).domain([1, 2]);
+        assert.inDelta(x(1), 0, 1e-6);
+        assert.inDelta(x(1.5), 0.5425821, 1e-6);
+        assert.inDelta(x(2), 1, 1e-6);
+        var x = sqrt().exponent(2).domain([1, 2]);
+        assert.inDelta(x(1), 0, 1e-6);
+        assert.inDelta(x(1.5), .41666667, 1e-6);
+        assert.inDelta(x(2), 1, 1e-6);
+        var x = sqrt().exponent(-1).domain([1, 2]);
+        assert.inDelta(x(1), 0, 1e-6);
+        assert.inDelta(x(1.5), .6666667, 1e-6);
+        assert.inDelta(x(2), 1, 1e-6);
+      },
+      "changing the exponent does not change the domain or range": function(sqrt) {
+        var x = sqrt().domain([1, 2]).range([3, 4]), f = d3.format(".6f");
+        x.exponent(.5);
+        assert.deepEqual(x.domain().map(f), [1, 2]);
+        assert.deepEqual(x.range(), [3, 4]);
+        x.exponent(2);
+        assert.deepEqual(x.domain().map(f), [1, 2]);
+        assert.deepEqual(x.range(), [3, 4]);
+        x.exponent(-1);
+        assert.deepEqual(x.domain().map(f), [1, 2]);
+        assert.deepEqual(x.range(), [3, 4]);
+      }
+    },
+
+    "interpolate": {
+      "defaults to d3.interpolate": function(sqrt) {
+        var x = sqrt().range(["red", "blue"]);
+        assert.equal(x.interpolate(), d3.interpolate);
+        assert.equal(x(.5), "#4b00b4");
+      },
+      "can specify a custom interpolator": function(sqrt) {
+        var x = sqrt().range(["red", "blue"]).interpolate(d3.interpolateHsl);
+        assert.equal(x(.25), "#00ff00");
+      }
+    },
+
+    "clamp": {
+      "defaults to false": function(sqrt) {
+        var x = sqrt();
+        assert.isFalse(x.clamp());
+        assert.inDelta(x(-.5), -0.7071068, 1e-6);
+        assert.inDelta(x(1.5), 1.22474487, 1e-6);
+      },
+      "can clamp to the domain": function(sqrt) {
+        var x = sqrt().clamp(true);
+        assert.inDelta(x(-.5), 0, 1e-6);
+        assert.inDelta(x(.25), .5, 1e-6);
+        assert.inDelta(x(1.5), 1, 1e-6);
+        var x = sqrt().domain([1, 0]).clamp(true);
+        assert.inDelta(x(-.5), 1, 1e-6);
+        assert.inDelta(x(.25), .5, 1e-6);
+        assert.inDelta(x(1.5), 0, 1e-6);
+      }
+    },
+
+    "maps a number to a number": function(sqrt) {
+      var x = sqrt().domain([1, 2]);
+      assert.inDelta(x(.5), -0.7071068, 1e-6);
+      assert.inDelta(x(1), 0, 1e-6);
+      assert.inDelta(x(1.5), 0.5425821, 1e-6);
+      assert.inDelta(x(2), 1, 1e-6);
+      assert.inDelta(x(2.5), 1.4029932, 1e-6);
+    },
+
+    "ticks": {
+      "can generate ticks of varying degree": function(sqrt) {
+        var x = sqrt();
+        assert.deepEqual(x.ticks(1).map(x.tickFormat(1)), [0, 1]);
+        assert.deepEqual(x.ticks(2).map(x.tickFormat(2)), [0, .5, 1]);
+        assert.deepEqual(x.ticks(5).map(x.tickFormat(5)), [0, .2, .4, .6, .8, 1]);
+        assert.deepEqual(x.ticks(10).map(x.tickFormat(10)), [0, .1, .2, .3, .4, .5, .6, .7, .8, .9, 1]);
+        var x = sqrt().domain([1, 0]);
+        assert.deepEqual(x.ticks(1).map(x.tickFormat(1)), [0, 1]);
+        assert.deepEqual(x.ticks(2).map(x.tickFormat(2)), [0, .5, 1]);
+        assert.deepEqual(x.ticks(5).map(x.tickFormat(5)), [0, .2, .4, .6, .8, 1]);
+        assert.deepEqual(x.ticks(10).map(x.tickFormat(10)), [0, .1, .2, .3, .4, .5, .6, .7, .8, .9, 1]);
+      }
+    },
+
+    "nice": {
+      "can nice the domain, extending it to round numbers": function(sqrt) {
+        var x = sqrt().domain([1.1, 10.9]).nice(), f = d3.format(".6f");
+        assert.deepEqual(x.domain().map(f), [1, 11]);
+        var x = sqrt().domain([10.9, 1.1]).nice();
+        assert.deepEqual(x.domain().map(f), [11, 1]);
+        var x = sqrt().domain([.7, 11.001]).nice();
+        assert.deepEqual(x.domain().map(f), [0, 12]);
+        var x = sqrt().domain([123.1, 6.7]).nice();
+        assert.deepEqual(x.domain().map(f), [130, 0]);
+        var x = sqrt().domain([0, .49]).nice();
+        assert.deepEqual(x.domain().map(f), [0, .5]);
+      },
+      "nicing a polypower domain only affects the extent": function(sqrt) {
+        var x = sqrt().domain([1.1, 1, 2, 3, 10.9]).nice(), f = d3.format(".6f");
+        assert.deepEqual(x.domain().map(f), [1, 1, 2, 3, 11]);
+        var x = sqrt().domain([123.1, 1, 2, 3, -.9]).nice();
+        assert.deepEqual(x.domain().map(f), [130, 1, 2, 3, "−10.000000"]);
+      }
+    },
+
+    "copy": {
+      "changes to the domain are isolated": function(sqrt) {
+        var x = sqrt(), y = x.copy();
+        x.domain([1, 2]);
+        assert.deepEqual(y.domain(), [0, 1]);
+        assert.equal(x(1), 0);
+        assert.equal(y(1), 1);
+        y.domain([2, 3]);
+        assert.equal(x(2), 1);
+        assert.equal(y(2), 0);
+        assert.inDelta(x.domain(), [1, 2], 1e-6);
+        assert.inDelta(y.domain(), [2, 3], 1e-6);
+      },
+      "changes to the range are isolated": function(sqrt) {
+        var x = sqrt(), y = x.copy();
+        x.range([1, 2]);
+        assert.equal(x.invert(1), 0);
+        assert.equal(y.invert(1), 1);
+        assert.deepEqual(y.range(), [0, 1]);
+        y.range([2, 3]);
+        assert.equal(x.invert(2), 1);
+        assert.equal(y.invert(2), 0);
+        assert.deepEqual(x.range(), [1, 2]);
+        assert.deepEqual(y.range(), [2, 3]);
+      },
+      "changes to the exponent are isolated": function(sqrt) {
+        var x = sqrt().exponent(2), y = x.copy();
+        x.exponent(.5);
+        assert.inDelta(x(.5), Math.SQRT1_2, 1e-6);
+        assert.inDelta(y(.5), 0.25, 1e-6);
+        assert.equal(x.exponent(), .5);
+        assert.equal(y.exponent(), 2);
+        y.exponent(3);
+        assert.inDelta(x(.5), Math.SQRT1_2, 1e-6);
+        assert.inDelta(y(.5), 0.125, 1e-6);
+        assert.equal(x.exponent(), .5);
+        assert.equal(y.exponent(), 3);
+      },
+      "changes to the interpolator are isolated": function(sqrt) {
+        var x = sqrt().range(["red", "blue"]), y = x.copy();
+        x.interpolate(d3.interpolateHsl);
+        assert.equal(x(0.5), "#00ffd3");
+        assert.equal(y(0.5), "#4b00b4");
+        assert.equal(y.interpolate(), d3.interpolate);
+      },
+      "changes to clamping are isolated": function(sqrt) {
+        var x = sqrt().clamp(true), y = x.copy();
+        x.clamp(false);
+        assert.equal(x(2), Math.SQRT2);
+        assert.equal(y(2), 1);
+        assert.isTrue(y.clamp());
+        y.clamp(false);
+        assert.equal(x(2), Math.SQRT2);
+        assert.equal(y(2), Math.SQRT2);
+        assert.isFalse(x.clamp());
+      }
+    }
+  }
+});
+
+suite.export(module);