require("../env");

require("../../d3");

var vows = require("vows"),

    assert = require("assert");

var suite = vows.describe("d3.scale.log");

suite.addBatch({

  "log": {

    topic: function() {

      return d3.scale.log;

    },

    "domain": {

      "defaults to [1, 10]": function(log) {

        var x = log();

        assert.deepEqual(x.domain(), [1, 10]);

        assert.inDelta(x(5), 0.69897, 1e-6);

      },

      "coerces domain values to numbers": function(log) {

        var x = log().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 = log().domain(["1", "10"]);

        assert.equal(typeof x.domain()[0], "number");

        assert.equal(typeof x.domain()[1], "number");

        assert.inDelta(x(5), 0.69897, 1e-6);

        var x = log().domain([new Number(1), new Number(10)]);

        assert.equal(typeof x.domain()[0], "number");

        assert.equal(typeof x.domain()[1], "number");

        assert.inDelta(x(5), 0.69897, 1e-6);

      },

      "can specify negative domain values": function(log) {

        var x = log().domain([-100, -1]);

        assert.deepEqual(x.ticks().map(x.tickFormat()), [

          "−1e+2",

          "−9e+1", "−8e+1", "−7e+1", "−6e+1", "−5e+1", "−4e+1", "−3e+1", "−2e+1", "−1e+1",

          "−9e+0", "−8e+0", "−7e+0", "−6e+0", "−5e+0", "−4e+0", "−3e+0", "−2e+0", "−1e+0"

        ]);

        assert.inDelta(x(-50), 0.150515, 1e-6);

      },

      "can specify a polylog domain and range": function(log) {

        var x = log().domain([.1, 1, 100]).range(["red", "white", "green"]);

        assert.equal(x(.5), "#ffb2b2");

        assert.equal(x(50), "#269326");

        assert.equal(x(75), "#108810");

      }

    },

    "range": {

      "defaults to [0, 1]": function(log) {

        var x = log();

        assert.deepEqual(x.range(), [0, 1]);

        assert.inDelta(x.invert(.5), 3.162278, 1e-6);

      },

      "does not coerce range to numbers": function(log) {

        var x = log().range(["0", "2"]);

        assert.equal(typeof x.range()[0], "string");

        assert.equal(typeof x.range()[1], "string");

      },

      "can specify range values as colors": function(log) {

        var x = log().range(["red", "blue"]);

        assert.equal(x(5), "#4d00b2");

        var x = log().range(["#ff0000", "#0000ff"]);

        assert.equal(x(5), "#4d00b2");

        var x = log().range(["#f00", "#00f"]);

        assert.equal(x(5), "#4d00b2");

        var x = log().range([d3.rgb(255,0,0), d3.hsl(240,1,.5)]);

        assert.equal(x(5), "#4d00b2");

        var x = log().range(["hsl(0,100%,50%)", "hsl(240,100%,50%)"]);

        assert.equal(x(5), "#4d00b2");

      },

      "can specify range values as arrays or objects": function(log) {

        var x = log().range([{color: "red"}, {color: "blue"}]);

        assert.deepEqual(x(5), {color: "#4d00b2"});

        var x = log().range([["red"], ["blue"]]);

        assert.deepEqual(x(5), ["#4d00b2"]);

      }

    },

    "interpolate": {

      "defaults to d3.interpolate": function(log) {

        var x = log().range(["red", "blue"]);

        assert.equal(x.interpolate(), d3.interpolate);

        assert.equal(x(5), "#4d00b2");

      },

      "can specify a custom interpolator": function(log) {

        var x = log().range(["red", "blue"]).interpolate(d3.interpolateHsl);

        assert.equal(x(5), "#00ffcb");

      }

    },

    "clamp": {

      "defaults to false": function(log) {

        var x = log();

        assert.isFalse(x.clamp());

        assert.inDelta(x(.5), -0.3010299, 1e-6);

        assert.inDelta(x(15), 1.1760913, 1e-6);

      },

      "can clamp to the domain": function(log) {

        var x = log().clamp(true);

        assert.inDelta(x(.5), 0, 1e-6);

        assert.inDelta(x(5), 0.69897, 1e-6);

        assert.inDelta(x(15), 1, 1e-6);

        var x = log().domain([10, 1]).clamp(true);

        assert.inDelta(x(.5), 1, 1e-6);

        assert.inDelta(x(5), 0.30103, 1e-6);

        assert.inDelta(x(15), 0, 1e-6);

      }

    },

    "maps a number to a number": function(log) {

      var x = log().domain([1, 2]);

      assert.inDelta(x(.5), -1, 1e-6);

      assert.inDelta(x(1), 0, 1e-6);

      assert.inDelta(x(1.5), 0.5849625, 1e-6);

      assert.inDelta(x(2), 1, 1e-6);

      assert.inDelta(x(2.5), 1.3219281, 1e-6);

    },

    "invert": {

      "maps a number to a number": function(log) {

        var x = log().domain([1, 2]);

        assert.inDelta(x.invert(-1), .5, 1e-6);

        assert.inDelta(x.invert(0), 1, 1e-6);

        assert.inDelta(x.invert(0.5849625), 1.5, 1e-6);

        assert.inDelta(x.invert(1), 2, 1e-6);

        assert.inDelta(x.invert(1.3219281), 2.5, 1e-6);

      },

      "coerces range value to number on invert": function(log) {

        var x = log().range(["0", "2"]);

        assert.inDelta(x.invert("1"), 3.1622777, 1e-6);

        var x = log().range([new Date(1990, 0, 1), new Date(1991, 0, 1)]);

        assert.inDelta(x.invert(new Date(1990, 6, 2, 13)), 3.1622777, 1e-6);

        var x = log().range(["#000", "#fff"]);

        assert.isNaN(x.invert("#999"));

      }

    },

    "ticks": {

      "can generate ticks": function(log) {

        var x = log();

        assert.deepEqual(x.ticks().map(x.tickFormat()), [

          "1e+0", "2e+0", "3e+0", "4e+0", "5e+0", "6e+0", "7e+0", "8e+0", "9e+0",

          "1e+1"

        ]);

        var x = log().domain([100, 1]);

        assert.deepEqual(x.ticks().map(x.tickFormat()), [

          "1e+0", "2e+0", "3e+0", "4e+0", "5e+0", "6e+0", "7e+0", "8e+0", "9e+0",

          "1e+1", "2e+1", "3e+1", "4e+1", "5e+1", "6e+1", "7e+1", "8e+1", "9e+1",

          "1e+2"

        ]);

      },

      "can generate fewer ticks, if desired": function(log) {

        var x = log();

        assert.deepEqual(x.ticks().map(x.tickFormat(5)), [

          "1e+0", "2e+0", "3e+0", "4e+0", "", "", "", "", "",

          "1e+1"

        ]);

        var x = log().domain([100, 1]);

        assert.deepEqual(x.ticks().map(x.tickFormat(10)), [

          "1e+0", "2e+0", "3e+0", "4e+0", "5e+0", "", "", "", "",

          "1e+1", "2e+1", "3e+1", "4e+1", "5e+1", "", "", "", "",

          "1e+2"

        ]);

      },

      "can override the tick format": function(log) {

        var x = log().domain([1000, 1]);

        assert.deepEqual(x.ticks().map(x.tickFormat(10, d3.format("+,d"))), [

          "+1", "+2", "+3", "", "", "", "", "", "",

          "+10", "+20", "+30", "", "", "", "", "", "",

          "+100", "+200", "+300", "", "", "", "", "", "",

          "+1,000"

        ]);

      }

    },

    "nice": {

      "can nice the domain, extending it to powers of ten": function(log) {

        var x = log().domain([1.1, 10.9]).nice();

        assert.deepEqual(x.domain(), [1, 100]);

        var x = log().domain([10.9, 1.1]).nice();

        assert.deepEqual(x.domain(), [100, 1]);

        var x = log().domain([.7, 11.001]).nice();

        assert.deepEqual(x.domain(), [.1, 100]);

        var x = log().domain([123.1, 6.7]).nice();

        assert.deepEqual(x.domain(), [1000, 1]);

        var x = log().domain([.01, .49]).nice();

        assert.deepEqual(x.domain(), [.01, 1]);

        var x = log().domain([0, 0]).nice();

        assert.deepEqual(x.domain(), [0, 0]);

        var x = log().domain([.5, .5]).nice();

        assert.inDelta(x.domain(), [.5, .5], 1e-6);

      },

      "nicing a polylog domain only affects the extent": function(log) {

        var x = log().domain([1.1, 1.5, 10.9]).nice();

        assert.deepEqual(x.domain(), [1, 1.5, 100]);

        var x = log().domain([-123.1, -1.5, -.5]).nice();

        assert.deepEqual(x.domain(), [-1000, -1.5, -.1]);

      }

    },

    "copy": {

      "changes to the domain are isolated": function(log) {

        var x = log(), y = x.copy();

        x.domain([10, 100]);

        assert.deepEqual(y.domain(), [1, 10]);

        assert.equal(x(10), 0);

        assert.equal(y(1), 0);

        y.domain([100, 1000]);

        assert.equal(x(100), 1);

        assert.equal(y(100), 0);

        assert.deepEqual(x.domain(), [10, 100]);

        assert.deepEqual(y.domain().map(Math.round), [100, 1000]);

      },

      "changes to the range are isolated": function(log) {

        var x = log(), y = x.copy();

        x.range([1, 2]);

        assert.equal(x.invert(1), 1);

        assert.equal(y.invert(1), 10);

        assert.deepEqual(y.range(), [0, 1]);

        y.range([2, 3]);

        assert.equal(x.invert(2), 10);

        assert.equal(y.invert(2), 1);

        assert.deepEqual(x.range(), [1, 2]);

        assert.deepEqual(y.range(), [2, 3]);

      },

      "changes to the interpolator are isolated": function(log) {

        var x = log().range(["red", "blue"]), y = x.copy();

        x.interpolate(d3.interpolateHsl);

        assert.equal(x(5), "#00ffcb");

        assert.equal(y(5), "#4d00b2");

        assert.equal(y.interpolate(), d3.interpolate);

      },

      "changes to clamping are isolated": function(log) {

        var x = log().clamp(true), y = x.copy();

        x.clamp(false);

        assert.inDelta(x(.5), -0.30103, 1e-6);

        assert.equal(y(.5), 0);

        assert.isTrue(y.clamp());

        y.clamp(false);

        assert.inDelta(x(20), 1.30103, 1e-6);

        assert.inDelta(y(20), 1.30103, 1e-6);

        assert.isFalse(x.clamp());

      }

    }

  }

});

suite.export(module);