require("../env");

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

var vows = require("vows"),

    assert = require("assert");

var suite = vows.describe("d3.min");

suite.addBatch({

  "min": {

    topic: function() {

      return d3.min;

    },

    "returns the least numeric value for numbers": function(min) {

      assert.equal(min([1]), 1);

      assert.equal(min([5, 1, 2, 3, 4]), 1);

      assert.equal(min([20, 3]), 3);

      assert.equal(min([3, 20]), 3);

    },

    "returns the least lexicographic value for strings": function(min) {

      assert.equal(min(["c", "a", "b"]), "a");

      assert.equal(min(["20", "3"]), "20");

      assert.equal(min(["3", "20"]), "20");

    },

    "ignores null, undefined and NaN": function(min) {

      assert.equal(min([NaN, 1, 2, 3, 4, 5]), 1);

      assert.equal(min([1, 2, 3, 4, 5, NaN]), 1);

      assert.equal(min([10, null, 3, undefined, 5, NaN]), 3);

    },

    "compares heterogenous types as numbers": function(min) {

      assert.strictEqual(min([20, "3"]), "3");

      assert.strictEqual(min(["20", 3]), 3);

      assert.strictEqual(min([3, "20"]), 3);

      assert.strictEqual(min(["3", 20]), "3");

    },

    "returns undefined for empty array": function(min) {

      assert.isUndefined(min([]));

      assert.isUndefined(min([null]));

      assert.isUndefined(min([undefined]));

      assert.isUndefined(min([NaN]));

      assert.isUndefined(min([NaN, NaN]));

    },

    "applies the optional accessor function": function(min) {

      assert.equal(d3.min([[1, 2, 3, 4, 5], [2, 4, 6, 8, 10]], function(d) { return d3.max(d); }), 5);

      assert.equal(d3.min([1, 2, 3, 4, 5], function(d, i) { return i; }), 0);

    }

  }

});

suite.export(module);