toolkit/javascript/d3/test/core/min-test.js
changeset 47 c0b4a8b5a012
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/test/core/min-test.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,50 @@
+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);