Add attachLink method with test

tests/scripts/lib/proto/attach-link.js

@@ -0,0 +1,58 @@
+var tape = require("tape")
+
+var on = require("../../../../src/scripts/lib/events/on")
+var trigger = require("../../../../src/scripts/lib/events/trigger")
+var attachLink = require("../../../../src/scripts/lib/proto/attach-link")
+
+var a = document.createElement("a")
+var attr = "data-pjax-click-state"
+var preventDefault = function(e) { e.preventDefault() }
+
+tape("test attach link prototype method", function(t) {
+  t.plan(7)
+
+  attachLink.call({
+    options: {},
+    refresh: function() {
+      t.equal(a.getAttribute(attr), "refresh", "triggering exact same url refresh the page")
+    },
+    loadUrl: function() {
+      t.equal(a.getAttribute(attr), "load", "triggering a internal link actually load the page")
+    }
+  }, a)
+
+  var internalUri = window.location.protocol + "//" + window.location.host + window.location.pathname + window.location.search
+
+  a.href = internalUri
+  on(a, "click", preventDefault) // to avoid link to be open (break testing env)
+  trigger(a, "click", {metaKey: true})
+  t.equal(a.getAttribute(attr), "modifier", "event key modifier stop behavior")
+
+  a.href = "http://external.com/"
+  trigger(a, "click")
+  t.equal(a.getAttribute(attr), "external", "external url stop behavior")
+
+  a.href = internalUri + "#anchor"
+  trigger(a, "click")
+  t.equal(a.getAttribute(attr), "anchor-present", "internal anchor stop behavior")
+
+  window.location.hash = "#anchor"
+  a.href = internalUri + "#another-anchor"
+  trigger(a, "click")
+  t.notEqual(a.getAttribute(attr), "anchor", "differents anchors stop behavior")
+  window.location.hash = ""
+
+  a.href = internalUri + "#"
+  trigger(a, "click")
+  t.equal(a.getAttribute(attr), "anchor-empty", "empty anchor stop behavior")
+
+  a.href = internalUri
+  trigger(a, "click")
+  // see refresh defined above
+
+  a.href = window.location.protocol + "//" + window.location.host + "/internal"
+  trigger(a, "click")
+  // see loadUrl defined above
+
+  t.end()
+})