Removes global PDFJS usage from the src/core/.

test/unit/dom_utils_spec.js

@@ -0,0 +1,50 @@
+/* globals expect, it, describe, PDFJS, isExternalLinkTargetSet, LinkTarget,
+           getFilenameFromUrl */
+
+'use strict';
+
+describe('dom_utils', function() {
+  describe('getFilenameFromUrl', function() {
+    it('should get the filename from an absolute URL', function() {
+      var url = 'http://server.org/filename.pdf';
+      var result = getFilenameFromUrl(url);
+      var expected = 'filename.pdf';
+      expect(result).toEqual(expected);
+    });
+
+    it('should get the filename from a relative URL', function() {
+      var url = '../../filename.pdf';
+      var result = getFilenameFromUrl(url);
+      var expected = 'filename.pdf';
+      expect(result).toEqual(expected);
+    });
+  });
+
+  describe('isExternalLinkTargetSet', function() {
+    // Save the current state, to avoid interfering with other tests.
+    var previousExternalLinkTarget = PDFJS.externalLinkTarget;
+
+    it('handles the predefined LinkTargets', function() {
+      for (var key in LinkTarget) {
+        var linkTarget = LinkTarget[key];
+        PDFJS.externalLinkTarget = linkTarget;
+
+        expect(isExternalLinkTargetSet()).toEqual(!!linkTarget);
+      }
+    });
+
+    it('handles incorrect LinkTargets', function() {
+      var targets = [true, '', false, -1, '_blank', null];
+
+      for (var i = 0, ii = targets.length; i < ii; i++) {
+        var linkTarget = targets[i];
+        PDFJS.externalLinkTarget = linkTarget;
+
+        expect(isExternalLinkTargetSet()).toEqual(false);
+      }
+    });
+
+    // Reset the state.
+    PDFJS.externalLinkTarget = previousExternalLinkTarget;
+  });
+});