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node_modules/mark.js/test/specs/ranges/overlap.js

@@ -0,0 +1,27 @@
+'use strict';
+describe('mark ranges ignoring overlapping values', function() {
+  var $ctx;
+  beforeEach(function(done) {
+    loadFixtures('ranges/overlap.html');
+
+    $ctx = $('.ranges-overlap');
+    new Mark($ctx[0]).markRanges([
+      { start: 0, length: 30 },
+      { start: 25, length: 1 },
+      { start: 40, length: 10 },
+      { start: 45, length: 1 }
+    ], {
+      'each': function(node, range) {
+        $(node).attr('data-range-start', range.start);
+      },
+      'done': done
+    });
+  });
+
+  it('should ignore overlapping ranges', function() {
+    // length = 3 because whitespace before the <p> is wrapped
+    expect($ctx.find('mark')).toHaveLength(3);
+    expect($ctx.find('mark[data-range-start=25]')).toHaveLength(0);
+    expect($ctx.find('mark[data-range-start=45]')).toHaveLength(0);
+  });
+});