improve #linkPrev and #linkNext:

- add support for <link> elements
- match if there's more than one rel e.g. <a rel="nofollow next">...</a>
- more tests

1 files changed, 119 insertions, 37 deletions

diff --git a/test/content/navigates.test.js b/test/content/navigates.test.js
index b5144e9..d8a3316 100644
--- a/test/content/navigates.test.js
+++ b/test/content/navigates.test.js
@@ -1,56 +1,138 @@
-import { expect } from "chai";
+import { expect } from 'chai';
 import * as navigates from 'content/navigates';
 
+const testRel = (done, rel, html) => {
+  const method = rel === 'prev' ? 'linkPrev' : 'linkNext';
+  document.body.innerHTML = html;
+  navigates[method](window);
+  setTimeout(() => {
+    expect(document.location.hash).to.equal(`#${rel}`);
+    done();
+  }, 0);
+};
+
+const testPrev = html => done => testRel(done, 'prev', html);
+const testNext = html => done => testRel(done, 'next', html);
+
 describe('navigates module', () => {
   describe('#linkPrev', () => {
-    it('clicks prev link by text content', (done) => {
-      document.body.innerHTML = '<a href="#dummy">xprevx</a>  <a href="#prev">go to prev</a>';
-      navigates.linkPrev(window);
-      setTimeout(() => {
-        expect(document.location.hash).to.equal('#prev');
-        done();
-      }, 0);
-    });
+    it('navigates to <link> elements whose rel attribute is "prev"', testPrev(
+      '<link rel="prev" href="#prev" />'
+    ));
 
-    it('clicks a[rel=prev] element preferentially', (done) => {
-      document.body.innerHTML = '<a href="#dummy">prev</a>  <a rel="prev" href="#prev">rel</a>';
-      navigates.linkPrev(window);
-      setTimeout(() => {
-        expect(document.location.hash).to.equal('#prev');
-        done();
-      }, 0);
-    });
-  });
+    it('navigates to <link> elements whose rel attribute starts with "prev"', testPrev(
+      '<link rel="prev bar" href="#prev" />'
+    ));
+
+    it('navigates to <link> elements whose rel attribute ends with "prev"', testPrev(
+      '<link rel="foo prev" href="#prev" />'
+    ));
+
+    it('navigates to <link> elements whose rel attribute contains "prev"', testPrev(
+      '<link rel="foo prev bar" href="#prev" />'
+    ));
+
+    it('navigates to <a> elements whose rel attribute is "prev"', testPrev(
+      '<a rel="prev" href="#prev">click me</a>'
+    ));
+
+    it('navigates to <a> elements whose rel attribute starts with "prev"', testPrev(
+      '<a rel="prev bar" href="#prev">click me</a>'
+    ));
+
+    it('navigates to <a> elements whose rel attribute ends with "prev"', testPrev(
+      '<a rel="foo prev" href="#prev">click me</a>'
+    ));
+
+    it('navigates to <a> elements whose rel attribute contains "prev"', testPrev(
+      '<a rel="foo prev bar" href="#prev">click me</a>'
+    ));
+
+    it('navigates to <a> elements whose text matches "prev"', testPrev(
+      '<a href="#dummy">preview</a><a href="#prev">go to prev</a>'
+    ));
+
+    it('navigates to <a> elements whose text matches "previous"', testPrev(
+      '<a href="#dummy">preview</a><a href="#prev">go to previous</a>'
+    ));
+
+    it('navigates to <a> elements whose decoded text matches "<<"', testPrev(
+      '<a href="#dummy">click me</a><a href="#prev">&lt;&lt;</a>'
+    ));
+
+    it('navigates to matching <a> elements by clicking', testPrev(
+      `<a rel="prev" href="#dummy" onclick="return location = '#prev', false">go to prev</a>`
+    ));
+
+    it('prefers link[rel~=prev] to a[rel~=prev]', testPrev(
+      '<a rel="prev" href="#dummy">click me</a><link rel="prev" href="#prev" />'
+    ));
 
+    it('prefers a[rel~=prev] to a::text(pattern)', testPrev(
+      '<a href="#dummy">go to prev</a><a rel="prev" href="#prev">click me</a>'
+    ));
+  });
 
   describe('#linkNext', () => {
-    it('clicks next link by text content', (done) => {
-      document.body.innerHTML = '<a href="#dummy">xnextx</a>  <a href="#next">go to next</a>';
-      navigates.linkNext(window);
-      setTimeout(() => {
-        expect(document.location.hash).to.equal('#next');
-        done();
-      }, 0);
-    });
+    it('navigates to <link> elements whose rel attribute is "next"', testNext(
+      '<link rel="next" href="#next" />'
+    ));
 
-    it('clicks a[rel=next] element preferentially', (done) => {
-      document.body.innerHTML = '<a href="#dummy">next</a>  <a rel="next" href="#next">rel</a>';
-      navigates.linkNext(window);
-      setTimeout(() => {
-        expect(document.location.hash).to.equal('#next');
-        done();
-      }, 0);
-    });
+    it('navigates to <link> elements whose rel attribute starts with "next"', testNext(
+      '<link rel="next bar" href="#next" />'
+    ));
+
+    it('navigates to <link> elements whose rel attribute ends with "next"', testNext(
+      '<link rel="foo next" href="#next" />'
+    ));
+
+    it('navigates to <link> elements whose rel attribute contains "next"', testNext(
+      '<link rel="foo next bar" href="#next" />'
+    ));
+
+    it('navigates to <a> elements whose rel attribute is "next"', testNext(
+      '<a rel="next" href="#next">click me</a>'
+    ));
+
+    it('navigates to <a> elements whose rel attribute starts with "next"', testNext(
+      '<a rel="next bar" href="#next">click me</a>'
+    ));
+
+    it('navigates to <a> elements whose rel attribute ends with "next"', testNext(
+      '<a rel="foo next" href="#next">click me</a>'
+    ));
+
+    it('navigates to <a> elements whose rel attribute contains "next"', testNext(
+      '<a rel="foo next bar" href="#next">click me</a>'
+    ));
+
+    it('navigates to <a> elements whose text matches "next"', testNext(
+      '<a href="#dummy">inextricable</a><a href="#next">go to next</a>'
+    ));
+
+    it('navigates to <a> elements whose decoded text matches ">>"', testNext(
+      '<a href="#dummy">click me</a><a href="#next">&gt;&gt;</a>'
+    ));
+
+    it('navigates to matching <a> elements by clicking', testNext(
+      `<a rel="next" href="#dummy" onclick="return location = '#next', false">go to next</a>`
+    ));
+
+    it('prefers link[rel~=next] to a[rel~=next]', testNext(
+      '<a rel="next" href="#dummy">click me<><link rel="next" href="#next" />'
+    ));
+
+    it('prefers a[rel~=next] to a::text(pattern)', testNext(
+      '<a href="#dummy">go to next</a><a rel="next" href="#next">click me</a>'
+    ));
   });
 
   describe('#parent', () => {
     // NOTE: not able to test location
     it('removes hash', () => {
-      window.location.hash = "#section-1";
+      window.location.hash = '#section-1';
       navigates.parent(window);
       expect(document.location.hash).to.be.empty;
     });
   });
 });
-
-