Add huxley screenshot tests

Summary:
Add in a testing page, which just renders the location hash in the body. Use
this to make some screenshot tests in huxley. Note, these screenshots were made
in Firefox on a Linux computer, so running the tests somewhere else might
produce something else.

Test Plan:
- Serve KaTeX (`make serve`)
- Run a Selenium Server (I used selenium 2.40.0)
- Run `huxley` from the test/huxley/ directory
- Ensure that all of the tests pass

Reviewers: alpert

Reviewed By: alpert

Differential Revision: http://phabricator.khanacademy.org/D7258

.gitignore

@@ -1,2 +1,3 @@
 build
 node_modules
+last.png

test/huxley/Baseline.huxley/record.json

@@ -0,0 +1 @@
+{"py/object": "huxley.run.Test", "screen_size": {"py/tuple": [1024, 768]}, "steps": [{"py/object": "huxley.steps.ScreenshotTestStep", "index": 0, "offset_time": 0}]}

test/huxley/BasicTest.huxley/record.json

@@ -0,0 +1 @@
+{"py/object": "huxley.run.Test", "screen_size": {"py/tuple": [1024, 768]}, "steps": [{"py/object": "huxley.steps.ScreenshotTestStep", "index": 0, "offset_time": 0}]}

test/huxley/Colors.huxley/record.json

@@ -0,0 +1 @@
+{"py/object": "huxley.run.Test", "screen_size": {"py/tuple": [1024, 768]}, "steps": [{"py/object": "huxley.steps.ScreenshotTestStep", "index": 0, "offset_time": 0}]}

test/huxley/Exponents.huxley/record.json

@@ -0,0 +1 @@
+{"py/object": "huxley.run.Test", "screen_size": {"py/tuple": [1024, 768]}, "steps": [{"py/object": "huxley.steps.ScreenshotTestStep", "index": 0, "offset_time": 0}]}

test/huxley/FractionTest.huxley/record.json

@@ -0,0 +1 @@
+{"py/object": "huxley.run.Test", "screen_size": {"py/tuple": [1024, 768]}, "steps": [{"py/object": "huxley.steps.ScreenshotTestStep", "index": 0, "offset_time": 0}]}

test/huxley/Functions.huxley/record.json

@@ -0,0 +1 @@
+{"py/object": "huxley.run.Test", "screen_size": {"py/tuple": [1024, 768]}, "steps": [{"py/object": "huxley.steps.ScreenshotTestStep", "index": 0, "offset_time": 0}]}

test/huxley/GreekLetters.huxley/record.json

@@ -0,0 +1 @@
+{"py/object": "huxley.run.Test", "screen_size": {"py/tuple": [1024, 768]}, "steps": [{"py/object": "huxley.steps.ScreenshotTestStep", "index": 0, "offset_time": 0}]}

test/huxley/Huxleyfile

@@ -0,0 +1,32 @@
+[BasicTest]
+url=http://localhost:7936/test/huxley/test.html#a
+
+[FractionTest]
+url=http://localhost:7936/test/huxley/test.html#\dfrac{a}{b}\frac{a}{b}\tfrac{a}{b}
+
+[NestedFractions]
+url=http://localhost:7936/test/huxley/test.html#\dfrac{\frac{a}{b}}{\frac{c}{d}}\dfrac{\dfrac{a}{b}}{\dfrac{c}{d}}\frac{\frac{a}{b}}{\frac{c}{d}}
+
+[Exponents]
+url=http://localhost:7936/test/huxley/test.html#a^{a^a_a}_{a^a_a}
+
+[Colors]
+url=http://localhost:7936/test/huxley/test.html#\blue{a}\green{b}\red{c}
+
+[GreekLetters]
+url=http://localhost:7936/test/huxley/test.html#\alpha\beta\gamma\omega
+
+[Baseline]
+url=http://localhost:7936/test/huxley/test.html#a+b-c\cdot d/e
+
+[Spacing]
+url=http://localhost:7936/test/huxley/test.html#[-1][1-1]1=1(=1)\lvert a\rvert
+
+[Functions]
+url=http://localhost:7936/test/huxley/test.html#\sin\cos\tan\ln\log
+
+[Lap]
+url=http://localhost:7936/test/huxley/test.html#ab\llap{f}cd\rlap{g}h
+
+[KaTeX]
+url=http://localhost:7936/test/huxley/test.html#\KaTeX

test/huxley/KaTeX.huxley/record.json

@@ -0,0 +1 @@
+{"py/object": "huxley.run.Test", "screen_size": {"py/tuple": [1024, 768]}, "steps": [{"py/object": "huxley.steps.ScreenshotTestStep", "index": 0, "offset_time": 0}]}

test/huxley/Lap.huxley/record.json

@@ -0,0 +1 @@
+{"py/object": "huxley.run.Test", "screen_size": {"py/tuple": [1024, 768]}, "steps": [{"py/object": "huxley.steps.ScreenshotTestStep", "index": 0, "offset_time": 0}]}

test/huxley/NestedFractions.huxley/record.json

@@ -0,0 +1 @@
+{"py/object": "huxley.run.Test", "screen_size": {"py/tuple": [1024, 768]}, "steps": [{"py/object": "huxley.steps.ScreenshotTestStep", "index": 0, "offset_time": 0}]}

test/huxley/Spacing.huxley/record.json

@@ -0,0 +1 @@
+{"py/object": "huxley.run.Test", "screen_size": {"py/tuple": [1024, 768]}, "steps": [{"py/object": "huxley.steps.ScreenshotTestStep", "index": 0, "offset_time": 0}]}

test/huxley/test.html

@@ -0,0 +1,22 @@
+<!doctype html>
+<html>
+  <head>
+    <title>Huxley test</title>
+    <script src="/katex.js" type="text/javascript"></script>
+    <link href="/fonts/fonts.css" rel="stylesheet" type="text/css">
+    <link href="/katex.less.css" rel="stylesheet" type="text/css">
+    <style type="text/css">
+      #math {
+        font-size: 4em;
+      }
+    </style>
+  </head>
+  <body>
+    <div id="math"></div>
+    <script type="text/javascript">
+      var hash = window.location.hash.slice(1);
+      var mathNode = document.getElementById("math");
+      katex.process(hash, mathNode);
+    </script>
+  </body>
+</html>