[WIP] Regression image tests #155
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We were using `await` on the compression stream but this meant that somtimes the rest of the HTML document was being loaded before the resources had been inflated. Now, we decompress in a blocking manner by manually pumping the promise so that we eliminate all the async.
The HTML has changed as we've edited the jsinflate file
…ssions The empty test is causing problems when trying to render images as wkhtmltox is refusing to render an empty image.
Our current regression suite checks that the rendered HTML doesn't change. However, sometimes we want to change the HTML (and so will bless the output), but don't expect the rendered _image_ to change. This test makes sure that we are aware of any pixel changes in the image output of pybloqs. Note: This makes the regression testing now _very_ sensitive, particularly to third party changes. We will need to freeze all the versions of our dependencies that we use in order for this to not become unnecessarily noisy.
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