Mercurial > genshi > genshi-test
changeset 509:1997f7af845c
Add a test for buffer reset by copy().
| author | athomas |
|---|---|
| date | Wed, 06 Jun 2007 10:07:47 +0000 |
| parents | cabd80e75dad |
| children | ca7d707d51b0 |
| files | genshi/filters/transform.py |
| diffstat | 1 files changed, 19 insertions(+), 4 deletions(-) [+] |
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--- a/genshi/filters/transform.py +++ b/genshi/filters/transform.py @@ -419,10 +419,25 @@ >>> buffer = StreamBuffer() >>> html = HTML('<html><head><title>Some Title</title></head>' ... '<body>Some <em>body</em> text.</body></html>') - >>> print html | Transformer('.//title/text()').copy(buffer) \\ - ... .select('.//body').prepend(tag.h1(buffer)) - <html><head><title>Some Title</title></head><body><h1>Some Title</h1>Some - <em>body</em> text.</body></html> + >>> print html | Transformer('title/text()').copy(buffer) \\ + ... .select('body').prepend(tag.h1(buffer)) + <html><head><title>Some Title</title></head><body><h1>Some + Title</h1>Some <em>body</em> text.</body></html> + + To ensure that a transformation can be reused deterministically, the + contents of ``buffer`` is replaced by the ``copy()`` operation: + + >>> print buffer + Some Title + >>> print html | Transformer('head/title/text()').copy(buffer) \\ + ... .select('body/em').copy(buffer).select('body') \\ + ... .prepend(tag.h1(buffer)) + <html><head><title>Some + Title</title></head><body><h1><em>body</em></h1>Some <em>body</em> + text.</body></html> + >>> print buffer + <em>body</em> + :param buffer: the `StreamBuffer` in which the selection should be stored