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# Testing the Parser and Emitter
There are several programs to test the parser and emitter.
## Parser
echo 'foo: bar' | ./tests/run-parser-test-suite
This will output the parsing events in yaml-test-suite format:
+STR
+DOC
+MAP
=VAL :foo
=VAL :bar
-MAP
-DOC
-STR
For flow style events, you have to enable it with the `--flow` option:
echo '{ foo: bar }' | ./tests/run-parser-test-suite --flow keep
...
+MAP {}
...
In the future, this will be the default.
You can also explicitly disable this style with `--flow off`, or output
flow style always, with `--flow on`.
## Emitter
run-emitter-test-suite takes yaml-test-suite event format and emits YAML.
./tests/run-parser-test-suite ... | ./tests/run-emitter-test-suite
## Options
* `--directive (1.1|1.2)`
Prints a version directive before every document.
* `--flow on`
Will emit the whole document in flow style.
* `--flow off`
Will emit the whole document in block style.
* `--flow keep`
Will emit block/flow style like in the original document.
Example:
```
% echo 'foo: [bar, {x: y}]' |
./tests/run-parser-test-suite --flow keep |
./tests/run-emitter-test-suite --flow keep
foo: [bar, {x: y}]
```
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