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Unified Diff: docs/layout_tests_linux.md

Issue 1324603002: [Docs] Another round of stylistic fixes. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 5 years, 4 months ago
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Index: docs/layout_tests_linux.md
diff --git a/docs/layout_tests_linux.md b/docs/layout_tests_linux.md
index c5d0be0aa1e5835ba2f5e32d66111f6daf87af50..154e33428bef85997b52c89a3355b1eacfee4cc9 100644
--- a/docs/layout_tests_linux.md
+++ b/docs/layout_tests_linux.md
@@ -1,21 +1,31 @@
# Running layout tests on Linux
- 1. Build `blink_tests` (see LinuxBuildInstructions)
- 1. Checkout the layout tests
- * If you have an entry in your .gclient file that includes "LayoutTests", you may need to comment it out and sync.
- * You can run a subset of the tests by passing in a path relative to `src/third_party/WebKit/LayoutTests/`. For example, `run_layout_tests.py fast` will only run the tests under `src/third_party/WebKit/LayoutTests/fast/`.
- 1. When the tests finish, any unexpected results should be displayed.
-
-See [Running WebKit Layout Tests](http://dev.chromium.org/developers/testing/webkit-layout-tests) for full documentation about set up and available options.
+1. Build `blink_tests` (see LinuxBuildInstructions)
+1. Checkout the layout tests
+ * If you have an entry in your `.gclient` file that includes
+ "LayoutTests", you may need to comment it out and sync.
+ * You can run a subset of the tests by passing in a path relative to
+ `src/third_party/WebKit/LayoutTests/`. For example,
+ `run_layout_tests.py fast` will only run the tests under
+ `src/third_party/WebKit/LayoutTests/fast/`.
+1. When the tests finish, any unexpected results should be displayed.
+
+See
+[Running WebKit Layout Tests](http://dev.chromium.org/developers/testing/webkit-layout-tests)
+for full documentation about set up and available options.
## Pixel Tests
-The pixel test results were generated on Ubuntu 10.4 (Lucid). If you're running a newer version of Ubuntu, you will get some pixel test failures due to changes in freetype or fonts. In this case, you can create a Lucid 64 chroot using `build/install-chroot.sh` to compile and run tests.
+The pixel test results were generated on Ubuntu 10.4 (Lucid). If you're running
+a newer version of Ubuntu, you will get some pixel test failures due to changes
+in freetype or fonts. In this case, you can create a Lucid 64 chroot using
+`build/install-chroot.sh` to compile and run tests.
## Fonts
Make sure you have all the necessary fonts installed.
-```
+
+```shell
sudo apt-get install apache2 wdiff php5-cgi ttf-indic-fonts \
msttcorefonts ttf-dejavu-core ttf-kochi-gothic ttf-kochi-mincho \
ttf-thai-tlwg
@@ -25,66 +35,104 @@ You can also just run `build/install-build-deps.sh` again.
## Plugins
-If `fast/dom/object-plugin-hides-properties.html` and `plugins/embed-attributes-style.html` are failing, try uninstalling `totem-mozilla` from your system:
-```
-sudo apt-get remove totem-mozilla
-```
+If `fast/dom/object-plugin-hides-properties.html` and
+`plugins/embed-attributes-style.html` are failing, try uninstalling
+`totem-mozilla` from your system:
+
+ sudo apt-get remove totem-mozilla
+
## Running layout tests under valgrind on Linux
As above, but use `tools/valgrind/chrome_tests.sh -t webkit` instead. e.g.
-```
-sh tools/valgrind/chrome_tests.sh -t webkit LayoutTests/fast/
-```
+
+ sh tools/valgrind/chrome_tests.sh -t webkit LayoutTests/fast/
+
This defaults to using --debug. Read the script for more details.
-If you're trying to reproduce a run from the valgrind buildbot, look for the --run\_chunk=XX:YY
-line in the bot's log. You can rerun exactly as the bot did with the commands
-```
+If you're trying to reproduce a run from the valgrind buildbot, look for the
+`--run_chunk=XX:YY` line in the bot's log. You can rerun exactly as the bot did
+with the commands.
+
+```shell
cd ~/chromium/src
-echo XX > valgrind_layout_chunk.txt
+echo XX > valgrind_layout_chunk.txt
sh tools/valgrind/chrome_tests.sh -t layout -n YY
```
+
That will run the XXth chunk of YY layout tests.
## Configuration tips
- * Use an optimized content\_shell when rebaselining or running a lot of tests. ([bug 8475](http://code.google.com/p/chromium/issues/detail?id=8475) is about how the debug output differs from the optimized output.) `ninja -C out/Release content_shell`
- * Make sure you have wdiff installed: `sudo apt-get install wdiff` to get prettier diff output
- * Some pixel tests may fail due to processor-specific rounding errors. Build using a chroot jail with Lucid 64-bit user space to be sure that your system matches the checked in baselines. You can use `build/install-chroot.sh` to set up a Lucid 64 chroot. Learn more about [UsingALinuxChroot](UsingALinuxChroot.md).
+
+* Use an optimized `content_shell` when rebaselining or running a lot of
+ tests. ([bug 8475](https://crbug.com/8475) is about how the debug output
+ differs from the optimized output.)
+
+ `ninja -C out/Release content_shell`
+
+* Make sure you have wdiff installed: `sudo apt-get install wdiff` to get
+ prettier diff output.
+* Some pixel tests may fail due to processor-specific rounding errors. Build
+ using a chroot jail with Lucid 64-bit user space to be sure that your system
+ matches the checked in baselines. You can use `build/install-chroot.sh` to
+ set up a Lucid 64 chroot. Learn more about
+ [using a linux chroot](using_a_linux_chroot.md).
+
## Getting a layout test into a debugger
There are two ways:
- 1. Run content\_shell directly rather than using run\_layout\_tests.py. You will need to pass some options:
- * `--no-timeout` to give you plenty of time to debug
- * the fully qualified path of the layout test (rather than relative to `WebKit/LayoutTests`).
- 1. Or, run as normal but with the `--additional-drt-flag=--renderer-startup-dialog --additional-drt-flag=--no-timeout --time-out-ms=86400000` flags. The first one makes content\_shell bring up a dialog before running, which then would let you attach to the process via `gdb -p PID_OF_DUMPRENDERTREE`. The others help avoid the test shell and DumpRenderTree timeouts during the debug session.
+
+1. Run `content_shell` directly rather than using `run_layout_tests.py`. You
+ will need to pass some options:
+ * `--no-timeout` to give you plenty of time to debug
+ * the fully qualified path of the layout test (rather than relative to
+ `WebKit/LayoutTests`).
+1. Or, run as normal but with the
+ `--additional-drt-flag=--renderer-startup-dialog
+ --additional-drt-flag=--no-timeout --time-out-ms=86400000` flags. The first
+ one makes content\_shell bring up a dialog before running, which then would
+ let you attach to the process via `gdb -p PID_OF_DUMPRENDERTREE`. The others
+ help avoid the test shell and DumpRenderTree timeouts during the debug
+ session.
## Using an embedded X server
-If you try to use your computer while the tests are running, you may get annoyed as windows are opened and closed automatically. To get around this, you can create a separate X server for running the tests.
+If you try to use your computer while the tests are running, you may get annoyed
+as windows are opened and closed automatically. To get around this, you can
+create a separate X server for running the tests.
+
+1. Install Xephyr (`sudo apt-get install xserver-xephyr`)
+1. Start Xephyr as display 4: `Xephyr :4 -screen 1024x768x24`
+1. Run the layout tests in the Xephyr: `DISPLAY=:4 run_layout_tests.py`
+
+Xephyr supports debugging repainting. See the
+[Xephyr README](http://cgit.freedesktop.org/xorg/xserver/tree/hw/kdrive/ephyr/README)
+for details. In brief:
- 1. Install Xephyr (`sudo apt-get install xserver-xephyr`)
- 1. Start Xephyr as display 4: `Xephyr :4 -screen 1024x768x24`
- 1. Run the layout tests in the Xephyr: `DISPLAY=:4 run_layout_tests.py`
+1. `XEPHYR_PAUSE=$((500*1000)) Xephyr ...etc... # 500 ms repaint flash`
+1. `kill -USR1 $(pidof Xephyr)`
-Xephyr supports debugging repainting. See the [Xephyr README](http://cgit.freedesktop.org/xorg/xserver/tree/hw/kdrive/ephyr/README) for details. In brief:
- 1. `XEPHYR_PAUSE=$((500*1000)) Xephyr ...etc... # 500 ms repaint flash`
- 1. `kill -USR1 $(pidof Xephyr)`
+If you don't want to see anything at all, you can use Xvfb (should already be
+installed).
-If you don't want to see anything at all, you can use Xvfb (should already be installed).
- 1. Start Xvfb as display 4: `Xvfb :4 -screen 0 1024x768x24`
- 1. Run the layout tests in the Xvfb: `DISPLAY=:4 run_layout_tests.py`
+1. Start Xvfb as display 4: `Xvfb :4 -screen 0 1024x768x24`
+1. Run the layout tests in the Xvfb: `DISPLAY=:4 run_layout_tests.py`
## Tiling Window managers
-The layout tests want to run with the window at a particular size down to the pixel level. This means if your window manager resizes the window it'll cause test failures. This is another good reason to use an embedded X server.
+The layout tests want to run with the window at a particular size down to the
+pixel level. This means if your window manager resizes the window it'll cause
+test failures. This is another good reason to use an embedded X server.
### xmonad
-In your `.xmonad/xmonad.hs`, change your config to include a manageHook along these lines:
+
+In your `.xmonad/xmonad.hs`, change your config to include a manageHook along
+these lines:
+
```
test_shell_manage = className =? "Test_shell" --> doFloat
main = xmonad $
defaultConfig
{ manageHook = test_shell_manage <+> manageHook defaultConfig
...
-```
+```
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