Mercurial > hg > mercurial-crew-with-dirclash
annotate tests/README @ 2989:78fe7e2c2e1e
mercurial.el: add hg-cwd
author | Bryan O'Sullivan <bos@serpentine.com> |
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date | Tue, 22 Aug 2006 14:03:10 -0700 |
parents | f63667f694de |
children | 096f1c73cdc3 |
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331 | 1 A simple testing framework |
2 | |
332 | 3 To run the tests, do: |
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5 cd tests/ | |
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6 python run-tests.py |
332 | 7 |
331 | 8 This finds all scripts in the test directory named test-* and executes |
9 them. The scripts can be either shell scripts or Python. Each test is | |
10 run in a temporary directory that is removed when the test is complete. | |
11 | |
12 A test-<x> succeeds if the script returns success and its output | |
13 matches test-<x>.out. If the new output doesn't match, it is stored in | |
14 test-<x>.err. | |
15 | |
16 There are some tricky points here that you should be aware of when | |
17 writing tests: | |
18 | |
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19 - hg commit and hg merge want user interaction |
331 | 20 |
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21 for commit use -m "text" |
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22 for hg merge, set HGMERGE to something noninteractive (like true or merge) |
331 | 23 |
24 - changeset hashes will change based on user and date which make | |
25 things like hg history output change | |
26 | |
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27 use commit -m "test" -u test -d "1000000 0" |
331 | 28 |
29 - diff will show the current time | |
30 | |
2935 | 31 use hg diff | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \ |
32 -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/" | |
33 to strip dates | |
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34 |
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35 - You can append your own hgrc settings to the file that the environment |
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36 variable HGRCPATH points to. This file is cleared before running a test. |
2977 | 37 |
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38 You also need to be careful that the tests are portable from one platform |
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39 to another. You're probably working on Linux, where the GNU toolchain has |
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40 more (or different) functionality than on MacOS, *BSD, Solaris, AIX, etc. |
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41 While testing on all platforms is the only sure-fire way to make sure that |
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42 you've written portable code, here's a list of problems that have been |
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43 found and fixed in the tests. Another, more comprehensive list may be |
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44 found in the GNU Autoconf manual, online here: |
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45 |
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46 http://www.gnu.org/software/autoconf/manual/html_node/Portable-Shell.html |
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47 |
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48 sh: |
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49 |
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50 The Bourne shell is a very basic shell. /bin/sh on Linux is typically |
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51 bash, which even in Bourne-shell mode has many features that Bourne shells |
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52 on other Unix systems don't have (and even on Linux /bin/sh isn't |
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53 guaranteed to be bash). You'll need to be careful about constructs that |
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54 seem ubiquitous, but are actually not available in the least common |
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55 denominator. While using another shell (ksh, bash explicitly, posix shell, |
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56 etc.) explicitly may seem like another option, these may not exist in a |
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57 portable location, and so are generally probably not a good idea. You may |
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58 find that rewriting the test in python will be easier. |
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59 |
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60 - don't use pushd/popd; save the output of "pwd" and use "cd" in place of |
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61 the pushd, and cd back to the saved pwd instead of popd. |
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62 |
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63 - don't use math expressions like let, (( ... )), or $(( ... )); use "expr" |
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64 instead. |
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65 |
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66 grep: |
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67 |
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68 - don't use the -q option; redirect stdout to /dev/null instead. |
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69 |
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70 - don't use extended regular expressions with grep; use egrep instead, and |
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71 don't escape any regex operators. |
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72 |
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73 sed: |
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74 |
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75 - make sure that the beginning-of-line matcher ("^") is at the very |
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76 beginning of the expression -- it may not be supported inside parens. |
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77 |
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78 echo: |
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79 |
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80 - echo may interpret "\n" and print a newline; use printf instead if you |
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81 want a literal "\n" (backslash + n). |
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82 |
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83 false: |
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84 |
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85 - false is guaranteed only to return a non-zero value; you cannot depend on |
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86 it being 1. On Solaris in particular, /bin/false returns 255. Rewrite |
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87 your test to not depend on a particular return value, or create a |
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88 temporary "false" executable, and call that instead. |
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89 |
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90 diff: |
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91 |
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92 - don't use the -N option. There's no particularly good workaround short |
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93 of writing a reasonably complicated replacement script, but substituting |
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94 gdiff for diff if you can't rewrite the test not to need -N will probably |
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95 do. |