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tests: Add VIR_TEST_REGENERATE_OUTPUT

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If this enviroment variable is set, the virTestCompareToFile helper
will overwrite the file content we are comparing against, if the
file doesn't exist or it doesn't match the expected input.

This is useful when adding new test cases, or making changes that
generate a lot of output churn.
This commit is contained in:
Cole Robinson 2015-04-23 14:02:57 -04:00
parent ca32929908
commit edb27a7048
3 changed files with 46 additions and 18 deletions
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7
HACKING
View File

@ -136,6 +136,13 @@ Also, individual tests can be run from inside the "tests/" directory, like:
./qemuxml2xmltest
If you are adding new test cases, or making changes that alter existing test
output, you can use the environment variable VIR_TEST_REGENERATE_OUTPUT to
quickly update the saved test data. Of course you still need to review the
changes VERY CAREFULLY to ensure they are correct.
VIR_TEST_REGENERATE_OUTPUT=1 ./qemuxml2argvtest
There is also a "./run" script at the top level, to make it easier to run
programs that have not yet been installed, as well as to wrap invocations of
various tests under gdb or Valgrind.

12
docs/hacking.html.in
View File

@ -164,6 +164,18 @@
<pre>
./qemuxml2xmltest
</pre>
<p>
If you are adding new test cases, or making changes that alter
existing test output, you can use the environment variable
VIR_TEST_REGENERATE_OUTPUT to quickly update the saved test data.
Of course you still need to review the changes VERY CAREFULLY to
ensure they are correct.
</p>
<pre>
VIR_TEST_REGENERATE_OUTPUT=1 ./qemuxml2argvtest
</pre>
<p>There is also a <code>./run</code> script at the top level,
to make it easier to run programs that have not yet been
installed, as well as to wrap invocations of various tests

45
tests/testutils.c
View File

@ -91,6 +91,21 @@ bool virtTestOOMActive(void)
return testOOMActive;
}
static unsigned int
virTestGetFlag(const char *name)
{
char *flagStr;
unsigned int flag;
if ((flagStr = getenv(name)) == NULL)
return 0;
if (virStrToLong_ui(flagStr, NULL, 10, &flag) < 0)
return 0;
return flag;
}
#ifdef TEST_OOM_TRACE
static void virTestAllocHook(int nalloc ATTRIBUTE_UNUSED,
void *opaque ATTRIBUTE_UNUSED)
@ -607,21 +622,30 @@ virtTestCompareToFile(const char *strcontent,
int ret = -1;
char *filecontent = NULL;
char *fixedcontent = NULL;
bool regenerate = !!virTestGetFlag("VIR_TEST_REGENERATE_OUTPUT");
if (virtTestLoadFile(filename, &filecontent) < 0)
if (virtTestLoadFile(filename, &filecontent) < 0 && !regenerate)
goto failure;
if (filecontent[strlen(filecontent) - 1] == '\n' &&
if (filecontent &&
filecontent[strlen(filecontent) - 1] == '\n' &&
strcontent[strlen(strcontent) - 1] != '\n') {
if (virAsprintf(&fixedcontent, "%s\n", strcontent) < 0)
goto failure;
}
if (STRNEQ(fixedcontent ? fixedcontent : strcontent, filecontent)) {
if (STRNEQ_NULLABLE(fixedcontent ? fixedcontent : strcontent,
filecontent)) {
if (regenerate) {
if (virFileWriteStr(filename, strcontent, 0666) < 0)
goto failure;
goto out;
}
virtTestDifference(stderr, strcontent, filecontent);
goto failure;
}
out:
ret = 0;
failure:
VIR_FREE(fixedcontent);
@ -692,21 +716,6 @@ virtTestLogContentAndReset(void)
}
static unsigned int
virTestGetFlag(const char *name)
{
char *flagStr;
unsigned int flag;
if ((flagStr = getenv(name)) == NULL)
return 0;
if (virStrToLong_ui(flagStr, NULL, 10, &flag) < 0)
return 0;
return flag;
}
unsigned int
virTestGetDebug(void)
{