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*testing.txt* Nvim
VIM REFERENCE MANUAL by Bram Moolenaar
Testing Vim and Vim script *testing-support*
Expression evaluation is explained in |eval.txt|. This file goes into details
about writing tests in Vim script. This can be used for testing Vim itself
and for testing plugins.
1. Testing Vim |testing|
2. Test functions |test-functions-details|
3. Assert functions |assert-functions-details|
==============================================================================
1. Testing Vim *testing*
Vim can be tested after building it, usually with "make test".
The tests are located in the directory "src/testdir".
*new-style-testing*
New tests should be added as new style tests. The test scripts are named
test_<feature>.vim (replace <feature> with the feature under test). These use
functions such as |assert_equal()| to keep the test commands and the expected
result in one place.
Find more information in the file src/testdir/README.txt.
==============================================================================
2. Test functions *test-functions-details*
test_garbagecollect_now() *test_garbagecollect_now()*
Like garbagecollect(), but executed right away. This must
only be called directly to avoid any structure to exist
internally, and |v:testing| must have been set before calling
any function.
==============================================================================
3. Assert functions *assert-functions-details*
assert_beeps({cmd}) *assert_beeps()*
Run {cmd} and add an error message to |v:errors| if it does
NOT produce a beep or visual bell.
Also see |assert_fails()|, |assert_nobeep()| and
|assert-return|.
Can also be used as a |method|: >
GetCmd()->assert_beeps()
<
*assert_equal()*
assert_equal({expected}, {actual} [, {msg}])
When {expected} and {actual} are not equal an error message is
added to |v:errors| and 1 is returned. Otherwise zero is
returned |assert-return|.
There is no automatic conversion, the String "4" is different
from the Number 4. And the number 4 is different from the
Float 4.0. The value of 'ignorecase' is not used here, case
always matters.
When {msg} is omitted an error in the form "Expected
{expected} but got {actual}" is produced.
Example: >
assert_equal('foo', 'bar')
< Will result in a string to be added to |v:errors|:
test.vim line 12: Expected 'foo' but got 'bar' ~
Can also be used as a |method|: >
mylist->assert_equal([1, 2, 3])
< *assert_equalfile()*
assert_equalfile({fname-one}, {fname-two})
When the files {fname-one} and {fname-two} do not contain
exactly the same text an error message is added to |v:errors|.
Also see |assert-return|.
When {fname-one} or {fname-two} does not exist the error will
mention that.
Can also be used as a |method|: >
GetLog()->assert_equalfile('expected.log')
assert_exception({error} [, {msg}]) *assert_exception()*
When v:exception does not contain the string {error} an error
message is added to |v:errors|. Also see |assert-return|.
This can be used to assert that a command throws an exception.
Using the error number, followed by a colon, avoids problems
with translations: >
try
commandthatfails
call assert_false(1, 'command should have failed')
catch
call assert_exception('E492:')
endtry
<
*assert_fails()*
assert_fails({cmd} [, {error} [, {msg} [, {lnum} [, {context}]]]])
Run {cmd} and add an error message to |v:errors| if it does
NOT produce an error or when {error} is not found in the
error message. Also see |assert-return|.
When {error} is a string it must be found literally in the
first reported error. Most often this will be the error code,
including the colon, e.g. "E123:". >
assert_fails('bad cmd', 'E987:')
<
When {error} is a |List| with one or two strings, these are
used as patterns. The first pattern is matched against the
first reported error: >
assert_fails('cmd', ['E987:.*expected bool'])
< The second pattern, if present, is matched against the last
reported error. To only match the last error use an empty
string for the first error: >
assert_fails('cmd', ['', 'E987:'])
<
If {msg} is empty then it is not used. Do this to get the
default message when passing the {lnum} argument.
When {lnum} is present and not negative, and the {error}
argument is present and matches, then this is compared with
the line number at which the error was reported. That can be
the line number in a function or in a script.
When {context} is present it is used as a pattern and matched
against the context (script name or function name) where
{lnum} is located in.
Note that beeping is not considered an error, and some failing
commands only beep. Use |assert_beeps()| for those.
Can also be used as a |method|: >
GetCmd()->assert_fails('E99:')
assert_false({actual} [, {msg}]) *assert_false()*
When {actual} is not false an error message is added to
|v:errors|, like with |assert_equal()|.
Also see |assert-return|.
A value is false when it is zero. When {actual} is not a
number the assert fails.
When {msg} is omitted an error in the form
"Expected False but got {actual}" is produced.
Can also be used as a |method|: >
GetResult()->assert_false()
assert_inrange({lower}, {upper}, {actual} [, {msg}]) *assert_inrange()*
This asserts number and |Float| values. When {actual} is lower
than {lower} or higher than {upper} an error message is added
to |v:errors|. Also see |assert-return|.
When {msg} is omitted an error in the form
"Expected range {lower} - {upper}, but got {actual}" is
produced.
*assert_match()*
assert_match({pattern}, {actual} [, {msg}])
When {pattern} does not match {actual} an error message is
added to |v:errors|. Also see |assert-return|.
{pattern} is used as with |expr-=~|: The matching is always done
like 'magic' was set and 'cpoptions' is empty, no matter what
the actual value of 'magic' or 'cpoptions' is.
{actual} is used as a string, automatic conversion applies.
Use "^" and "$" to match with the start and end of the text.
Use both to match the whole text.
When {msg} is omitted an error in the form
"Pattern {pattern} does not match {actual}" is produced.
Example: >
assert_match('^f.*o$', 'foobar')
< Will result in a string to be added to |v:errors|:
test.vim line 12: Pattern '^f.*o$' does not match 'foobar' ~
Can also be used as a |method|: >
getFile()->assert_match('foo.*')
<
assert_nobeep({cmd}) *assert_nobeep()*
Run {cmd} and add an error message to |v:errors| if it
produces a beep or visual bell.
Also see |assert_beeps()|.
Can also be used as a |method|: >
GetCmd()->assert_nobeep()
<
*assert_notequal()*
assert_notequal({expected}, {actual} [, {msg}])
The opposite of `assert_equal()`: add an error message to
|v:errors| when {expected} and {actual} are equal.
Also see |assert-return|.
Can also be used as a |method|: >
mylist->assert_notequal([1, 2, 3])
< *assert_notmatch()*
assert_notmatch({pattern}, {actual} [, {msg}])
The opposite of `assert_match()`: add an error message to
|v:errors| when {pattern} matches {actual}.
Also see |assert-return|.
Can also be used as a |method|: >
getFile()->assert_notmatch('bar.*')
assert_report({msg}) *assert_report()*
Report a test failure directly, using String {msg}.
Always returns one.
Can also be used as a |method|: >
GetMessage()->assert_report()
assert_true({actual} [, {msg}]) *assert_true()*
When {actual} is not true an error message is added to
|v:errors|, like with |assert_equal()|.
Also see |assert-return|.
A value is |TRUE| when it is a non-zero number or |v:true|.
When {actual} is not a number or |v:true| the assert fails.
When {msg} is omitted an error in the form "Expected True but
got {actual}" is produced.
Can also be used as a |method|: >
GetResult()->assert_true()
<
vim:tw=78:ts=8:noet:ft=help:norl:
|
