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patch 7.4.1092

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Problem:    It is not simple to test for an exception and give a proper error
            message.
Solution:   Add assert_exception().
This commit is contained in:
Bram Moolenaar
2016-01-15 15:31:39 +01:00
parent b01f357791
commit a803c7f940
3 changed files with 56 additions and 9 deletions
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32
runtime/doc/eval.txt
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@@ -1750,9 +1750,10 @@ arglistid( [{winnr} [, {tabnr}]])
Number argument list id
argv( {nr}) String {nr} entry of the argument list
argv( ) List the argument list
assert_equal( {exp}, {act} [, {msg}]) none assert that {exp} equals {act}
assert_false( {actual} [, {msg}]) none assert that {actual} is false
assert_true( {actual} [, {msg}]) none assert that {actual} is true
assert_equal( {exp}, {act} [, {msg}]) none assert {exp} equals {act}
assert_exception({error} [, {msg}]) none assert {error} is in v:exception
assert_false( {actual} [, {msg}]) none assert {actual} is false
assert_true( {actual} [, {msg}]) none assert {actual} is true
asin( {expr}) Float arc sine of {expr}
atan( {expr}) Float arc tangent of {expr}
atan2( {expr}, {expr}) Float arc tangent of {expr1} / {expr2}
@@ -2179,7 +2180,7 @@ argv([{nr}]) The result is the {nr}th file in the argument list of the
returned.
*assert_equal()*
assert_equal({expected}, {actual}, [, {msg}])
assert_equal({expected}, {actual} [, {msg}])
When {expected} and {actual} are not equal an error message is
added to |v:errors|.
There is no automatic conversion, the String "4" is different
@@ -2193,18 +2194,31 @@ assert_equal({expected}, {actual}, [, {msg}])
< Will result in a string to be added to |v:errors|:
test.vim line 12: Expected 'foo' but got 'bar' ~
assert_false({actual}, [, {msg}]) *assert_false()*
assert_exception({error} [, {msg}]) *assert_exception()*
When v:exception does not contain the string {error} an error
message is added to |v:errors|.
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_false({actual} [, {msg}]) *assert_false()*
When {actual} is not false an error message is added to
|v:errors|, like with |assert_equal()|..
|v:errors|, like with |assert_equal()|.
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.
assert_true({actual}, [, {msg}]) *assert_true()*
assert_true({actual} [, {msg}]) *assert_true()*
When {actual} is not true an error message is added to
|v:errors|, like with |assert_equal()|..
A value is true when it is a non-zeron number. When {actual}
|v:errors|, like with |assert_equal()|.
A value is true when it is a non-zero number. When {actual}
is not a number the assert fails.
When {msg} is omitted an error in the form "Expected True but
got {actual}" is produced.