hspec
A Testing Framework for Haskell
Version on this page: | 2.11.8 |
LTS Haskell 22.33: | 2.11.9 |
Stackage Nightly 2024-09-07: | 2.11.9 |
Latest on Hackage: | 2.11.9 |
hspec-2.11.8@sha256:1e779f863c3ff0640319315c097b549c4493e293d2e23818c873064bf904f55d,1763
Module documentation for 2.11.8
Hspec is a testing framework for Haskell. Some of Hspec's distinctive features are:
a friendly DSL for defining tests
integration with QuickCheck, SmallCheck, and HUnit
parallel test execution
automatic discovery of test files
The Hspec Manual is at https://hspec.github.io/.
Changes
Changes in 2.11.8 (2024-04-22)
- Make the build pass with QuickCheck 2.15
Changes in 2.11.7 (2023-10-22)
- Include
--seed
in the note on how to rurun a failing item.
Changes in 2.11.6 (2023-10-11)
- Compatibility with GHC 9.8.1
- Run cleanup actions on
--fail-fast
(see #860)
Changes in 2.11.5 (2023-09-20)
- Add
--show-exceptions
and--display-exceptions
Changes in 2.11.4 (2023-07-20)
- Depend on
hspec-expectations-0.8.4
Changes in 2.11.3 (2023-07-10)
- Suppress informational output from QuickCheck when
Test.QuickCheck.Args.chatty
isFalse
(#840)
Changes in 2.11.2 (2023-07-06)
- Add
--expert
mode
Changes in 2.11.1 (2023-05-28)
- Depend on
hspec-expectations-0.8.3
Changes in 2.11.0.1 (2023-04-28)
- Don’t crash when home directories are unsupported (WASM/WASI) (thanks @amesgen)
Changes in 2.11.0 (2023-04-21)
- Drop support for GHC < 7.10.3
- Improve coloring of whitespace-only segments on
--diff
- Add
ColorizedReason
constructor toFailureReason
- Provide a new package
hspec-api
, a stable API that can be used to extend Hspec’s functionality. - Deprecate
Test.Hspec.Core.Formatters.V1
in favor ofTest.Hspec.Api.Formatters.V1
- Add
--fail-on=empty-description
- Print slow spec items to
stderr
instead ofstdout
- Handle quoting/escaping in
.hspec
files - Flush output handle after reporting progress on
-fprogress
Changes in 2.10.10 (2023-03-07)
- Re-export
sequential
fromTest.Hspec
- Rerun
beforeAll
/afterAll
on--rerun-all-on-success
(#768)
Changes in 2.10.9 (2023-01-13)
- Print error message on
-—fail-on=empty
- Only fail on
-—fail-on=empty
if at least one spec item has been filtered - Re-export more types from
Test.Hspec.Core.Runner
- Fix a pretty-printing bug where
[]
would be pretty-printed as""
- Don’t pretty-print if the expected and actual value would be equal after pretty-printing
- Prevent deadlocks on unguarded exceptions in runner (#771)
Changes in 2.10.8 (2022-12-19)
- Add pretty-printing support for rational numbers
- Force / evaluate exceptions recursively (#763)
- Add
xprop
andfprop
, which usexit
andfit
(thanks @lehins)
Changes in 2.10.7 (2022-12-03)
- Do not depend on
ghc
for pretty-printing (#750, #752)
Changes in 2.10.6 (2022-09-13)
- Suppress excessive diff output (#449)
- Allow the use of an external diff program. This can e.g. be used by
setting
HSPEC_DIFF_COMMAND="diff -u --color -L expected -L actual"
orHSPEC_DIFF_COMMAND="git diff"
- Do not imply
--fail-on=empty
on--strict
Changes in 2.10.5 (2022-09-09)
- Add
--fail-on
. This subsums--fail-on-focused
and--fail-on-pending
. - Add
--fail-on=empty
(#650) - Add
registerFormatter
andregisterDefaultFormatter
toTest.Hspec.Runner
. - Revert deprecation of
Test.Hspec.Formatters
andTest.Hspec.Core.Formatters
. Instead the module documentation now says that they are deprecated in favor ofTest.Hspec.Core.Formatters.V1
.
Changes in 2.10.4 (2022-09-06)
- Make sure that whitespace-only diff output is colorized properly (#660)
Changes in 2.10.3 (2022-09-05)
- Deprecate
Test.Hspec.Formatters
andTest.Hspec.Core.Formatters
- Disable (most) warnings in files generated by
hspec-discover
(#702)
Changes in 2.10.2 (2022-09-03)
- Add
--strict
- Add
--fail-on-pending
- Do not depend on
clock
Changes in 2.10.1 (2022-08-22)
- Support for GHC 9.4.1
- Generated modules now include an export list
Changes in 2.10.0.1 (2022-08-06)
- Fix a deadlock with nested failed
aroundAll
s (see #679)
Changes in 2.10.0 (2022-05-12)
- Allow to transform the config in
SpecM
- Allow to customize pretty-printing (via
configPrettyPrintFunction
) - Add
getSpecDescriptionPath
(#637, thanks @srid) - Do not treat
afterAll
as another spec item (fixes #414, #364, #363) - Change type of
paramsSmallCheckDepth
to Maybe (see #345)
Changes in 2.9.7
- Ensure that interim output does not interfere with output from tests This
facilitates using
print
when debugging test cases.
Changes in 2.9.6
- Ensure color codes don’t span newlines (#346, thanks @robx)
- Disable progress reporting on Buildkite
- Improve error messages on exceptions in hooks
Changes in 2.9.5
- Assume
--color
by default when running on GitHub Actions. UseHSPEC_COLOR=no
or--no-color
to opt out of this behavior. - Disable progress reporting on GitHub Actions.
- Retain source formatting of numbers when pretty-printing.
Changes in 2.9.4
- Compatibility with GHCJS (see #599)
Changes in 2.9.3
- Pretty-print Haskell values in failure messages
Changes in 2.9.2
- Show multi-line diffs for string literals (disable with
--no-pretty
)
Changes in 2.9.1
- Recover unicode from
ExpectedButGot
- Preserve unicode in
To rerun use: --match ...
output
Changes in 2.9.0
- Add ASCII fallbacks to “checks” formatter (fixes #512)
- Use
checks
formatter by default (to restore the old behavior use--format specdoc
) - Allow to extend the list of available formatters for
--format
(configAvailableFormatters
) - Add
getExpectedTotalCount
toTest.Hspec.Core.Formatters.V2
- Rename
formatConfigItemCount
toformatConfigExpectedTotalCount
- Rename
configFastFail
toconfigFailFast
Changes in 2.8.5
- hspec-core: Include help.txt in package tarball (close #568)
- hspec-discover: Require base >=4.5.0.0 (fixes #554)
Changes in 2.8.4
- Better support for GHC 9.2.1
- Support for setting options by individual environment variables, e.g.
HSPEC_COLOR=yes
will set--color
Changes in 2.8.3
- Better support for
--color=auto
on Windows - Add support for spec hooks to
hspec-discover
(viaSpecHook.hs
) - Propagate exceptions from
Test.Hspec.Core.Format.monadic
- Re-export
aroundAll_
fromTest.Hspec
Changes in 2.8.2
- Add
mapSubject
andignoreSubject
Changes in 2.8.1
- Take the environment variable
NO_COLOR
into account
Changes in 2.8.0
- Add
--times
to print times for individual spec items - Add
--print-slow-items
- Use
-XNoImplicitPrelude
and do not rely onbase
forhspec-discover
generated test drivers. This ensures full compatibility with custom preludes. - Add new APIs for formatters
Test.Hspec.Core.Format
andTest.Hspec.Core.Formatters.V2
- Add
getItemCount
toFormatter
API - Add
--qc-max-shrinks
(see #380) - Add location information for failing
afterAll
-hooks - hspec-discover: Deprecate
--no-main
and--formatter
(use--module-name
instead) (#196) - Remove
--verbose
option (this has been a noop since at least 2013) - Remove
--out
option (use shell output redirection instead)
Changes in 2.7.10
- Add a new formatter (can be used with
--format checks
) - Add
exampleStarted
toFormatter
API
Changes in 2.7.9
- Re-export
aroundAll
andaroundAllWith
fromTest.Hspec
Changes in 2.7.8
- Add
aroundAll
/aroundAllWith
(see #255)
Changes in 2.7.7
- Add
aroundAll_
(see #255) - Correctly handle pending for
afterAll
actions
Changes in 2.7.6
- Add
beforeAllWith
(see #447)
Changes in 2.7.5
- Extract source locations from
NoMethodError
andAssertionFailed
Changes in 2.7.4
- Apply
--randomize
recursively
Changes in 2.7.3
- Add
--randomize
Changes in 2.7.2
- Interrupt diff calculation if it takes longer than two seconds (see #415)
Changes in 2.7.1
- Add compatibility with QuickCheck 2.13.1 (see #410)
Changes in 2.7.0
- Add
--focused-only
(see #390) - Add
--fail-on-focused
(see #389)
Changes in 2.6.1
- Add
Test.Hspec.Runner.runSpec
(see #216)
Changes in 2.6.0
- Allow to focus individual spec items (see #319)
- Do not calculate diff on
--no-diff
(see #332) - Remove deprecated module Test.Hspec.Core
Changes in 2.5.9
- Extract source locations from RecConError (see #375)
Changes in 2.5.8
- Add
modifyArgs
andmodifyMaxShrinks
toTest.Hspec.QuickCheck
(see #380)
Changes in 2.5.7
- GHC 8.6.1 related changes
Changes in 2.5.6
- Compatibility with
QuickCheck-2.12
Changes in 2.5.5
- Use
module[line:column]
instead ofmodule:line:column
as default label fordescribe
/it
(fixes #366)
Changes in 2.5.4
- Show how to rerun individual spec items on test failures (see #205)
Changes in 2.5.3
- Treat character escapes like
\NUL
as single tokens on--diff
(see #351) - Allow a
/
at the beginning and at the end of an absolute path that is passed to--match
or--skip
Changes in 2.5.2
- Use module:line:column as default label for describe/it (see #250)
- Warn if user is affected by https://ghc.haskell.org/trac/ghc/ticket/13285 (see #329)
Changes in 2.5.1
- Disable tests for Test.Hspec.Core.Timer (see #352)
Changes in 2.5.0
- Add
sequential
(see #311) - Add support for
--diff
whenshouldBe
is uesd withQuickCheck
-properties - Add source locations when
shouldBe
is uesd withQuickCheck
properties - Print
QuickCheck
labels on success (see #297) - Retain output of
verbose
,label
,collect
,classify
, etc. forQuickCheck
properties (see #257) - Extract source location from error / undefined (see #316)
- Parse source locations from pattern match failures
- Include source column when formatting source locations
- Colorize whitespaces with background color instead of foreground color with
--diff
- Run
Test.Hspec.Core.Formatters.exampleProgress
inFormatM
instead ofIO
- Make sure that progress output is always cleared (fixes #301)
- Add location information to
pending
(not used by any formatter yet) - Include duration for each spec item in new formatter API (see #315) (not yet exposed)
- Removed deprecated module
Test.Hspec.HUnit
, useTest.Hspec.Contrib.HUnit
instead - Deprecate
--out
- Remove
BestEffort
source locations
Changes in 2.4.8
- compatibility with GHC 8.4.1-alpha3
Changes in 2.4.7
- compatibility with
QuickCheck-2.11.3
and up (note thatQuickCheck
versions2.11
to2.11.2
are not fully supported)
Changes in 2.4.6
- compatibility with the upcoming version
4.11.0.0
ofbase
Changes in 2.4.5
hspec-discover
: Sort specs using natural sort order
Changes in 2.4.4
- Require quickcheck-io >= 0.2.0
Changes in 2.4.3
- Read command-line options from environment variable
HSPEC_OPTIONS
Changes in 2.4.2
- Use
--diff
by default - Add
--failure-report
(see #266)
Changes in 2.4.1
- Compatibility with HUnit < 1.3
Changes in 2.4.0
- Read command-line options from config files
~/.hspec
and.hspec
- Add support for
--diff
- Add
xit
,xspecify
,xdescribe
andxcontext
(see #252) - Add
--rerun-all-on-success
- Report exceptions in
beforeAll
operations only once - Add indentation when actual/expected contain newlines (see #263)
- More graceful shutdown on ctrl-c (see #270)
- Run around-hook for Bool and Result (see #252)
- Include
CHANGES.markdown
in package tarball
Internal changes:
- Rename
Fail
constructor ofResult
-type toFailure
- Add
FailureReason
type - Add
Test.Hspec.Core.Spec.safeEvaluateExample
Changes in 2.3.2
- Compatibility with HUnit 1.5
Changes in 2.3.1
- Fix build for HUnit < 1.4
Changes in 2.3.0
- Proper support for GHC 8 call stacks
Changes in 2.2.4
- Compatibility with QuickCheck-2.9
Changes in 2.2.3
- Make sure that
cabal haddock
works forhspec-discover
- Forward compatibility for HUnit 1.4
- Fix tests for GHC 8.0.1-rc1
Changes in 2.2.2
- Fix compilation for GHC 8.0.1-rc1
Changes in 2.2.1
- Make sure that Vim’s default
errorformat
recognizes exact locations - GHCJS compatibility
Changes in 2.2.0
- Add source locations to test
Result
Changes in 2.1.10
- GHC 7.0.* compatibility
Changes in 2.1.9
- Make use of GHC 7.10.2 source locations
- Add
--jobs
Changes in 2.1.8
- Depend on `hspec-expectations-0.7.0”
Changes in 2.1.7
- Add
beforeAll_
Changes in 2.1.6
- If there were no previous failures, run all spec items on
--rerun
Changes in 2.1.5
- Compatibility with QuickCheck-2.8
Changes in 2.1.4
- Make
hspec-discover
ignore modules with invalid module names, this fixes issues withflycheck
’s temporary files
Changes in 2.1.3
- Format source locations like gcc does
Changes in 2.1.2
- Re-export
before_
fromTest.Hspec
Changes in 2.1.1
- Add
before_
- Add command-line option
--skip
Changes in 2.1.0
- Generalize
after_
,afterAll_
andaround_
Changes in 2.0.2
- Indent error messages for failed examples (fixes #186)
- Export
defaultParams
fromTest.Hspec.Core.Example
- Bring back
Test.Hspec.HUnit
and deprecate it to provide a smother upgrade path
Changes in 2.0.1
- Add missing extra source files to for
hspec-discover
Changes in 2.0.0
- Split package into
hspec
,hspec-core
andhspec-discover
- Allow hooks (
before
,around
, etc.) to pass arguments to spec items - Do not print
-
in front of spec items withspecdoc
formatter - Move
Test.Hspec.HUnit
tohspec-contrib
Changes in 1.12.4
- Add
specGroup
andspecItem
toTest.Hspec.Core
- Deprecate
Test.Hspec.Core.it
andTest.Hspec.Core.describe
Changes in 1.12.3
- Make
hspec-discover
work with-XNoImplicitPrelude
Changes in 1.12.2
- Include
IOErrorType
when printing uncaughtIOException
s (see #204)
Changes in 1.12.1
- Add
--module-name
option tohspec-discover
(see #168)
Changes in 1.12.0
- Add optional source location to spec items
- Move item requirement text from
SpecItem
constructor toItem
data type - Remove
BuildSpecs
constructor fromSpecTree
, havingrunIO
this is not really needed - Add
mapSpecTree
toTest.Hspec.Core
- Add
afterAll
(see #188) - Do not return
Result
fromhspecWith
and accept command-line options (the old behavior is still available ashspecWithResult
) - Rename
configHandle
toconfigOutputFile
- Omit empty
describe
groups from report - Do not pass position to
Formatter.exampleGroupStarted
(we can not support this with the upcomming cleanup actions #188) - Do not print empty lines before/after spec groups
- Deprecate
Test.Hspec.Formatters.newParagraph
Changes in 1.11.4
- Make test suite independent from QuickCheck seed (see #187)
Changes in 1.11.3
- Depend on
hspec-expectations-0.6.1
Changes in 1.11.2
- Add
beforeAll
Changes in 1.11.1
- Add
specify
as an alias forit
Changes in 1.11.0
- Add
BuildSpecs
constructor to internalSpecTree
data structure. This allows you to doIO
while constructing the spec tree. - Add
runIO
Changes in 1.10.0
- Do not use exception type to distinguish between synchronous/asynchronous exceptions (thanks to Michael Snoyman)
- Remove
Example
instance forTest.HUnit.Test
(#101), useTest.Hspec.HUnit.fromHUnitTest
instead. - Do not reexport
property
fromTest.Hspec.QuickCheck
- Move
ProgressCallback
out ofParams
- Add show instance for
Params
- Move requirement text from
Item
toSpecItem
constructor - Remove deprecated modules and functions
Changes in 1.9.5
- Make sure that ctrl-c works properly with GHC 7.8.* and QuickCheck-2.6
Changes in 1.9.4
- Compatibility with transformers-0.4.0.0
Changes in 1.9.3
- Make internal Tree data structure more strict (#169)
Changes in 1.9.2
- Print type of exceptions that are raised from QuickCheck properties (#94)
Changes in 1.9.1
- Bring back compatibility with older versions of QuickCheck (#166)
Changes in 1.9.0
- Depend on QuickCheck 2.7
Changes in 1.8.3
- Do not use color if
TERM=dumb
(see #158)
Changes in 1.8.2
hspec-discover
now accepts--no-main
which results in a top-level spec being generated instead of a test driver (thanks @DanielG)- Make sure that
after
is run on failing tests (see #159)
Changes in 1.8.1
- Add
shouldMatchList
Changes in 1.8.0
- Run
before
/after
/around
for each single check of a QuickCheck property - Add
Test.Hspec.Core.mapSpecItem
- Add
modifyMaxSuccess
,modifyMaxDiscardRatio
andmodifyMaxSize
toTest.Hspec.QuickCheck
- Don’t fail if callback is not called in
around
hspec-discover
: Remove--nested
optionhspec-discover
: IgnoreSpec.hs
/Spec.lhs
Changes in 1.7.2
- Add
after
andaround
Changes in 1.7.1
- Add
shouldContain
(thanks to Alfredo Di Napoli) - When printing progress, skip total if it is 0
- Do not colorize the description/requirement in failure list
Changes in 1.7.0
- Add
--depth
for use withhspec-smallcheck
Change in 1.6.2
- Add
before
- Add
--qc-max-discard
and--qc-max-size
Changes in 1.6.1
- Allow to specify the output file with
--out
Changes in 1.6.0
- Add support for parallelization
- Change license to MIT
- Add MonadIO instance for FormatM
- Add support for custom formatters to hspec-discover
- Add hspecResult
- Rename
--re-run
to--rerun
+ add documentation (#95) - Remove
configVerbose
- Use same
--qc-max-success
on--rerun
(#125) - Add command-line option
--no-color
,--color
does not accept arguments anymore (#130)
Changes in 1.5.4
- Make sure that QuickCheck is never chatty
- Make sure progress for QuickCheck examples is shown
Changes in 1.5.3
- Print “Randomized with seed …” only once
Changes in 1.5.2
- Add
--seed
, it can be used to specify the seed for QuickCheck properties - Reuse previous seed on
--re-run
Changes in 1.5.1
- Depend on quickcheck-io
Changes in 1.5.0
- Allow to use expectations as QuickCheck properties (#80)
- Do not suppress output to
stdout
- Change type of
pending
toExpectation
, addpendingWith
(#121) - Add the
example
function, it fixes the type of an Expectation (#86) - Rename
--fast-fail
to--fail-fast
(for consistency with RSpec) - Do not clutter Cabal test suite logs with QuickCheck output (#112)
- Skip redundant output from QuickCheck failure messages (#102)
Changes in 1.4.5
- hspec-discover now discovers .lhs files, too
Changes in 1.4.4
- Visually distinguish error message from requirements in the summary (#100)
- Export
formatException
fromTest.Hspec.Formatters
- Add
--fast-fail
(#82) - Print a summary on UserInterrupt/ctrl-c (#107)
Changes in 1.4.3
- Add
--dry-run
(#111)
Changes in 1.4.2
- Properly handle ctrl-c while running QuickCheck properties (#93)
- Default to
--color=always
when--color
is used without argument (#106) - treat
--qc-max-success
as an alias for--maximum-generated-tests
Changes in 1.4.1
- Used CPU time is now only included in the test summary if run with
--print-cpu-time
.
Changes in 1.4.0
- We now have a manual at https://hspec.github.io/. The sources are in
doc/
. It’s still work in progress. Contributions are very welcome! - The Haddock documentation now indicates the stability of each exposed
module.
Test.Hspec
is now considered stable. hspec
now supports command-line options--color
can be used to enable/disable colored output--format
can be used to pick a specific formatter--html
can be used to produce an HTML report--maximum-generated-tests
can be used to specify QuickCheck’smaxSuccess
--match
only runs spec items that match a given string--re-run
only runs spec items that previously failed. This is undocumented, experimental and only works within GHCi (use:reload
/:main
)!
- Runner functions exported from
Test.Hspec.Runner
new expect a monadic spec. fromHUnitTest
has been added. It can be used to run existing HUnit test suites with Hspec.- The
Example
instance for HUnitTest
s has been deprecated.fromHUnitTest
can be used instead. The primary motivation is, thatfromHUnitTest
gives more detailed reporting for nested HUnit test suites. Test.Hspec.Monadic
has been deprecated, all functionality is available through one ofTest.Hspec
,Test.Hspec.Core
orTest.Hspec.Runner
.- More of Hspec’s internals are now exposed from
Test.Hspec.Core
- All runner functions for the core spec type (aka as non-monadic spec) have
been deprecated, use e.g.
Test.Hspec.hspec . fromSpecList
instead. The motivation is to provide an API that does not expose colliding names. - Some other stuff from
Test.Hspec.Core
that collides with other parts of the API has been deprecated. Compatible alternatives are given in each deprecation message. - The default formatter now produces less whitespace (#73) + other minor improvements
- The formatter API has been revamped.
- The exception type is now printed if an example fails due to an exception (#50)
- The number of pending examples is now printed after each test run (#85)
--verbose
has been added (#87)
Changes in 1.3.0
-
Test.Hspec
now re-exports the monadic API. If you still use the non-monadic API, you can useTest.Hspec.Core
as a drop-in replacement. -
hspec-expectations
, a set of combinators that allow to express expectations about the outcome of code examples, is now included with Hspec. Have a look at the [README ofhspec-expectations
] (https://github.com/sol/hspec-expectations#readme) for a short introduction. -
hspec-discover
, a mechanism for automatic spec discovery, is now an official part of Hspec. Have a look at [hspec-discover
’s README] (https://github.com/hspec/hspec/tree/main/hspec-discover#readme) for a short introduction.
Changes in 1.2.0
-
hspec
has been removed, andhspecX
has been renamed tohspec
(see #71) -
hHspec
now returns a summary of the test run. -
The time reporting after a test run is not colored anymore.
Changes in 1.1.3
-
Test.Hspec
warns now about future changes: It will re-exportTest.Hspec.Monadic
in the future. If you still use the non-monadic API, you can either useTest.Hspec.Core
as a drop-in replacement, or migrate your code to the monadic API.The monadic API is more stable and easier to use. Now is a good time to switch!
-
Test.Hspec.Core
is now a proper superset ofTest.Hspec
Changes in 1.1.2
-
All descriptions of nested examples are now included in summary for failing examples
-
context
is now an alias fordescribe
Changes in 1.1.1
- Specs from Test.Hspec.Monadic has been renamed to Spec. For backward compatibility Specs is still kept as an alias.
Changes in 1.1.0
The reason for pending examples is now optional
With this change, both of the following code snippets work.
it "some behavior" $
pending -- no reason given
it "some other behavior" $
pending "some reason"
Hspec does not rely on ExistentialQuantification anymore
The type used to represent specs is now abstract
This should give more useful error messages when adapting old specs that use
the non-monadic API for hspec-1.0
/hspec-1.1
.
Several internal types and functions have been deprecated
Those are internal functions, and they will be removed/hidden with the next release. If you use any of those, update your code. If you really need them, open a ticket and describe your use case.
Changes in 1.0.0
Hspec now re-uses QuickCheck’s property function
Test.Hspec.QuickCheck.property
is now simply a re-exports of
Test.QuickCheck.property
. This has the advantage that you do not get a name
collision if you import both, Test.Hspec.QuickCheck
and Test.QuickCheck
.
Better support for nested specs
NOTE: This is a breaking change to the non-monadic API. The monadic API is not affected.
In some situations parent descriptions for nested specs were not included in the generated report. Solving this required a change to the data structure that is used to represent specs (it was not a proper tree, now it is).
Updating specs that use the non-monadic API
The runner functions (hspec
, hspecB
and hspecX
) now take a list of
descriptions.
The following works with hspec-0.9
, but not with hspec-1.0
.
main = hspecX $
describe "reverse" [
it "reverses a list" $
reverse [1, 2, 3] == [3, 2, 1],
it "gives the original list, if applied twice" $ property $
\xs -> reverse (reverse xs) == (xs :: [Int])
]
For hspec-1.0
, you need to wrap it into a list.
main = hspecX [
describe "reverse" [
it "reverses a list" $
reverse [1, 2, 3] == [3, 2, 1],
it "gives the original list, if applied twice" $ property $
\xs -> reverse (reverse xs) == (xs :: [Int])
]
]
Specs consisting of several describes, combined with descriptions
, continue
to work unchanged. But descriptions
is now a noop, and it will be removed in
a future release. So it is a good idea to drop it.
The following works with both hspec-0.9
and hspec-1.0
.
main = hspecX $ descriptions [ -- descriptions is redundant
describe "Foo" [
it "has some behavior" True
]
, describe "Bar" [
it "has some behavior" True
]
]
But the following is recommended instead.
main = hspecX [
describe "Foo" [
it "has some behavior" True
]
, describe "Bar" [
it "has some behavior" True
]
]
A new monadic API for custom Formatters
For all the details, have a look at the [docs] (https://hackage.haskell.org/packages/archive/hspec/latest/doc/html/Test-Hspec-Formatters.html).
The total time required to run a spec is now included in the summary
In addition to the used CPU time, the total time required to run a spec is now include in the summary. This is useful for specs that do non-CPU-intensive stuff, or fork subprocesses.