check

package module
v1.0.3 Latest Latest
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 Go to latest Published: May 18, 2023 License: BSD-2-Clause Imports: 21 Imported by: 1

README

Instructions

checkmate is meant to ease migrating off of gopkg.in/check.v1 and use the Go stdlib testing package instead. It achieves this by embedding a *testing.T in *check.C and ripping out the test runner code. This means that the following is now possible:

func myUsefulHelper(tb testing.TB, ...) {
    // ...
}

func (s *Suite) TestSomething(c *C) {
    myUsefulHelper(c, ...)
}

Use it as a global replacement:

$ go mod edit -replace=gopkg.in/check.v1=github.com/cilium/checkmate

Or replace imports manually:

import . "github.com/cilium/checkmate"
import check "github.com/cilium/checkmate"

Caveats

This library differs from upstream check in the following ways:

  • Run*() and TestingT() don't block until all tests have run
  • Run*() don't return Result anymore, due to the above
  • C.Succeed*() fails the test since there is no analog in *testing.T
  • RunConfig.KeepWorkDir is not supported
  • Any flags that are not benchmark related cause an error
  • The output format of check is not preserved

Documentation

Overview

Package check helps you migrate off of gopkg.in/check.v1

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func List 

func List(suite interface{}, runConf *RunConf) []string

List returns the names of the test functions in the given suite that will be run with the provided run configuration.

func ListAll 

func ListAll(runConf *RunConf) []string

ListAll returns the names of all the test functions registered with the Suite function that will be run with the provided run configuration.

func Run 

func Run(t *testing.T, suite interface{}, runConf *RunConf)

Run runs the provided test suite using the provided run configuration.

func RunAll 

func RunAll(t *testing.T, runConf *RunConf)

RunAll runs all test suites registered with the Suite function, using the provided run configuration.

func Suite 

func Suite(suite interface{}) interface{}

Suite registers the given value as a test suite to be run. Any methods starting with the Test prefix in the given value will be considered as a test method.

func TestingT 

func TestingT(testingT *testing.T)

TestingT runs all test suites registered with the Suite function, printing results to stdout, and reporting any failures back to the "testing" package.

Types

type C 

type C struct {
	*testing.T
	// contains filtered or unexported fields
}

func (*C) Assert 

func (c *C) Assert(obtained interface{}, checker Checker, args ...interface{})

Assert ensures that the first value matches the expected value according to the provided checker. If they do not match, an error is logged, the test is marked as failed, and the test execution stops.

Some checkers may not need the expected argument (e.g. IsNil).

If the last value in args implements CommentInterface, it is used to log additional information instead of being passed to the checker (see Commentf for an example).

func (*C) Check 

func (c *C) Check(obtained interface{}, checker Checker, args ...interface{}) bool

Check verifies if the first value matches the expected value according to the provided checker. If they do not match, an error is logged, the test is marked as failed, and the test execution continues.

Some checkers may not need the expected argument (e.g. IsNil).

If the last value in args implements CommentInterface, it is used to log additional information instead of being passed to the checker (see Commentf for an example).

func (*C) Error 

func (c *C) Error(args ...interface{})

Error logs an error into the test error output and marks the test as failed. The provided arguments are assembled together into a string with fmt.Sprint.

func (*C) Errorf 

func (c *C) Errorf(format string, args ...interface{})

Errorf logs an error into the test error output and marks the test as failed. The provided arguments are assembled together into a string with fmt.Sprintf.

func (*C) ExpectFailure 

func (c *C) ExpectFailure(reason string)

ExpectFailure informs that the running test is knowingly broken for the provided reason. If the test does not fail, an error will be reported to raise attention to this fact. This method is useful to temporarily disable tests which cover well known problems until a better time to fix the problem is found, without forgetting about the fact that a failure still exists.

func (*C) Fail 

func (c *C) Fail()

Fail marks the currently running test as failed.

Something ought to have been previously logged so the developer can tell what went wrong. The higher level helper functions will fail the test and do the logging properly.

func (*C) FailNow 

func (c *C) FailNow()

FailNow marks the currently running test as failed and stops running it. Something ought to have been previously logged so the developer can tell what went wrong. The higher level helper functions will fail the test and do the logging properly.

func (*C) Failed 

func (c *C) Failed() bool

Failed returns whether the currently running test has already failed.

func (*C) Fatal 

func (c *C) Fatal(args ...interface{})

Fatal logs an error into the test error output, marks the test as failed, and stops the test execution. The provided arguments are assembled together into a string with fmt.Sprint.

func (*C) Fatalf 

func (c *C) Fatalf(format string, args ...interface{})

Fatlaf logs an error into the test error output, marks the test as failed, and stops the test execution. The provided arguments are assembled together into a string with fmt.Sprintf.

func (*C) GetTestLog 

func (c *C) GetTestLog() string

GetTestLog returns the current test error output.

func (*C) Log 

func (c *C) Log(args ...interface{})

Log logs some information into the test error output. The provided arguments are assembled together into a string with fmt.Sprint.

func (*C) Logf 

func (c *C) Logf(format string, args ...interface{})

Log logs some information into the test error output. The provided arguments are assembled together into a string with fmt.Sprintf.

func (*C) MkDir 

func (c *C) MkDir() string

Create a new temporary directory which is automatically removed after the suite finishes running.

func (*C) Output 

func (c *C) Output(calldepth int, s string) error

Output enables *C to be used as a logger in functions that require only the minimum interface of *log.Logger.

func (*C) ResetTimer 

func (c *C) ResetTimer()

ResetTimer sets the elapsed benchmark time to zero. It does not affect whether the timer is running.

func (*C) SetBytes 

func (c *C) SetBytes(n int64)

SetBytes informs the number of bytes that the benchmark processes on each iteration. If this is called in a benchmark it will also report MB/s.

func (*C) StartTimer 

func (c *C) StartTimer()

StartTimer starts timing a test. This function is called automatically before a benchmark starts, but it can also used to resume timing after a call to StopTimer.

func (*C) StopTimer 

func (c *C) StopTimer()

StopTimer stops timing a test. This can be used to pause the timer while performing complex initialization that you don't want to measure.

func (*C) Succeed 

func (c *C) Succeed()

Succeed marks the currently running test as succeeded, undoing any previous failures.

func (*C) SucceedNow 

func (c *C) SucceedNow()

SucceedNow marks the currently running test as succeeded, undoing any previous failures, and stops running the test.

func (*C) TestName 

func (c *C) TestName() string

TestName returns the current test name in the form "SuiteName.TestName"

type Checker 

type Checker interface {
	Info() *CheckerInfo
	Check(params []interface{}, names []string) (result bool, error string)
}

The Checker interface must be provided by checkers used with the Assert and Check verification methods. 

var DeepEquals Checker = &deepEqualsChecker{
	&CheckerInfo{Name: "DeepEquals", Params: []string{"obtained", "expected"}},
}

The DeepEquals checker verifies that the obtained value is deep-equal to the expected value. The check will work correctly even when facing slices, interfaces, and values of different types (which always fail the test).

For example: 

c.Assert(value, DeepEquals, 42)
c.Assert(array, DeepEquals, []string{"hi", "there"})

var Equals Checker = &equalsChecker{
	&CheckerInfo{Name: "Equals", Params: []string{"obtained", "expected"}},
}

The Equals checker verifies that the obtained value is equal to the expected value, according to usual Go semantics for ==.

For example: 

c.Assert(value, Equals, 42)

var ErrorMatches Checker = errorMatchesChecker{
	&CheckerInfo{Name: "ErrorMatches", Params: []string{"value", "regex"}},
}

The ErrorMatches checker verifies that the error value is non nil and matches the regular expression provided.

For example: 

c.Assert(err, ErrorMatches, "perm.*denied")

var FitsTypeOf Checker = &fitsTypeChecker{
	&CheckerInfo{Name: "FitsTypeOf", Params: []string{"obtained", "sample"}},
}

The FitsTypeOf checker verifies that the obtained value is assignable to a variable with the same type as the provided sample value.

For example: 

c.Assert(value, FitsTypeOf, int64(0))
c.Assert(value, FitsTypeOf, os.Error(nil))

var HasLen Checker = &hasLenChecker{
	&CheckerInfo{Name: "HasLen", Params: []string{"obtained", "n"}},
}

The HasLen checker verifies that the obtained value has the provided length. In many cases this is superior to using Equals in conjunction with the len function because in case the check fails the value itself will be printed, instead of its length, providing more details for figuring the problem.

For example: 

c.Assert(list, HasLen, 5)

var Implements Checker = &implementsChecker{
	&CheckerInfo{Name: "Implements", Params: []string{"obtained", "ifaceptr"}},
}

The Implements checker verifies that the obtained value implements the interface specified via a pointer to an interface variable.

For example: 

var e os.Error
c.Assert(err, Implements, &e)

var IsNil Checker = &isNilChecker{
	&CheckerInfo{Name: "IsNil", Params: []string{"value"}},
}

The IsNil checker tests whether the obtained value is nil.

For example: 

c.Assert(err, IsNil)

var Matches Checker = &matchesChecker{
	&CheckerInfo{Name: "Matches", Params: []string{"value", "regex"}},
}

The Matches checker verifies that the string provided as the obtained value (or the string resulting from obtained.String()) matches the regular expression provided.

For example: 

c.Assert(err, Matches, "perm.*denied")

var NotNil Checker = &notNilChecker{
	&CheckerInfo{Name: "NotNil", Params: []string{"value"}},
}

The NotNil checker verifies that the obtained value is not nil.

For example: 

c.Assert(iface, NotNil)

This is an alias for Not(IsNil), made available since it's a fairly common check. 

var PanicMatches Checker = &panicMatchesChecker{
	&CheckerInfo{Name: "PanicMatches", Params: []string{"function", "expected"}},
}

The PanicMatches checker verifies that calling the provided zero-argument function will cause a panic with an error value matching the regular expression provided.

For example: 

c.Assert(func() { f(1, 2) }, PanicMatches, `open.*: no such file or directory`).

var Panics Checker = &panicsChecker{
	&CheckerInfo{Name: "Panics", Params: []string{"function", "expected"}},
}

The Panics checker verifies that calling the provided zero-argument function will cause a panic which is deep-equal to the provided value.

For example: 

c.Assert(func() { f(1, 2) }, Panics, &SomeErrorType{"BOOM"}).

func Not 

func Not(checker Checker) Checker

The Not checker inverts the logic of the provided checker. The resulting checker will succeed where the original one failed, and vice-versa.

For example: 

c.Assert(a, Not(Equals), b)

type CheckerInfo 

type CheckerInfo struct {
	Name   string
	Params []string
}

See the Checker interface.

func (*CheckerInfo) Info 

func (info *CheckerInfo) Info() *CheckerInfo

type CommentInterface 

type CommentInterface interface {
	CheckCommentString() string
}

CommentInterface must be implemented by types that attach extra information to failed checks. See the Commentf function for details.

func Commentf 

func Commentf(format string, args ...interface{}) CommentInterface

Commentf returns an infomational value to use with Assert or Check calls. If the checker test fails, the provided arguments will be passed to fmt.Sprintf, and will be presented next to the logged failure.

For example: 

c.Assert(v, Equals, 42, Commentf("Iteration #%d failed.", i))

Note that if the comment is constant, a better option is to simply use a normal comment right above or next to the line, as it will also get printed with any errors: 

c.Assert(l, Equals, 8192) // Ensure buffer size is correct (bug #123)

type Result 

type Result struct {
	Succeeded        int
	Failed           int
	Skipped          int
	Panicked         int
	FixturePanicked  int
	ExpectedFailures int
	Missed           int    // Not even tried to run, related to a panic in the fixture.
	RunError         error  // Houston, we've got a problem.
	WorkDir          string // If KeepWorkDir is true
}

func (*Result) Add 

func (r *Result) Add(other *Result)

func (*Result) Passed 

func (r *Result) Passed() bool

func (*Result) String 

func (r *Result) String() string

type RunConf 

type RunConf struct {
	Output        io.Writer
	Stream        bool
	Verbose       bool
	Filter        string
	Benchmark     bool
	BenchmarkTime time.Duration // Defaults to 1 second
	BenchmarkMem  bool
	KeepWorkDir   bool
}

Source Files

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