Quick API index

Domains

All assertions are classified into 19 domains to help navigate the API, depending on your use case.

API metrics

Counts for core functionality, and generated variants (formatted, forward, forward-formatted).

Kind	Count	Note
All core functions	135	Maintained core
All core assertions	131	Usage with `*testing.T`
Generic assertions	50	Type-safe assertions (“T” suffix)
Helpers (not assertions)	4	General-purpose utilities, not assertions
Others	0
assert/require variants	424	Generated variants
Total assertions variants	848	Available assertions API
Total API surface	858

Quick index

Table of core assertions, excluding variants. Each function is side by side with its logical opposite (when available).

Assertion	Opposite	Domain	Kind
CallerInfo		common	helper
Condition		condition
Consistently[C Conditioner]		condition
Contains	NotContains	collection
DirExists	DirNotExists	file
ElementsMatch	NotElementsMatch	collection
ElementsMatchT[E comparable]	NotElementsMatchT	collection
Empty	NotEmpty	equality
Equal	NotEqual	equality
EqualError		error
EqualExportedValues		equality
EqualT[V comparable]	NotEqualT	equality
EqualValues	NotEqualValues	equality
Error	NoError	error
ErrorAs	NotErrorAs	error
ErrorContains		error
ErrorIs	NotErrorIs	error
EventuallyWith[C CollectibleConditioner]		condition
Eventually[C Conditioner]	Never	condition
Exactly		equality
Fail		testing
FailNow		testing
FileEmpty	FileNotEmpty	file
FileExists	FileNotExists	file
Greater	LessOrEqual	comparison
GreaterOrEqual	Less	comparison
GreaterOrEqualT[Orderable Ordered]	LessT	comparison
GreaterT[Orderable Ordered]	LessOrEqualT	comparison
HTTPBody		http	helper
HTTPBodyContains	HTTPBodyNotContains	http
HTTPError		http
HTTPRedirect		http
HTTPStatusCode		http
HTTPSuccess		http
Implements	NotImplements	type
InDelta		number
InDeltaMapValues		number
InDeltaSlice		number
InDeltaT[Number Measurable]		number
InEpsilon		number
InEpsilonSlice		number
InEpsilonT[Number Measurable]		number
IsDecreasing	IsNonDecreasing	ordering
IsDecreasingT[OrderedSlice ~[]E, E Ordered]	IsNonDecreasingT	ordering
IsIncreasing	IsNonIncreasing	ordering
IsIncreasingT[OrderedSlice ~[]E, E Ordered]	IsNonIncreasingT	ordering
IsOfTypeT[EType any]	IsNotOfTypeT	type
IsType	IsNotType	type
JSONEq		json
JSONEqBytes		json
JSONEqT[EDoc, ADoc Text]		json
JSONMarshalAsT[EDoc Text]		json
JSONUnmarshalAsT[Object any, ADoc Text]		json
Kind	NotKind	type
Len		collection
MapContainsT[Map ~map[K]V, K comparable, V any]	MapNotContainsT	collection
MapEqualT[K, V comparable]	MapNotEqualT	collection
Nil	NotNil	equality
NoFileDescriptorLeak		safety
NoGoRoutineLeak		safety
ObjectsAreEqual		common	helper
ObjectsAreEqualValues		common	helper
Panics	NotPanics	panic
PanicsWithError		panic
PanicsWithValue		panic
Positive	Negative	comparison
PositiveT[SignedNumber SignedNumeric]	NegativeT	comparison
Regexp	NotRegexp	string
RegexpT[Rex RegExp, ADoc Text]	NotRegexpT	string
Same	NotSame	equality
SameT[P any]	NotSameT	equality
SeqContainsT[E comparable]	SeqNotContainsT	collection
SliceContainsT[Slice ~[]E, E comparable]	SliceNotContainsT	collection
SliceEqualT[E comparable]	SliceNotEqualT	collection
SliceSubsetT[Slice ~[]E, E comparable]	SliceNotSubsetT	collection
SortedT[OrderedSlice ~[]E, E Ordered]	NotSortedT	ordering
StringContainsT[ADoc, EDoc Text]	StringNotContainsT	collection
Subset	NotSubset	collection
True	False	boolean
TrueT[B Boolean]	FalseT	boolean
WithinDuration		time
WithinRange		time
YAMLEq		yaml
YAMLEqBytes		yaml
YAMLEqT[EDoc, ADoc Text]		yaml
YAMLMarshalAsT[EDoc Text]		yaml
YAMLUnmarshalAsT[Object any, ADoc Text]		yaml
Zero	NotZero	type