Slice

func Slice(model any, expectedEntries ...ArrayEntries) TestDeep

Slice operator compares the contents of a slice or a pointer on a slice against the values of model and the values of expectedEntries. Entries with zero values of model are ignored if the same entry is present in expectedEntries, otherwise they are taken into account. An entry cannot be present in both model and expectedEntries, except if it is a zero-value in model. At the end, all entries are checked. To check only some entries of a slice, see SuperSliceOf operator.

model must be the same type as compared data.

expectedEntries can be omitted, if no zero entries are expected and no TestDeep operators are involved. If expectedEntries contains more than one item, all items are merged before their use, from left to right.

got := []int{12, 14, 17}
td.Cmp(t, got, td.Slice([]int{0, 14}, td.ArrayEntries{0: 12, 2: 17})) // succeeds
td.Cmp(t, &got,
  td.Slice(&[]int{0, 14}, td.ArrayEntries{0: td.Gt(10), 2: td.Gt(15)})) // succeeds

TypeBehind method returns the reflect.Type of model.

See also Array, List and SuperSliceOf.

See also Slice godoc.

Examples

Slice example

	t := &testing.T{}

	got := []int{42, 58, 26}

	ok := td.Cmp(t, got, td.Slice([]int{42}, td.ArrayEntries{1: 58, 2: td.Ignore()}),
		"checks slice %v", got)
	fmt.Println(ok)

	ok = td.Cmp(t, got,
		td.Slice([]int{}, td.ArrayEntries{0: 42, 1: 58, 2: td.Ignore()}),
		"checks slice %v", got)
	fmt.Println(ok)

	ok = td.Cmp(t, got,
		td.Slice(([]int)(nil), td.ArrayEntries{0: 42, 1: 58, 2: td.Ignore()}),
		"checks slice %v", got)
	fmt.Println(ok)

	// Output:
	// true
	// true
	// true

TypedSlice example

	t := &testing.T{}

	type MySlice []int

	got := MySlice{42, 58, 26}

	ok := td.Cmp(t, got, td.Slice(MySlice{42}, td.ArrayEntries{1: 58, 2: td.Ignore()}),
		"checks typed slice %v", got)
	fmt.Println(ok)

	ok = td.Cmp(t, &got, td.Slice(&MySlice{42}, td.ArrayEntries{1: 58, 2: td.Ignore()}),
		"checks pointer on typed slice %v", got)
	fmt.Println(ok)

	ok = td.Cmp(t, &got,
		td.Slice(&MySlice{}, td.ArrayEntries{0: 42, 1: 58, 2: td.Ignore()}),
		"checks pointer on typed slice %v", got)
	fmt.Println(ok)

	ok = td.Cmp(t, &got,
		td.Slice((*MySlice)(nil), td.ArrayEntries{0: 42, 1: 58, 2: td.Ignore()}),
		"checks pointer on typed slice %v", got)
	fmt.Println(ok)

	// Output:
	// true
	// true
	// true
	// true

CmpSlice shortcut

func CmpSlice(t TestingT, got, model any, expectedEntries ArrayEntries, args ...any) bool

CmpSlice is a shortcut for:

td.Cmp(t, got, td.Slice(model, expectedEntries), args...)

See above for details.

Slice optional parameter expectedEntries is here mandatory. nil value should be passed to mimic its absence in original Slice call.

Returns true if the test is OK, false if it fails.

If t is a *T then its Config field is inherited.

args… are optional and allow to name the test. This name is used in case of failure to qualify the test. If len(args) > 1 and the first item of args is a string and contains a ‘%’ rune then fmt.Fprintf is used to compose the name, else args are passed to fmt.Fprint. Do not forget it is the name of the test, not the reason of a potential failure.

See also CmpSlice godoc.

Examples

Slice example

	t := &testing.T{}

	got := []int{42, 58, 26}

	ok := td.CmpSlice(t, got, []int{42}, td.ArrayEntries{1: 58, 2: td.Ignore()},
		"checks slice %v", got)
	fmt.Println(ok)

	ok = td.CmpSlice(t, got, []int{}, td.ArrayEntries{0: 42, 1: 58, 2: td.Ignore()},
		"checks slice %v", got)
	fmt.Println(ok)

	ok = td.CmpSlice(t, got, ([]int)(nil), td.ArrayEntries{0: 42, 1: 58, 2: td.Ignore()},
		"checks slice %v", got)
	fmt.Println(ok)

	// Output:
	// true
	// true
	// true

TypedSlice example

	t := &testing.T{}

	type MySlice []int

	got := MySlice{42, 58, 26}

	ok := td.CmpSlice(t, got, MySlice{42}, td.ArrayEntries{1: 58, 2: td.Ignore()},
		"checks typed slice %v", got)
	fmt.Println(ok)

	ok = td.CmpSlice(t, &got, &MySlice{42}, td.ArrayEntries{1: 58, 2: td.Ignore()},
		"checks pointer on typed slice %v", got)
	fmt.Println(ok)

	ok = td.CmpSlice(t, &got, &MySlice{}, td.ArrayEntries{0: 42, 1: 58, 2: td.Ignore()},
		"checks pointer on typed slice %v", got)
	fmt.Println(ok)

	ok = td.CmpSlice(t, &got, (*MySlice)(nil), td.ArrayEntries{0: 42, 1: 58, 2: td.Ignore()},
		"checks pointer on typed slice %v", got)
	fmt.Println(ok)

	// Output:
	// true
	// true
	// true
	// true

T.Slice shortcut

func (t *T) Slice(got, model any, expectedEntries ArrayEntries, args ...any) bool

Slice is a shortcut for:

t.Cmp(got, td.Slice(model, expectedEntries), args...)

See above for details.

Slice optional parameter expectedEntries is here mandatory. nil value should be passed to mimic its absence in original Slice call.

Returns true if the test is OK, false if it fails.

See also T.Slice godoc.

Examples

Slice example

	t := td.NewT(&testing.T{})

	got := []int{42, 58, 26}

	ok := t.Slice(got, []int{42}, td.ArrayEntries{1: 58, 2: td.Ignore()},
		"checks slice %v", got)
	fmt.Println(ok)

	ok = t.Slice(got, []int{}, td.ArrayEntries{0: 42, 1: 58, 2: td.Ignore()},
		"checks slice %v", got)
	fmt.Println(ok)

	ok = t.Slice(got, ([]int)(nil), td.ArrayEntries{0: 42, 1: 58, 2: td.Ignore()},
		"checks slice %v", got)
	fmt.Println(ok)

	// Output:
	// true
	// true
	// true

TypedSlice example

	t := td.NewT(&testing.T{})

	type MySlice []int

	got := MySlice{42, 58, 26}

	ok := t.Slice(got, MySlice{42}, td.ArrayEntries{1: 58, 2: td.Ignore()},
		"checks typed slice %v", got)
	fmt.Println(ok)

	ok = t.Slice(&got, &MySlice{42}, td.ArrayEntries{1: 58, 2: td.Ignore()},
		"checks pointer on typed slice %v", got)
	fmt.Println(ok)

	ok = t.Slice(&got, &MySlice{}, td.ArrayEntries{0: 42, 1: 58, 2: td.Ignore()},
		"checks pointer on typed slice %v", got)
	fmt.Println(ok)

	ok = t.Slice(&got, (*MySlice)(nil), td.ArrayEntries{0: 42, 1: 58, 2: td.Ignore()},
		"checks pointer on typed slice %v", got)
	fmt.Println(ok)

	// Output:
	// true
	// true
	// true
	// true