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package main
import "testing"
//go:noinline
func testSliceLenCap12_ssa(a [10]int, i, j int) (int, int) {
b := a[i:j]
return len(b), cap(b)
}
//go:noinline
func testSliceLenCap1_ssa(a [10]int, i, j int) (int, int) {
b := a[i:]
return len(b), cap(b)
}
//go:noinline
func testSliceLenCap2_ssa(a [10]int, i, j int) (int, int) {
b := a[:j]
return len(b), cap(b)
}
func testSliceLenCap(t *testing.T) {
a := [10]int{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
tests := [...]struct {
fn func(a [10]int, i, j int) (int, int)
i, j int // slice range
l, c int // len, cap
}{
// -1 means the value is not used.
{testSliceLenCap12_ssa, 0, 0, 0, 10},
{testSliceLenCap12_ssa, 0, 1, 1, 10},
{testSliceLenCap12_ssa, 0, 10, 10, 10},
{testSliceLenCap12_ssa, 10, 10, 0, 0},
{testSliceLenCap12_ssa, 0, 5, 5, 10},
{testSliceLenCap12_ssa, 5, 5, 0, 5},
{testSliceLenCap12_ssa, 5, 10, 5, 5},
{testSliceLenCap1_ssa, 0, -1, 0, 10},
{testSliceLenCap1_ssa, 5, -1, 5, 5},
{testSliceLenCap1_ssa, 10, -1, 0, 0},
{testSliceLenCap2_ssa, -1, 0, 0, 10},
{testSliceLenCap2_ssa, -1, 5, 5, 10},
{testSliceLenCap2_ssa, -1, 10, 10, 10},
}
for i, test := range tests {
if l, c := test.fn(a, test.i, test.j); l != test.l && c != test.c {
t.Errorf("#%d len(a[%d:%d]), cap(a[%d:%d]) = %d %d, want %d %d", i, test.i, test.j, test.i, test.j, l, c, test.l, test.c)
}
}
}
//go:noinline
func testSliceGetElement_ssa(a [10]int, i, j, p int) int {
return a[i:j][p]
}
func testSliceGetElement(t *testing.T) {
a := [10]int{0, 10, 20, 30, 40, 50, 60, 70, 80, 90}
tests := [...]struct {
i, j, p int
want int // a[i:j][p]
}{
{0, 10, 2, 20},
{0, 5, 4, 40},
{5, 10, 3, 80},
{1, 9, 7, 80},
}
for i, test := range tests {
if got := testSliceGetElement_ssa(a, test.i, test.j, test.p); got != test.want {
t.Errorf("#%d a[%d:%d][%d] = %d, wanted %d", i, test.i, test.j, test.p, got, test.want)
}
}
}
//go:noinline
func testSliceSetElement_ssa(a *[10]int, i, j, p, x int) {
(*a)[i:j][p] = x
}
func testSliceSetElement(t *testing.T) {
a := [10]int{0, 10, 20, 30, 40, 50, 60, 70, 80, 90}
tests := [...]struct {
i, j, p int
want int // a[i:j][p]
}{
{0, 10, 2, 17},
{0, 5, 4, 11},
{5, 10, 3, 28},
{1, 9, 7, 99},
}
for i, test := range tests {
testSliceSetElement_ssa(&a, test.i, test.j, test.p, test.want)
if got := a[test.i+test.p]; got != test.want {
t.Errorf("#%d a[%d:%d][%d] = %d, wanted %d", i, test.i, test.j, test.p, got, test.want)
}
}
}
func testSlicePanic1(t *testing.T) {
defer func() {
if r := recover(); r != nil {
//println("panicked as expected")
}
}()
a := [10]int{0, 10, 20, 30, 40, 50, 60, 70, 80, 90}
testSliceLenCap12_ssa(a, 3, 12)
t.Errorf("expected to panic, but didn't")
}
func testSlicePanic2(t *testing.T) {
defer func() {
if r := recover(); r != nil {
//println("panicked as expected")
}
}()
a := [10]int{0, 10, 20, 30, 40, 50, 60, 70, 80, 90}
testSliceGetElement_ssa(a, 3, 7, 4)
t.Errorf("expected to panic, but didn't")
}
func TestArray(t *testing.T) {
testSliceLenCap(t)
testSliceGetElement(t)
testSliceSetElement(t)
testSlicePanic1(t)
testSlicePanic2(t)
}