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|
package iterator_test
import (
"testing"
"git.sr.ht/~rjarry/aerc/lib/iterator"
)
type indexer struct {
start int
end int
}
func (ip *indexer) StartIndex() int {
return ip.start
}
func (ip *indexer) EndIndex() int {
return ip.end
}
func TestMoveIndex(t *testing.T) {
tests := []struct {
idx int
delta int
start int
end int
cb iterator.BoundsCheckFunc
expected int
}{
{
idx: 0,
delta: 1,
start: 0,
end: 2,
cb: iterator.FixBounds,
expected: 1,
},
{
idx: 0,
delta: 5,
start: 0,
end: 2,
cb: iterator.FixBounds,
expected: 2,
},
{
idx: 0,
delta: -1,
start: 0,
end: 2,
cb: iterator.FixBounds,
expected: 0,
},
{
idx: 0,
delta: 2,
start: 0,
end: 2,
cb: iterator.WrapBounds,
expected: 2,
},
{
idx: 0,
delta: 3,
start: 0,
end: 2,
cb: iterator.WrapBounds,
expected: 0,
},
{
idx: 0,
delta: -1,
start: 0,
end: 2,
cb: iterator.WrapBounds,
expected: 2,
},
{
idx: 2,
delta: 2,
start: 0,
end: 2,
cb: iterator.WrapBounds,
expected: 1,
},
{
idx: 0,
delta: -2,
start: 0,
end: 2,
cb: iterator.WrapBounds,
expected: 1,
},
{
idx: 1,
delta: 1,
start: 2,
end: 0,
cb: iterator.FixBounds,
expected: 0,
},
{
idx: 0,
delta: 1,
start: 2,
end: 0,
cb: iterator.FixBounds,
expected: 0,
},
{
idx: 0,
delta: 1,
start: 2,
end: 0,
cb: iterator.WrapBounds,
expected: 2,
},
}
for i, test := range tests {
idx := iterator.MoveIndex(
test.idx,
test.delta,
&indexer{test.start, test.end},
test.cb,
)
if idx != test.expected {
t.Errorf("test %d [%#v] failed: got %d but expected %d",
i, test, idx, test.expected)
}
}
}
|
