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02_kth_to_last_test.go
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02_kth_to_last_test.go
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package ch02
import "testing"
func TestKthToLast(t *testing.T) {
node := New(1)
node.AppendToTail(2)
node.AppendToTail(3)
node.AppendToTail(4)
node.AppendToTail(5)
k := 0
actual := KthToLast(node, k).data
expected := 5
if actual != expected {
t.Errorf("%dth element expected to be %v, got %v", k, expected, actual)
}
k = 2
actual = KthToLast(node, k).data
expected = 3
if actual != expected {
t.Errorf("%dth element expected to be %v, got %v", k, expected, actual)
}
k = 4
actual = KthToLast(node, k).data
expected = 1
if actual != expected {
t.Errorf("%dth element expected to be %v, got %v", k, expected, actual)
}
}
func TestKthToLastRecursive(t *testing.T) {
node := New(1)
node.AppendToTail(2)
node.AppendToTail(3)
node.AppendToTail(4)
node.AppendToTail(5)
k := 0
actual, _ := KthToLastRecursive(node, k)
expected := 5
if actual.data != expected {
t.Errorf("%dth element expected to be %v, got %v", k, expected, actual.data)
}
k = 2
actual, _ = KthToLastRecursive(node, k)
expected = 3
if actual.data != expected {
t.Errorf("%dth element expected to be %v, got %v", k, expected, actual.data)
}
k = 4
actual, _ = KthToLastRecursive(node, k)
expected = 1
if actual.data != expected {
t.Errorf("%dth element expected to be %v, got %v", k, expected, actual.data)
}
}
func TestKthToLastIterative(t *testing.T) {
node := New(1)
node.AppendToTail(2)
node.AppendToTail(3)
node.AppendToTail(4)
node.AppendToTail(5)
k := 0
actual := KthToLastIterative(node, k).data
expected := 5
if actual != expected {
t.Errorf("%dth element expected to be %v, got %v", k, expected, actual)
}
k = 2
actual = KthToLastIterative(node, k).data
expected = 3
if actual != expected {
t.Errorf("%dth element expected to be %v, got %v", k, expected, actual)
}
k = 4
actual = KthToLastIterative(node, k).data
expected = 1
if actual != expected {
t.Errorf("%dth element expected to be %v, got %v", k, expected, actual)
}
}