51 lines
952 B
Go
51 lines
952 B
Go
package sum
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import (
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"slices"
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"testing"
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)
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func TestSum(t *testing.T) {
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t.Run("collection of 5 numbers", func(t *testing.T) {
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numbers := []int{1, 2, 3, 4, 5}
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got := Sum(numbers)
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exp := 15
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if got != exp {
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t.Errorf("got %d, expected %d, given %v", got, exp, numbers)
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}
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})
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}
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func TestSumAll(t *testing.T) {
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got := SumAll([]int{1, 2}, []int{0, 9})
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exp := []int{3, 9}
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if !slices.Equal(got, exp) {
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t.Errorf("got %d, expected %d", got, exp)
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}
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}
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func TestSumAllTails(t *testing.T) {
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checkSums := func(t *testing.T, got, exp []int) {
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if !slices.Equal(got, exp) {
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t.Errorf("got %d, expected %d", got, exp)
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}
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}
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t.Run("make the sums of some slices", func(t *testing.T) {
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got := SumAllTails([]int{1, 2}, []int{0, 9})
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exp := []int{2, 9}
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checkSums(t, got, exp)
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})
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t.Run("safely sum empty slices", func(t *testing.T) {
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got := SumAllTails([]int{}, []int{3, 4, 5})
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exp := []int{0, 9}
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checkSums(t, got, exp)
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})
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}
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