66 lines
1.3 KiB
Go
66 lines
1.3 KiB
Go
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package main
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import (
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"reflect"
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"testing"
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)
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func TestAdder(t *testing.T) {
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assertCorrectMessage := func(t testing.TB, sum, expect int) {
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if sum != expect {
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t.Errorf("expected %d but got %d", sum, expect)
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}
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}
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t.Run("2 + 2", func(t *testing.T) {
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numbers := []int{2, 2}
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sum := Add(numbers)
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expect := 4
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assertCorrectMessage(t, sum, expect)
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})
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t.Run("1 + 1", func(t *testing.T) {
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numbers := []int{1, 1}
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sum := Add(numbers)
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expect := 2
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assertCorrectMessage(t, sum, expect)
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})
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t.Run("1 + 2 + 3 + 4 + 5", func(t *testing.T) {
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numbers := []int{1, 2, 3, 4, 5}
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sum := Add(numbers)
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expect := 15
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assertCorrectMessage(t, sum, expect)
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})
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}
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func TestAdderSlice(t *testing.T) {
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got := SumAll([]int{1, 2}, []int{0, 9})
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want := []int{3, 9}
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// this is not type safe
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if !reflect.DeepEqual(got, want) {
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t.Errorf("got %v want %v", got, want)
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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.TB, got, want []int) {
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t.Helper()
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if !reflect.DeepEqual(got, want) {
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t.Errorf("got %v want %v", got, want)
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}
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}
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t.Run("make the some of some slices", func(t *testing.T) {
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got := SumAllTails([]int{1, 2}, []int{0, 9})
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want := []int{2, 9}
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checkSums(t, got, want)
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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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want := []int{0, 9}
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checkSums(t, got, want)
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})
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}
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