1.0 KiB
1.0 KiB
Testing
Go has a lightweight test framework composed of the go test command and the testing package.
Write a test by creating a file with a name ending in _test.go that contains functions named TestXXX with signature func (t *testing.T). The test framework runs each such function; if the function calls a failure function such as t.Error or t.Fail, the test is considered to have failed.
cp -r 3-importremote 4-testing
# change importremote to testing
nano go.mod
nano hello.go
# create test for reverse
cd importpackage
nano reverse_test.go
> package morestrings
>
> import "testing"
>
> func TestReverseRunes(t *testing.T) {
> cases := []struct {
> in, want string
> }{
> {"Hello, world", "dlrow ,olleH"},
> {"Hello, 世界", "界世 ,olleH"},
> {"", ""},
> }
> for _, c := range cases {
> got := ReverseRunes(c.in)
> if got != c.want {
> t.Errorf("ReverseRunes(%q) == %q, want %q", c.in, got, c.want)
> }
> }
> }
go build
# run test code
go test