36 lines
1.0 KiB
Markdown
36 lines
1.0 KiB
Markdown
# Testing
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Go has a lightweight test framework composed of the go test command and the testing package.
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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.
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```bash
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cp -r 3-importremote 4-testing
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# change importremote to testing
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nano go.mod
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nano hello.go
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# create test for reverse
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cd importpackage
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nano reverse_test.go
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> package morestrings
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>
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> import "testing"
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>
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> func TestReverseRunes(t *testing.T) {
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> cases := []struct {
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> in, want string
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> }{
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> {"Hello, world", "dlrow ,olleH"},
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> {"Hello, 世界", "界世 ,olleH"},
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> {"", ""},
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> }
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> for _, c := range cases {
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> got := ReverseRunes(c.in)
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> if got != c.want {
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> t.Errorf("ReverseRunes(%q) == %q, want %q", c.in, got, c.want)
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> }
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> }
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> }
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go build
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# run test code
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go test
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``` |