/
template.go
74 lines (60 loc) · 1.55 KB
/
template.go
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package main
import (
"bytes"
"go/format"
"log"
"text/template"
)
type testFileTemplateStruct struct {
// params type in test case
InputType string
ExpectType string
InputParamsStruct string // if input params' type more than 1, define struct
InputParamsForInvoke string
ExportedFuncName string // part of test function name, like 'Testxxx', without 'Test-' prefix
InvokeFuncName string // for invoke function
SpelledFuncName string // in error message
}
const (
fileName = "main.go"
testFileName = "main_test.go"
)
const testFileTemplate = `
package mario
import "testing"
{{.InputParamsStruct}}
var testCase = []struct {
In {{.InputType}}
Expect {{.ExpectType}}
}{
// test cases here
{},
}
func Test{{.ExportedFuncName}}(t *testing.T) {
for i := range testCase {
if {{.InvokeFuncName}}({{.InputParamsForInvoke}}) != testCase[i].Expect {
t.Logf("{{.SpelledFuncName}} test failed on case: %d\n", i)
t.Fail()
}
}
}
`
func (t *testFileTemplateStruct) fillTemplate() ([]byte, error) {
templateIns, err := template.New("generator").Parse(testFileTemplate)
if err != nil {
log.Println("parse template failed, error: ", err)
return nil, err
}
buffer := bytes.NewBufferString("")
if err = templateIns.Execute(buffer, t); err != nil {
log.Println("fill template failed, error: ", err)
return nil, err
}
// format go code, unnecessary in generate no-go code
result, err := format.Source(buffer.Bytes())
if err != nil {
log.Println("format source failed, error: ", err)
return nil, err
}
return result, nil
}