gen.go

package main

import (
	"../../../../gen"
	"log"
	"text/template"
)

func main() {
	t, err := template.New("").Parse(tmpl)
	if err != nil {
		log.Fatal(err)
	}
	j := map[string]any{
		"roll":  &[]Case{},
		"score": &[]Case{},
	}
	if err := gen.Gen("bowling", j, t); err != nil {
		log.Fatal(err)
	}
}

type Case struct {
	Description string `json:"description"`
	Input       struct {
		PreviousRolls []int `json:"previousRolls"`
		Roll          int   `json:"roll"`
	} `json:"input"`
	Expected any `json:"expected"`
}

func (t Case) Score() int {
	score, ok := t.Expected.(float64)
	if !ok {
		return 0
	}
	return int(score)
}

func (t Case) Valid() bool {
	_, ok := t.Expected.(float64)
	return ok
}

func (t Case) ExplainText() string {
	return gen.ErrorMessage(t.Expected)
}

// Template to generate two sets of test cases, one for Score tests and one for Roll tests.
var tmpl = `{{.Header}}

type testCaseScore struct {
	description    string
	previousRolls  []int	// bowling rolls to do before the Score() test
	valid          bool     // true => no error, false => error expected
	score          int	// when .valid == true, the expected score value
	explainText    string   // when .valid == false, error explanation text
}

var scoreTestCases = []testCaseScore { {{range .J.score}}
	{
		description: {{printf "%q"  .Description}},
		previousRolls: {{printf "%#v" .Input.PreviousRolls}},
		valid: {{printf "%v"  .Valid}},
		score: {{printf "%d"  .Score}},
		explainText: {{printf "%q"  .ExplainText}},
	},{{end}}
}


type testCaseRoll struct {
	description    string
	previousRolls  []int	// bowling rolls to do before the Roll(roll) test
	valid          bool     // true => no error, false => error expected
	roll           int	// pin count for the test roll
	explainText    string   // when .valid == false, error explanation text
}

var rollTestCases = []testCaseRoll { {{range .J.roll}}
	{
		description: {{printf "%q"  .Description}},
		previousRolls: {{printf "%#v" .Input.PreviousRolls}},
		valid: {{printf "%v"  .Valid}},
		roll: {{printf "%d"  .Input.Roll}},
		explainText: {{printf "%q"  .ExplainText}},
	},{{end}}
}
`