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tokencoverage_test.go
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tokencoverage_test.go
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package main
import (
"strings"
"testing"
. "github.com/zimmski/tavor/test/assert"
"github.com/zimmski/tavor/fuzz/strategy"
"github.com/zimmski/tavor/log"
"github.com/zimmski/tavor/parser"
"github.com/zimmski/tavor/test"
//"github.com/zimmski/tavor/token"
)
func TestTokenCoverageToBeStrategy(t *testing.T) {
var strat *strategy.Strategy
Implements(t, strat, &TokenCoverage{})
}
func TestTokenCoverage(t *testing.T) {
log.LevelDebug()
validateTavorTokenCoverage(
t,
`
START = (0 | 1) 2 (3 | 4)
`,
[]string{
"023",
"124",
},
)
// enable an option only if its token is not already fully covered
validateTavorTokenCoverage(
t,
`
START = (1 | 2) ?(3)
`,
[]string{
"13",
"2",
},
)
validateTavorTokenCoverage(
t,
`
$Num Int
START = Num | [\d]
`,
[]string{
"0",
"0",
},
)
validateTavorTokenCoverage(
t,
`
START = (0 (1 | 2 | 3 ?("a")) 4 (5 | 6)) | "b"
`,
[]string{
"03a45",
"0146",
"0245",
"b",
},
)
// Test that repetitions are used to maximize the coverage of ONE test
// and that they are not repeated unnecessarily
// e.g., 2 repetitions out of 3 are enough here
validateTavorTokenCoverage(
t,
`
START = +1,3((0 | 1) 2 (3 | 4) " ")
`,
[]string{
"023 124 ",
},
)
// Test that repetitions are re-used properly accross multiple tests
// when necessary
validateTavorTokenCoverage(
t,
`
START = +1,2((0 | 1 | 2) " ")
`,
[]string{
"0 1 ",
"2 0 ",
},
)
}
func validateTavorTokenCoverage(t *testing.T, format string, expect []string) {
r := test.NewRandTest(1)
o, err := parser.ParseTavor(strings.NewReader(format))
Nil(t, err)
s := NewTokenCoverage(o)
ch, err := s.Fuzz(r)
Nil(t, err)
var got []string
for i := range ch {
got = append(got, o.String())
ch <- i
}
Equal(t, expect, got)
}
/*
func TestTokenCoverageLoopDetection(t *testing.T) {
testStrategyLoopDetection(t, func(root token.Token) strategy.Strategy {
return NewTokenCoverage(root)
})
}
*/