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package subex
import (
"main/walk"
"reflect"
"strings"
"testing"
)
func buildTransducer(subex string) Transducer {
lexer := NewStringRuneReader(subex)
ast := Parse(lexer)
transducer := CompileTransducer(ast)
return transducer
}
func fmtValueList(values []walk.Value) string {
var builder strings.Builder
builder.WriteRune('[')
for i, value := range values {
if i != 0 {
builder.WriteString(", ")
}
builder.WriteString(value.Debug())
}
builder.WriteRune(']')
return builder.String()
}
func TestSubexMain(t *testing.T) {
type test struct {
subex string
input []walk.Value
expected []walk.Value
}
tests := []test {
{
subex: `..+`,
input: []walk.Value {
walk.NumberValue(12),
walk.NumberValue(34),
},
expected: []walk.Value {
walk.NumberValue(46),
},
},
{
subex: `.`,
input: []walk.Value {
walk.MapValue {{
Key: "a",
Value: walk.StringValue("b"),
}},
},
expected: []walk.Value {
walk.MapValue {{
Key: "a",
Value: walk.StringValue("b"),
}},
},
},
{
subex: `~(.$_(.{-0}))~`,
input: []walk.Value {
walk.StringValue("hello"),
},
expected: []walk.Value {
walk.StringValue("ello"),
},
},
}
for _, test := range tests {
lexer := NewStringRuneReader(test.subex)
ast := Parse(lexer)
transducer := CompileTransducer(ast)
output, err := RunTransducer(transducer, test.input)
if err {
t.Errorf("Subex %q rejected input %v", test.subex, fmtValueList(test.input))
t.Logf("AST: %v", ast)
continue
}
if !reflect.DeepEqual(output, test.expected) {
t.Errorf("Subex %q transformed input %s to output %s", test.subex, fmtValueList(test.input), fmtValueList(output))
}
}
}
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