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moon/lex_test.go

60 lines
1.3 KiB
Go

package moon
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strconv"
"strings"
"testing"
)
func runLexTest(t *testing.T, basepath, inpath, outpath string) {
in, err := os.Open(inpath)
if err != nil {
t.Errorf("unable to open input file %s: %s", inpath, err)
return
}
defer in.Close()
expected, err := ioutil.ReadFile(outpath)
if err != nil {
t.Errorf("unable to read expected output for %s: %s", outpath, err)
return
}
r_inpath := filepath.Base(inpath)
n, err := strconv.ParseInt(strings.TrimSuffix(r_inpath, ".in"), 10, 64)
if err != nil {
t.Errorf("unable to get test number for path %s: %s", inpath, err)
return
}
var buf bytes.Buffer
c := lex(in)
for t := range c {
fmt.Fprintln(&buf, t)
}
if !bytes.Equal(buf.Bytes(), expected) {
t.Logf("test %d: in: %s out: %s", n, inpath, outpath)
t.Errorf("lex output does not match expected result for test %d", n)
t.Logf("expected output:\n%s", expected)
t.Logf("received output:\n%s", buf.Bytes())
}
}
func TestLex(t *testing.T) {
files, err := filepath.Glob("tests/lex/*.in")
if err != nil {
t.Errorf("unable to find test files: %s", err)
return
}
for _, fname := range files {
runLexTest(t, "tests/lex/", fname, strings.Replace(fname, "in", "out", -1))
}
}