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package caesar
import (
"bytes"
"flag"
"io"
"io/ioutil"
"os"
"testing"
)
var customTests string
func TestMain(m *testing.M) {
flag.StringVar(&customTests, "custom", "", "input file for custom test cases")
flag.Parse()
os.Exit(m.Run())
}
func TestCustom(t *testing.T) {
if customTests == "" {
t.Skip("skipping custom tests")
}
f, err := os.Open(customTests)
if err != nil {
t.Fatalf("could not open custom test input: %v", err)
}
defer f.Close()
data, err := ioutil.ReadAll(f)
if err != nil {
t.Fatalf("could not read custom test input: %v", err)
}
buf := bytes.NewBuffer(data)
for {
// read input
inp, err := buf.ReadBytes(',')
if err == io.EOF {
return
} else if err != nil {
t.Fatalf("read error: %v", err)
}
// read expected output
exp, err := buf.ReadBytes('\n')
if err == io.EOF {
return
} else if err != nil {
t.Fatalf("read error: %v", err)
}
if len(inp) < 2 || len(exp) < 2 {
t.Fatalf("malformed input")
}
inString := string(inp[:len(inp)-1])
expectString := string(exp[:len(exp)-1])
t.Logf("encoding custom input %q, expecting %q", inString, expectString)
result := Encode(inString)
if result != expectString {
t.Logf("input: %s", inString)
t.Logf("output: %s", result)
t.Logf("expected: %s", expectString)
t.Fail()
}
}
Encode(string(data))
}
|
