add test

cli/cli.go

@@ -129,6 +129,11 @@ func (c *CLI) run(target string, debug bool, bufSize int64) int {
 
 		bb := (*[256]byte)(unsafe.Pointer(&dirent.Name[0]))
 		name := string(bb[0:blen(*bb)])
+
+		if name == "." || name == ".." {
+			// ignore
+			continue
+		}
 		fmt.Fprintln(c.outStream, name)
 	}
 

cli/cli_test.go

@@ -0,0 +1,45 @@
+package cli
+
+import (
+	"bytes"
+	"os"
+	"sort"
+	"strings"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func TestRun_Success(t *testing.T) {
+	outStream, errStream := new(bytes.Buffer), new(bytes.Buffer)
+	cl := NewCLI(outStream, errStream)
+	target := "testdata"
+	status := cl.run(target, false, 0)
+	if status != ExitCodeOK {
+		t.Errorf("ExitStatus=%d, want %d", status, ExitCodeOK)
+	}
+	actualList := strings.Split(outStream.String(), "\n")
+	// last element is unused
+	actualList = actualList[:len(actualList)-1]
+	expectedList := dirList(t, target)
+	sort.Slice(actualList, func(i, j int) bool { return actualList[i] < actualList[j] })
+
+	if diff := cmp.Diff(actualList, expectedList); diff != "" {
+		t.Errorf("file list mismatch (-actual +expected):\n%s", diff)
+	}
+}
+
+func dirList(t *testing.T, target string) []string {
+	files, err := os.ReadDir(target)
+	if err != nil {
+		t.Error(err)
+	}
+
+	names := make([]string, 0, len(files))
+
+	for _, file := range files {
+		names = append(names, file.Name())
+	}
+
+	return names
+}

go.mod

@@ -1,3 +1,5 @@
 module github.com/catatsuy/lls
 
 go 1.17
+
+require github.com/google/go-cmp v0.5.6

go.sum

@@ -0,0 +1,4 @@
+github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
+github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=