Started work on proper tests.

STILL HAVING STUPID UNEXPLAINABLE NIL POINTERS.

squashfs_test.go

@@ -0,0 +1,93 @@
+package squashfs_test
+
+import (
+	"io"
+	"io/fs"
+	"net/http"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"testing"
+
+	"github.com/CalebQ42/squashfs"
+)
+
+const (
+	squashfsURL  = "https://darkstorm.tech/LinuxPATest.sfs"
+	squashfsName = "LinuxPATest.sfs"
+)
+
+func preTest(dir string) (fil *os.File, err error) {
+	_, err = os.Open(filepath.Join(dir, squashfsName))
+	if err != nil {
+		_, err = os.Open(dir)
+		if os.IsNotExist(err) {
+			err = os.Mkdir(dir, 0755)
+		}
+		if err != nil {
+			return
+		}
+		os.Remove(filepath.Join(dir, squashfsName))
+		fil, err = os.Create(filepath.Join(dir, squashfsName))
+		if err != nil {
+			return
+		}
+		var resp *http.Response
+		resp, err = http.DefaultClient.Get(squashfsURL)
+		if err != nil {
+			return
+		}
+		_, err = io.Copy(fil, resp.Body)
+		if err != nil {
+			return
+		}
+	}
+	_, err = exec.LookPath("unsquashfs")
+	if err != nil {
+		return
+	}
+	_, err = exec.LookPath("mksquashfs")
+	return
+}
+
+func TestExtractQuick(t *testing.T) {
+
+	//First, setup everything and extract the archive using the library and unsquashfs
+
+	tmpDir := t.TempDir()
+	fil, err := preTest(tmpDir)
+	if err != nil {
+		t.Fatal(err)
+	}
+	libPath := filepath.Join(tmpDir, "ExtractLib")
+	unsquashPath := filepath.Join(tmpDir, "ExtractSquashfs")
+	os.Remove(libPath)
+	os.Remove(unsquashPath)
+	rdr, err := squashfs.NewReader(fil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = rdr.ExtractTo(libPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	cmd := exec.Command("unsquashfs", "-d", unsquashPath, fil.Name())
+	err = cmd.Run()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	//Then compare the sizes and existance between the two (using unsquashfs as a reference).
+	//If the file doesn't exist, or the size is different, we exit.
+	//TODO: Add long test that checks contents.
+
+	squashFils := os.DirFS(unsquashPath)
+	err = fs.WalkDir(squashFils, "", func(path string, d fs.DirEntry, err error) error {
+		t.Log(path)
+		return nil
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Fatal("This is a test")
+}