add default table presenter

syft/presenter/table/presenter_test.go

@@ -0,0 +1,68 @@
+package table
+
+import (
+	"bytes"
+	"flag"
+	"testing"
+
+	"github.com/anchore/go-testutils"
+	"github.com/anchore/stereoscope/pkg/file"
+	"github.com/anchore/syft/syft/pkg"
+	"github.com/anchore/syft/syft/scope"
+	"github.com/sergi/go-diff/diffmatchpatch"
+)
+
+var update = flag.Bool("update", false, "update the *.golden files for table presenters")
+
+func TestTablePresenter(t *testing.T) {
+	var buffer bytes.Buffer
+
+	testImage := "image-simple"
+
+	catalog := pkg.NewCatalog()
+	img, cleanup := testutils.GetFixtureImage(t, "docker-archive", testImage)
+	defer cleanup()
+
+	// populate catalog with test data
+	catalog.Add(pkg.Package{
+		Name:    "package-1",
+		Version: "1.0.1",
+		Source: []file.Reference{
+			*img.SquashedTree().File("/somefile-1.txt"),
+		},
+		Type: pkg.DebPkg,
+	})
+	catalog.Add(pkg.Package{
+		Name:    "package-2",
+		Version: "2.0.1",
+		Source: []file.Reference{
+			*img.SquashedTree().File("/somefile-2.txt"),
+		},
+		Type: pkg.DebPkg,
+	})
+
+	s, err := scope.NewScopeFromImage(img, scope.AllLayersScope)
+	pres := NewPresenter(catalog, s)
+
+	// run presenter
+	err = pres.Present(&buffer)
+	if err != nil {
+		t.Fatal(err)
+	}
+	actual := buffer.Bytes()
+
+	if *update {
+		testutils.UpdateGoldenFileContents(t, actual)
+	}
+
+	var expected = testutils.GetGoldenFileContents(t)
+
+	if !bytes.Equal(expected, actual) {
+		dmp := diffmatchpatch.New()
+		diffs := dmp.DiffMain(string(actual), string(expected), true)
+		t.Errorf("mismatched output:\n%s", dmp.DiffPrettyText(diffs))
+	}
+
+	// TODO: add me back in when there is a JSON schema
+	// validateAgainstV1Schema(t, string(actual))
+}