migrate syft/cataloger to syft/pkg/cataloger

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

syft/pkg/cataloger/common/generic_cataloger_test.go

@@ -0,0 +1,73 @@
+package common
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"testing"
+
+	"github.com/anchore/syft/syft/pkg"
+	"github.com/anchore/syft/syft/source"
+)
+
+func parser(_ string, reader io.Reader) ([]pkg.Package, error) {
+	contents, err := ioutil.ReadAll(reader)
+	if err != nil {
+		panic(err)
+	}
+	return []pkg.Package{
+		{
+			Name: string(contents),
+		},
+	}, nil
+}
+
+func TestGenericCataloger(t *testing.T) {
+
+	globParsers := map[string]ParserFn{
+		"**a-path.txt": parser,
+	}
+	pathParsers := map[string]ParserFn{
+		"test-fixtures/another-path.txt": parser,
+		"test-fixtures/last/path.txt":    parser,
+	}
+	upstream := "some-other-cataloger"
+
+	expectedSelection := []string{"test-fixtures/last/path.txt", "test-fixtures/another-path.txt", "test-fixtures/a-path.txt"}
+	resolver := source.NewMockResolverForPaths(expectedSelection...)
+	cataloger := NewGenericCataloger(pathParsers, globParsers, upstream)
+
+	expectedPkgs := make(map[string]pkg.Package)
+	for _, path := range expectedSelection {
+		expectedPkgs[path] = pkg.Package{
+			FoundBy: upstream,
+			Name:    fmt.Sprintf("%s file contents!", path),
+		}
+	}
+
+	actualPkgs, err := cataloger.Catalog(resolver)
+	if err != nil {
+		t.Fatalf("cataloger catalog action failed: %+v", err)
+	}
+
+	if len(actualPkgs) != len(expectedPkgs) {
+		t.Fatalf("unexpected packages len: %d", len(actualPkgs))
+	}
+
+	for _, p := range actualPkgs {
+		ref := p.Locations[0]
+		exP, ok := expectedPkgs[ref.RealPath]
+		if !ok {
+			t.Errorf("missing expected pkg: ref=%+v", ref)
+			continue
+		}
+
+		if p.FoundBy != exP.FoundBy {
+			t.Errorf("bad upstream: %s", p.FoundBy)
+		}
+
+		if exP.Name != p.Name {
+			t.Errorf("bad contents mapping: %+v", p.Locations)
+		}
+	}
+}