respond to authoratative CPEs from catalogers (#3166)

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

internal/task/package_task_factory_test.go

@@ -0,0 +1,55 @@
+package task
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/anchore/syft/syft/cpe"
+)
+
+func Test_hasAuthoritativeCPE(t *testing.T) {
+	tests := []struct {
+		name string
+		cpes []cpe.CPE
+		want bool
+	}{
+		{
+			name: "no cpes",
+			cpes: []cpe.CPE{},
+			want: false,
+		},
+		{
+			name: "no authoritative cpes",
+			cpes: []cpe.CPE{
+				{
+					Source: cpe.GeneratedSource,
+				},
+			},
+			want: false,
+		},
+		{
+			name: "has declared (authoritative) cpe",
+			cpes: []cpe.CPE{
+				{
+					Source: cpe.DeclaredSource,
+				},
+			},
+			want: true,
+		},
+		{
+			name: "has lookup (authoritative) cpe",
+			cpes: []cpe.CPE{
+				{
+					Source: cpe.NVDDictionaryLookupSource,
+				},
+			},
+			want: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.want, hasAuthoritativeCPE(tt.cpes))
+		})
+	}
+}