update cataloger tests to use pkgtest utils (#1287)

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

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

syft/pkg/cataloger/cpp/parse_conanlock_test.go

@@ -1,22 +1,22 @@
 package cpp
 
 import (
-	"os"
 	"testing"
 
-	"github.com/go-test/deep"
-	"github.com/stretchr/testify/require"
-
+	"github.com/anchore/syft/syft/artifact"
 	"github.com/anchore/syft/syft/pkg"
+	"github.com/anchore/syft/syft/pkg/cataloger/internal/pkgtest"
 	"github.com/anchore/syft/syft/source"
 )
 
 func TestParseConanlock(t *testing.T) {
+	fixture := "test-fixtures/conan.lock"
 	expected := []pkg.Package{
 		{
 			Name:         "zlib",
 			Version:      "1.2.12",
 			PURL:         "pkg:conan/zlib@1.2.12",
+			Locations:    source.NewLocationSet(source.NewLocation(fixture)),
 			Language:     pkg.CPP,
 			Type:         pkg.ConanPkg,
 			MetadataType: pkg.ConanLockMetadataType,
@@ -32,18 +32,8 @@ func TestParseConanlock(t *testing.T) {
 		},
 	}
 
-	fixture, err := os.Open("test-fixtures/conan.lock")
-	require.NoError(t, err)
+	// TODO: relationships are not under test
+	var expectedRelationships []artifact.Relationship
 
-	// TODO: no relationships are under test yet
-	actual, _, err := parseConanlock(nil, nil, source.LocationReadCloser{
-		Location:   source.NewLocation(fixture.Name()),
-		ReadCloser: fixture,
-	})
-	require.NoError(t, err)
-
-	differences := deep.Equal(expected, actual)
-	if differences != nil {
-		t.Errorf("returned package list differed from expectation: %+v", differences)
-	}
+	pkgtest.TestGenericParser(t, fixture, parseConanlock, expected, expectedRelationships)
 }