Harvest univers conformance fixtures

Makefile

@@ -1,4 +1,7 @@
-.PHONY: harvest
+.PHONY: diff-univers harvest
+
+diff-univers:
+	go run ./tools/diff-univers $(DIFF_UNIVERS_ARGS)
 
 harvest:
 	go run ./tools/harvest $(HARVEST_ARGS)

advisory_test.go

@@ -0,0 +1,36 @@
+package vers
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+type npmAdvisoryRange struct {
+	TestIndex int    `json:"test_index"`
+	Native    string `json:"npm_native"`
+}
+
+func TestNPMAdvisoryRangesParse(t *testing.T) {
+	filename := filepath.Join("testdata", "local", "data", "npm_advisory.json")
+	data, err := os.ReadFile(filename)
+	if err != nil {
+		t.Fatalf("read %s: %v", filename, err)
+	}
+	var ranges []npmAdvisoryRange
+	if err := json.Unmarshal(data, &ranges); err != nil {
+		t.Fatalf("parse %s: %v", filename, err)
+	}
+	if len(ranges) == 0 {
+		t.Fatalf("%s contains no ranges", filename)
+	}
+	for _, advisoryRange := range ranges {
+		t.Run(fmt.Sprintf("%04d", advisoryRange.TestIndex), func(t *testing.T) {
+			if _, err := ParseNative(advisoryRange.Native, schemeNPM); err != nil {
+				t.Errorf("ParseNative(%q, npm): %v", advisoryRange.Native, err)
+			}
+		})
+	}
+}