3 files changed, 69 insertions, 0 deletions
diff --git a/cvss/severity.go b/cvss/severity.go
new file mode 100644
index 0000000..88df96a
--- /dev/null
+++ b/cvss/severity.go
@@ -0,0 +1,16 @@
+package cvss
+
+type Rating byte
+
+//go:generate stringer -linecomment -type=Severity
+
+// CVSS score severity rating.
+type Severity byte
+
+const (
+  None Severity = iota // None
+  Low // Low
+  Medium // Medium
+  High // High
+  Critical // Critical
+)
diff --git a/cvss/severity_string.go b/cvss/severity_string.go
new file mode 100644
index 0000000..8155fa2
--- /dev/null
+++ b/cvss/severity_string.go
@@ -0,0 +1,27 @@
+// Code generated by "stringer -linecomment -type=Severity"; DO NOT EDIT.
+
+package cvss
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[None-0]
+	_ = x[Low-1]
+	_ = x[Medium-2]
+	_ = x[High-3]
+	_ = x[Critical-4]
+}
+
+const _Severity_name = "NoneLowMediumHighCritical"
+
+var _Severity_index = [...]uint8{0, 4, 7, 13, 17, 25}
+
+func (i Severity) String() string {
+	if i >= Severity(len(_Severity_index)-1) {
+		return "Severity(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _Severity_name[_Severity_index[i]:_Severity_index[i+1]]
+}
diff --git a/cvss/severity_test.go b/cvss/severity_test.go
new file mode 100644
index 0000000..632736d
--- /dev/null
+++ b/cvss/severity_test.go
@@ -0,0 +1,26 @@
+package cvss
+
+import "testing"
+
+func TestSeverityString(t *testing.T) {
+  tests := []struct {
+    val Severity
+    exp string
+  } {
+    { None, "None" },
+    { Low, "Low" },
+    { Medium, "Medium" },
+    { High, "High" },
+    { Critical, "Critical" },
+    { Severity(255), "Severity(255)" },
+  }
+
+  for _, test := range(tests) {
+    t.Run(test.exp, func(t *testing.T) {
+      got := test.val.String()
+      if got != test.exp {
+        t.Errorf("got \"%s\", exp \"%s\"", got, test.exp)
+      }
+    })
+  }
+}