4 files changed, 153 insertions, 31 deletions
diff --git a/internal/feed/feed.go b/internal/feed/feed.go
index 38a7767..4b18b9d 100644
--- a/internal/feed/feed.go
+++ b/internal/feed/feed.go
@@ -29,36 +29,6 @@ const (
 
 // TODO: parse cpe
 
-// CVSS privileges required
-type PrivilegesRequired int
-
-// Unmarshal CVSS privileges required from JSON.
-func (me *PrivilegesRequired) UnmarshalJSON(b []byte) error {
-  // decode string, check for error
-  var s string
-  if err := json.Unmarshal(b, &s); err != nil {
-    return err
-  }
-
-  // check value
-  switch s {
-  case "NONE":
-    *me = None
-  case "LOW":
-    *me = Low
-  case "MEDIUM":
-    *me = Medium
-  case "HIGH":
-    *me = High
-  default:
-    // return error
-    return fmt.Errorf("unknown privileges required: %s", s)
-  }
-
-  // return success
-  return nil
-}
-
 // CVSS user interaction
 type UserInteraction int
 
@@ -459,7 +429,7 @@ type CvssV3 struct {
   AttackComplexity V3AttackComplexity `json:"attackComplexity"`
 
   // privileges required
-  PrivilegesRequired PrivilegesRequired `json:"privilegesRequired"`
+  PrivilegesRequired V3PrivilegesRequired `json:"privilegesRequired"`
 
   // user interaction
   UserInteraction UserInteraction `json:"userInteraction"`
diff --git a/internal/feed/v3privilegesrequired.go b/internal/feed/v3privilegesrequired.go
new file mode 100644
index 0000000..3e69334
--- /dev/null
+++ b/internal/feed/v3privilegesrequired.go
@@ -0,0 +1,45 @@
+package feed
+
+//go:generate stringer -linecomment -type=V3PrivilegesRequired
+
+import (
+  "encoding/json"
+  "fmt"
+)
+
+// CVSS v3 privileges required.
+type V3PrivilegesRequired byte
+
+const (
+  V3PRNone V3PrivilegesRequired = iota // NONE
+  V3PRLow // LOW
+  V3PRMedium // MEDIUM
+  V3PRHigh // HIGH
+)
+
+// Unmarshal CVSS privileges required from JSON.
+func (me *V3PrivilegesRequired) UnmarshalJSON(b []byte) error {
+  // decode string, check for error
+  var s string
+  if err := json.Unmarshal(b, &s); err != nil {
+    return err
+  }
+
+  // check value
+  switch s {
+  case "NONE":
+    *me = V3PRNone
+  case "LOW":
+    *me = V3PRLow
+  case "MEDIUM":
+    *me = V3PRMedium
+  case "HIGH":
+    *me = V3PRHigh
+  default:
+    // return error
+    return fmt.Errorf("unknown CVSS v3 privileges required: %s", s)
+  }
+
+  // return success
+  return nil
+}
diff --git a/internal/feed/v3privilegesrequired_string.go b/internal/feed/v3privilegesrequired_string.go
new file mode 100644
index 0000000..2951a64
--- /dev/null
+++ b/internal/feed/v3privilegesrequired_string.go
@@ -0,0 +1,26 @@
+// Code generated by "stringer -linecomment -type=V3PrivilegesRequired"; DO NOT EDIT.
+
+package feed
+
+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[V3PRNone-0]
+	_ = x[V3PRLow-1]
+	_ = x[V3PRMedium-2]
+	_ = x[V3PRHigh-3]
+}
+
+const _V3PrivilegesRequired_name = "NONELOWMEDIUMHIGH"
+
+var _V3PrivilegesRequired_index = [...]uint8{0, 4, 7, 13, 17}
+
+func (i V3PrivilegesRequired) String() string {
+	if i >= V3PrivilegesRequired(len(_V3PrivilegesRequired_index)-1) {
+		return "V3PrivilegesRequired(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _V3PrivilegesRequired_name[_V3PrivilegesRequired_index[i]:_V3PrivilegesRequired_index[i+1]]
+}
diff --git a/internal/feed/v3privilegesrequired_test.go b/internal/feed/v3privilegesrequired_test.go
new file mode 100644
index 0000000..f200ed1
--- /dev/null
+++ b/internal/feed/v3privilegesrequired_test.go
@@ -0,0 +1,81 @@
+package feed
+
+import (
+  "encoding/json"
+  "testing"
+)
+
+func TestV3PrivilegesRequiredUnmarshalInvalidData(t *testing.T) {
+  test := []byte(`{}`)
+  var val V3PrivilegesRequired
+
+  if err := json.Unmarshal(test, &val); err == nil {
+    t.Errorf("got \"%s\", exp error", val)
+  }
+}
+
+func TestV3PrivilegesRequiredUnmarshalUnknown(t *testing.T) {
+  test := []byte(`"foo"`)
+  exp := "unknown CVSS v3 privileges required: foo"
+  var val V3PrivilegesRequired
+
+  err := json.Unmarshal(test, &val)
+  if err == nil {
+    t.Errorf("got \"%s\", exp error", val)
+    return
+  }
+
+  if err.Error() != exp {
+    t.Errorf("got \"%s\", exp \"%s\"", err.Error(), exp)
+  }
+}
+
+func TestV3PrivilegesRequiredUnmarshalValid(t *testing.T) {
+  tests := []struct {
+    val string
+    exp V3PrivilegesRequired
+  } {
+    { "\"NONE\"", V3PRNone },
+    { "\"LOW\"", V3PRLow },
+    { "\"MEDIUM\"", V3PRMedium },
+    { "\"HIGH\"", V3PRHigh },
+  }
+
+  for _, test := range(tests) {
+    t.Run(test.val, func(t *testing.T) {
+      var got V3PrivilegesRequired
+      if err := json.Unmarshal([]byte(test.val), &got); err != nil {
+        t.Error(err)
+        return
+      }
+
+      if got != test.exp {
+        t.Errorf("got \"%s\", exp \"%s\"", got, test.exp)
+      }
+    })
+  }
+}
+
+func TestV3PrivilegesRequiredString(t *testing.T) {
+  tests := []struct {
+    val V3PrivilegesRequired
+    exp string
+  } {
+    { V3PRNone, "NONE" },
+    { V3PRLow, "LOW" },
+    { V3PRMedium, "MEDIUM" },
+    { V3PRHigh, "HIGH" },
+
+    { V3PrivilegesRequired(255), "V3PrivilegesRequired(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)
+      }
+    })
+  }
+}