1 files changed, 65 insertions, 0 deletions
diff --git a/feed/dataversion_test.go b/feed/dataversion_test.go
new file mode 100644
index 0000000..6bf683c
--- /dev/null
+++ b/feed/dataversion_test.go
@@ -0,0 +1,65 @@
+package feed
+
+import (
+  "encoding/json"
+  "testing"
+)
+
+func TestDataVersionUnmarshalInvalidData(t *testing.T) {
+  test := []byte(`{}`)
+  var val DataVersion
+
+  if err := json.Unmarshal(test, &val); err == nil {
+    t.Errorf("got \"%s\", exp error", val)
+  }
+}
+
+func TestDataVersionUnmarshalUnknown(t *testing.T) {
+  test := []byte(`"foo"`)
+  exp := "unknown data version: foo"
+  var val DataVersion
+
+  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 TestDataVersionUnmarshalValid(t *testing.T) {
+  test := []byte(`"4.0"`)
+  exp := V40
+  var got DataVersion
+
+  if err := json.Unmarshal(test, &got); err != nil {
+    t.Error(err)
+    return
+  }
+
+  if got != exp {
+    t.Errorf("got \"%s\", exp \"%s\"", got, exp)
+  }
+}
+
+func TestDataVersionString(t *testing.T) {
+  tests := []struct {
+    val DataVersion
+    exp string
+  } {
+    { V40, "4.0" },
+    { DataVersion(255), "DataVersion(255)" },
+  }
+
+  for _, test := range(tests) {
+    t.Run(test.val.String(), func(t *testing.T) {
+      got := test.val.String()
+      if got != test.exp {
+        t.Errorf("got \"%s\", exp \"%s\"", got, test.exp)
+      }
+    })
+  }
+}