lnwire: add test cases for node alias validation

lnwire/node_announcement_test.go

@@ -0,0 +1,42 @@
+package lnwire
+
+import "testing"
+
+// TestNodeAliasValidation tests that the NewNodeAlias method will only accept
+// valid node announcements.
+func TestNodeAliasValidation(t *testing.T) {
+	t.Parallel()
+
+	var testCases = []struct {
+		alias string
+		valid bool
+	}{
+		// UTF-8 alias with valid length.
+		{
+			alias: "meruem",
+			valid: true,
+		},
+
+		// UTF-8 alias with invalid length.
+		{
+			alias: "p3kysxqr23swl33m6h5grmzddgw5nsgkky3g52zc6frpwz",
+			valid: false,
+		},
+
+		// String with non UTF-8 characters.
+		{
+			alias: "\xE0\x80\x80",
+			valid: false,
+		},
+	}
+	for i, testCase := range testCases {
+		_, err := NewNodeAlias(testCase.alias)
+		switch {
+		case err != nil && testCase.valid:
+			t.Fatalf("#%v: alias should have been invalid", i)
+
+		case err == nil && !testCase.valid:
+			t.Fatalf("#%v: invalid alias was missed", i)
+		}
+	}
+}