test: Add small miscellaneous tests

This patch extends various packages and integration tests, increasing
test coverage. They're small enough that it's not worth splitting them
up, as it would add a lot of noise to the history.

internal/tlsconst/tlsconst_test.go

@@ -0,0 +1,37 @@
+package tlsconst
+
+import "testing"
+
+func TestVersionName(t *testing.T) {
+	cases := []struct {
+		ver      uint16
+		expected string
+	}{
+		{0x0302, "TLS-1.1"},
+		{0x1234, "TLS-0x1234"},
+	}
+	for _, c := range cases {
+		got := VersionName(c.ver)
+		if got != c.expected {
+			t.Errorf("VersionName(%x) = %q, expected %q",
+				c.ver, got, c.expected)
+		}
+	}
+}
+
+func TestCipherSuiteName(t *testing.T) {
+	cases := []struct {
+		suite    uint16
+		expected string
+	}{
+		{0xc073, "TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384"},
+		{0x1234, "TLS_UNKNOWN_CIPHER_SUITE-0x1234"},
+	}
+	for _, c := range cases {
+		got := CipherSuiteName(c.suite)
+		if got != c.expected {
+			t.Errorf("CipherSuiteName(%x) = %q, expected %q",
+				c.suite, got, c.expected)
+		}
+	}
+}