derivekey: add test TestDeriveKeyXprv

This test checks that "chantools derivekey --rootkey xpriv..." works.

Author: starius

cmd/chantools/derivekey_test.go

@@ -82,3 +82,23 @@ func TestDeriveKeySeedBip39(t *testing.T) {
 
 	h.assertLogContains(keyContentBIP39)
 }
+
+func TestDeriveKeyXprv(t *testing.T) {
+	h := newHarness(t)
+
+	// Derive a specific key from xprv.
+	derive := &deriveKeyCommand{
+		Path: testPath,
+		rootKey: &rootKey{
+			RootKey: "xprv9s21ZrQH143K3QTDL4LXw2F7HEK3wJUD2nW2nR" +
+				"k4stbPy6cq3jPPqjiChkVvvNKmPGJxWUtg6LnF5kejM" +
+				"RNNU3TGtRBeJgk33yuGBxrMPHi",
+		},
+	}
+
+	err := derive.Execute(nil, nil)
+	require.NoError(t, err)
+
+	h.assertLogContains("cQcdieZy2d1TAdCsa5MjmHJs2gdHcD7x22nDbhJyVTUa3Ax" +
+		"5KB3w")
+}