Add wallet balance subcommand

src/subcommand/wallet.rs

@@ -1,5 +1,6 @@
 use super::*;
 
+mod balance;
 mod fund;
 mod init;
 mod utxos;
@@ -54,16 +55,18 @@ fn get_wallet(options: Options) -> Result<bdk::wallet::Wallet<SqliteDatabase>> {
 
 #[derive(Debug, Parser)]
 pub(crate) enum Wallet {
-  Init,
+  Balance,
   Fund,
+  Init,
   Utxos,
 }
 
 impl Wallet {
   pub(crate) fn run(self, options: Options) -> Result {
     match self {
-      Self::Init => init::run(options),
+      Self::Balance => balance::run(options),
       Self::Fund => fund::run(options),
+      Self::Init => init::run(options),
       Self::Utxos => utxos::run(options),
     }
   }

src/subcommand/wallet/balance.rs

@@ -0,0 +1,6 @@
+use super::*;
+
+pub(crate) fn run(options: Options) -> Result {
+  println!("{}", get_wallet(options)?.get_balance()?);
+  Ok(())
+}

tests/wallet.rs

@@ -140,3 +140,47 @@ fn utxos() {
     .stdout_regex("^[[:xdigit:]]{64}:0 5000000000\n")
     .run()
 }
+
+#[test]
+fn balance() {
+  let state = Test::new()
+    .command("--network regtest wallet init")
+    .expected_status(0)
+    .expected_stderr("Wallet initialized.\n")
+    .output()
+    .state;
+
+  let state = Test::with_state(state)
+    .command("--network regtest wallet balance")
+    .expected_status(0)
+    .expected_stdout("0\n")
+    .output()
+    .state;
+
+  let output = Test::with_state(state)
+    .command("--network regtest wallet fund")
+    .stdout_regex("^bcrt1.*\n")
+    .output();
+
+  output
+    .state
+    .client
+    .generate_to_address(
+      101,
+      &Address::from_str(
+        output
+          .stdout
+          .strip_suffix('\n')
+          .ok_or("Failed to strip suffix")
+          .unwrap(),
+      )
+      .unwrap(),
+    )
+    .unwrap();
+
+  Test::with_state(output.state)
+    .command("--network regtest wallet balance")
+    .expected_status(0)
+    .expected_stdout("5000000000\n")
+    .run()
+}