tests: Add browser WASM tests for evm_client

evm_client/tests/balance.rs

@@ -0,0 +1,69 @@
+use evm_client::{EvmClient, EvmProvider, Signer};
+
+// Dummy signer that returns a known Ethereum address (Vitalik's address)
+struct DummySigner;
+
+#[cfg(not(target_arch = "wasm32"))]
+#[async_trait::async_trait]
+impl Signer for DummySigner {
+    async fn sign(&self, _message: &[u8]) -> Result<Vec<u8>, evm_client::EvmError> {
+        Err(evm_client::EvmError::Vault("sign not implemented".to_string()))
+    }
+    fn address(&self) -> String {
+        // Vitalik's main address (has funds on mainnet)
+        "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045".to_string()
+    }
+}
+
+#[cfg(not(target_arch = "wasm32"))]
+#[tokio::test]
+async fn test_get_balance_vitalik() {
+    // Use a public Ethereum mainnet RPC
+    let provider = EvmProvider::Http {
+        name: "mainnet".to_string(),
+        url: "https://eth.drpc.org".to_string(),
+        chain_id: 1,
+    };
+    let signer = DummySigner;
+    let mut client = EvmClient::new(signer);
+    client.add_provider("mainnet".to_string(), provider);
+    client.set_current("mainnet").unwrap();
+    let balance = client.get_balance("0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045").await.unwrap();
+    assert!(balance > 0, "Vitalik's balance should be greater than zero");
+}
+
+#[cfg(target_arch = "wasm32")]
+use wasm_bindgen_test::*;
+
+#[cfg(target_arch = "wasm32")]
+#[async_trait::async_trait(?Send)]
+impl Signer for DummySigner {
+    async fn sign(&self, _message: &[u8]) -> Result<Vec<u8>, evm_client::EvmError> {
+        Err(evm_client::EvmError::Vault("sign not implemented".to_string()))
+    }
+    fn address(&self) -> String {
+        // Vitalik's main address (has funds on mainnet)
+        "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045".to_string()
+    }
+}
+
+#[cfg(target_arch = "wasm32")]
+wasm_bindgen_test::wasm_bindgen_test_configure!(run_in_browser);
+
+#[cfg(target_arch = "wasm32")]
+#[wasm_bindgen_test(async)]
+async fn test_get_balance_vitalik_browser() {
+    let provider = EvmProvider::Http {
+        name: "mainnet".to_string(),
+        url: "https://eth.drpc.org".to_string(),
+        chain_id: 1,
+    };
+    let signer = DummySigner;
+    let mut client = EvmClient::new(signer);
+    client.add_provider("mainnet".to_string(), provider);
+    client.set_current("mainnet").unwrap();
+    let balance = client.get_balance("0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045").await;
+    assert!(balance.is_ok(), "Balance query should succeed in browser");
+    let balance = balance.unwrap();
+    assert!(balance > 0u128, "Vitalik's balance should be greater than zero");
+}