Add ForeignCallError::Disabled and an integration test

compiler/noirc_printable_type/src/lib.rs

@@ -69,6 +69,9 @@ pub enum PrintableValueDisplay<F> {
 
 #[derive(Debug, Error)]
 pub enum ForeignCallError {
+    #[error("Attempted to call disabled foreign call `{0}`")]
+    Disabled(String),
+
     #[error("No handler could be found for foreign call `{0}`")]
     NoHandler(String),
 

test_programs/execution_failure/mocks_in_execution/Nargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "mocks_in_execution"
+type = "bin"
+authors = [""]
+compiler_version = ">=0.23.0"
+
+[dependencies]

test_programs/execution_failure/mocks_in_execution/src/main.nr

@@ -0,0 +1,5 @@
+fn main() {
+    // Trying to use a mock in `nargo execute` should fail.
+    let mock = unsafe { std::test::OracleMock::mock("foo") };
+    assert_eq(mock.id, 0);
+}

tooling/nargo/src/foreign_calls/mocker.rs

@@ -192,7 +192,8 @@ impl<F> ForeignCallExecutor<F> for DisabledMockForeignCallExecutor {
                 | ForeignCall::SetMockReturns
                 | ForeignCall::SetMockTimes
                 | ForeignCall::ClearMock => {
-                    panic!("unexpected mock call: {}", foreign_call.function)
+                    // Returning an error instead of panicking so this can be tested.
+                    return Err(ForeignCallError::Disabled(foreign_call.function.to_string()));
                 }
                 _ => {}
             }