Add tests for using LocatorExpression out of place

compiler/parser/src/parser/expression.rs

@@ -17,7 +17,7 @@
 use super::*;
 use leo_errors::{ParserError, Result};
 
-use leo_span::{sym, Symbol};
+use leo_span::sym;
 use snarkvm::console::{account::Address, network::Testnet3};
 
 const INT_TYPES: &[Token] = &[

tests/expectations/compiler/mappings/locator_expression_fail.out

@@ -0,0 +1,5 @@
+---
+namespace: Compile
+expectation: Fail
+outputs:
+  - "Error [ETYC0372005]: Unknown variable `users`\n    --> compiler-test:7:22\n     |\n   7 |         let a: u32 = relay.aleo/users;\n     |                      ^^^^^^^^^^^^^^^^\nError [ETYC0372005]: Unknown variable `users`\n    --> compiler-test:11:35\n     |\n  11 |         let a:bool = Mapping::get(relay.aleo/users, addr);\n     |                                   ^^^^^^^^^^^^^^^^\n"

tests/expectations/parser/program/locator_expression_fail.out

@@ -0,0 +1,5 @@
+---
+namespace: Parse
+expectation: Fail
+outputs:
+  - "Error [EPAR0370005]: expected 'address', 'bool', 'field', 'group', 'scalar', 'signature', 'string', 'i8', 'i16', 'i32', 'i64', 'i128', 'u8', 'u16', 'u32', 'u64', 'u128' -- found 'mapping'\n    --> test:7:16\n     |\n   7 |         let a: mapping = relay.aleo/users;\n     |                ^^^^^^^"

tests/tests/compiler/mappings/locator_expression_fail.leo

@@ -0,0 +1,16 @@
+/*
+namespace: Compile
+expectation: Fail
+*/
+
+program relay.aleo {
+    mapping users: address => bool;
+
+    transition send(addr: address) {
+        let a: u32 = relay.aleo/users;
+        return then finalize(addr);
+    }
+    finalize send(addr: address) {
+        let a:bool = Mapping::get(relay.aleo/users, addr);
+    }
+}

tests/tests/parser/program/locator_expression_fail.leo

@@ -0,0 +1,16 @@
+/*
+namespace: Parse
+expectation: Fail
+*/
+
+program relay.aleo {
+    mapping users: address => bool;
+
+    transition send(addr: address) {
+        let a: mapping = relay.aleo/users;
+        return then finalize(addr);
+    }
+    finalize send(addr: address) {
+        let a:bool = Mapping::get(relay.aleo/users, addr);
+    }
+}