Add tests for undefined types

tests/compiler/circuits/unknown_member_type_fail.leo

@@ -0,0 +1,14 @@
+/*
+namespace: Compile
+expectation: Fail
+*/
+
+circuit Foo {
+    a: u8,
+    bar: Bar,
+}
+
+@program
+function main(a: u8) -> u8 {
+    return a + 1u8;
+}

tests/compiler/function/unknown_parameter_type_fail.leo

@@ -0,0 +1,14 @@
+/*
+namespace: Compile
+expectation: Fail
+*/
+
+@program
+function main(a: u8, foo: Foo) -> u8 {
+    return a;
+}
+
+@program
+function returns_foo(a: u8) -> Foo {
+    return a;
+}

tests/compiler/statements/unknown_type_in_definition_fail.leo

@@ -0,0 +1,11 @@
+/*
+namespace: Compile
+expectation: Fail
+input_file: inputs/dummy.in
+*/
+
+@program
+function main(k: bool) -> bool {
+	let b: Foo = 1u8;
+    return k == true;
+}

tests/expectations/compiler/circuits/unknown_member_type_fail.out

@@ -0,0 +1,5 @@
+---
+namespace: Compile
+expectation: Fail
+outputs:
+  - "Error [ETYC0372017]: The type `Bar` is not found in the current scope.\n    --> compiler-test:3:1\n     |\n   3 | circuit Foo {\n   4 |     a: u8,\n   5 |     bar: Bar,\n   6 | }\n     | ^\n"

tests/expectations/compiler/function/unknown_parameter_type_fail.out

@@ -0,0 +1,5 @@
+---
+namespace: Compile
+expectation: Fail
+outputs:
+  - "Error [ETYC0372017]: The type `Foo` is not found in the current scope.\n    --> compiler-test:4:22\n     |\n   4 | function main(a: u8, foo: Foo) -> u8 {\n     |                      ^^^\nError [ETYC0372003]: Expected type `circuit Foo` but type `u8` was found\n    --> compiler-test:9:22\n     |\n   9 | function returns_foo(a: u8) -> Foo {\n     |                      ^\nError [ETYC0372017]: The type `Foo` is not found in the current scope.\n    --> compiler-test:9:1\n     |\n   9 | function returns_foo(a: u8) -> Foo {\n  10 |     return a;\n  11 | }\n     | ^\n"

tests/expectations/compiler/statements/unknown_type_in_definition_fail.out

@@ -0,0 +1,5 @@
+---
+namespace: Compile
+expectation: Fail
+outputs:
+  - "Error [ETYC0372017]: The type `Foo` is not found in the current scope.\n    --> compiler-test:5:2\n     |\n   5 | \tlet b: Foo = 1u8;\n     |  ^^^^^^^^^^^^^^^^\nError [ETYC0372003]: Expected type `circuit Foo` but type `u8` was found\n    --> compiler-test:5:15\n     |\n   5 | \tlet b: Foo = 1u8;\n     |               ^^^\n"