Add tests for assertion_on_constants macro check

Author: flip1995

tests/ui/assertions_on_constants.rs

@@ -1,3 +1,9 @@
+macro_rules! assert_const {
+    ($len:expr) => {
+        assert!($len > 0);
+    }
+}
+
 fn main() {
     assert!(true);
     assert!(false);
@@ -9,4 +15,7 @@ fn main() {
 
     const C: bool = false;
     assert!(C);
+
+    assert_const!(3);
+    assert_const!(-1);
 }

tests/ui/assertions_on_constants.stderr

@@ -1,5 +1,5 @@
 error: assert!(true) will be optimized out by the compiler
-  --> $DIR/assertions_on_constants.rs:2:5
+  --> $DIR/assertions_on_constants.rs:8:5
    |
 LL |     assert!(true);
    |     ^^^^^^^^^^^^^^
@@ -8,39 +8,39 @@ LL |     assert!(true);
    = help: remove it
 
 error: assert!(false) should probably be replaced
-  --> $DIR/assertions_on_constants.rs:3:5
+  --> $DIR/assertions_on_constants.rs:9:5
    |
 LL |     assert!(false);
    |     ^^^^^^^^^^^^^^^
    |
    = help: use panic!() or unreachable!()
 
 error: assert!(true) will be optimized out by the compiler
-  --> $DIR/assertions_on_constants.rs:4:5
+  --> $DIR/assertions_on_constants.rs:10:5
    |
 LL |     assert!(true, "true message");
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: remove it
 
 error: assert!(false) should probably be replaced
-  --> $DIR/assertions_on_constants.rs:5:5
+  --> $DIR/assertions_on_constants.rs:11:5
    |
 LL |     assert!(false, "false message");
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: use panic!() or unreachable!()
 
 error: assert!(const: true) will be optimized out by the compiler
-  --> $DIR/assertions_on_constants.rs:8:5
+  --> $DIR/assertions_on_constants.rs:14:5
    |
 LL |     assert!(B);
    |     ^^^^^^^^^^^
    |
    = help: remove it
 
 error: assert!(const: false) should probably be replaced
-  --> $DIR/assertions_on_constants.rs:11:5
+  --> $DIR/assertions_on_constants.rs:17:5
    |
 LL |     assert!(C);
    |     ^^^^^^^^^^^