Clean up tests

tests/test_exercises/Cargo.toml

@@ -0,0 +1,11 @@
+bin = [
+  { name = "compilation_success", path = "exercises/compilation_success.rs" },
+  { name = "compilation_failure", path = "exercises/compilation_failure.rs" },
+  { name = "test_success", path = "exercises/test_success.rs" },
+  { name = "test_failure", path = "exercises/test_failure.rs" },
+]
+
+[package]
+name = "test_exercises"
+edition = "2021"
+publish = false

tests/test_exercises/exercises/compilation_failure.rs

@@ -0,0 +1,3 @@
+fn main() {
+    let
+}

tests/test_exercises/exercises/compilation_success.rs

@@ -0,0 +1 @@
+fn main() {}

tests/test_exercises/exercises/not_in_info.rs

@@ -0,0 +1 @@
+fn main() {}

tests/test_exercises/exercises/test_failure.rs

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+fn main() {}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn fails() {
+        asset!(false);
+    }
+}

tests/test_exercises/exercises/test_success.rs

@@ -0,0 +1,9 @@
+fn main() {
+    println!("Output from `main` function");
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn passes() {}
+}

tests/test_exercises/info.toml

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+format_version = 1
+
+[[exercises]]
+name = "compilation_success"
+test = false
+hint = ""
+
+[[exercises]]
+name = "compilation_failure"
+test = false
+hint = ""
+
+[[exercises]]
+name = "test_success"
+hint = ""
+
+[[exercises]]
+name = "test_failure"
+hint = "The answer to everything: 42"