Code from github.com/anakrish/rego-rs

Authored by anakrish and mingweishih

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>

tests/interpreter/cases/arithmetic/mod.rs

@@ -0,0 +1,45 @@
+// Copyright (c) Rego-Rs Authors.
+// Licensed under the Apache 2.0 license.
+#![cfg(test)]
+
+use crate::interpreter::*;
+use anyhow::Result;
+
+#[test]
+fn basic() -> Result<()> {
+    let rego = r#"
+    package test
+
+    add {
+      1 + 2 == 3
+    }
+
+    sub {
+      5 - 1 == 4
+    }
+
+    mul {
+      3 * 4 == 12
+    }
+
+    # Lock down float operation.
+    div {
+      21 / 5 == 4.2
+    }
+"#;
+
+    let expected = Value::from_json_str(
+        r#" {
+    "add" : true,
+    "sub" : true,
+    "mul" : true,
+    "div" : true
+}"#,
+    )?;
+
+    assert_eq!(
+        eval_file(&[rego.to_owned()], None, None, "data.test")?,
+        expected
+    );
+    Ok(())
+}