Tests for assume

[adpaco-aws]

Description of changes:

Adds two simple tests for the assume intrinsic. The current implementation is minimal - the cast to bool cannot be removed (this induces a type-check error later)

The only problem with this intrinsic is the confusing message shown. For example, when applied to assume_ok, the output will show:

Check 1: main.assertion.1
         - Status: SUCCESS
         - Description: "assumption failed"
         - Location: assume_ok.rs:9:14 in function main

Which is similar to the problem with user-defined assertions ( #189 / #562 ), but worse because the condition is not printed.

Resolved issues:

Part of #727

Call-outs:

Testing:

• How is this change tested? Adds two tests.

• Is this a refactor change? No.

Checklist

• Each commit message has a non-empty body, explaining why the change was made
• Methods or procedures are documented
• Regression or unit tests are included, or existing tests cover the modified code
• My PR is restricted to a single feature or bugfix

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 and MIT licenses.