chore(mustache): add tests for new mustache parsing

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Summary:
ext of #1767, added tests to mustache.rs

Summary by CodeRabbit

• Tests
  • Added a test for optional dot expressions in the Mustache module to ensure correct parsing and comparison.

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Walkthrough

Walkthrough

This update introduces a new test for handling optional dot expressions in the Mustache module. The primary focus is on enhancing the module's capability to parse and evaluate these expressions, ensuring that they are correctly interpreted and compared within the template system.

Changes

File Path	Change Summary
src/mustache.rs	Added a test for parsing and comparing optional dot expressions.

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Recent Review Details

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Review profile: CHILL

Commits

Files that changed from the base of the PR and between a6cea61 and d08d621.

Files selected for processing (1)

• src/mustache.rs (1 hunks)

Additional Context Used

Path-based Instructions (1)

src/mustache.rs (1)

Pattern **/*.rs: Programming Style Guidelines

• When calling functions that do not need to modify values, pass references of those values.
• When calling functions that need to modify values, pass ownership of the values, and ensure they are returned from the function.

IMPORTANT: This programming style may not be suitable for performance-sensitive components or hot code paths. In such cases, prioritize efficiency and optimization strategies to enhance performance.

Testing

1. Write Tests: For every new feature or bugfix, ensure that you write appropriate tests.
   Structure your tests in the following way:

   use pretty_assertions::assert_eq;
   fn test_something_important() {
      let value = setup_something_using_a_function();
   
      let actual = perform_some_operation_on_the_value(value);
      let expected = ExpectedValue {foo: 1, bar: 2};
   
      assert_eq!(actual, expected);
   }

   • Setup the value using helper methods in tests.
   • Create an actual and an expected value.
   • Assert the two values in a new line.
   • Ensure there are only one assertions per test.

Additional comments not posted (1)

src/mustache.rs (1)

357-368: The test test_optional_dot_expression correctly checks the parsing of an optional dot expression. However, consider adding more comprehensive tests to cover edge cases and invalid inputs.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.90%. Comparing base (a6cea61) to head (d08d621).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1771      +/-   ##
==========================================
+ Coverage   86.89%   86.90%   +0.01%     
==========================================
  Files         155      155              
  Lines       15600    15612      +12     
==========================================
+ Hits        13555    13567      +12     
  Misses       2045     2045              

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