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Unit Testing for NoiseFunction Class

This function may produce unexpected output if the noise function logic is changed in the future. This may not seem like a big thing at first however these bugs may be very subtle and not get noticed right away and thus lead to strange results in the world creation and customisation. Due to this I wrote the unit test for this method so in the future we can quickly asses if new bugs arise.

Test Case 1: test_weigh_without_weights

Description:

This test case checks if the NoiseFunction.weigh method works correctly when no weights are given.

Steps:

  1. Create two NoiseFunction instances with specific parameters.
  2. Calculate the expected result based on the noise values from the two functions.
  3. Call the NoiseFunction.weigh method with the functions and no weights.
  4. Assert that the calculated result matches the expected result.

Test Case 2: test_weigh_with_custom_weights

Description:

This test case verifies the functionality of NoiseFunction.weigh with custom weights for each function.

Steps:

  1. Create two NoiseFunction instances with specific parameters.
  2. Define custom weights for each function.
  3. Calculate the expected result based on the noise values and custom weights.
  4. Call the NoiseFunction.weigh method with the functions and custom weights.
  5. Assert that the calculated result matches the expected result.

Test Case 3: test_weigh_with_insufficient_weights

Description:

This test case tests the behavior of NoiseFunction.weigh when fewer weights than functions are provided.

Steps:

  1. Create two NoiseFunction instances with specific parameters.
  2. Define weights for one function and an expected weight for the other.
  3. Calculate the expected result based on the noise values and weights.
  4. Call the NoiseFunction.weigh method with the functions and insufficient weights.
  5. Assert that the calculated result matches the expected result.

Test Case 4: test_weigh_with_single_function

Description:

This test case validates the functionality of NoiseFunction.weigh with only one function.

Steps:

  1. Create a NoiseFunction instance with specific parameters.
  2. Calculate the expected result based on the noise value from the function.
  3. Call the NoiseFunction.weigh method with the single function.
  4. Assert that the calculated result matches the expected result.

Test Case 5: test_weigh_without_functions

Description:

This test case ensures that NoiseFunction.weigh raises an error when an empty list of functions is provided.

Steps:

  1. Define x and y values.
  2. Try to call the NoiseFunction.weigh method with an empty list of functions.
  3. Expect a ValueError to be raised.