Configuring Provider For Assertions (i.e. G-eval) Doesn't Work With FunctionProvider

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Introduction

Promptfoo is a powerful tool for evaluating and testing AI models. However, when trying to configure a default function provider for model-graded metrics using the node API, users may encounter issues. In this article, we will delve into the problem of configuring a provider for assertions (i.e. g-eval) that doesn't work with FunctionProvider.

Describe the Bug

The issue arises when trying to configure a default function provider for model-graded metrics using the node API. The problem is that the loadApiProvider function, which is responsible for loading the API provider, currently does not handle functions. This means that when a function is passed as a provider, it is not properly loaded, resulting in an error.

To Reproduce

To reproduce this behavior, follow these steps:

Example Node Code

const results = await promptfoo.evaluate({
  prompts: ['Rephrase this in French: {body}', 'Rephrase this like a pirate: {body}'],
  defaultTest: {
    options: {
      provider: (prompt, context) => { ... }
    }
    assert: [
      {
        type: "g-eval",
        value: [
          "test to ensure the model provides one response",
          "ensure that the model responds in a polite manner",
        ],
      }
    ]
  },

In this example, we are trying to configure a default function provider for model-graded metrics using the node API. However, as we will see later, this will result in an error because the loadApiProvider function does not handle functions.

Expected Behavior

The expected behavior is that the provider function is called to process the g-eval assert. However, due to the issue with the loadApiProvider function, this is not happening.

Screenshots

No screenshots are available for this issue.

System Information

Here is the system information for the environment where this issue was encountered:

{
  "version": "0.111.1",
  "platform": {
    "os": "darwin",
    "release": "24.4.0",
    "arch": "arm64",
    "nodeVersion": "v20.18.1"
  },
  "env": {},
  "configInfo": {
    "configExists": false,
    "configContent": null
  }
}

Analysis

The issue arises from the fact that the loadApiProvider function does not handle functions. This means that when a function is passed as a provider, it is not properly loaded, resulting in an error.

Solution

To fix this issue, we need to modify the loadApiProvider function to handle functions. This can be done by adding a check to see if the provider is a function, and if so, calling it.

Here is an example of how the modified loadApiProvider function could look:

function loadApiProvider(provider: any) {
  if (typeof provider === 'function') {
    return provider();
  } else {
    return provider;
  }
}

With this modification, the loadApiProvider will now handle functions correctly, and the issue with configuring a provider for assertions (i.e. g-eval) should be resolved.

Conclusion

In conclusion, the issue with configuring a provider for assertions (i.e. g-eval) that doesn't work with FunctionProvider is due to the fact that the loadApiProvider function does not handle functions. By modifying the loadApiProvider function to handle functions, we can resolve this issue and ensure that the provider function is called to process the g-eval assert.

Recommendations

Based on our analysis, we recommend the following:

  • Modify the loadApiProvider function to handle functions.
  • Update the documentation to reflect the changes to the loadApiProvider function.
  • Test the modified loadApiProvider function to ensure that it works correctly.

Introduction

In our previous article, we discussed the issue with configuring a provider for assertions (i.e. g-eval) that doesn't work with FunctionProvider. In this article, we will provide a Q&A section to help answer some of the common questions related to this issue.

Q: What is the issue with configuring a provider for assertions (i.e. g-eval) that doesn't work with FunctionProvider?

A: The issue arises from the fact that the loadApiProvider function does not handle functions. This means that when a function is passed as a provider, it is not properly loaded, resulting in an error.

Q: What is the loadApiProvider function?

A: The loadApiProvider function is responsible for loading the API provider. It takes a provider as an argument and returns the loaded provider.

Q: Why doesn't the loadApiProvider function handle functions?

A: The loadApiProvider function does not handle functions because it was not designed to do so. However, this can be modified to handle functions by adding a check to see if the provider is a function, and if so, calling it.

Q: How can I modify the loadApiProvider function to handle functions?

A: To modify the loadApiProvider function to handle functions, you can add a check to see if the provider is a function, and if so, calling it. Here is an example of how the modified loadApiProvider function could look:

function loadApiProvider(provider: any) {
  if (typeof provider === 'function') {
    return provider();
  } else {
    return provider;
  }
}

Q: What are the benefits of modifying the loadApiProvider function to handle functions?

A: The benefits of modifying the loadApiProvider function to handle functions include:

  • Ensuring that the provider function is called to process the g-eval assert.
  • Resolving the issue with configuring a provider for assertions (i.e. g-eval) that doesn't work with FunctionProvider.

Q: How can I test the modified loadApiProvider function to ensure that it works correctly?

A: To test the modified loadApiProvider function, you can use a testing framework such as Jest or Mocha. Here is an example of how you can test the modified loadApiProvider function:

describe('loadApiProvider', () => {
  it('should return the provider if it is a function', () => {
    const provider = () => 'test';
    expect(loadApiProvider(provider)).toBe('test');
  });

  it('should return the provider if it is not a function', () => {
    const provider = 'test';
    expect(loadApiProvider(provider)).toBe('test');
  });
});

Q: What are some best practices for configuring a provider for assertions (i.e. g-eval)?

A: Some best practices for configuring a provider for assertions (i.e. g-eval) include:

  • Ensuring that the provider function is called to process the g-eval assert.
  • Using a testing framework to test the provider function.
  • Modifying the loadApiProvider function to handle functions.

Conclusion

In conclusion, the issue with configuring a provider for assertions (i.e. g-eval) that doesn't work with FunctionProvider is due to the fact that the loadApiProvider function does not handle functions. By modifying the loadApiProvider function to handle functions, we can resolve this issue and ensure that the provider function is called to process the g-eval assert.