Problem with SVG to Image URI Conversion in Tests

[jupiter-Pulin]

I'm encountering an issue in my test for converting an SVG to an image URI. Below is the relevant test code:

function testSvgImageToTokenUri() public {
    string memory svg = '<svg viewBox="0 0 200 200" width="400" height="400" xmlns="http://www.w3.org/2000/svg"><circle cx="100" cy="100" fill="yellow" r="78" stroke="black" stroke-width="3"/><g class="eyes"><circle cx="70" cy="82" r="12"/><circle cx="127" cy="82" r="12"/></g><path d="m136.81 116.53c.69 26.17-64.11 42-81.52-.73" style="fill:none; stroke: black; stroke-width: 3;"/></svg>';
    string memory actualURI = deployer.svgToImageURI(svg);
    string memory expectedURI = "data:image/svg+xml;base64,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";

    assert(
        keccak256(abi.encodePacked(actualURI)) ==
        keccak256(abi.encodePacked(expectedURI))
    );
}

Here is the function being tested:

solidity

function svgToImageURI(string memory svg) public pure returns (string memory) {
    string memory baseURI = "data:image/svg+xml;base64,";
    string memory svgBase64Encoded = Base64.encode(
        bytes(abi.encodePacked(svg))
    );
    return string(abi.encodePacked(baseURI, svgBase64Encoded));
}
The problem is that the test fails because the actualURI generated from svgToImageURI does not match the expectedURI. I’ve verified the SVG input and expected base64-encoded output.

Is there any potential issue with my encoding logic, or could it be related to differences in formatting? I would appreciate any advice or guidance on how to resolve this problem.

[EngrPips]

Please run your test with the -vvvv flag and show your stack trace

[EngrPips]

The issue is with Base64 Encoding sensitivity, which simply means there is a difference in the content of what you encode to get your actualURI and what you encode to get your expectedURI, which return means the Base64 output will be different and hence your assertion failed. Base64 is very sensitive and a whitespace difference will totally change the encoding output.

[jupiter-Pulin]

I still have a problem: when trying to run a specific test, an error appears. The test script is fine, but I can't run a single test:

vbnet
forge test -m testSvgImageToTokenUri  
error: unexpected argument '-m' found  

  tip: to pass '-m' as a value, use '-- -m'  

Usage: forge test [OPTIONS] [PATH]  

For more information, try '--help'.  
tang-pulin@Jupiter-laptop:~/NFT$ forge test -- -m testSvgImageToTokenUri  
error: unexpected argument 'testSvgImageToTokenUri' found  

Usage: forge test [OPTIONS] [PATH]  

For more information, try '--help'.  

What command should I use?

[EngrPips]

use --mt instead of -m

[jupiter-Pulin]

thanks!!

[EngrPips]

Anytime, Friend. Keep crushing it.