Angular 19 specs won't run

When using this library in an Angular 19 application, I'm having an issue running my test suite. None of the tests run due to the following:

✔ Browser application bundle generation complete.

./node_modules/plotly.js-dist-min/plotly.min.js - Error: Module not found: Error: Can't resolve 'd3-array' in '.../node_modules/plotly.js-dist-min'

./node_modules/plotly.js-dist-min/plotly.min.js - Error: Module not found: Error: Can't resolve 'd3-collection' in '.../node_modules/plotly.js-dist-min'

./node_modules/plotly.js-dist-min/plotly.min.js - Error: Module not found: Error: Can't resolve 'd3-dispatch' in '.../node_modules/plotly.js-dist-min'

./node_modules/plotly.js-dist-min/plotly.min.js - Error: Module not found: Error: Can't resolve 'd3-geo' in '.../node_modules/plotly.js-dist-min'

./node_modules/plotly.js-dist-min/plotly.min.js - Error: Module not found: Error: Can't resolve 'd3-path' in '.../node_modules/plotly.js-dist-min'

./node_modules/plotly.js-dist-min/plotly.min.js - Error: Module not found: Error: Can't resolve 'd3-quadtree' in '.../node_modules/plotly.js-dist-min'

./node_modules/plotly.js-dist-min/plotly.min.js - Error: Module not found: Error: Can't resolve 'd3-shape' in '.../node_modules/plotly.js-dist-min'

./node_modules/plotly.js-dist-min/plotly.min.js - Error: Module not found: Error: Can't resolve 'd3-time' in '.../node_modules/plotly.js-dist-min'

./node_modules/plotly.js-dist-min/plotly.min.js - Error: Module not found: Error: Can't resolve 'd3-timer' in '.../node_modules/plotly.js-dist-min'

./node_modules/plotly.js-dist-min/plotly.min.js - Error: Module not found: Error: Can't resolve 'elementary-circuits-directed-graph' in '.../node_modules/plotly.js-dist-min'

I'm not sure how to diagnose this and the plotly.js github doesn't show any issues like this in their repository. Could I get some help getting pointed in the right direction on diagnosing the issue here and overcoming it?

For what it is worth, the plots work great when serving the application, so I'm hopeful that there is something I need to do to get my specs running again.

Start by reproducing the Angular 19 test suite failure and inspect the module-resolution errors reported for node_modules/plotly.js-dist-min/plotly.min.js. Compare the test build with the serving build, then confirm that the missing dependencies are resolved and the specs run successfully.