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Apparently, solidity creates getter functions for public variables. How does one call them using javascript? (for testing within truffle)

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You just call them as you would any other function. The getter function has the same name as the state variable, so if you have:

uint256 public foo;

then you can read its value in JavaScript with:

contract.foo()

See https://programtheblockchain.com/posts/2018/01/02/making-smart-contracts-with-public-variables/.

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    let foo = await contract.foo() if you want the actual web3.BigNumber object rather than a Promise object. – goodvibration Feb 21 '18 at 14:34
  • Yes, or contract.foo.then(...) or, via web3.js 0.2x.x, contract.foo.call(callback), etc. It's just the same as calling any other function. – user19510 Feb 21 '18 at 14:39

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