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joel-costigliola / assertj

AssertJ documentation
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NumberAssertions in AbstractArrayAssert #49

Closed GoGoris closed 8 years ago

GoGoris commented 8 years ago

Hi, I noticed that when I use extracting(), there are no NumberAssertions. I have numeric collections with ints and doubles and it would be very handy if I could do doesNotContainZero() or other numeric asserts.

Example: assertThat(Collections.<BigInteger>emptyList()).extracting(BigInteger::intValue).doesNotContainZero()

PascalSchumacher commented 8 years ago

Hi GoGoris,

there is no #doesNotContainZero() method in assertj as far as I know, and NumberAssertions are just for single numbers, while extracting "returns" a collection. You can check that the values do not contain zero by using:

assertThat(Collections.<BigInteger>emptyList()).extracting(BigInteger::intValue).doesNotContain(0);

There are other methods to check that all values / at least one value etc. meet a condition e.g.

assertThat(Collections.<BigInteger>emptyList()).extracting(BigInteger::intValue).allMatch(i -> i > 0 && i < 10).areAtLeastOne(new Condition<>(i -> i == 5, "contains at least one 5"));

Cheers, Pascal

joel-costigliola commented 8 years ago

@GoGoris I'm closing this issue as @PascalSchumacher's answer shows how to address your request and because this project is only the website. If you feel the answer is not satisfying please raise an issue in assertj-core.