Java Truth OR assertion-CodePudding

I would like to check with Java Truth assertion library if any of the following statements is satisfied:

assertThat(strToCheck).startsWith("a");
assertThat(strToCheck).contains("123");
assertThat(strToCheck).endsWith("@");

In another word, I am checking if strToCheck starts with a OR contains the substring 123, OR ends with @. Aka, if any of the 3 conditions applies. I am just giving the assertions as an example.

Is there a way to do the logical OR assertion with Truth?

I know with Hamcrest, we could do something like:

assertThat(strToCheck, anyOf(startsWith("a"), new StringContains("123"), endsWith("@")));

CodePudding user response：

assertTrue(strToCheck.startsWith("a") || strToCheck.contains("123") ||strToCheck.endsWith("@"));

You can do what you asked for with this single line only.

CodePudding user response：

Going to flip this on its head, since you're talking about testing.

You should be explicit about what you're asserting, and not so wide-open about it.

For instance, it sounds like you're expecting something like:

a...123@
a123@
a
@
123

...but you may only actually care about one of those cases.

So I would encourage you to explicitly validate only one of each. Even though Hamcrest allows you to find any match, this too feels like an antipattern; you should be more explicit about what it is you're expecting given a set of strings.

CodePudding user response：

Why not use a regular expression to solve this:

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
  public static void main(String[] args) {

String strToCheck = "afoobar123barfoo@";
    Pattern pattern = Pattern.compile("a.*123.*@");
    Matcher matcher = pattern.matcher(strToCheck);
    boolean matchFound = matcher.find();
    //matchFound now contains a true/false value. 
  }
}