I have a text which contains some subtext like this:

depletion rate 1.43/second

Decimal number can vary.

I want to test it, so I do:

String expected = "depletion rate ^\\d*\\.\\d+|\\d+\\.\\d*$/second";
Assertions.assertThat(text).containsPattern(expected);

But this doesn’t work.

Is my regex not correct to match a positive decimal number?

>Solution :

Your regex pattern is off, and is using ^ and $ anchors in the middle of the pattern. Simply use \d+\.\d+ to match a decimal number:

String expected = "depletion rate \\d+\\.\\d+/second";
Assertions.assertThat(text).containsPattern(expected);