IntelliJ Structural Search to Convert from JUnit3 to Junit4
Just a quick tip for intellij users. For an old project i wanted to convert JUnit 3 testcases to JUnit4 format. Most stuff was already in place, but after the conversion, i found that some of the old “assertTrue”, “assertFalse”, and “assertEquals” statements were failing.
So i ended up with some short search/replace, which are really handy in IntelliJ.
Replace “assertTrue” and “assertFalse” with “assertThat”
Search template
assertTrue($msg$, $actual$);
Replacement template:
org.junit.Assert.assertThat.assertThat($msg$, $actual$, org.hamcrest.core.Is.is(true));
Remove “assertEquals” with delta values
Search template
assertEquals($msg$, $expected$, $actual$, $delta$);
Replacement template:
org.junit.Assert.assertThat($msg$, $actual$, org.hamcrest.core.Is.is($expected$));
Optional Replace “assertEquals” with “assertThat”
Search template
assertEquals($msg$, $expected$, $actual$);
Replacement template:
org.junit.Assert.assertThat.assertThat($msg$, $actual$, org.hamcrest.core.Is.is($expected$));
