import org.junit.Test;

import static org.junit.Assert.*;

public class LibraryTest {

    @Test
    public void testSomeLibraryMethod() {
        Library classUnderTest = new Library();
        assertTrue("someLibraryMethod should return 'true'", classUnderTest.someLibraryMethod());
    }
}

@@ -17,16 +17,59 @@
 .Test;%0A%0A
+import static org.hamcrest.CoreMatchers.*;%0A
 import s
@@ -94,16 +94,16 @@
 sert.*;%0A
-
 %0Apublic 
@@ -187,142 +187,61 @@
     
-Library classUnderTest = new Library();%0A        assertTrue(%22someLibraryMethod should return 'true'%22, classUnderTest.someLibraryMethod(
+assertThat(new Library().someLibraryMethod(), is(true
 ));%0A

Use assertThat instead of assertTrue