I've encountered an issue when using Java 1.8 (JDK 8).
import static org.fest.assertions.api.Assertions.assertThat;
public class FestTest {
public static <T> T someMethod() {
return (T) "123";
}
public static void main(String[] args) {
assertThat(someMethod()).isEqualTo("123");
}
}
This runs fine in Java 7 but not Java 8, which gives these compile errors:
java: reference to assertThat is ambiguous
both method assertThat(java.lang.Boolean) in org.fest.assertions.api.Assertions and method assertThat(java.math.BigDecimal) in org.fest.assertions.api.Assertions match
java: no suitable method found for isEqualTo(java.lang.String)
method org.fest.assertions.api.AbstractAssert.isEqualTo(java.lang.Boolean) is not applicable
(argument mismatch; java.lang.String cannot be converted to java.lang.Boolean)
method org.fest.assertions.api.BooleanAssert.isEqualTo(boolean) is not applicable
(argument mismatch; java.lang.String cannot be converted to boolean)
Basically Java 8 is more strict in its generic typing than Java 7 and considered more correct, so the code in https://github.com/alexruiz/fest-assert-2.x/tree/fest-assert-core-2.0M10 is considered invalid by the compiler. Is there any hope of an update resolving this issue? A simple fix to this is to cast the return to an appropriate type:
I've encountered an issue when using Java 1.8 (JDK 8).
This runs fine in Java 7 but not Java 8, which gives these compile errors:
The issue is also reported here:
http://openjdk.5641.n7.nabble.com/Re-Strange-covariant-generics-downcasting-issue-with-JDK8-td158942.html
Basically Java 8 is more strict in its generic typing than Java 7 and considered more correct, so the code in https://github.com/alexruiz/fest-assert-2.x/tree/fest-assert-core-2.0M10 is considered invalid by the compiler. Is there any hope of an update resolving this issue? A simple fix to this is to cast the return to an appropriate type:
assertThat((Object) someMethod()).isEqualTo("123");
But this is quite tedious if we have hundreds of such lines in our code with different types.