/**
* Returns a string describing the exception type caught by the given try tree's catch
* statement(s), defaulting to {@code "Exception"} if more than one exception type is caught.
*/
private String exceptionToString(TryTree tree) {
if (tree.getCatches().size() != 1) {
return "Exception";
}
String exceptionType = tree.getCatches().iterator().next().getParameter().getType().toString();
if (exceptionType.contains("|")) {
return "Exception";
}
return exceptionType;
}
private boolean anyCatchBlockMatches(TryTree tree, VisitorState state, Matcher<Tree> matcher) {
for (CatchTree catchTree : tree.getCatches()) {
if (matcher.matches(catchTree.getBlock(), state)) {
return true;
}
}
return false;
}
private boolean hasExpectedException(TryTree tree) {
for (CatchTree catchTree : tree.getCatches()) {
if (catchTree.getParameter().getName().toString().equals("expected")) {
return true;
}
}
return false;
}
private boolean isInapplicableExceptionType(TryTree tree, VisitorState state) {
for (CatchTree catchTree : tree.getCatches()) {
if (INAPPLICABLE_EXCEPTION.matches(catchTree.getParameter(), state)) {
return true;
}
}
return false;
}
@Override
public Description matchTry(TryTree tree, VisitorState state) {
if (tryTreeMatches(tree, state)) {
List<? extends StatementTree> tryStatements = tree.getBlock().getStatements();
StatementTree lastTryStatement = tryStatements.get(tryStatements.size() - 1);
String failCall = String.format("%nfail(\"Expected %s\");", exceptionToString(tree));
SuggestedFix.Builder fixBuilder =
SuggestedFix.builder().postfixWith(lastTryStatement, failCall);
// Make sure that when the fail import is added it doesn't conflict with existing ones.
fixBuilder.removeStaticImport("junit.framework.Assert.fail");
fixBuilder.removeStaticImport("junit.framework.TestCase.fail");
fixBuilder.addStaticImport("org.junit.Assert.fail");
return describeMatch(lastTryStatement, fixBuilder.build());
} else {
return Description.NO_MATCH;
}
}
@Override
protected Iterable<? extends StatementTree> getChildNodes(TryTree tree, VisitorState state) {
return tree.getBlock().getStatements();
}
private boolean hasFinally(TryTree tree) {
return tree.getFinallyBlock() != null;
}