Java 类org.hamcrest.DiagnosingMatcher 实例源码

private Matcher<String> matchesPattern(final String pattern) {
    return new DiagnosingMatcher<String>() {
        @Override
        protected boolean matches(Object item, Description mismatchDescription) {
            if (!((String) item).matches(pattern)) {
                mismatchDescription.appendValue(item).appendText(" did not match regex ").appendValue(pattern);
            }
            return ((String) item).matches(pattern);
        }

        @Override
        public void describeTo(Description description) {
            description.appendText("a string matching regex ").appendValue(pattern);
        }
    };
}

@Factory
private static DiagnosingMatcher<Object> translateTo(HttpStatus status) {
    return new DiagnosingMatcher<Object>() {
        private static final String EXCEPTION = "EXCEPTION";

        @Override
        public void describeTo(final Description description) {
            description.appendText("does not translate to ").appendText(status.toString());
        }

        @SuppressWarnings("unchecked")
        protected boolean matches(final Object item, final Description mismatch) {

            if (item instanceof Class) {
                if (((Class) item).getClass().isInstance(Throwable.class)) {
                    Class<? extends Throwable> type = (Class<? extends Throwable>) item;
                    try {
                        Throwable exception = type.getConstructor(String.class).newInstance(EXCEPTION);
                        Mono.just(exception).transform(ThrowableTranslator::translate).subscribe(translator -> {
                            assertThat(translator.getMessage(), is(EXCEPTION));
                            assertThat(translator.getHttpStatus(), is(status));
                        });
                    } catch (InstantiationException | IllegalAccessException |
                            InvocationTargetException | NoSuchMethodException cause) {
                        throw new AssertionError("This exception class has not constructor with a String", cause);
                    }
                    return true;
                }
            }
            mismatch.appendText(item.toString());
            return false;
        }
    };
}

public static DiagnosingMatcher<Table> hasRowThat(Matcher<?>... cells) {
    return new DiagnosingMatcher<Table>() {
        @Override
        protected boolean matches(Object item, Description mismatchDescription) {
            TableModel model = ((Table) item).getModel();
            outer: for (int row = 0; row < model.getRowCount(); row++) {
                mismatchDescription.appendText("\nRow " + row + ": ");
                for (int col = 0; col < cells.length; col++) {
                    mismatchDescription.appendText("\n  Column " + col + ": ");
                    cells[col].describeMismatch(model.getValue(row, col), mismatchDescription);
                    if (!cells[col].matches(model.getValue(row, col))) {
                        continue outer;
                    }
                }
                return true;
            }
            return false;
        }

        @Override
        public void describeTo(Description description) {
            description.appendText("a table having at least one row that\n");
            for (int col = 0; col < cells.length; col++) {
                description.appendText("column " + col + ": ");
                cells[col].describeTo(description);
                description.appendText("\n");
            }
        }
    };
}

public static <T> Function1<T, String> diagnoseMismatch(final DiagnosingMatcher matcher) {
    return t -> {
        StringDescription mismatchDescription = new StringDescription();
        matcher.describeMismatch(t, mismatchDescription);
        return mismatchDescription.toString();
    };
}

/**
 * A bit better version of CoreMatchers.allOf.
 * For example:
 * <pre>assertThat("myValue", allOf(startsWith("my"), containsString("Val")))</pre>
 */
@SafeVarargs
public static <T> Matcher<T> allOf(Matcher<? super T>... matchers) {
  return new DiagnosingMatcher<T>() {
    @Override
    protected boolean matches(Object o, Description mismatch) {
      boolean ret = true;
      for (Matcher<? super T> matcher : matchers) {
        if (!matcher.matches(o)) {
          if (ret)
            mismatch.appendText("(");
          mismatch.appendText("\n  ");
          mismatch.appendDescriptionOf(matcher).appendText(" ");
          matcher.describeMismatch(o, mismatch);
          ret = false;
        }
      }
      if (!ret)
        mismatch.appendText("\n)");
      return ret;
    }

    @Override
    public void describeTo(Description description) {
      description.appendList("(\n  ", " " + "and" + "\n  ", "\n)", Arrays.stream(matchers).collect(toList()));
    }
  };
}

public static <T> Function1<T, String> describeMismatch(final Matcher<? super T> matcher) {
    if (matcher instanceof DiagnosingMatcher)
        return diagnoseMismatch((DiagnosingMatcher) matcher);
    return returns1(StringDescription.asString(matcher));
}

public static <T> Function1<T, String> diagnoseMismatch(Class<T> type, final DiagnosingMatcher matcher) {
    return diagnoseMismatch(matcher);
}