assertEquals("message should be default", "{org.lastaflute.validator.constraints.UriType.message}", annotation.message());
        assertEquals("groups should be empty", 0, annotation.groups().length);
        assertEquals("payload should be empty", 0, annotation.payload().length);
    }

    // Test annotation on field with FILE protocol
    @Test

        assertNotNull(annotation, "Annotation should be present on field");
        assertEquals("Default message should match", "{jakarta.validation.constraints.Size.message}", getDefaultMessage());
        assertEquals("Default groups should be empty", 0, getDefaultGroups().length);
        assertEquals("Default payload should be empty", 0, getDefaultPayload().length);
        assertEquals("Default minKey should be empty", StringUtil.EMPTY, getDefaultMinKey());

        assertFalse("Should capture some thread dump output", capturedOutput.isEmpty());

        // Verify format - should contain "Thread:" entries
        boolean hasThreadEntry = capturedOutput.stream().anyMatch(line -> line.startsWith("Thread:"));
        assertTrue("Should contain Thread: entries", hasThreadEntry);

        // Verify format - should contain stack trace entries

        String queryString = result.toString();
        assertTrue("Should contain tag1", queryString.contains("tag1"));
        assertTrue("Should contain tag2", queryString.contains("tag2"));
        assertTrue("Should contain tag3", queryString.contains("tag3"));
        // Should be minimum_should_match = 1 (OR logic)
        assertTrue("Should use should clauses", queryString.contains("should"));
    }

    @Test

        assertTrue(TimeoutTarget.class.isAssignableFrom(SystemMonitorTarget.class), "SystemMonitorTarget should implement TimeoutTarget");
    }

    @Test
    public void test_constructor() {
        assertNotNull(target, "Constructor should create instance");
        assertTrue(target instanceof SystemMonitorTarget, "Instance should be of correct type");

		t.Fatalf("Should find 1 tags after Delete")
	}

	if DB.Model(&blog).Association("Tags").Count() != 1 {
		t.Fatalf("Blog should has three tags after Delete")
	}

	DB.Model(&blog).Association("Tags").Delete(tag3)
	var tags4 []Tag
	DB.Model(&blog).Association("Tags").Find(&tags4)
	if !compareTags(tags4, []string{"tag6"}) {
		t.Fatalf("Tag should not be deleted when Delete with a unrelated tag")

        assertTrue(target instanceof MonitorTarget, "Instance should be a MonitorTarget");
        assertTrue(target instanceof TimeoutTarget, "Instance should be a TimeoutTarget");
    }

    @Test
    public void test_expired_method_exists() throws Exception {
        assertNotNull(HotThreadMonitorTarget.class.getMethod("expired"), "expired method should exist");
    }

    @Test

In this case, you could want to document how that external API *should* look like. What *path operation* it should have, what body it should expect, what response it should return, etc.

## An app with callbacks { #an-app-with-callbacks }

Let's see all this with an example.

Imagine you develop an app that allows creating invoices.

These invoices will have an `id`, `title` (optional), `customer`, and `total`.

        Suggester suggester = createSuggester();

        // Multiple consecutive calls should be safe
        suggester.createIndexIfNothing();
        suggester.createIndexIfNothing();
        suggester.createIndexIfNothing();

        // Should still be able to use the index
        suggester.refresh();
        assertEquals("Index should work normally", 0, suggester.getAllWordsNum());
    }

                defaultReadingConverter, defaultReadingConverter, defaultNormalizer, analyzer);

        // Whitespace-only content should produce empty or filtered items
        // Items with blank words should be filtered
        for (SuggestItem item : items) {
            assertTrue("Items should not have blank text", item.getText().trim().length() > 0);
        }
    }

    @Test