ReflectionPathResolverTest.java

package io.cloudquery.helper;

import lombok.Builder;
import org.junit.jupiter.api.Test;

import java.util.List;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;

class ReflectionPathResolverTest {
    @Builder
    private static class TestClass {
        private String name;

        @Builder.Default
        private List<Integer> numbers = List.of(1, 2, 3);

        private TestClass singleChild;

        private List<TestClass> multipleChildren;
    }

    private static final TestClass TEST_DATA = TestClass.builder().name("root").
            singleChild(TestClass.builder().name("single-child1").build()).
            multipleChildren(
                    List.of(
                            TestClass.builder().name("multi-child1").build(),
                            TestClass.builder().name("multi-child2").build()
                    )
            ).
            build();

    @Test
    public void shouldResolveSimpleFields() throws ReflectionPathResolver.PathResolverException {
        assertEquals("root", ReflectionPathResolver.resolve(TEST_DATA, "name"));
        assertEquals(List.of(1, 2, 3), ReflectionPathResolver.resolve(TEST_DATA, "numbers"));
    }

    @Test
    public void shouldResolveNestedField() throws ReflectionPathResolver.PathResolverException {
        assertEquals("single-child1", ReflectionPathResolver.resolve(TEST_DATA, "singleChild.name"));
    }

    @Test
    public void shouldThrowAnErrorIfWeEncounterACollection() {
        assertThrows(ReflectionPathResolver.PathResolverException.class, () -> ReflectionPathResolver.resolve(TEST_DATA, "multiplChildren.name"));
    }
}