platform/northbound/jsonpath-filtering/json-provider-minimal/src/test/java/org/eclipse/sensinact/gateway/nthbnd/test/jsonpath/ReturnTypeTest.java

package org.eclipse.sensinact.gateway.nthbnd.test.jsonpath;

import com.jayway.jsonpath.Configuration;
import com.jayway.jsonpath.ReadContext;
import org.junit.Test;

import java.util.List;
import java.util.Map;

import static com.jayway.jsonpath.JsonPath.parse;
import static com.jayway.jsonpath.JsonPath.using;
import static com.jayway.jsonpath.Option.AS_PATH_LIST;
import static org.assertj.core.api.Assertions.assertThat;

@SuppressWarnings("ALL")
public class ReturnTypeTest extends BaseTestConfiguration {
    private static ReadContext reader = parse(BaseTestJson.JSON_DOCUMENT);

    @Test
    public void assert_strings_can_be_read() {
        assertThat(reader.read("$.string-property")).isEqualTo("string-value");
    }

    @Test
    public void assert_ints_can_be_read() {
        assertThat(reader.read("$.int-max-property", Integer.class)).isEqualTo(Integer.MAX_VALUE);
    }

    @Test
    public void assert_longs_can_be_read() {
        assertThat(reader.read("$.long-max-property")).isEqualTo(Long.MAX_VALUE);
    }

    @Test
    public void assert_boolean_values_can_be_read() {
        assertThat(reader.read("$.boolean-property")).isEqualTo(true);
    }

    @Test
    public void assert_null_values_can_be_read() {
        assertThat(reader.read("$.null-property")).isNull();
    }

    @Test
    public void assert_arrays_can_be_read() {
        /*
        Object result = reader.read("$.store.book");
        assertThat(reader.configuration().jsonProvider().isArray(result)).isTrue();
        assertThat(reader.configuration().jsonProvider().length(result)).isEqualTo(4);
        */
        assertThat(reader.read("$.store.book", List.class)).hasSize(4);
    }

    @Test
    public void assert_maps_can_be_read() {
        assertThat(reader.read("$.store.book[0]", Map.class)).containsEntry("category", "reference").containsEntry("author", "Nigel Rees").containsEntry("title", "Sayings of the Century").containsEntry("display-price", 8.95D);
    }

    @Test
    public void a_path_evaluation_can_be_returned_as_PATH_LIST() {
        Configuration conf = Configuration.builder().options(AS_PATH_LIST).build();
        List<String> pathList = using(conf).parse(BaseTestJson.JSON_DOCUMENT, false).read("$..author");
        assertThat(pathList).containsExactly("$['store']['book'][0]['author']", "$['store']['book'][1]['author']", "$['store']['book'][2]['author']", "$['store']['book'][3]['author']");
    }

    @Test(expected = ClassCastException.class)
    public void class_cast_exception_is_thrown_when_return_type_is_not_expected() {
        List<String> list = reader.read("$.store.book[0].author");
    }
}