JsonPath/json-path/src/test/java/com/jayway/jsonpath/old/NullHandlingTest.java

package com.jayway.jsonpath.old;

import com.jayway.jsonpath.Configuration;
import com.jayway.jsonpath.JsonPath;
import com.jayway.jsonpath.Option;
import com.jayway.jsonpath.PathNotFoundException;
import org.assertj.core.api.Assertions;
import org.junit.Test;

import java.util.List;

import static junit.framework.Assert.assertEquals;
import static junit.framework.Assert.assertNull;

public class NullHandlingTest {

    public static final String DOCUMENT = "{\n" +
            "   \"root-property\": \"root-property-value\",\n" +
            "   \"root-property-null\": null,\n" +
            "   \"children\": [\n" +
            "      {\n" +
            "         \"id\": 0,\n" +
            "         \"name\": \"name-0\",\n" +
            "         \"age\": 0\n" +
            "      },\n" +
            "      {\n" +
            "         \"id\": 1,\n" +
            "         \"name\": \"name-1\",\n" +
            "         \"age\": null" +
            "      },\n" +
            "      {\n" +
            "         \"id\": 3,\n" +
            "         \"name\": \"name-3\"\n" +
            "      }\n" +
            "   ]\n" +
            "}";


    @Test(expected = PathNotFoundException.class)
    public void not_defined_property_throws_PathNotFoundException() {
        JsonPath.read(DOCUMENT, "$.children[0].child.age");
    }


    @Test
    public void last_token_defaults_to_null() {
        Configuration configuration = Configuration.builder().options(Option.DEFAULT_PATH_LEAF_TO_NULL).build();

        assertNull(JsonPath.parse(DOCUMENT, configuration).read("$.children[2].age"));
    }


    @Test
    public void null_property_returns_null() {
        Integer age = JsonPath.read(DOCUMENT, "$.children[1].age");
        assertEquals(null, age);
    }

    @Test
    public void the_age_of_all_with_age_defined() {
        //List<Integer> result = JsonPath.read(DOCUMENT, "$.children[*].age");
        List<Integer> result = JsonPath.using(Configuration.defaultConfiguration().setOptions(Option.SUPPRESS_EXCEPTIONS)).parse(DOCUMENT).read("$.children[*].age");

        Assertions.assertThat(result).containsSequence(0, null);

    }

    @Test
    public void path2() {
        List<Object> result = JsonPath.read("{\"a\":[{\"b\":1,\"c\":2},{\"b\":5,\"c\":2}]}", "a[?(@.b==4)].c");
        Assertions.assertThat(result).isEmpty();
    }

    @Test
    public void path() {
        String json = "{\"a\":[{\"b\":1,\"c\":2},{\"b\":5,\"c\":2}]}";

        List<Object> result = JsonPath.using(Configuration.defaultConfiguration().setOptions(Option.DEFAULT_PATH_LEAF_TO_NULL)).parse(json).read("a[?(@.b==5)].d");

        Assertions.assertThat(result).hasSize(1);
        Assertions.assertThat(result.get(0)).isNull();

    }


}