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package ai.vespa.json;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
/**
* @author bjorncs
*/
class JsonTest {
@Test
void parses_json_correctly() {
var text =
"""
{
"string": "bar",
"integer": 42,
"floaty": 8.25,
"bool": true,
"array": [1, 2, 3],
"quux": {
"corge": "grault"
},
"timestamp": "2021-06-01T12:00:00Z"
}
""";
var json = Json.of(text);
// Primitive members
assertEquals("bar", json.f("string").asString());
assertTrue(json.f("string").asOptionalString().isPresent());
assertEquals("bar", json.f("string").asOptionalString().get());
assertEquals(42L, json.f("integer").asLong());
assertEquals(42D, json.f("integer").asDouble());
assertEquals(8.25D, json.f("floaty").asDouble());
assertEquals(8L, json.f("floaty").asLong());
assertTrue(json.f("bool").asBool());
assertEquals("2021-06-01T12:00:00Z", json.f("timestamp").asInstant().toString());
// Array member
assertEquals(3, json.f("array").length());
assertEquals(1L, json.f("array").entry(0).asLong());
assertEquals(2L, json.f("array").entry(1).asLong());
assertEquals(3L, json.f("array").entry(2).asLong());
json.f("array").forEachEntry((i, entry) -> assertEquals(i + 1, entry.asLong()));
int counter = 0;
for (var entry : json.f("array")) {
assertEquals(++counter, entry.asLong());
}
// Object member
assertEquals("grault", json.f("quux").f("corge").asString());
json.f("quux").forEachField((name, child) -> {
assertEquals("corge", name);
assertEquals("grault", child.asString());
});
}
@Test
void throws_on_missing_and_invalid_members() {
var text =
"""
{
"string": "bar"
}
""";
var json = Json.of(text);
var exception = assertThrows(InvalidJsonException.class, () -> json.f("unknown").asString());
assertEquals("Missing JSON member 'unknown'", exception.getMessage());
exception = assertThrows(InvalidJsonException.class, () -> json.a(0));
assertEquals("Expected JSON to be a 'array' but got 'object'", exception.getMessage());
exception = assertThrows(InvalidJsonException.class, () -> json.f("string").f("unknown"));
assertEquals("Expected JSON member 'string' to be a 'object' but got 'string'", exception.getMessage());
exception = assertThrows(InvalidJsonException.class, () -> json.f("string").asLong());
assertEquals("Expected JSON member 'string' to be a 'integer' or 'float' but got 'string'", exception.getMessage());
exception = assertThrows(InvalidJsonException.class, () -> json.f("string").asInstant());
assertEquals("Expected JSON member 'string' to be a valid timestamp: Text 'bar' could not be parsed at index 0", exception.getMessage());
}
@Test
void fallback_to_default_if_field_missing() {
var text =
"""
{
"string": "bar"
}
""";
var json = Json.of(text);
assertEquals("foo", json.f("unknown").asString("foo"));
assertEquals("foo", json.f("unknown").asOptionalString().orElse("foo"));
assertEquals("bar", json.f("string").asString("foo"));
assertEquals("bar", json.f("string").asOptionalString().orElse("foo"));
}
@Test
void builds_expected_json() {
var expected =
"""
{
"string": "bar",
"integer": 42,
"floaty": 8.25,
"bool": true,
"array": [
1,
2,
3
],
"quux": {
"corge": "grault"
}
}
""";
var json = Json.Builder.newObject()
.set("string", "bar")
.set("integer", 42)
.set("floaty", 8.25)
.set("bool", true)
.set("array", Json.Builder.newArray().add(1).add(2).add(3))
.set("quux", Json.Builder.newObject().set("corge", "grault"))
.build()
.toJson(true);
assertEquals(expected, json);
}
}
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