Question

我正在尝试为计算两个位置之间距离的函数编写测试用例。

var _stockByAreas = function() {

    var query = function(zone) {
        var queryDef = $q.defer();

        // timeout is for query and response simulations

        setTimeout(function() {
            // ...
            queryDef.resolve( {data: 'MeTe-30'} );
        }, 1000);
        return queryDef.promise;
    }

    var promises = [];

    angular.forEach(storageAreas, function(zone) {
        // ...
        promises.push( query(zone) );
    });

    return $q.all(promises);
}

_stockByAreas().then(function(res) {
    // res[0] resolved data by query function for  storageAreas[0]
    // res[1] resolved data by query function for  storageAreas[1]
    // ...
});

这是我要测试的public String calculateDistance(Place p) { if (p.distance > 0) { if (selectedPlace.distance > 1000) { return Long.toString(Math.round(p.distance) / 1000) + getString(R.string.km); } else { return Long.toString(Math.round(p.distance)) + getString(R.string.meter); } } else { Location locationA = new Location("Point A"); locationA.setLatitude(MainActivity.lat); locationA.setLongitude(MainActivity.lng); // locationA.setLatitude(30.050922); // locationA.setLongitude(31.243414); Location locationB = new Location("point B"); locationB.setLatitude(p.getLatitude()); locationB.setLongitude(p.getLongitude()); double actualDistance = locationA.distanceTo(locationB); if (actualDistance > 1000) { return Long.toString(Math.round(actualDistance) / 1000) + " " + getString(R.string.km_away); } else { return Long.toString(Math.round(actualDistance)) + " " + getString(R.string.meter_away); } } }

TestClass

即使改变实际距离，测试也会通过。

Answer 1

因为你写了你想得到NullPointerException。

@Test(expected = NullPointerException.class)

你的mapScreen是null所以你通过了测试，因为你期望NullpointerExceptoion

如果您希望测试失败，则可以使用fail方法，因此如果未发生NullPointerException，则测试失败并获得RED状态，否则测试通过并获得GREEN状态

fail(mapScreen.method());

导入：

import static org.junit.Assert.fail;

如果你不想在setUp中获得Null指针Exception init mapScreen：

@Before
public void setUp() throws Exception {

    place = new Place(30.050922 , 31.243414) ;

    mapScreen = new FullMapScreen() ;//your constructor
}

Android单元测试总是通过

1 个答案: