F08(?): Feil & testing!

Men først: AutoComplete

AutoCompleteTextView

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent">

    <AutoCompleteTextView
        android:id="@+id/countryAutoCompleteTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter a country">
    </AutoCompleteTextView>
</LinearLayout>

Autocomplete-adapter

AutoCompleteTextView countryAutoCompleteTextView = (AutoCompleteTextView)
        findViewById(R.id.countryAutoCompleteTextView);

final String[] countries = {
        "Norway",
        "Norfolk",
        "Ananas",
        "Andorra",
};

final ArrayAdapter<String> countriesAdapter = new ArrayAdapter<String>(
        this, android.R.layout.simple_list_item_1, countries);

countryAutoCompleteTextView.setAdapter(countriesAdapter);

Nøyaktig det samme som ListView

R.array.X

Teit med data i Java-koden(?)

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="countries">
        <item>Andorra</item>
        <item>United Arab Emirates</item>
        <item>Afghanistan</item>
    </string-array>
</resources>

final String[] countries = getResources().getStringArray(R.array.countries);

final String[] countries = {
        "Norway",
        "Norfolk",
        "Ananas",
        "Andorra",
};

Default ordering: samme rekkefølge som i arrayet

Other stuff

completionThreshold
<request-focus>

Demo
Time
Yay

Unntak(shåndtering)

Ting kan treffe vifta
Én tråd: UI
Én exception = crash
Bad reputation

Løsninger

ANR

Threads!
AsyncTask

"Has stopped"

Try
Catch
Finally

LOGG & si fra til bruker!

Testing!

Flere strategier

Black box
White box
Unit (enhetstesting)
Integrasjonstesting
Systemtesting
+++

TDD (Test Driven Development)

Back to basics: JUnit (3!)

// given
Calculator calculator = new Calculator();

// when
int result = calculator.add(2, 3);

// then
assertEquals(5, result);

public class CalculatorTestCase extends TestCase
{
    private Calculator calculator;

    @Override
    public void setUp()
    {
        calculator = new Calculator();
    }

    // ...
}

setUp() & tearDown()

setUp: før hver test
tearDown: etter hver test
Åpne/lukke nettverkstilkobling?

Tester

Begynner med "test", eks:
- testOnePlusOneEqualsTwo()
Ingen andre metoder er tester
Endret/penere i JUnit 4 (ikke Android)

Assert.*

Standard JUnit

assertNull / assertNotNull
assertTrue / assertFalse
assertSame / assertNotSame (reference)
assertEquals (value)

assert?

Eksempel: Calculator

package no.westerdals.autocomplete_demo;

import junit.framework.TestCase;

public class CalculatorTestCase extends TestCase
{
    private Calculator calculator;

    @Override
    public void setUp()
    {
        calculator = new Calculator();
    }

    public void testAddition()
    {
        int a = 2, b = 3;
        int expected = 5;

        int actual = calculator.add(2, 3);

        assertEquals(a + " + " + b + " should equal " + expected, expected, actual);
    }
}

Ideer til testing

http://developer.android.com/tools/testing/what_to_test.html

Orientation!

Config

System language
Keyboard availability

Battery life

External resources

Testing i Android

Bygger på JUnit
Ekstra Android-spesifikke API-er og tjenester
Testene kjører på device (eller i emulator)
- Endret de siste tre ukene
Eget test-prosjekt (også endret)

http://developer.android.com/tools/testing/testing_android.html

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