Sample Android Problem

Name

Temperature Converter

Description

Create a simple Calculator app with the following specifications.

Activity name should be 'MainActivity'
EditText field, where the expression and the final answer is displayed, should have the id 'text'
Each of the Buttons should have the following id's0 : zero
1 : one
2 : two
3 : three
4 : four
5 : five
6 : six
7 : seven
8 : eight
9 : nine
. : point
Del : delete // deletes the last entered value
÷ : divide
* : multiply
- : subtract
+ : add
= : equal // computes the final value of the
          // expression and updates the EditText field.
          // At least one decimal place should be
          // displayed
Clear : clear // clears the expression in the
              // EditText field

Note

• If you want to build the app using your local IDE, please download the default android source code and make your changes in it.
• The package name should be 'com.doselect.androidapp'
• Do not modify 'build.gradle', 'app/build.gradle', 'gradle.properties' and 'settings.gradle'. These are provided for local testing only. These configurations are used while building the app on our servers.
• The maximum number of submissions is 5. So make sure you take your time in checking your code before submitting.

Mockup

Testcases

package com.doselect.androidapp;

import android.content.Context;
import android.content.DialogInterface;
import android.support.test.InstrumentationRegistry;
import android.support.test.espresso.core.deps.guava.base.Strings;
import android.support.test.rule.ActivityTestRule;
import android.support.test.runner.AndroidJUnit4;

import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;

import tools.fastlane.screengrab.Screengrab;

import static android.support.test.espresso.Espresso.onView;
import static android.support.test.espresso.action.ViewActions.click;
import static android.support.test.espresso.action.ViewActions.closeSoftKeyboard;
import static android.support.test.espresso.action.ViewActions.typeText;
import static android.support.test.espresso.assertion.ViewAssertions.doesNotExist;
import static android.support.test.espresso.assertion.ViewAssertions.matches;
import static android.support.test.espresso.matcher.ViewMatchers.isDisplayed;
import static android.support.test.espresso.matcher.ViewMatchers.withId;
import static android.support.test.espresso.matcher.ViewMatchers.withText;
import static org.junit.Assert.*;

/**
 * Instrumentation test, which will execute on an Android device.
 *
 * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
 */
@RunWith(AndroidJUnit4.class)
public class ApplicationTest {

    public static final String FIRST_ANSWER = "8.0";
    public static final String SECOND_ANSWER = "-1.0";

    @Rule
    public ActivityTestRule<MainActivity> mActivityRule = new ActivityTestRule<MainActivity>(MainActivity.class);

    @Test
    public void useAppContext() throws Exception {
        // Context of the app under test.
        Context appContext = InstrumentationRegistry.getTargetContext();

        assertEquals("com.doselect.androidapp", appContext.getPackageName());

    }

    @Test
    public void testCalculator() throws Exception {

        onView(withId(R.id.text)).check(matches(isDisplayed()));
        onView(withId(R.id.zero)).check(matches(isDisplayed()));
        onView(withId(R.id.one)).check(matches(isDisplayed()));
        onView(withId(R.id.two)).check(matches(isDisplayed()));
        onView(withId(R.id.three)).check(matches(isDisplayed()));
        onView(withId(R.id.four)).check(matches(isDisplayed()));
        onView(withId(R.id.five)).check(matches(isDisplayed()));
        onView(withId(R.id.six)).check(matches(isDisplayed()));
        onView(withId(R.id.seven)).check(matches(isDisplayed()));
        onView(withId(R.id.eight)).check(matches(isDisplayed()));
        onView(withId(R.id.nine)).check(matches(isDisplayed()));
        onView(withId(R.id.point)).check(matches(isDisplayed()));
        onView(withId(R.id.delete)).check(matches(isDisplayed()));
        onView(withId(R.id.equal)).check(matches(isDisplayed()));
        onView(withId(R.id.clear)).check(matches(isDisplayed()));
        onView(withId(R.id.divide)).check(matches(isDisplayed()));
        onView(withId(R.id.multiply)).check(matches(isDisplayed()));
        onView(withId(R.id.subtract)).check(matches(isDisplayed()));
        onView(withId(R.id.add)).check(matches(isDisplayed()));

        Screengrab.screenshot("1");

        onView(withId(R.id.two)).perform(click());
        Screengrab.screenshot("2");
        onView(withId(R.id.multiply)).perform(click());
        Screengrab.screenshot("3");
        onView(withId(R.id.four)).perform(click());
        Screengrab.screenshot("4");
        onView(withId(R.id.equal)).perform(click());
        Screengrab.screenshot("5");
        onView(withId(R.id.text)).check(matches(withText(FIRST_ANSWER)));

        onView(withId(R.id.clear)).perform(click());
        Screengrab.screenshot("6");
        onView(withId(R.id.five)).perform(click());
        Screengrab.screenshot("7");
        onView(withId(R.id.subtract)).perform(click());
        Screengrab.screenshot("8");
        onView(withId(R.id.six)).perform(click());
        Screengrab.screenshot("9");
        onView(withId(R.id.equal)).perform(click());
        Screengrab.screenshot("10");
        onView(withId(R.id.text)).check(matches(withText(SECOND_ANSWER)));

    }
}