Android 单元测试开始

Question

我已经阅读了很多文章并尝试使用 Roboelectric 开始单元测试，但我仍然不明白并且无法编写简单的单元测试。任何人都可以指导我使用什么以及如何开始，因为在 android 中进行单元测试并不容易。

Answer 1

我也遇到了与之前相同的问题，我在 android 中获得了用于单元测试的模块。这是一个可能对您有所帮助的简单示例。我已尽力帮助您。您只需运行EmailValidatorTest 类即可查看测试结果。对于 assert(JUnit) 你可以遵循Assert。这是 XML。

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#F0F0F0"
android:orientation="vertical" >

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="10dp"
    android:text="@string/lbl_register"
    android:textAllCaps="true"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:textColor="#176CEC"
    android:textStyle="bold" />

<EditText
    android:id="@+id/editText_email"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#fff"
    android:ems="10"
    android:hint="@string/lbl_email_hint"
    android:inputType="textEmailAddress"
    android:padding="12dp" />

<EditText
    android:id="@+id/editText_password"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="1dp"
    android:background="#fff"
    android:ems="10"
    android:hint="@string/lbl_password_hint"
    android:inputType="textPassword"
    android:padding="12dp" />

<Button
    android:id="@+id/btn_signup"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="20dp"
    android:background="#176CEC"
    android:text="@string/lbl_btn_signup"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:textColor="#fff"
    android:textStyle="bold" />

这是我的主要活动

package com.example.hassidiczaddic.unittesting;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.example.hassidiczaddic.unittesting.R;
public class MainActivity extends Activity {
private EditText emailEditText;
private EditText passEditText;
private Button btnsignup;
private EmailValidator mEmailValidator;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    emailEditText = (EditText) findViewById(R.id.editText_email);
    passEditText = (EditText) findViewById(R.id.editText_password);
    // Setup field validators.
    mEmailValidator = new EmailValidator();
    emailEditText.addTextChangedListener(mEmailValidator);
    passEditText.addTextChangedListener(mEmailValidator);


btnsignup=(Button)findViewById(R.id.btn_signup);
    btnsignup.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {


            // Don't save if the fields do not validate.
            if (!mEmailValidator.isValid()) {
                emailEditText.setError("Invalid email or Password");
                Log.w("TAG", "Invalid email");
                return;
            }else
                Toast.makeText(MainActivity.this,"Satrun is dead",Toast.LENGTH_SHORT).show();
        }
    });




}

}

这是我的 EmailValidator 类

package com.example.hassidiczaddic.unittesting;
import android.app.Activity;
import android.text.Editable;
import android.text.TextWatcher;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class EmailValidator implements TextWatcher {

/**
 * Email validation pattern.
 */
// validating email id
public static final Pattern EMAIL_PATTERN = Pattern.compile(
        "[a-zA-Z0-9\\+\\.\\_\\%\\-\\+]{1,256}" +
                "\\@" +
                "[a-zA-Z0-9][a-zA-Z0-9\\-]{0,64}" +
                "(" +
                "\\." +
                "[a-zA-Z0-9][a-zA-Z0-9\\-]{0,25}" +
                ")+"
);

// validating password with retype password
private boolean isValidPassword(String pass) {
    if (pass != null && pass.length() > 6) {
        return true;
    }
    return false;
}

private boolean mIsValid = false;

public boolean isValid() {
    return mIsValid;
}

public static boolean isValidEmail(CharSequence email) {
    return email != null && EMAIL_PATTERN.matcher(email).matches();
}

public static boolean isValidPassword(CharSequence pass) {
    return pass != null && isValidPassword(pass);
}

@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {

}

@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {

}

@Override
public void afterTextChanged(Editable editableText) {
 mIsValid=isValidEmail(editableText);
    mIsValid=isValidPassword(editableText);
}
}

这是我在 android 中的 UnitTesting：

package com.example.hassidiczaddic.unittesting;
import android.test.suitebuilder.annotation.SmallTest;
import org.junit.Test;
import static org.junit.Assert.*;
@SmallTest
public class EmailValidatorTest {
@Test
public void emailValidator_CorrectEmailSimple_ReturnsTrue() {
    assertTrue(EmailValidator.isValidEmail("name_@email.com"));
}

@Test
public void emailValidator_CorrectEmailSubDomain_ReturnsTrue() {
    assertTrue(EmailValidator.isValidEmail("name@email.co.uk"));
}

@Test
public void emailValidator_InvalidEmailNoTld_ReturnsFalse() {
    assertFalse(EmailValidator.isValidEmail("name@email"));
}

@Test
public void emailValidator_InvalidEmailDoubleDot_ReturnsFalse() {
    assertFalse(EmailValidator.isValidEmail("name@email..com"));
}

@Test
public void emailValidator_InvalidEmailNoUsername_ReturnsFalse() {
    assertFalse(EmailValidator.isValidEmail("@email.com"));
}

@Test
public void emailValidator_EmptyString_ReturnsFalse() {
    assertFalse(EmailValidator.isValidEmail(""));
}

@Test
public void emailValidator_NullEmail_ReturnsFalse() {
    assertFalse(EmailValidator.isValidEmail(null));
}


@Test
public void passwordValidator_NullPassword_ReturnsFalse(){
    assertFalse(EmailValidator.isValidPassword(null));

    //other testcases for passwords
}}

不要忘记使用以下命令同步您的 Gradle：

// Required -- JUnit 4 framework
testCompile 'junit:junit:4.12'