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Simple-Calculator
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Code Issues Packages Projects Releases Wiki Activity

add a couple tests + minor refactoring

This commit is contained in:
tibbi 2015-12-28 19:26:38 +01:00
parent b0f64390dd
commit 95d3b31102
4 changed files with 68 additions and 28 deletions
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11
app/src/main/java/calculator/simplemobiletools/com/simple_calculator/Formatter.java
View File

@ -1,13 +1,22 @@
package calculator.simplemobiletools.com.simple_calculator;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.Locale;
public class Formatter {
public static String doubleToString(double d) {
if (d == (long) d) {
return String.format("%d", (long) d);
} else {
final DecimalFormat formatter = new DecimalFormat("0.0#############");
final DecimalFormatSymbols symbols = new DecimalFormatSymbols(Locale.US);
symbols.setDecimalSeparator('.');
final DecimalFormat formatter = new DecimalFormat();
formatter.setMaximumIntegerDigits(12);
formatter.setMaximumFractionDigits(12);
formatter.setDecimalFormatSymbols(symbols);
formatter.setGroupingUsed(false);
return formatter.format(d);
}
}

56
app/src/main/java/calculator/simplemobiletools/com/simple_calculator/MainActivity.java
View File

@ -19,14 +19,14 @@ public class MainActivity extends AppCompatActivity {
private int lastKey;
private int lastOperation;
private static final int DIGIT = 0;
private static final int EQUALS = 1;
private static final int PLUS = 2;
private static final int MINUS = 3;
private static final int MULTIPLY = 4;
private static final int DIVIDE = 5;
private static final int MODULO = 6;
private static final int POWER = 7;
public static final int DIGIT = 0;
public static final int EQUALS = 1;
public static final int PLUS = 2;
public static final int MINUS = 3;
public static final int MULTIPLY = 4;
public static final int DIVIDE = 5;
public static final int MODULO = 6;
public static final int POWER = 7;
@Override
protected void onCreate(Bundle savedInstanceState) {
@ -42,13 +42,17 @@ public class MainActivity extends AppCompatActivity {
resetValue = false;
lastKey = 0;
lastOperation = 0;
result.setText("0");
setResult("0");
}
private void addDigit(int number) {
public void addDigit(int number) {
final String currentValue = getDisplayedNumber();
final String newValue = removeLeadingZero(currentValue + number);
result.setText(newValue);
setResult(newValue);
}
public void setResult(String value) {
result.setText(value);
}
private String removeLeadingZero(String str) {
@ -57,17 +61,16 @@ public class MainActivity extends AppCompatActivity {
}
private String getDisplayedNumber() {
resetValueIfNeeded();
return result.getText().toString();
}
private double getDisplayedNumberAsDouble() {
return Double.parseDouble(result.getText().toString());
public double getDisplayedNumberAsDouble() {
return Double.parseDouble(getDisplayedNumber());
}
private void resetValueIfNeeded() {
if (resetValue)
result.setText("0");
setResult("0");
resetValue = false;
}
@ -95,13 +98,13 @@ public class MainActivity extends AppCompatActivity {
updateResult(resultValue);
}
private void handleOperation(int operation) {
public void handleOperation(int operation) {
if (lastKey == operation)
return;
if (lastKey == DIGIT) {
if (lastKey == DIGIT)
getResult();
}
resetValue = true;
lastKey = operation;
lastOperation = operation;
@ -161,7 +164,7 @@ public class MainActivity extends AppCompatActivity {
if (newValue.equals("-0"))
newValue = "0";
result.setText(newValue);
setResult(newValue);
baseValue = Double.parseDouble(newValue);
}
@ -188,28 +191,28 @@ public class MainActivity extends AppCompatActivity {
String value = getDisplayedNumber();
if (!value.contains("."))
value += ".";
result.setText(value);
setResult(value);
}
public void zeroClicked() {
String value = getDisplayedNumber();
if (!value.equals("0"))
value += "0";
result.setText(value);
setResult(value);
}
private void updateResult(double value) {
result.setText(Formatter.doubleToString(value));
setResult(Formatter.doubleToString(value));
baseValue = value;
}
private void getResult() {
public void getResult() {
secondValue = getDisplayedNumberAsDouble();
calculateResult();
baseValue = getDisplayedNumberAsDouble();
}
private void calculateResult() {
public void calculateResult() {
switch (lastOperation) {
case PLUS:
updateResult(baseValue + secondValue);
@ -234,12 +237,13 @@ public class MainActivity extends AppCompatActivity {
}
}
@OnClick({R.id.btn_decimal, R.id.btn_0, R.id.btn_1, R.id.btn_2, R.id.btn_3, R.id.btn_4, R.id.btn_5, R.id.btn_6, R.id.btn_7,
R.id.btn_8, R.id.btn_9})
@OnClick({R.id.btn_decimal, R.id.btn_0, R.id.btn_1, R.id.btn_2, R.id.btn_3, R.id.btn_4, R.id.btn_5, R.id.btn_6, R.id.btn_7, R.id.btn_8,
R.id.btn_9})
public void numpadClicked(View view) {
if (lastKey == EQUALS)
lastOperation = EQUALS;
lastKey = DIGIT;
resetValueIfNeeded();
switch (view.getId()) {
case R.id.btn_decimal:

1
app/src/main/res/layout/activity_main.xml
View File

@ -17,7 +17,6 @@
android:layout_marginBottom="@dimen/activity_margin"
android:gravity="right"
android:lines="1"
android:maxLength="15"
android:padding="@dimen/activity_margin"
android:text="0"
android:textSize="@dimen/display_text_size"/>

28
app/src/test/java/calculator/simplemobiletools/com/simple_calculator/MainActivityTest.java
View File

@ -1,10 +1,15 @@
package calculator.simplemobiletools.com.simple_calculator;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.Robolectric;
import org.robolectric.annotation.Config;
import butterknife.ButterKnife;
import static junit.framework.Assert.assertEquals;
@RunWith(MyTestRunner.class)
@Config(constants = BuildConfig.class, manifest = "app/src/main/AndroidManifest.xml", sdk = 21)
public class MainActivityTest {
@ -13,5 +18,28 @@ public class MainActivityTest {
@Before
public void setUp() {
activity = Robolectric.setupActivity(MainActivity.class);
ButterKnife.bind(activity);
}
@Test
public void addSimpleDigit() {
activity.addDigit(2);
assertEquals(2.0, activity.getDisplayedNumberAsDouble());
}
@Test
public void removeLeadingZero() {
activity.addDigit(0);
activity.addDigit(5);
assertEquals(5.0, activity.getDisplayedNumberAsDouble());
}
@Test
public void addition_test() {
activity.setResult("-1.2");
activity.handleOperation(MainActivity.PLUS);
activity.setResult("3.4");
activity.getResult();
assertEquals(2.2, activity.getDisplayedNumberAsDouble());
}
}