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BAEL-3141: Created new module for 'Converting Java String to Double' and other newly created string articles. (#7548)

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This commit is contained in:
Justin Albano
2019-08-10 12:40:34 -04:00
committed by maibin
parent efd0d81ac5
commit b891c53dcc
7 changed files with 245 additions and 56 deletions
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56
java-strings-2/src/test/java/com/baeldung/string/todouble/StringToDoubleConversionUnitTest.java
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@@ -1,56 +0,0 @@
package com.baeldung.string.todouble;
import static org.junit.Assert.assertEquals;
import java.text.DecimalFormat;
import java.text.ParseException;
import org.junit.Test;
public class StringToDoubleConversionUnitTest {
@Test
public void givenValidString_WhenParseDouble_ThenResultIsPrimitiveDouble() {
assertEquals(1.23, Double.parseDouble("1.23"), 0.000001);
}
@Test(expected = NullPointerException.class)
public void givenNullString_WhenParseDouble_ThenNullPointerExceptionIsThrown() {
Double.parseDouble(null);
}
@Test(expected = NumberFormatException.class)
public void givenInalidString_WhenParseDouble_ThenNumberFormatExceptionIsThrown() {
Double.parseDouble("&");
}
@Test
public void givenValidString_WhenValueOf_ThenResultIsPrimitiveDouble() {
assertEquals(1.23, Double.valueOf("1.23"), 0.000001);
}
@Test(expected = NullPointerException.class)
public void givenNullString_WhenValueOf_ThenNullPointerExceptionIsThrown() {
Double.valueOf(null);
}
@Test(expected = NumberFormatException.class)
public void givenInalidString_WhenValueOf_ThenNumberFormatExceptionIsThrown() {
Double.valueOf("&");
}
@Test
public void givenValidString_WhenDecimalFormat_ThenResultIsValidDouble() throws ParseException {
assertEquals(1.23, new DecimalFormat("#").parse("1.23").doubleValue(), 0.000001);
}
@Test(expected = NullPointerException.class)
public void givenNullString_WhenDecimalFormat_ThenNullPointerExceptionIsThrown() throws ParseException {
new DecimalFormat("#").parse(null);
}
@Test(expected = ParseException.class)
public void givenInvalidString_WhenDecimalFormat_ThenParseExceptionIsThrown() throws ParseException {
new DecimalFormat("#").parse("&");
}
}