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Create tests for StringUtils#getStackTrace and StringUtils#getDifference
- Create tests - Make StringUtils final with private constructor (utility class)
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@ -10,10 +10,14 @@ import java.io.StringWriter;
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/**
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* Utility class for String operations.
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*/
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public class StringUtils {
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public final class StringUtils {
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public static final String newline = System.getProperty("line.separator");
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private StringUtils() {
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// Utility class
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}
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/**
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* Get the difference of two strings.
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*
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@ -6,7 +6,9 @@ import java.net.MalformedURLException;
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import java.util.Arrays;
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import java.util.List;
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import static org.hamcrest.Matchers.greaterThan;
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import static org.hamcrest.Matchers.equalTo;
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import static org.hamcrest.Matchers.stringContainsInOrder;
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import static org.junit.Assert.assertFalse;
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import static org.junit.Assert.assertThat;
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import static org.junit.Assert.assertTrue;
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@ -97,4 +99,32 @@ public class StringUtilsTest {
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// then
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assertThat(result, equalTo("[MalformedURLException]: Unrecognized URL format"));
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}
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@Test
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public void shouldPrintStackTrace() {
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// given
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MalformedURLException ex = new MalformedURLException("Unrecognized URL format");
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// when
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String result = StringUtils.getStackTrace(ex);
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// then
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assertThat(result, stringContainsInOrder(getClass().getName()));
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}
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@Test
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public void shouldGetDifferenceWithNullString() {
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// given/when/then
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assertThat(StringUtils.getDifference(null, "test"), equalTo(1.0));
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assertThat(StringUtils.getDifference("test", null), equalTo(1.0));
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assertThat(StringUtils.getDifference(null, null), equalTo(1.0));
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}
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@Test
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public void shouldGetDifferenceBetweenTwoString() {
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// given/when/then
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assertThat(StringUtils.getDifference("test", "taste"), equalTo(0.4));
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assertThat(StringUtils.getDifference("test", "bear"), equalTo(0.75));
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assertThat(StringUtils.getDifference("test", "something"), greaterThan(0.88));
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}
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}
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