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Merge pull request #57 from Doha2012/master 

Add class GuavaStringTest
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Eugen 2014-10-19 01:03:24 +03:00
parent 5ce071d26d 48a8109931
commit 922eb787e0
1 changed files with 176 additions and 0 deletions
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guava/src/test/java/org/baeldung/guava/GuavaStringTest.java Normal file
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package org.baeldung.guava;
import static org.hamcrest.Matchers.contains;
import static org.hamcrest.Matchers.containsInAnyOrder;
import static org.hamcrest.Matchers.containsString;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import org.junit.Test;
import com.google.common.base.CharMatcher;
import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.base.Splitter;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
public class GuavaStringTest {
@Test
public void whenConvertListToString_thenConverted() {
final List<String> names = Lists.newArrayList("John", "Jane", "Adam", "Tom");
final String result = Joiner.on(",").join(names);
assertThat(Arrays.asList(result.split(",")), containsInAnyOrder("John", "Jane", "Adam", "Tom"));
}
@Test
public void whenConvertListToStringAndSkipNull_thenConverted() {
final List<String> names = Lists.newArrayList("John", null, "Jane", "Adam", "Tom");
final String result = Joiner.on(",").skipNulls().join(names);
assertThat(Arrays.asList(result.split(",")), containsInAnyOrder("John", "Jane", "Adam", "Tom"));
}
@Test
public void whenConvertMapToString_thenConverted() {
final Map<String, Integer> salary = Maps.newHashMap();
salary.put("John", 1000);
salary.put("Jane", 1500);
final String result = Joiner.on(" , ").withKeyValueSeparator(" = ").join(salary);
assertThat(result, containsString("John = 1000"));
assertThat(result, containsString("Jane = 1500"));
}
@Test
public void whenJoinNestedCollections_thenJoined() {
final List<ArrayList<String>> nested = Lists.newArrayList(Lists.newArrayList("apple", "banana", "orange"), Lists.newArrayList("cat", "dog", "bird"), Lists.newArrayList("John", "Jane", "Adam"));
final String result = Joiner.on(";").join(Iterables.transform(nested, new Function<List<String>, String>() {
@Override
public final String apply(final List<String> input) {
return Joiner.on("-").join(input);
}
}));
assertThat(result, containsString("apple-banana-orange"));
assertThat(result, containsString("cat-dog-bird"));
assertThat(result, containsString("apple-banana-orange"));
}
@Test
public void whenCreateListFromString_thenCreated() {
final String input = "apple - banana - orange";
final List<String> result = Splitter.on("-").trimResults().splitToList(input);
assertThat(result, contains("apple", "banana", "orange"));
}
@Test
public void whenCreateMapFromString_thenCreated() {
final String input = "John=first,Adam=second";
final Map<String, String> result = Splitter.on(",").withKeyValueSeparator("=").split(input);
assertEquals("first", result.get("John"));
assertEquals("second", result.get("Adam"));
}
@Test
public void whenSplitStringOnMultipleSeparator_thenSplit() {
final String input = "apple.banana,,orange,,.";
final List<String> result = Splitter.onPattern("[.|,]").omitEmptyStrings().splitToList(input);
assertThat(result, contains("apple", "banana", "orange"));
}
@Test
public void whenSplitStringOnSpecificLength_thenSplit() {
final String input = "Hello world";
final List<String> result = Splitter.fixedLength(3).splitToList(input);
assertThat(result, contains("Hel", "lo ", "wor", "ld"));
}
@Test
public void whenRemoveSpecialCharacters_thenRemoved(){
final String input = "H*el.lo,}12";
final CharMatcher matcher = CharMatcher.JAVA_LETTER_OR_DIGIT;
final String result = matcher.retainFrom(input);
assertEquals("Hello12", result);
}
@Test
public void whenRemoveNonASCIIChars_thenRemoved() {
final String input = "あhello₤";
String result = CharMatcher.ASCII.retainFrom(input);
assertEquals("hello", result);
result = CharMatcher.inRange('0', 'z').retainFrom(input);
assertEquals("hello", result);
}
@Test
public void whenValidateString_thenValid() {
final String input = "hello";
boolean result = CharMatcher.JAVA_LOWER_CASE.matchesAllOf(input);
assertTrue(result);
result = CharMatcher.is('e').matchesAnyOf(input);
assertTrue(result);
result = CharMatcher.JAVA_DIGIT.matchesNoneOf(input);
assertTrue(result);
}
@Test
public void whenTrimString_thenTrimmed() {
final String input = "---hello,,,";
String result = CharMatcher.is('-').trimLeadingFrom(input);
assertEquals("hello,,,", result);
result = CharMatcher.is(',').trimTrailingFrom(input);
assertEquals("---hello", result);
result = CharMatcher.anyOf("-,").trimFrom(input);
assertEquals("hello", result);
}
@Test
public void whenCollapseFromString_thenCollapsed() {
final String input = " hel lo ";
String result = CharMatcher.is(' ').collapseFrom(input, '-');
assertEquals("-hel-lo-", result);
result = CharMatcher.is(' ').trimAndCollapseFrom(input, '-');
assertEquals("hel-lo", result);
}
@Test
public void whenCountCharInString_thenCorrect() {
final String input = "a, c, z, 1, 2";
int result = CharMatcher.is(',').countIn(input);
assertEquals(4, result);
result = CharMatcher.inRange('a', 'h').countIn(input);
assertEquals(2, result);
}
}