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Add test cases for StringUtil. (#10074)

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Motivation:

StringUtil needs more test cases.

Modification:

Add several test cases for StringUtil.

Result:

Improve test coverage slightly.
This commit is contained in:
feijermu 2020-03-03 17:57:41 +08:00 committed by GitHub
parent 7fce06a0d1
commit 7ab68adbe8
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1 changed files with 42 additions and 0 deletions
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42
common/src/test/java/io/netty/util/internal/StringUtilTest.java
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@ -22,6 +22,9 @@ import java.util.Collections;
import static io.netty.util.internal.StringUtil.NEWLINE;
import static io.netty.util.internal.StringUtil.commonSuffixOfLength;
import static io.netty.util.internal.StringUtil.indexOfWhiteSpace;
import static io.netty.util.internal.StringUtil.indexOfNonWhiteSpace;
import static io.netty.util.internal.StringUtil.isNullOrEmpty;
import static io.netty.util.internal.StringUtil.simpleClassName;
import static io.netty.util.internal.StringUtil.substringAfter;
import static io.netty.util.internal.StringUtil.toHexString;
@ -549,4 +552,43 @@ public class StringUtilTest {
StringUtil.join(",", Arrays.asList("a", "b", "c", null, "d")).toString());
}
@Test
public void testIsNullOrEmpty() {
assertTrue(isNullOrEmpty(null));
assertTrue(isNullOrEmpty(""));
assertTrue(isNullOrEmpty(StringUtil.EMPTY_STRING));
assertFalse(isNullOrEmpty(" "));
assertFalse(isNullOrEmpty("\t"));
assertFalse(isNullOrEmpty("\n"));
assertFalse(isNullOrEmpty("foo"));
assertFalse(isNullOrEmpty(NEWLINE));
}
@Test
public void testIndexOfWhiteSpace() {
assertEquals(-1, indexOfWhiteSpace("", 0));
assertEquals(0, indexOfWhiteSpace(" ", 0));
assertEquals(-1, indexOfWhiteSpace(" ", 1));
assertEquals(0, indexOfWhiteSpace("\n", 0));
assertEquals(-1, indexOfWhiteSpace("\n", 1));
assertEquals(0, indexOfWhiteSpace("\t", 0));
assertEquals(-1, indexOfWhiteSpace("\t", 1));
assertEquals(3, indexOfWhiteSpace("foo\r\nbar", 1));
assertEquals(-1, indexOfWhiteSpace("foo\r\nbar", 10));
assertEquals(7, indexOfWhiteSpace("foo\tbar\r\n", 6));
assertEquals(-1, indexOfWhiteSpace("foo\tbar\r\n", Integer.MAX_VALUE));
}
@Test
public void testIndexOfNonWhiteSpace() {
assertEquals(-1, indexOfNonWhiteSpace("", 0));
assertEquals(-1, indexOfNonWhiteSpace(" ", 0));
assertEquals(-1, indexOfNonWhiteSpace(" \t", 0));
assertEquals(-1, indexOfNonWhiteSpace(" \t\r\n", 0));
assertEquals(2, indexOfNonWhiteSpace(" \tfoo\r\n", 0));
assertEquals(2, indexOfNonWhiteSpace(" \tfoo\r\n", 1));
assertEquals(4, indexOfNonWhiteSpace(" \tfoo\r\n", 4));
assertEquals(-1, indexOfNonWhiteSpace(" \tfoo\r\n", 10));
assertEquals(-1, indexOfNonWhiteSpace(" \tfoo\r\n", Integer.MAX_VALUE));
}
}