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Introduce StringUtils.truncate()

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StringUtils.truncate() serves as central, consistent way for truncating
strings used in log messages and exception failure messages, for
immediate use in LogFormatUtils and ObjectUtils.

See gh-30286
Closes gh-30290
This commit is contained in:
Sam Brannen
2023-04-05 12:15:35 +02:00
parent 1734deca1e
commit 8161316b1d
3 changed files with 67 additions and 2 deletions
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24
spring-core/src/test/java/org/springframework/util/StringUtilsTests.java
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@@ -22,6 +22,8 @@ import java.util.Locale;
import java.util.Properties;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
@@ -757,4 +759,26 @@ class StringUtilsTests {
assertThat(StringUtils.collectionToCommaDelimitedString(Collections.singletonList(null))).isEqualTo("null");
}
@Test
void truncatePreconditions() {
assertThatIllegalArgumentException()
.isThrownBy(() -> StringUtils.truncate("foo", 0))
.withMessage("Truncation threshold must be a positive number: 0");
assertThatIllegalArgumentException()
.isThrownBy(() -> StringUtils.truncate("foo", -99))
.withMessage("Truncation threshold must be a positive number: -99");
}
@ParameterizedTest
@CsvSource(delimiterString = "-->", textBlock = """
aardvark --> aardvark
aardvark12 --> aardvark12
aardvark123 --> aardvark12 (truncated)...
aardvark, bird, cat --> aardvark, (truncated)...
"""
)
void truncate(String text, String truncated) {
assertThat(StringUtils.truncate(text, 10)).isEqualTo(truncated);
}
}