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[COLLECTIONS-812] Open both streams with try-with-resources, and assert that only the text is the same, not the time

This commit is contained in:
Bruno P. Kinoshita 2022-05-01 11:57:40 +12:00
parent bc326f8ef5
commit 1677daceab
2 changed files with 32 additions and 27 deletions
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3
src/changes/changes.xml
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@ -94,6 +94,9 @@
<action issue="COLLECTIONS-802" type="fix" dev="kinow" due-to="samabcde, Ben Manes">
ReferenceMap iterator remove violates contract #300.
</action>
<action issue="COLLECTIONS-812" type="fix" dev="kinow" due-to="Ng Tsz Sum">
Fix flaky EmptyPropertiesTest#testSave.
</action>
<!-- ADD -->
<action issue="COLLECTIONS-760" dev="kinow" type="add" due-to="Isira Seneviratne">
Add tests for MapUtils.

56
src/test/java/org/apache/commons/collections4/properties/EmptyPropertiesTest.java
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@ -17,12 +17,20 @@
package org.apache.commons.collections4.properties;
import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotEquals;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.fail;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.Properties;
@ -31,15 +39,6 @@ import org.apache.commons.io.input.NullReader;
import org.apache.commons.lang3.ArrayUtils;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertArrayEquals;
public class EmptyPropertiesTest {
@Test
@ -259,26 +258,29 @@ public class EmptyPropertiesTest {
@Test
public void testSave() throws IOException {
final String comments = "Hello world!";
// actual
try (ByteArrayOutputStream actual = new ByteArrayOutputStream()) {
PropertiesFactory.EMPTY_PROPERTIES.save(actual, comments);
try (ByteArrayOutputStream actual = new ByteArrayOutputStream(); ByteArrayOutputStream expected = new ByteArrayOutputStream()) {
// actual
PropertiesFactory.EMPTY_PROPERTIES.store(actual, comments);
// expected
try (ByteArrayOutputStream expected = new ByteArrayOutputStream()) {
PropertiesFactory.INSTANCE.createProperties().save(expected, comments);
PropertiesFactory.INSTANCE.createProperties().store(expected, comments);
// Properties.save stores the specified comment appended with current time stamp in the next line
String expectedComment = getFirstLine(expected.toString("UTF-8"));
String actualComment = getFirstLine(actual.toString("UTF-8"));
assertEquals(expectedComment, actualComment, () ->
String.format("Expected String '%s' with length '%s'", expectedComment, expectedComment.length()));
expected.reset();
try (PrintStream out = new PrintStream(expected)) {
new Properties().save(out, comments);
}
assertArrayEquals(expected.toByteArray(), actual.toByteArray(), expected::toString);
} catch (UnsupportedEncodingException e) {
fail(e.getMessage(), e);
// Properties.store stores the specified comment appended with current time stamp in the next line
String expectedComment = getFirstLine(expected.toString("UTF-8"));
String actualComment = getFirstLine(actual.toString("UTF-8"));
assertEquals(expectedComment, actualComment, () ->
String.format("Expected String '%s' with length '%s'", expectedComment, expectedComment.length()));
expected.reset();
try (PrintStream out = new PrintStream(expected)) {
new Properties().store(out, comments);
}
String[] expectedLines = expected.toString(StandardCharsets.UTF_8.displayName()).split("\\n");
String[] actualLines = actual.toString(StandardCharsets.UTF_8.displayName()).split("\\n");
assertEquals(expectedLines.length, actualLines.length);
// The assertion below checks that the comment is the same in both files
assertEquals(expectedLines[0], actualLines[0]);
// N.B.: We must not expect expectedLines[1] and actualLines[1] to have the same value as
// it contains the timestamp of when the data was written to the stream, which makes
// this test brittle, causing intermitent failures, see COLLECTIONS-812
}
}