[java]: fix return type and docstring for getDownloadableFiles

[navin772]

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Motivation and Context

Fixes #15288

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

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PR Type

Bug fix, Tests

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Description

• Fixed the return type of getDownloadableFiles method to List<String>.

• Updated the method's JavaDoc to reflect the corrected return type.

• Added a unit test to verify the return type and behavior of getDownloadableFiles.

• Ensured proper formatting by running the formatting script.

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Changes walkthrough 📝

	Relevant files
Bug fix	RemoteWebDriver.java Corrected JavaDoc for `getDownloadableFiles` method            java/src/org/openqa/selenium/remote/RemoteWebDriver.java Updated JavaDoc for getDownloadableFiles method to correct the description. Changed return type in JavaDoc from Map to List. +2/-2
Tests	RemoteWebDriverUnitTest.java Added unit test for `getDownloadableFiles` method                java/test/org/openqa/selenium/remote/RemoteWebDriverUnitTest.java Added a new unit test for getDownloadableFiles method. Verified the return type and expected behavior of the method. Ensured the test checks for correct command payload. +17/-0

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PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
General	Add error case test coverage Add test case to verify behavior when downloads capability is not enabled, since the method throws WebDriverException in that case according to its JavaDoc. java/test/org/openqa/selenium/remote/RemoteWebDriverUnitTest.java [811-826] @Test void getDownloadableFilesReturnsType() { List<String> expectedFiles = Arrays.asList("file1.txt", "file2.pdf"); WebDriverFixture fixture = new WebDriverFixture( new ImmutableCapabilities("se:downloadsEnabled", true), echoCapabilities, valueResponder(ImmutableMap.of("names", expectedFiles))); List<String> result = fixture.driver.getDownloadableFiles(); assertThat(result).isInstanceOf(List.class).isEqualTo(expectedFiles); fixture.verifyCommands(new CommandPayload(DriverCommand.GET_DOWNLOADABLE_FILES, emptyMap())); } +@Test +void getDownloadableFilesThrowsWhenDownloadsDisabled() { + WebDriverFixture fixture = + new WebDriverFixture( + new ImmutableCapabilities(), + echoCapabilities); + + assertThrows(WebDriverException.class, () -> fixture.driver.getDownloadableFiles()); +} + Apply this suggestion Suggestion importance[1-10]: 8 __ Why: The suggestion adds important test coverage for error handling when downloads capability is disabled, which is a documented exception case in the JavaDoc. This helps ensure robust error handling and API contract compliance.	Medium
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[VietND96]

Currently, implementation returns as List<String>. So, updating docs to be aligned is fine, no regression break.