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https://issues.apache.org/jira/browse/CB-4504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13745663#comment-13745663
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Peter commented on CB-4504:
---------------------------
The purpose of the test is to verify that the FileWriter's *onerror* callback
gets called if the user attempts an illegal write.
Because _"You can't write to the android_assets"_ is an example of an illegal
write we expected onerror callback to be called.
> Attempt to write file to file:///android_asset folder crashes
> -------------------------------------------------------------
>
> Key: CB-4504
> URL: https://issues.apache.org/jira/browse/CB-4504
> Project: Apache Cordova
> Issue Type: Bug
> Components: Android
> Affects Versions: 2.9.0
> Environment: Android v4.3 emulator
> Reporter: Peter
> Assignee: Joe Bowser
> Priority: Minor
>
> I wrote a Jasmine test case which attempts to write to the *android_assets*
> folder.
> The test expects the FileWriter.onerror callback will be called with some
> appropriate error code. Instead, Cordova fails internally.
> It appears that FileHelper.getRealPath returns null, which the
> FileUtils.write is not coping with, and when the null is passed to
> FileOutputStream that throws NPE, which nobody is handling...
> Test code fragment:
> {code}
> it("onerror is called if write to file:///android_asset", function() {
> var theWriter,
> filePath = "file:///android_asset/jumpyfox.txt",
> // file content
> fox = "The quick brown fox";
> // callbacks
> var onerrorCB = jasmine.createSpy().andCallFake(function(a) {
>
> expect(theWriter.error.code).toBe(FileError.NO_MODIFICATION_ALLOWED_ERR);
>
> expect(a.target.error.code).toBe(FileError.NO_MODIFICATION_ALLOWED_ERR);
> });
> // writes initial file content
> var write_file = function(file) {
> theWriter = new FileWriter(file);
> theWriter.onerror = onerrorCB;
> theWriter.write(fox);
> };
> // create file, then write to it
> runs(function() {
> var file = new File();
> file.fullPath = filePath;
> write_file(file);
> });
> waitsFor(function() { return onerrorCB.wasCalled; }, "onerrorCB never
> called", Tests.TEST_TIMEOUT);
> });
> {code}
> Maybe other scenarios which call FileHelper.getRealPath could have similar
> consequences if it returns null.
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