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Bug 484579 - nsIMIMEService.getTypeFromExtension may fail unexpectedly on Windows when "Content Type" is empty in the registry; fix for test; r=sdwilsh sr=bzbarsky

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This commit is contained in:
Paolo Amadini 2009-04-30 12:07:15 +02:00
parent 2241beca1b
commit 2db223e084
1 changed files with 22 additions and 27 deletions
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49
uriloader/exthandler/tests/unit/test_getTypeFromExtension_with_empty_Content_Type.js
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@ -41,10 +41,17 @@
* "Content Type" is empty in the registry.
*/
function run_test() {
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
// --- Preliminary platform check ---
// If this test is not running on the Windows platform, stop now, before
// calling XPCOMUtils.generateQI during the MockWindowsRegKey declaration.
if (!("@mozilla.org/windows-registry-key;1" in Components.classes))
return;
// --- Modified nsIWindowsRegKey implementation ---
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
/**
* Constructs a new mock registry key by wrapping the provided object.
*
@ -192,33 +199,21 @@ function run_test() {
);
}
// --- Test support functions ---
/**
* Returns true if the application is executing on Windows.
*/
function isOnWindows() {
return ("@mozilla.org/windows-registry-key;1" in Components.classes);
}
// --- Test procedure ---
// This test is Windows-specific
if(isOnWindows()) {
// Activate the override of the ".txt" file association data in the registry
registerMockWindowsRegKeyFactory();
try {
// Try and get the MIME type associated with the extension. If this
// operation does not throw an unexpected exception, the test succeeds.
var type = Cc["@mozilla.org/mime;1"].
getService(Ci.nsIMIMEService).
getTypeFromExtension(".txt");
} catch (e if (e instanceof Ci.nsIException &&
e.result == Cr.NS_ERROR_NOT_AVAILABLE)) {
// This is an expected exception, thrown if the type can't be determined
} finally {
// Ensure we restore the original factory when the test is finished
unregisterMockWindowsRegKeyFactory();
}
// Activate the override of the ".txt" file association data in the registry
registerMockWindowsRegKeyFactory();
try {
// Try and get the MIME type associated with the extension. If this
// operation does not throw an unexpected exception, the test succeeds.
var type = Cc["@mozilla.org/mime;1"].
getService(Ci.nsIMIMEService).
getTypeFromExtension(".txt");
} catch (e if (e instanceof Ci.nsIException &&
e.result == Cr.NS_ERROR_NOT_AVAILABLE)) {
// This is an expected exception, thrown if the type can't be determined
} finally {
// Ensure we restore the original factory when the test is finished
unregisterMockWindowsRegKeyFactory();
}
}