Iran was testing the new government in Egypt and Israel's commitment to its treaty with the international community on the freedom of navigation of Suez. It seems that some agreements made by past Israeli governments have some validity afterall. Congrats. You passed their test. Those translating these articles into English should note, however, that there is a huge difference between warship and battleship. Israel and Iran have no battleships, a type of warship. Both have a small fleet of warships, though.
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from the article: Iran is celebrating Mubarak downfall with Suez crossing