intellij-sdk-code-samples/formatter_test.md

title
Formatter Test

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In this test we will check if the formatter, implemented in the Formatter section of the Custom Language Support Tutorial works as we expect.

1. Define test data

Create a file FormatterTestData.simple.

# You are reading the ".properties" entry.
! The exclamation mark can also mark text as comments.
website=http://en.wikipedia.org/

language= English
# The backslash below tells the application to continue reading
# the value onto the next line.
message  =  Welcome to \
          Wikipedia!
# Add spaces to the key
key\ with\ spaces = This is the value that could be looked up with the key "key with spaces".
# Unicode
tab :\u0009

2. Define a test method

public void testFormatter() {
    myFixture.configureByFiles("FormatterTestData.simple");
    CodeStyleSettingsManager.getSettings(getProject()).SPACE_AROUND_ASSIGNMENT_OPERATORS = true;
    ApplicationManager.getApplication().runWriteAction(new Runnable() {
        @Override
        public void run() {
            CodeStyleManager.getInstance(getProject()).reformat(myFixture.getFile());
        }
    });
    myFixture.checkResultByFile("DefaultTestData.simple");
}

3. Run the test

Run the test and make sure it's green.

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