platform/templatesui/test/unit/src/org/netbeans/modules/templatesui/validation.js

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function assertDisplay(id, value, msg) {
    var e = document.getElementById(id);
    assertEquals(value, e.style.display, msg)
}

assertEquals(3, tck.steps(false).length, "There are three step directives");
assertEquals('init', tck.steps(false)[0], "First step id");
assertEquals('info', tck.steps(false)[1], "Second step id");
assertEquals('summary', tck.steps(false)[2], "3rd step id");

assertEquals(3, tck.steps(true).length, "There are three localized data-step headers");
assertEquals('Initial Page', tck.steps(true)[0], "First step has own display name");
assertEquals('info', tck.steps(true)[1], "Second display name is taken from id string");
assertEquals('summary', tck.steps(true)[2], "3rd display name fallbacks to id attribute");

assertEquals('init', tck.current(), "Current step is 1st one");
assertDisplay('s0', '', "Display characteristics of 1st panel not mangled");
assertDisplay('s1', 'none', "Invisible s1");
assertDisplay('s2', 'none', "Invisible s2");

tck.next();
assertEquals('info', tck.current(), "Moved to 2nd panel");
assertDisplay('s0', 'none', "Invisible s0");
assertDisplay('s1', '', "Display characteristics of 2nd panel not mangled");
assertDisplay('s2', 'none', "Invisible s2");

assertEquals(-1, tck.data().errorCode(), "error state -1 means we require validation");
tck.next();
assertEquals('checking!', tck.data().msg(), "validation method has been called");
assertEquals('info', tck.current(), "Still remains on 2nd panel");

// process tasks registered by invokeLater by the tested page
tck.invokeNow();

assertEquals('summary', tck.current(), "Moved to 3nd panel");
assertEquals(true, tck.data().ok(), "ok assigned to true");
assertEquals('Validated!', tck.data().msg(), "message changed");
assertEquals(0, tck.data().errorCode(), "no error");