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describe('patternAdapter', function() {
it('compiles the correct pattern when patterns are listened to', function(){
bus('newListener').emit( 'node:test_pattern');
expect( jsonPathCompiler ).toHaveBeenCalledWith('test_pattern');
})
it('listens for NODE_FOUND events when node:pattern is added', function(){
bus('newListener').emit( 'node:test_pattern');
expect(bus(NODE_FOUND).on)
.toHaveBeenCalledWith(
jasmine.any(Function)
, 'node:test_pattern'
)
})
it('does not listen for NODE_FOUND events second time same node:pattern is added', function(){
bus('newListener').emit( 'node:test_pattern');
bus('newListener').emit( 'node:test_pattern');
expect(bus(NODE_FOUND).on.calls.length).toBe(1);
})
it('stops listening for node events when node:pattern is removed again', function(){
bus('node:test_pattern').on( noop);
bus('node:test_pattern').un( noop);
expect(bus(NODE_FOUND).un)
.toHaveBeenCalledWith(
'node:test_pattern'
)
})
it('starts listening again for node events when node:pattern is added, removed and added again', function(){
bus('node:test_pattern').on( noop);
expect(bus(NODE_FOUND).on.calls.length).toBe(1);
bus('node:test_pattern').on( noop);
expect(bus(NODE_FOUND).on.calls.length).toBe(1);
bus('node:test_pattern').un( noop);
expect(bus(NODE_FOUND).un.calls.length).toBe(0);
bus('node:test_pattern').un( noop);
expect(bus(NODE_FOUND).un.calls.length).toBe(1);
bus('node:test_pattern').on( noop);
expect(bus(NODE_FOUND).on.calls.length).toBe(2);
})
it('doesn\'t stop listening is there are still other node:pattern listeners', function(){
bus('node:test_pattern').on( noop);
bus('node:test_pattern').on( noop);
bus('node:test_pattern').un( noop);
expect(bus(NODE_FOUND).un)
.not.toHaveBeenCalledWith(
'node:test_pattern'
)
})
it('doesn\'t stop listening if a different pattern is unsubscribed from', function(){
bus('node:test_pattern').on( noop);
bus('node:other_test_pattern').on( noop);
bus('node:other_test_pattern').un( noop);
expect(bus(NODE_FOUND).un)
.not.toHaveBeenCalledWith(
'node:test_pattern'
)
})
it('doesn\'t stop listening if wrong event type is unsubscribed', function(){
bus('node:test_pattern').on( noop);
bus('path:test_pattern').on( noop);
bus('path:test_pattern').un( noop);
expect(bus(NODE_FOUND).un)
.not.toHaveBeenCalledWith(
'node:test_pattern'
)
})
it('only listens once to NODE_FOUND when same pattern is added twice', function(){
bus('node:test_pattern').on( noop);
bus('node:test_pattern').on( noop);
expect( listAsArray( bus(NODE_FOUND).listeners ).length ).toBe(1);
})
it('listens to NODE_FOUND and PATH_FOUND when given node: and path: listeners', function(){
bus('node:test_pattern').on( noop);
bus('path:test_pattern').on( noop);
expect(bus(NODE_FOUND).on)
.toHaveBeenCalledWith(
jasmine.any(Function)
, 'node:test_pattern'
)
expect(bus(PATH_FOUND).on)
.toHaveBeenCalledWith(
jasmine.any(Function)
, 'path:test_pattern'
)
})
it('fires node:pattern events when match is found', function(){
var ascent = anAscentMatching('test_pattern');
bus('node:test_pattern').on( noop);
bus(NODE_FOUND).emit( ascent);
expect( bus('node:test_pattern').emit ).toHaveBeenCalled();
})
it('fires gives node:pattern the node, path ' +
'and ancestors from the given ascent', function(){
var testJson = {animals:{mammals:{humans:'hi there!'}}},
ascent = anAscentMatching('test_pattern', testJson);
bus('node:test_pattern').on(noop);
bus(NODE_FOUND).emit( ascent);
expect( bus('node:test_pattern').emit )
.toHaveBeenCalledWith(
'hi there!',
[ 'animals', 'mammals', 'humans'],
[ testJson,
testJson.animals,
testJson.animals.mammals,
testJson.animals.mammals.humans
]
);
})
// ----------- end of tests -----------
var bus, matches, jsonPathCompiler;
beforeEach(function(){
matches = {};
bus = spiedPubSub();
jsonPathCompiler = jasmine.createSpy('jsonPathCompiler').andCallFake(
function (pattern){
function compiled ( ascent ){
if( matches[pattern] === ascent ) {
return head(ascent);
} else {
return false;
}
}
return compiled;
}
);
patternAdapter(bus, jsonPathCompiler);
})
function anAscentMatching(pattern, json) {
var ascent
if( json ) {
ascent = ascentFrom(json);
} else {
ascent = list(namedNode('node', {}));
}
matches[pattern] = ascent;
return ascent;
}
}); |