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jsongMerge.spec.js
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jsongMerge.spec.js
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var jsongMerge = require('./../../../src/cache/jsongMerge');
var Model = require('falcor').Model;
var $ref = Model.ref;
var $atom = Model.atom;
var expect = require('chai').expect;
var _ = require('lodash');
/**
* normally i don't test internals but i think the merges
* warrent internal testing. The reason being is that the
* merges are core to the product. If i don't, i will have to
* figure out where bugs are without much clarity into where they
* are.
*/
describe('JSONG - Merge', function() {
it('should write a simple path to the cache.', function() {
var jsong = {
jsonGraph: {
there: {
is: $atom('a value')
}
},
paths: [['there', 'is']]
};
var out = mergeTest(jsong);
expect(out).to.deep.equals({
values: [{
path: ['there', 'is'],
value: $atom('a value')
}],
references: []
});
});
it('should write a falsey number to the cache.', function() {
var jsong = {
jsonGraph: {
there: {
is: 0
}
},
paths: [['there', 'is']]
};
var out = mergeTest(jsong);
expect(out).to.deep.equals({
values: [{
path: ['there', 'is'],
value: 0
}],
references: []
});
});
it('should write a falsey string to the cache.', function() {
var jsong = {
jsonGraph: {
there: {
is: ''
}
},
paths: [['there', 'is']]
};
var out = mergeTest(jsong);
expect(out).to.deep.equals({
values: [{
path: ['there', 'is'],
value: ''
}],
references: []
});
});
it('should write a false boolean to the cache.', function() {
var jsong = {
jsonGraph: {
there: {
is: false
}
},
paths: [['there', 'is']]
};
var out = mergeTest(jsong);
expect(out).to.deep.equals({
values: [{
path: ['there', 'is'],
value: false
}],
references: []
});
});
it('should write a null to the cache.', function() {
var jsong = {
jsonGraph: {
there: {
is: null
}
},
paths: [['there', 'is']]
};
var out = mergeTest(jsong);
expect(out).to.deep.equals({
values: [{
path: ['there', 'is'],
value: null
}],
references: []
});
});
it('should write a path with a reference to a value.', function() {
var jsong = {
jsonGraph: {
there: {
is: $ref('a.value')
},
a: {
value: $atom('was here')
}
},
paths: [['there', 'is']]
};
mergeTest(jsong);
});
it('should write a path with a reference to a branch.', function() {
var jsong = {
jsonGraph: {
there: {
is: $ref('a')
},
a: {
value: $atom('was here')
}
},
paths: [['there', 'is', 'value']]
};
mergeTest(jsong);
});
it('should write a path with a reference to a reference.', function() {
var jsong = {
jsonGraph: {
there: {
is: $ref('a')
},
a: $ref('value'),
value: $atom('was here')
},
paths: [['there', 'is']]
};
mergeTest(jsong);
});
it('should get the set refs.', function() {
var jsong = {
jsonGraph: {
there: {
is: $ref('a')
}
},
paths: [['there', 'is']]
};
var cache = {};
var out = jsongMerge(cache, jsong);
expect(out).to.deep.equals({
values: [],
references: [{
path: ['there', 'is'],
value: ['a']
}]
});
});
it('should get the set values and refs.', function() {
var jsong = {
jsonGraph: {
there: {
is: $ref('a'),
was: $ref('b')
},
a: {
value: 5
}
},
paths: [
['there', 'is', 'value'],
['there', 'was']
]
};
var cache = {};
var out = jsongMerge(cache, jsong);
expect(out).to.deep.equals({
values: [{
path: ['there', 'is', 'value'],
value: 5
}],
references: [{
path: ['there', 'was'],
value: ['b']
}]
});
});
it('should fire the router error hook if $type:"error" is found while walking', function () {
var jsong = {
jsonGraph: {
this: {
is: {
deep: {
yo: { $type: 'error', value: { message: 'lol error' } }
}
}
}
},
paths: [['this', 'is', 'deep', 'yo']]
};
var callArgs = null;
var callCount = 0;
var mockRouter = {
_pathErrorHook: function () {
callCount++;
callArgs = Array.prototype.slice.call(arguments);
}
}
var cache = {};
var out = jsongMerge(cache, jsong, mockRouter);
expect(out).to.deep.equal({
values: [{
path: ['this', 'is', 'deep', 'yo'],
value: { $type: 'error', value: { message: 'lol error' } }
}],
references: []
});
expect(callArgs).to.deep.equals([
{
path: ['this', 'is', 'deep', 'yo'],
value : {
$type: 'error', value: { message: 'lol error'}
}
}
]);
expect(callCount).to.equals(1);
});
});
function mergeTest(jsong) {
var cache = {
there: {
was: $atom('a value')
}
};
var expected = _.merge(cache, jsong.jsonGraph);
var out = jsongMerge(cache, jsong);
expect(cache).to.deep.equals(expected);
return out;
}