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Improve Seq and remove newline from non-min empty in Immutable plugin (…
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…jestjs#4241)

* Improve Seq and remove newline from non-min empty in Immutable plugin

* Edit comment

* Add tests for arguments and iterator

* Add assertions size toBeUndefined for lazy Seq
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@pedrottimark @cpojer
pedrottimark authored and cpojer committed Aug 14, 2017
1 parent 8b1ee5e commit 17f47f7
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166 changes: 139 additions & 27 deletions packages/pretty-format/src/__tests__/immutable.test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -34,7 +34,7 @@ describe('Immutable.OrderedSet', () => {
it('supports an empty collection {min: false}', () => {
expect(
Immutable.OrderedSet([]),
).toPrettyPrintTo('Immutable.OrderedSet [\n]', {min: false});
).toPrettyPrintTo('Immutable.OrderedSet []', {min: false});
});

it('supports a single string element', () => {
Expand Down Expand Up @@ -125,7 +125,7 @@ describe('Immutable.List', () => {
});

it('supports an empty collection {min: false}', () => {
expect(Immutable.List([])).toPrettyPrintTo('Immutable.List [\n]', {
expect(Immutable.List([])).toPrettyPrintTo('Immutable.List []', {
min: false,
});
});
Expand Down Expand Up @@ -206,7 +206,7 @@ describe('Immutable.Stack', () => {
});

it('supports an empty collection {min: false}', () => {
expect(Immutable.Stack([])).toPrettyPrintTo('Immutable.Stack [\n]', {
expect(Immutable.Stack([])).toPrettyPrintTo('Immutable.Stack []', {
min: false,
});
});
Expand Down Expand Up @@ -287,7 +287,7 @@ describe('Immutable.Set', () => {
});

it('supports an empty collection {min: false}', () => {
expect(Immutable.Set([])).toPrettyPrintTo('Immutable.Set [\n]', {
expect(Immutable.Set([])).toPrettyPrintTo('Immutable.Set []', {
min: false,
});
});
Expand Down Expand Up @@ -365,7 +365,7 @@ describe('Immutable.Map', () => {
});

it('supports an empty collection {min: false}', () => {
expect(Immutable.Map({})).toPrettyPrintTo('Immutable.Map {\n}', {
expect(Immutable.Map({})).toPrettyPrintTo('Immutable.Map {}', {
min: false,
});
});
Expand Down Expand Up @@ -430,7 +430,7 @@ describe('Immutable.OrderedMap', () => {
it('supports an empty collection {min: false}', () => {
expect(
Immutable.OrderedMap({}),
).toPrettyPrintTo('Immutable.OrderedMap {\n}', {min: false});
).toPrettyPrintTo('Immutable.OrderedMap {}', {min: false});
});

it('supports an object with single key', () => {
Expand Down Expand Up @@ -545,7 +545,7 @@ describe('Immutable.Record', () => {
it('supports an empty record {min: false}', () => {
const ABRecord = Immutable.Record({}, 'ABRecord');

expect(ABRecord()).toPrettyPrintTo('Immutable.ABRecord {\n}', {
expect(ABRecord()).toPrettyPrintTo('Immutable.ABRecord {}', {
min: false,
});
});
Expand Down Expand Up @@ -643,16 +643,15 @@ describe('indentation of heterogeneous collections', () => {
[
'Object {',
' "filter": "all",',
' "todos": Immutable.List [',
' ],',
' "todos": Immutable.List [],',
'}',
].join('\n'),
);
});
test('empty Immutable.Map as child of Array', () => {
const val = [Immutable.Map({})];
expect(val).toPrettyPrintTo(
['Array [', ' Immutable.Map {', ' },', ']'].join('\n'),
['Array [', ' Immutable.Map {},', ']'].join('\n'),
);
});

Expand Down Expand Up @@ -785,6 +784,27 @@ describe('maxDepth option', () => {
expect(val).toPrettyPrintTo(expected, {maxDepth: 1});
});

test('Immutable.Seq as child of Immutable.Map', () => {
const val = {
// ++depth === 1
filter: 'all',
todos: Immutable.Seq(
Immutable.List([
Immutable.Map({
completed: true,
text: 'Return if depth exceeds max',
}),
]),
),
};
const expected = [
'Object {',
' "filter": "all",',
' "todos": [Immutable.Seq],',
'}',
].join('\n');
expect(val).toPrettyPrintTo(expected, {maxDepth: 1});
});
test('Immutable.Map as descendants in immutable collection', () => {
const val = Immutable.Map({
// ++depth === 1
Expand Down Expand Up @@ -817,47 +837,139 @@ describe('maxDepth option', () => {
});

describe('Immutable.Seq', () => {
const expected = '[Immutable.Seq]';
it('supports an empty sequence from array {min: true}', () => {
expect(Immutable.Seq([])).toPrettyPrintTo(expected, {min: true});
expect(Immutable.Seq([])).toPrettyPrintTo('Immutable.Seq []', {min: true});
});
it('supports an empty sequence from array {min: false}', () => {
expect(Immutable.Seq([])).toPrettyPrintTo(expected, {min: false});
expect(Immutable.Seq([])).toPrettyPrintTo('Immutable.Seq []', {min: false});
});
it('supports a non-empty sequence from array {min: true}', () => {
expect(Immutable.Seq([0, 1, 2])).toPrettyPrintTo(expected, {min: true});
expect(
Immutable.Seq([0, 1, 2]),
).toPrettyPrintTo('Immutable.Seq [0, 1, 2]', {min: true});
});
it('supports a non-empty sequence from array {min: false}', () => {
expect(Immutable.Seq([0, 1, 2])).toPrettyPrintTo(expected, {min: false});
expect(
Immutable.Seq([0, 1, 2]),
).toPrettyPrintTo('Immutable.Seq [\n 0,\n 1,\n 2,\n]', {min: false});
});

it('supports a non-empty sequence from arguments', () => {
function returnArguments(...args) {
return arguments;
}
expect(Immutable.Seq(returnArguments(0, 1, 2))).toPrettyPrintTo(
'Immutable.Seq [\n 0,\n 1,\n 2,\n]',
);
});

it('supports an empty sequence from object {min: true}', () => {
expect(Immutable.Seq({})).toPrettyPrintTo(expected, {min: true});
expect(Immutable.Seq({})).toPrettyPrintTo('Immutable.Seq {}', {min: true});
});
it('supports an empty sequence from object {min: false}', () => {
expect(Immutable.Seq({})).toPrettyPrintTo(expected, {min: false});
expect(Immutable.Seq({})).toPrettyPrintTo('Immutable.Seq {}', {min: false});
});
it('supports a non-empty sequence from object {min: true}', () => {
expect(Immutable.Seq({key: 'value'})).toPrettyPrintTo(expected, {
expect(
Immutable.Seq({key: 'value'}),
).toPrettyPrintTo('Immutable.Seq {"key": "value"}', {
min: true,
});
});
it('supports a non-empty sequence from object {min: false}', () => {
expect(Immutable.Seq({key: 'value'})).toPrettyPrintTo(expected, {
expect(
Immutable.Seq({key: 'value'}),
).toPrettyPrintTo('Immutable.Seq {\n "key": "value",\n}', {
min: false,
});
});
it('supports a sequence from Immutable.Map', () => {

it('supports a sequence of entries from Immutable.Map', () => {
expect(Immutable.Seq(Immutable.Map({key: 'value'}))).toPrettyPrintTo(
expected,
'Immutable.Seq {\n "key": "value",\n}',
);
});
it('supports a sequence from Immutable.List', () => {
expect(Immutable.Seq(Immutable.List([0, 1, 2]))).toPrettyPrintTo(expected);

it('supports a sequence of values from ECMAScript Set', () => {
expect(Immutable.Seq(new Set([0, 1, 2]))).toPrettyPrintTo(
'Immutable.Seq [\n 0,\n 1,\n 2,\n]',
);
});
it('supports a sequence from Immutable.Set', () => {
expect(Immutable.Seq(Immutable.Set([0, 1, 2]))).toPrettyPrintTo(expected);
it('supports a sequence of values from Immutable.List', () => {
expect(Immutable.Seq(Immutable.List([0, 1, 2]))).toPrettyPrintTo(
'Immutable.Seq [\n 0,\n 1,\n 2,\n]',
);
});
it('supports a sequence of values from Immutable.Set', () => {
expect(Immutable.Seq(Immutable.Set([0, 1, 2]))).toPrettyPrintTo(
'Immutable.Seq [\n 0,\n 1,\n 2,\n]',
);
});
it('supports a sequence from Immutable.Stack', () => {
expect(Immutable.Seq(Immutable.Stack([0, 1, 2]))).toPrettyPrintTo(expected);
it('supports a sequence of values from Immutable.Stack', () => {
expect(Immutable.Seq(Immutable.Stack([0, 1, 2]))).toPrettyPrintTo(
'Immutable.Seq [\n 0,\n 1,\n 2,\n]',
);
});
});

describe('Immutable.Seq lazy entries', () => {
const expected = 'Immutable.Seq {…}';
const object = {key0: '', key1: '1'};
const filterer = value => value.length !== 0;

// undefined size confirms correct criteria for lazy Seq
test('from object properties', () => {
const val = Immutable.Seq(object).filter(filterer);
expect(val.size).toBeUndefined();
expect(val).toPrettyPrintTo(expected);
});
test('from Immutable.Map entries', () => {
const val = Immutable.Seq(Immutable.Map(object)).filter(filterer);
expect(val.size).toBeUndefined();
expect(val).toPrettyPrintTo(expected);
});
});

describe('Immutable.Seq lazy values', () => {
const expected = 'Immutable.Seq […]';
const array = ['', '1', '22'];
const filterer = item => item.length !== 0;

test('from Immutable.Range', () => {
const val = Immutable.Range(1, Infinity);
expect(val.size).toBe(Infinity);
expect(val).toPrettyPrintTo(expected);
});

// undefined size confirms correct criteria for lazy Seq
test('from iterator', () => {
function returnIterator(values) {
let i = 0;
return {
next() {
return i < values.length
? {done: false, value: values[i++]}
: {done: true};
},
};
}
const val = Immutable.Seq(returnIterator(array));
expect(val.size).toBeUndefined();
expect(val).toPrettyPrintTo(expected);
});
test('from array items', () => {
const val = Immutable.Seq(array).filter(filterer);
expect(val.size).toBeUndefined();
expect(val).toPrettyPrintTo(expected);
});
test('from Immutable.List values', () => {
const val = Immutable.Seq(Immutable.List(array)).filter(filterer);
expect(val.size).toBeUndefined();
expect(val).toPrettyPrintTo(expected);
});
test('from ECMAScript Set values', () => {
const val = Immutable.Seq(new Set(array)).filter(filterer);
expect(val.size).toBeUndefined();
expect(val).toPrettyPrintTo(expected);
});
});
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