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Is there a Javascript equivalent to pytest's parameterized fixtures?
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In pytest you can set up fixtures that can have multiple different values. These are called "parameterized fixtures". A test that uses these fixtures will be run with all possible combinations of values from those fixtures.
Example
# Fixture `a` can have the values `1` and `2`
@pytest.fixture(params=[1, 2])
def a(request):
yield request.param
# Fixture `b` can have the values `3` and `4`
@pytest.fixture(params=[3, 4])
def b(request):
yield request.param
# The test `test_sum` uses the fixtures `a` and `b`
def test_sum(a, b):
assert sum([a, b]) == a + b
Here, the function test_sum will be run four times in total. Each run will use different arguments: a=1, b=3, a=1, b=4, a=2, b=3, and a=2, b=4 respectively.
Question
Is there an equivalent to parametrized fixtures in any Javascript testing library? (We currently use mocha, so that would be the most interesting to us)
javascript unit-testing mocha pytest
asked Dec 7 '17 at 10:04
qff
2,68421645
add a comment |
up vote
3
down vote
favorite
In pytest you can set up fixtures that can have multiple different values. These are called "parameterized fixtures". A test that uses these fixtures will be run with all possible combinations of values from those fixtures.
Example
# Fixture `a` can have the values `1` and `2`
@pytest.fixture(params=[1, 2])
def a(request):
yield request.param
# Fixture `b` can have the values `3` and `4`
@pytest.fixture(params=[3, 4])
def b(request):
yield request.param
# The test `test_sum` uses the fixtures `a` and `b`
def test_sum(a, b):
assert sum([a, b]) == a + b
Here, the function test_sum will be run four times in total. Each run will use different arguments: a=1, b=3, a=1, b=4, a=2, b=3, and a=2, b=4 respectively.
Question
Is there an equivalent to parametrized fixtures in any Javascript testing library? (We currently use mocha, so that would be the most interesting to us)
javascript unit-testing mocha pytest
asked Dec 7 '17 at 10:04
qff
2,68421645
1
I'm looking for the same stuff. Surprisely, pytest's fixture alike feature has been requested for years. However, these JS testing frontiers never really understand how elegant the tests can be when with builtin fixture.
– Tim Wu
Mar 23 at 23:34
add a comment |
up vote
3
down vote
favorite
up vote
3
down vote
favorite
In pytest you can set up fixtures that can have multiple different values. These are called "parameterized fixtures". A test that uses these fixtures will be run with all possible combinations of values from those fixtures.
Example
# Fixture `a` can have the values `1` and `2`
@pytest.fixture(params=[1, 2])
def a(request):
yield request.param
# Fixture `b` can have the values `3` and `4`
@pytest.fixture(params=[3, 4])
def b(request):
yield request.param
# The test `test_sum` uses the fixtures `a` and `b`
def test_sum(a, b):
assert sum([a, b]) == a + b
Here, the function test_sum will be run four times in total. Each run will use different arguments: a=1, b=3, a=1, b=4, a=2, b=3, and a=2, b=4 respectively.
Question
Is there an equivalent to parametrized fixtures in any Javascript testing library? (We currently use mocha, so that would be the most interesting to us)
javascript unit-testing mocha pytest
asked Dec 7 '17 at 10:04
qff
2,68421645
In pytest you can set up fixtures that can have multiple different values. These are called "parameterized fixtures". A test that uses these fixtures will be run with all possible combinations of values from those fixtures.
Example
# Fixture `a` can have the values `1` and `2`
@pytest.fixture(params=[1, 2])
def a(request):
yield request.param
# Fixture `b` can have the values `3` and `4`
@pytest.fixture(params=[3, 4])
def b(request):
yield request.param
# The test `test_sum` uses the fixtures `a` and `b`
def test_sum(a, b):
assert sum([a, b]) == a + b
Here, the function test_sum will be run four times in total. Each run will use different arguments: a=1, b=3, a=1, b=4, a=2, b=3, and a=2, b=4 respectively.
Question
Is there an equivalent to parametrized fixtures in any Javascript testing library? (We currently use mocha, so that would be the most interesting to us)
javascript unit-testing mocha pytest
javascript unit-testing mocha pytest
asked Dec 7 '17 at 10:04
qff
2,68421645
asked Dec 7 '17 at 10:04
qff
2,68421645
edited Dec 7 '17 at 10:19
asked Dec 7 '17 at 10:04
qff
2,68421645
asked Dec 7 '17 at 10:04
qff
2,68421645
asked Dec 7 '17 at 10:04
qff
2,68421645
2,68421645
1
I'm looking for the same stuff. Surprisely, pytest's fixture alike feature has been requested for years. However, these JS testing frontiers never really understand how elegant the tests can be when with builtin fixture.
– Tim Wu
Mar 23 at 23:34
add a comment |
1
I'm looking for the same stuff. Surprisely, pytest's fixture alike feature has been requested for years. However, these JS testing frontiers never really understand how elegant the tests can be when with builtin fixture.
– Tim Wu
Mar 23 at 23:34
1
1
I'm looking for the same stuff. Surprisely, pytest's fixture alike feature has been requested for years. However, these JS testing frontiers never really understand how elegant the tests can be when with builtin fixture.
– Tim Wu
Mar 23 at 23:34
I'm looking for the same stuff. Surprisely, pytest's fixture alike feature has been requested for years. However, these JS testing frontiers never really understand how elegant the tests can be when with builtin fixture.
– Tim Wu
Mar 23 at 23:34
add a comment |
1 Answer
1
active
oldest
votes
up vote
1
down vote
Unfortunately no. Mocha does not support it even today from what I found on the internet. There is also rejected proposal(s) for such syntax, but currently the only solution is something what they call dynamically generating tests and the syntax looks like in the code below (taken from the doc). Also you can read more about sad state of JS vs. Python testing.
describe('Possible user names behaves correctly ', () => {
const TEST_CASES = [
{args: ['rj'], expected: false},
{args: ['rj12345'], expected: false},
{args: ['rj123'], expected: true},
]
TEST_CASES.forEach((testCase) => {
it(`check user name ${JSON.stringify(testCase.args)}`, () => {
const result = checkUserName.apply(this, testCase.args)
expect(testCase.expected).toEqual(result)
})
})
})answered Nov 19 at 11:30
miso.belica
1,36311313
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
Unfortunately no. Mocha does not support it even today from what I found on the internet. There is also rejected proposal(s) for such syntax, but currently the only solution is something what they call dynamically generating tests and the syntax looks like in the code below (taken from the doc). Also you can read more about sad state of JS vs. Python testing.
describe('Possible user names behaves correctly ', () => {
const TEST_CASES = [
{args: ['rj'], expected: false},
{args: ['rj12345'], expected: false},
{args: ['rj123'], expected: true},
]
TEST_CASES.forEach((testCase) => {
it(`check user name ${JSON.stringify(testCase.args)}`, () => {
const result = checkUserName.apply(this, testCase.args)
expect(testCase.expected).toEqual(result)
})
})
})answered Nov 19 at 11:30
miso.belica
1,36311313
add a comment |
up vote
1
down vote
Unfortunately no. Mocha does not support it even today from what I found on the internet. There is also rejected proposal(s) for such syntax, but currently the only solution is something what they call dynamically generating tests and the syntax looks like in the code below (taken from the doc). Also you can read more about sad state of JS vs. Python testing.
describe('Possible user names behaves correctly ', () => {
const TEST_CASES = [
{args: ['rj'], expected: false},
{args: ['rj12345'], expected: false},
{args: ['rj123'], expected: true},
]
TEST_CASES.forEach((testCase) => {
it(`check user name ${JSON.stringify(testCase.args)}`, () => {
const result = checkUserName.apply(this, testCase.args)
expect(testCase.expected).toEqual(result)
})
})
})answered Nov 19 at 11:30
miso.belica
1,36311313
add a comment |
up vote
1
down vote
up vote
1
down vote
Unfortunately no. Mocha does not support it even today from what I found on the internet. There is also rejected proposal(s) for such syntax, but currently the only solution is something what they call dynamically generating tests and the syntax looks like in the code below (taken from the doc). Also you can read more about sad state of JS vs. Python testing.
describe('Possible user names behaves correctly ', () => {
const TEST_CASES = [
{args: ['rj'], expected: false},
{args: ['rj12345'], expected: false},
{args: ['rj123'], expected: true},
]
TEST_CASES.forEach((testCase) => {
it(`check user name ${JSON.stringify(testCase.args)}`, () => {
const result = checkUserName.apply(this, testCase.args)
expect(testCase.expected).toEqual(result)
})
})
})answered Nov 19 at 11:30
miso.belica
1,36311313
Unfortunately no. Mocha does not support it even today from what I found on the internet. There is also rejected proposal(s) for such syntax, but currently the only solution is something what they call dynamically generating tests and the syntax looks like in the code below (taken from the doc). Also you can read more about sad state of JS vs. Python testing.
describe('Possible user names behaves correctly ', () => {
const TEST_CASES = [
{args: ['rj'], expected: false},
{args: ['rj12345'], expected: false},
{args: ['rj123'], expected: true},
]
TEST_CASES.forEach((testCase) => {
it(`check user name ${JSON.stringify(testCase.args)}`, () => {
const result = checkUserName.apply(this, testCase.args)
expect(testCase.expected).toEqual(result)
})
})
})describe('Possible user names behaves correctly ', () => {
const TEST_CASES = [
{args: ['rj'], expected: false},
{args: ['rj12345'], expected: false},
{args: ['rj123'], expected: true},
]
TEST_CASES.forEach((testCase) => {
it(`check user name ${JSON.stringify(testCase.args)}`, () => {
const result = checkUserName.apply(this, testCase.args)
expect(testCase.expected).toEqual(result)
})
})
})describe('Possible user names behaves correctly ', () => {
const TEST_CASES = [
{args: ['rj'], expected: false},
{args: ['rj12345'], expected: false},
{args: ['rj123'], expected: true},
]
TEST_CASES.forEach((testCase) => {
it(`check user name ${JSON.stringify(testCase.args)}`, () => {
const result = checkUserName.apply(this, testCase.args)
expect(testCase.expected).toEqual(result)
})
})
})answered Nov 19 at 11:30
miso.belica
1,36311313
edited Nov 19 at 11:35
answered Nov 19 at 11:30
miso.belica
1,36311313
answered Nov 19 at 11:30
miso.belica
1,36311313
answered Nov 19 at 11:30
miso.belica
1,36311313
1,36311313
add a comment |
add a comment |
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1
I'm looking for the same stuff. Surprisely, pytest's fixture alike feature has been requested for years. However, these JS testing frontiers never really understand how elegant the tests can be when with builtin fixture.
– Tim Wu
Mar 23 at 23:34