# Built-in function type inference and dependency tracking

[[test]]
name = "sum function"
expression = "sum([a, b, c])"
input = '{"a": 1, "b": 2, "c": 3}'
reads = [
    { type = "direct", path = ["a"] },
    { type = "direct", path = ["b"] },
    { type = "direct", path = ["c"] },
]

[test.loose]
return_type = '"Number"'

[test.strict]
return_type = '"Number"'

[[test]]
name = "len function"
expression = "len(items)"
input = '{"items": [1, 2, 3]}'
reads = [
    { type = "direct", path = ["items"] },
]

[test.loose]
return_type = '"Number"'

[test.strict]
return_type = '"Number"'

[[test]]
name = "max function"
expression = "max([a, b])"
input = '{"a": 10, "b": 20}'
reads = [
    { type = "direct", path = ["a"] },
    { type = "direct", path = ["b"] },
]

[test.loose]
return_type = '"Number"'

[test.strict]
return_type = '"Number"'

[[test]]
name = "min function"
expression = "min([a, b])"
input = '{"a": 10, "b": 20}'
reads = [
    { type = "direct", path = ["a"] },
    { type = "direct", path = ["b"] },
]

[test.loose]
return_type = '"Number"'

[test.strict]
return_type = '"Number"'

[[test]]
name = "floor function"
expression = "floor(x)"
input = '{"x": 5.7}'
reads = [
    { type = "direct", path = ["x"] },
]

[test.loose]
return_type = '"Number"'

[test.strict]
return_type = '"Number"'

[[test]]
name = "ceil function"
expression = "ceil(x)"
input = '{"x": 5.2}'
reads = [
    { type = "direct", path = ["x"] },
]

[test.loose]
return_type = '"Number"'

[test.strict]
return_type = '"Number"'

[[test]]
name = "abs function"
expression = "abs(x)"
input = '{"x": -5}'
reads = [
    { type = "direct", path = ["x"] },
]

[test.loose]
return_type = '"Number"'

[test.strict]
return_type = '"Number"'

[[test]]
name = "upper function"
expression = "upper(name)"
input = '{"name": "hello"}'
reads = [
    { type = "direct", path = ["name"] },
]

[test.loose]
return_type = '"String"'

[test.strict]
return_type = '"String"'

[[test]]
name = "lower function"
expression = "lower(name)"
input = '{"name": "HELLO"}'
reads = [
    { type = "direct", path = ["name"] },
]

[test.loose]
return_type = '"String"'

[test.strict]
return_type = '"String"'

[[test]]
name = "contains function"
expression = "contains(text, 'world')"
input = '{"text": "hello world"}'
reads = [
    { type = "direct", path = ["text"] },
]

[test.loose]
return_type = '"Bool"'

[test.strict]
return_type = '"Bool"'

[[test]]
name = "startsWith function"
expression = "startsWith(text, 'hello')"
input = '{"text": "hello world"}'
reads = [
    { type = "direct", path = ["text"] },
]

[test.loose]
return_type = '"Bool"'

[test.strict]
return_type = '"Bool"'

[[test]]
name = "endsWith function"
expression = "endsWith(text, 'world')"
input = '{"text": "hello world"}'
reads = [
    { type = "direct", path = ["text"] },
]

[test.loose]
return_type = '"Bool"'

[test.strict]
return_type = '"Bool"'

[[test]]
name = "merge of an any-typed array"
expression = "merge([a, b])"
input = '{"Object":{"a":"Any","b":"Any"}}'

[test.loose]
return_type = '"Any"'

[test.strict]
return_type = '"Any"'

[[test]]
name = "merge of empty array literal"
expression = "merge([])"

[test.loose]
return_type = '"Any"'

[test.strict]
return_type = '"Any"'

[[test]]
name = "merge of scalar array errors"
expression = "merge([1, 2])"

[test.loose]
diagnostics = [
    { source = "type_check", severity = "error" },
]

[test.strict]
diagnostics = [
    { source = "type_check", severity = "error" },
]

[[test]]
name = "merge nullable object with object"
expression = "merge([a, {y: 1}])"
input = '{"Object": {"a": {"Nullable": {"Object": {"x": "Number"}}}}}'

[test.loose]
return_type = '{"Object": {"x": "Number", "y": "Number"}}'

[test.strict]
return_type = '{"Object": {"x": "Number", "y": "Number"}}'

[[test]]
name = "merge null literal with object"
expression = "merge([null, {y: 1}])"

[test.loose]
return_type = '{"Object": {"y": "Number"}}'

[test.strict]
return_type = '{"Object": {"y": "Number"}}'

[[test]]
name = "mergeDeep nullable object with object"
expression = "mergeDeep([a, {y: 1}])"
input = '{"Object": {"a": {"Nullable": {"Object": {"x": "Number"}}}}}'

[test.loose]
return_type = '{"Object": {"x": "Number", "y": "Number"}}'

[test.strict]
return_type = '{"Object": {"x": "Number", "y": "Number"}}'

[[test]]
name = "merge of non-array argument errors"
expression = "merge(a)"
input = '{"Object": {"a": {"Object": {"x": "Number"}}}}'

[test.loose]
diagnostics = [{ source = "type_check", severity = "error" }]

[test.strict]
diagnostics = [{ source = "type_check", severity = "error" }]

[[test]]
name = "mergeDeep of scalar array errors"
expression = "mergeDeep([1, 2])"

[test.loose]
diagnostics = [{ source = "type_check", severity = "error" }]

[test.strict]
diagnostics = [{ source = "type_check", severity = "error" }]

[[test]]
name = "date comparison methods return bool"
expression = "d(a).isSameOrAfter(d(b))"
input = '{"a": "2023-10-15", "b": "2023-10-14"}'
reads = [
    { type = "direct", path = ["a"] },
    { type = "direct", path = ["b"] },
]

[test.loose]
return_type = '"Bool"'

[test.strict]
return_type = '"Bool"'

[[test]]
name = "date comparison with unit returns bool"
expression = "d(a).isBefore(d(b), 'day')"
input = '{"a": "2023-10-15", "b": "2023-10-14"}'
reads = [
    { type = "direct", path = ["a"] },
    { type = "direct", path = ["b"] },
]

[test.loose]
return_type = '"Bool"'

[test.strict]
return_type = '"Bool"'

[[test]]
name = "failed overload keeps its return type"
expression = "len(tags)"
input = '{"Object": {"tags": {"Nullable": {"Array": "String"}}}}'

[test.loose]
return_type = '"Number"'
diagnostics = [
    { source = "type_check", severity = "error" },
    { source = "type_check", severity = "error" },
]

[test.strict]
return_type = '"Number"'
diagnostics = [
    { source = "type_check", severity = "error" },
    { source = "type_check", severity = "error" },
]