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| 1 | +module TaskSeq.Tests.Map3 |
| 2 | + |
| 3 | +open Xunit |
| 4 | +open FsUnit.Xunit |
| 5 | + |
| 6 | +open FSharp.Control |
| 7 | + |
| 8 | +// |
| 9 | +// TaskSeq.map3 |
| 10 | +// TaskSeq.map3Async |
| 11 | +// |
| 12 | + |
| 13 | +module EmptySeq = |
| 14 | + [<Fact>] |
| 15 | + let ``Null source is invalid for map3`` () = |
| 16 | + assertNullArg |
| 17 | + <| fun () -> TaskSeq.map3 (fun a b c -> a + b + c) null TaskSeq.empty TaskSeq.empty |
| 18 | + |
| 19 | + assertNullArg |
| 20 | + <| fun () -> TaskSeq.map3 (fun a b c -> a + b + c) TaskSeq.empty null TaskSeq.empty |
| 21 | + |
| 22 | + assertNullArg |
| 23 | + <| fun () -> TaskSeq.map3 (fun a b c -> a + b + c) TaskSeq.empty TaskSeq.empty null |
| 24 | + |
| 25 | + assertNullArg |
| 26 | + <| fun () -> TaskSeq.map3 (fun a b c -> a + b + c) null null null |
| 27 | + |
| 28 | + [<Fact>] |
| 29 | + let ``Null source is invalid for map3Async`` () = |
| 30 | + assertNullArg |
| 31 | + <| fun () -> TaskSeq.map3Async (fun a b c -> task { return a + b + c }) null TaskSeq.empty TaskSeq.empty |
| 32 | + |
| 33 | + assertNullArg |
| 34 | + <| fun () -> TaskSeq.map3Async (fun a b c -> task { return a + b + c }) TaskSeq.empty null TaskSeq.empty |
| 35 | + |
| 36 | + assertNullArg |
| 37 | + <| fun () -> TaskSeq.map3Async (fun a b c -> task { return a + b + c }) TaskSeq.empty TaskSeq.empty null |
| 38 | + |
| 39 | + assertNullArg |
| 40 | + <| fun () -> TaskSeq.map3Async (fun a b c -> task { return a + b + c }) null null null |
| 41 | + |
| 42 | + [<Theory; ClassData(typeof<TestEmptyVariants>)>] |
| 43 | + let ``TaskSeq-map3 with all empty sequences returns empty`` variant = |
| 44 | + TaskSeq.map3 (fun a b c -> a + b + c) (Gen.getEmptyVariant variant) (Gen.getEmptyVariant variant) (Gen.getEmptyVariant variant) |
| 45 | + |> verifyEmpty |
| 46 | + |
| 47 | + [<Theory; ClassData(typeof<TestEmptyVariants>)>] |
| 48 | + let ``TaskSeq-map3Async with all empty sequences returns empty`` variant = |
| 49 | + TaskSeq.map3Async |
| 50 | + (fun a b c -> task { return a + b + c }) |
| 51 | + (Gen.getEmptyVariant variant) |
| 52 | + (Gen.getEmptyVariant variant) |
| 53 | + (Gen.getEmptyVariant variant) |
| 54 | + |> verifyEmpty |
| 55 | + |
| 56 | + [<Theory; ClassData(typeof<TestEmptyVariants>)>] |
| 57 | + let ``TaskSeq-map3 stops when first sequence is empty`` variant = |
| 58 | + TaskSeq.map3 (fun a b c -> a + b + c) (Gen.getEmptyVariant variant) (taskSeq { yield 1 }) (taskSeq { yield 2 }) |
| 59 | + |> verifyEmpty |
| 60 | + |
| 61 | + [<Theory; ClassData(typeof<TestEmptyVariants>)>] |
| 62 | + let ``TaskSeq-map3 stops when second sequence is empty`` variant = |
| 63 | + TaskSeq.map3 (fun a b c -> a + b + c) (taskSeq { yield 1 }) (Gen.getEmptyVariant variant) (taskSeq { yield 2 }) |
| 64 | + |> verifyEmpty |
| 65 | + |
| 66 | + [<Theory; ClassData(typeof<TestEmptyVariants>)>] |
| 67 | + let ``TaskSeq-map3 stops when third sequence is empty`` variant = |
| 68 | + TaskSeq.map3 (fun a b c -> a + b + c) (taskSeq { yield 1 }) (taskSeq { yield 2 }) (Gen.getEmptyVariant variant) |
| 69 | + |> verifyEmpty |
| 70 | + |
| 71 | + |
| 72 | +module Immutable = |
| 73 | + [<Theory; ClassData(typeof<TestImmTaskSeq>)>] |
| 74 | + let ``TaskSeq-map3 maps in correct order`` variant = task { |
| 75 | + let one = Gen.getSeqImmutable variant |
| 76 | + let two = Gen.getSeqImmutable variant |
| 77 | + let three = Gen.getSeqImmutable variant |
| 78 | + |
| 79 | + let! result = |
| 80 | + TaskSeq.map3 (fun a b c -> a + b + c) one two three |
| 81 | + |> TaskSeq.toArrayAsync |
| 82 | + |
| 83 | + result |> should haveLength 10 |
| 84 | + |
| 85 | + result |
| 86 | + |> should equal (Array.init 10 (fun i -> (i + 1) * 3)) |
| 87 | + } |
| 88 | + |
| 89 | + [<Theory; ClassData(typeof<TestImmTaskSeq>)>] |
| 90 | + let ``TaskSeq-map3Async maps in correct order`` variant = task { |
| 91 | + let one = Gen.getSeqImmutable variant |
| 92 | + let two = Gen.getSeqImmutable variant |
| 93 | + let three = Gen.getSeqImmutable variant |
| 94 | + |
| 95 | + let! result = |
| 96 | + TaskSeq.map3Async (fun a b c -> task { return a + b + c }) one two three |
| 97 | + |> TaskSeq.toArrayAsync |
| 98 | + |
| 99 | + result |> should haveLength 10 |
| 100 | + |
| 101 | + result |
| 102 | + |> should equal (Array.init 10 (fun i -> (i + 1) * 3)) |
| 103 | + } |
| 104 | + |
| 105 | + [<Fact>] |
| 106 | + let ``TaskSeq-map3 applies mapping to corresponding elements`` () = task { |
| 107 | + let one = taskSeq { yield! [ 1..5 ] } |
| 108 | + let two = taskSeq { yield! [ 10..10..50 ] } |
| 109 | + let three = taskSeq { yield! [ 100..100..500 ] } |
| 110 | + |
| 111 | + let! result = |
| 112 | + TaskSeq.map3 (fun a b c -> a + b + c) one two three |
| 113 | + |> TaskSeq.toArrayAsync |
| 114 | + |
| 115 | + result |> should equal [| 111; 222; 333; 444; 555 |] |
| 116 | + } |
| 117 | + |
| 118 | + [<Fact>] |
| 119 | + let ``TaskSeq-map3 works with mixed types`` () = task { |
| 120 | + let one = taskSeq { |
| 121 | + yield "hello" |
| 122 | + yield "world" |
| 123 | + } |
| 124 | + |
| 125 | + let two = taskSeq { |
| 126 | + yield 1 |
| 127 | + yield 2 |
| 128 | + } |
| 129 | + |
| 130 | + let three = taskSeq { |
| 131 | + yield true |
| 132 | + yield false |
| 133 | + } |
| 134 | + |
| 135 | + let! result = |
| 136 | + TaskSeq.map3 (fun (s: string) (n: int) (b: bool) -> sprintf "%s-%d-%b" s n b) one two three |
| 137 | + |> TaskSeq.toArrayAsync |
| 138 | + |
| 139 | + result |> should equal [| "hello-1-true"; "world-2-false" |] |
| 140 | + } |
| 141 | + |
| 142 | + [<Fact>] |
| 143 | + let ``TaskSeq-map3 truncates to shortest sequence`` () = task { |
| 144 | + let one = taskSeq { yield! [ 1..10 ] } |
| 145 | + let two = taskSeq { yield! [ 1..5 ] } |
| 146 | + let three = taskSeq { yield! [ 1..3 ] } |
| 147 | + |
| 148 | + let! result = |
| 149 | + TaskSeq.map3 (fun a b c -> a + b + c) one two three |
| 150 | + |> TaskSeq.toArrayAsync |
| 151 | + |
| 152 | + result |> should haveLength 3 |
| 153 | + result |> should equal [| 3; 6; 9 |] |
| 154 | + } |
| 155 | + |
| 156 | + [<Fact>] |
| 157 | + let ``TaskSeq-map3Async truncates to shortest sequence`` () = task { |
| 158 | + let one = taskSeq { yield! [ 1..10 ] } |
| 159 | + let two = taskSeq { yield! [ 1..5 ] } |
| 160 | + let three = taskSeq { yield! [ 1..3 ] } |
| 161 | + |
| 162 | + let! result = |
| 163 | + TaskSeq.map3Async (fun a b c -> task { return a + b + c }) one two three |
| 164 | + |> TaskSeq.toArrayAsync |
| 165 | + |
| 166 | + result |> should haveLength 3 |
| 167 | + result |> should equal [| 3; 6; 9 |] |
| 168 | + } |
| 169 | + |
| 170 | + [<Fact>] |
| 171 | + let ``TaskSeq-map3 works with singleton sequences`` () = task { |
| 172 | + let! result = |
| 173 | + TaskSeq.map3 (fun a b c -> a + b + c) (TaskSeq.singleton 1) (TaskSeq.singleton 2) (TaskSeq.singleton 3) |
| 174 | + |> TaskSeq.toArrayAsync |
| 175 | + |
| 176 | + result |> should equal [| 6 |] |
| 177 | + } |
| 178 | + |
| 179 | + [<Fact>] |
| 180 | + let ``TaskSeq-map3Async works with singleton sequences`` () = task { |
| 181 | + let! result = |
| 182 | + TaskSeq.map3Async (fun a b c -> task { return a + b + c }) (TaskSeq.singleton 1) (TaskSeq.singleton 2) (TaskSeq.singleton 3) |
| 183 | + |> TaskSeq.toArrayAsync |
| 184 | + |
| 185 | + result |> should equal [| 6 |] |
| 186 | + } |
| 187 | + |
| 188 | + [<Fact>] |
| 189 | + let ``TaskSeq-map3 mapping function receives correct argument positions`` () = task { |
| 190 | + let! result = |
| 191 | + TaskSeq.map3 |
| 192 | + (fun (a: string) (b: int) (c: bool) -> (a, b, c)) |
| 193 | + (taskSeq { yield "x" }) |
| 194 | + (taskSeq { yield 42 }) |
| 195 | + (taskSeq { yield true }) |
| 196 | + |> TaskSeq.toArrayAsync |
| 197 | + |
| 198 | + result |> should equal [| ("x", 42, true) |] |
| 199 | + } |
| 200 | + |
| 201 | + |
| 202 | +module SideEffects = |
| 203 | + [<Theory; ClassData(typeof<TestSideEffectTaskSeq>)>] |
| 204 | + let ``TaskSeq-map3 can deal with side effects in sequences`` variant = task { |
| 205 | + let one = Gen.getSeqWithSideEffect variant |
| 206 | + let two = Gen.getSeqWithSideEffect variant |
| 207 | + let three = Gen.getSeqWithSideEffect variant |
| 208 | + |
| 209 | + let! result = |
| 210 | + TaskSeq.map3 (fun a b c -> a + b + c) one two three |
| 211 | + |> TaskSeq.toArrayAsync |
| 212 | + |
| 213 | + result |> should haveLength 10 |
| 214 | + |
| 215 | + result |
| 216 | + |> should equal (Array.init 10 (fun i -> (i + 1) * 3)) |
| 217 | + } |
| 218 | + |
| 219 | + [<Theory; ClassData(typeof<TestSideEffectTaskSeq>)>] |
| 220 | + let ``TaskSeq-map3Async can deal with side effects in sequences`` variant = task { |
| 221 | + let one = Gen.getSeqWithSideEffect variant |
| 222 | + let two = Gen.getSeqWithSideEffect variant |
| 223 | + let three = Gen.getSeqWithSideEffect variant |
| 224 | + |
| 225 | + let! result = |
| 226 | + TaskSeq.map3Async (fun a b c -> task { return a + b + c }) one two three |
| 227 | + |> TaskSeq.toArrayAsync |
| 228 | + |
| 229 | + result |> should haveLength 10 |
| 230 | + |
| 231 | + result |
| 232 | + |> should equal (Array.init 10 (fun i -> (i + 1) * 3)) |
| 233 | + } |
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