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| 1 | +module TaskSeq.Tests.Map2Iter2 |
| 2 | + |
| 3 | +open System.Threading.Tasks |
| 4 | +open Xunit |
| 5 | +open FsUnit.Xunit |
| 6 | + |
| 7 | +open FSharp.Control |
| 8 | + |
| 9 | +// |
| 10 | +// TaskSeq.iter2 |
| 11 | +// TaskSeq.iter2Async |
| 12 | +// TaskSeq.map2 |
| 13 | +// TaskSeq.map2Async |
| 14 | +// |
| 15 | + |
| 16 | +module Iter2EmptySeq = |
| 17 | + [<Fact>] |
| 18 | + let ``Null source is invalid for iter2`` () = |
| 19 | + assertNullArg |
| 20 | + <| fun () -> TaskSeq.iter2 (fun _ _ -> ()) null TaskSeq.empty |
| 21 | + |
| 22 | + assertNullArg |
| 23 | + <| fun () -> TaskSeq.iter2 (fun _ _ -> ()) TaskSeq.empty null |
| 24 | + |
| 25 | + [<Fact>] |
| 26 | + let ``Null source is invalid for iter2Async`` () = |
| 27 | + assertNullArg |
| 28 | + <| fun () -> TaskSeq.iter2Async (fun _ _ -> Task.fromResult ()) null TaskSeq.empty |
| 29 | + |
| 30 | + assertNullArg |
| 31 | + <| fun () -> TaskSeq.iter2Async (fun _ _ -> Task.fromResult ()) TaskSeq.empty null |
| 32 | + |
| 33 | + [<Theory; ClassData(typeof<TestEmptyVariants>)>] |
| 34 | + let ``TaskSeq-iter2 does nothing on two empty sequences`` variant = task { |
| 35 | + let tq = Gen.getEmptyVariant variant |
| 36 | + let mutable sum = 0 |
| 37 | + do! TaskSeq.iter2 (fun a b -> sum <- sum + a + b) tq tq |
| 38 | + sum |> should equal 0 |
| 39 | + } |
| 40 | + |
| 41 | + [<Theory; ClassData(typeof<TestEmptyVariants>)>] |
| 42 | + let ``TaskSeq-iter2 does nothing when first sequence is empty`` variant = task { |
| 43 | + let tq = Gen.getEmptyVariant variant |
| 44 | + let mutable sum = 0 |
| 45 | + do! TaskSeq.iter2 (fun a b -> sum <- sum + a + b) tq (taskSeq { yield! [ 1..10 ] }) |
| 46 | + sum |> should equal 0 |
| 47 | + } |
| 48 | + |
| 49 | + [<Theory; ClassData(typeof<TestEmptyVariants>)>] |
| 50 | + let ``TaskSeq-iter2 does nothing when second sequence is empty`` variant = task { |
| 51 | + let tq = Gen.getEmptyVariant variant |
| 52 | + let mutable sum = 0 |
| 53 | + do! TaskSeq.iter2 (fun a b -> sum <- sum + a + b) (taskSeq { yield! [ 1..10 ] }) tq |
| 54 | + sum |> should equal 0 |
| 55 | + } |
| 56 | + |
| 57 | + [<Theory; ClassData(typeof<TestEmptyVariants>)>] |
| 58 | + let ``TaskSeq-iter2Async does nothing on two empty sequences`` variant = task { |
| 59 | + let tq = Gen.getEmptyVariant variant |
| 60 | + let mutable sum = 0 |
| 61 | + |
| 62 | + do! |
| 63 | + TaskSeq.iter2Async |
| 64 | + (fun a b -> |
| 65 | + sum <- sum + a + b |
| 66 | + Task.fromResult ()) |
| 67 | + tq |
| 68 | + tq |
| 69 | + |
| 70 | + sum |> should equal 0 |
| 71 | + } |
| 72 | + |
| 73 | +module Iter2Immutable = |
| 74 | + [<Theory; ClassData(typeof<TestImmTaskSeq>)>] |
| 75 | + let ``TaskSeq-iter2 visits all paired elements in order`` variant = task { |
| 76 | + let one = Gen.getSeqImmutable variant |
| 77 | + let two = Gen.getSeqImmutable variant |
| 78 | + let results = System.Collections.Generic.List<int * int>() |
| 79 | + do! TaskSeq.iter2 (fun a b -> results.Add(a, b)) one two |
| 80 | + results.Count |> should equal 10 |
| 81 | + |
| 82 | + results |
| 83 | + |> Seq.forall (fun (a, b) -> a = b) |
| 84 | + |> should be True |
| 85 | + |
| 86 | + results |
| 87 | + |> Seq.map fst |
| 88 | + |> Seq.toArray |
| 89 | + |> should equal [| 1..10 |] |
| 90 | + } |
| 91 | + |
| 92 | + [<Theory; ClassData(typeof<TestImmTaskSeq>)>] |
| 93 | + let ``TaskSeq-iter2Async visits all paired elements in order`` variant = task { |
| 94 | + let one = Gen.getSeqImmutable variant |
| 95 | + let two = Gen.getSeqImmutable variant |
| 96 | + let results = System.Collections.Generic.List<int * int>() |
| 97 | + |
| 98 | + do! |
| 99 | + TaskSeq.iter2Async |
| 100 | + (fun a b -> |
| 101 | + results.Add(a, b) |
| 102 | + Task.fromResult ()) |
| 103 | + one |
| 104 | + two |
| 105 | + |
| 106 | + results.Count |> should equal 10 |
| 107 | + |
| 108 | + results |
| 109 | + |> Seq.forall (fun (a, b) -> a = b) |
| 110 | + |> should be True |
| 111 | + |
| 112 | + results |
| 113 | + |> Seq.map fst |
| 114 | + |> Seq.toArray |
| 115 | + |> should equal [| 1..10 |] |
| 116 | + } |
| 117 | + |
| 118 | + [<Fact>] |
| 119 | + let ``TaskSeq-iter2 truncates to shorter sequence when first is shorter`` () = task { |
| 120 | + let short = taskSeq { yield! [ 1..3 ] } |
| 121 | + let long = taskSeq { yield! [ 1..10 ] } |
| 122 | + let mutable count = 0 |
| 123 | + do! TaskSeq.iter2 (fun _ _ -> count <- count + 1) short long |
| 124 | + count |> should equal 3 |
| 125 | + } |
| 126 | + |
| 127 | + [<Fact>] |
| 128 | + let ``TaskSeq-iter2 truncates to shorter sequence when second is shorter`` () = task { |
| 129 | + let long = taskSeq { yield! [ 1..10 ] } |
| 130 | + let short = taskSeq { yield! [ 1..3 ] } |
| 131 | + let mutable count = 0 |
| 132 | + do! TaskSeq.iter2 (fun _ _ -> count <- count + 1) long short |
| 133 | + count |> should equal 3 |
| 134 | + } |
| 135 | + |
| 136 | + [<Fact>] |
| 137 | + let ``TaskSeq-iter2 can combine different element types`` () = task { |
| 138 | + let ints = taskSeq { yield! [ 1; 2; 3 ] } |
| 139 | + let strs = taskSeq { yield! [ "a"; "b"; "c" ] } |
| 140 | + let results = System.Collections.Generic.List<int * string>() |
| 141 | + do! TaskSeq.iter2 (fun n s -> results.Add(n, s)) ints strs |
| 142 | + results.Count |> should equal 3 |
| 143 | + |
| 144 | + results |
| 145 | + |> Seq.toList |
| 146 | + |> should equal [ (1, "a"); (2, "b"); (3, "c") ] |
| 147 | + } |
| 148 | + |
| 149 | +module Map2EmptySeq = |
| 150 | + [<Fact>] |
| 151 | + let ``Null source is invalid for map2`` () = |
| 152 | + assertNullArg |
| 153 | + <| fun () -> TaskSeq.map2 (fun _ _ -> ()) null TaskSeq.empty<int> |
| 154 | + |
| 155 | + assertNullArg |
| 156 | + <| fun () -> TaskSeq.map2 (fun _ _ -> ()) TaskSeq.empty<int> null |
| 157 | + |
| 158 | + [<Fact>] |
| 159 | + let ``Null source is invalid for map2Async`` () = |
| 160 | + assertNullArg |
| 161 | + <| fun () -> TaskSeq.map2Async (fun _ _ -> Task.fromResult ()) null TaskSeq.empty<int> |
| 162 | + |
| 163 | + assertNullArg |
| 164 | + <| fun () -> TaskSeq.map2Async (fun _ _ -> Task.fromResult ()) TaskSeq.empty<int> null |
| 165 | + |
| 166 | + [<Theory; ClassData(typeof<TestEmptyVariants>)>] |
| 167 | + let ``TaskSeq-map2 returns empty on two empty sequences`` variant = |
| 168 | + TaskSeq.map2 (fun a b -> a + b) (Gen.getEmptyVariant variant) (Gen.getEmptyVariant variant) |
| 169 | + |> verifyEmpty |
| 170 | + |
| 171 | + [<Theory; ClassData(typeof<TestEmptyVariants>)>] |
| 172 | + let ``TaskSeq-map2 returns empty when first sequence is empty`` variant = |
| 173 | + TaskSeq.map2 (fun a b -> a + b) (Gen.getEmptyVariant variant) (taskSeq { yield! [ 1..10 ] }) |
| 174 | + |> verifyEmpty |
| 175 | + |
| 176 | + [<Theory; ClassData(typeof<TestEmptyVariants>)>] |
| 177 | + let ``TaskSeq-map2 returns empty when second sequence is empty`` variant = |
| 178 | + TaskSeq.map2 (fun a b -> a + b) (taskSeq { yield! [ 1..10 ] }) (Gen.getEmptyVariant variant) |
| 179 | + |> verifyEmpty |
| 180 | + |
| 181 | + [<Theory; ClassData(typeof<TestEmptyVariants>)>] |
| 182 | + let ``TaskSeq-map2Async returns empty on two empty sequences`` variant = |
| 183 | + TaskSeq.map2Async (fun a b -> Task.fromResult (a + b)) (Gen.getEmptyVariant variant) (Gen.getEmptyVariant variant) |
| 184 | + |> verifyEmpty |
| 185 | + |
| 186 | +module Map2Immutable = |
| 187 | + [<Theory; ClassData(typeof<TestImmTaskSeq>)>] |
| 188 | + let ``TaskSeq-map2 maps all paired elements in order`` variant = task { |
| 189 | + let one = Gen.getSeqImmutable variant |
| 190 | + let two = Gen.getSeqImmutable variant |
| 191 | + |
| 192 | + let! result = |
| 193 | + TaskSeq.map2 (fun a b -> a + b) one two |
| 194 | + |> TaskSeq.toArrayAsync |
| 195 | + |
| 196 | + result |> should haveLength 10 |
| 197 | + |
| 198 | + result |
| 199 | + |> should equal (Array.init 10 (fun i -> (i + 1) * 2)) |
| 200 | + } |
| 201 | + |
| 202 | + [<Theory; ClassData(typeof<TestImmTaskSeq>)>] |
| 203 | + let ``TaskSeq-map2Async maps all paired elements in order`` variant = task { |
| 204 | + let one = Gen.getSeqImmutable variant |
| 205 | + let two = Gen.getSeqImmutable variant |
| 206 | + |
| 207 | + let! result = |
| 208 | + TaskSeq.map2Async (fun a b -> Task.fromResult (a + b)) one two |
| 209 | + |> TaskSeq.toArrayAsync |
| 210 | + |
| 211 | + result |> should haveLength 10 |
| 212 | + |
| 213 | + result |
| 214 | + |> should equal (Array.init 10 (fun i -> (i + 1) * 2)) |
| 215 | + } |
| 216 | + |
| 217 | + [<Fact>] |
| 218 | + let ``TaskSeq-map2 truncates to shorter sequence when first is shorter`` () = task { |
| 219 | + let short = taskSeq { yield! [ 1..3 ] } |
| 220 | + let long = taskSeq { yield! [ 10..19 ] } |
| 221 | + |
| 222 | + let! result = |
| 223 | + TaskSeq.map2 (fun a b -> a + b) short long |
| 224 | + |> TaskSeq.toArrayAsync |
| 225 | + |
| 226 | + result |> should haveLength 3 |
| 227 | + result |> should equal [| 11; 13; 15 |] |
| 228 | + } |
| 229 | + |
| 230 | + [<Fact>] |
| 231 | + let ``TaskSeq-map2 truncates to shorter sequence when second is shorter`` () = task { |
| 232 | + let long = taskSeq { yield! [ 10..19 ] } |
| 233 | + let short = taskSeq { yield! [ 1..3 ] } |
| 234 | + |
| 235 | + let! result = |
| 236 | + TaskSeq.map2 (fun a b -> a + b) long short |
| 237 | + |> TaskSeq.toArrayAsync |
| 238 | + |
| 239 | + result |> should haveLength 3 |
| 240 | + result |> should equal [| 11; 13; 15 |] |
| 241 | + } |
| 242 | + |
| 243 | + [<Fact>] |
| 244 | + let ``TaskSeq-map2 can produce different types`` () = task { |
| 245 | + let ints = taskSeq { yield! [ 1; 2; 3 ] } |
| 246 | + let strs = taskSeq { yield! [ "a"; "b"; "c" ] } |
| 247 | + |
| 248 | + let! result = |
| 249 | + TaskSeq.map2 (fun n s -> sprintf "%d%s" n s) ints strs |
| 250 | + |> TaskSeq.toArrayAsync |
| 251 | + |
| 252 | + result |> should equal [| "1a"; "2b"; "3c" |] |
| 253 | + } |
| 254 | + |
| 255 | + [<Fact>] |
| 256 | + let ``TaskSeq-map2 works with equal-length sequences`` () = task { |
| 257 | + let s1 = taskSeq { yield! [ 1..5 ] } |
| 258 | + let s2 = taskSeq { yield! [ 10..14 ] } |
| 259 | + |
| 260 | + let! result = |
| 261 | + TaskSeq.map2 (fun a b -> a * b) s1 s2 |
| 262 | + |> TaskSeq.toArrayAsync |
| 263 | + |
| 264 | + result |> should haveLength 5 |
| 265 | + result |> should equal [| 10; 22; 36; 52; 70 |] |
| 266 | + } |
| 267 | + |
| 268 | + [<Fact>] |
| 269 | + let ``TaskSeq-map2Async can use async work in mapping`` () = task { |
| 270 | + let s1 = taskSeq { yield! [ 1..3 ] } |
| 271 | + let s2 = taskSeq { yield! [ 4..6 ] } |
| 272 | + |
| 273 | + let! result = |
| 274 | + TaskSeq.map2Async |
| 275 | + (fun a b -> task { |
| 276 | + do! Task.Delay(0) |
| 277 | + return a + b |
| 278 | + }) |
| 279 | + s1 |
| 280 | + s2 |
| 281 | + |> TaskSeq.toArrayAsync |
| 282 | + |
| 283 | + result |> should equal [| 5; 7; 9 |] |
| 284 | + } |
| 285 | + |
| 286 | +module Map2SideEffects = |
| 287 | + [<Theory; ClassData(typeof<TestSideEffectTaskSeq>)>] |
| 288 | + let ``TaskSeq-map2 works correctly with side-effect sequences`` variant = task { |
| 289 | + let one = Gen.getSeqWithSideEffect variant |
| 290 | + let two = Gen.getSeqWithSideEffect variant |
| 291 | + |
| 292 | + let! result = |
| 293 | + TaskSeq.map2 (fun a b -> a + b) one two |
| 294 | + |> TaskSeq.toArrayAsync |
| 295 | + |
| 296 | + result |> should haveLength 10 |
| 297 | + |
| 298 | + result |
| 299 | + |> Array.forall (fun x -> x % 2 = 0) |
| 300 | + |> should be True |
| 301 | + } |
| 302 | + |
| 303 | + [<Theory; ClassData(typeof<TestSideEffectTaskSeq>)>] |
| 304 | + let ``TaskSeq-iter2 works correctly with side-effect sequences`` variant = task { |
| 305 | + let one = Gen.getSeqWithSideEffect variant |
| 306 | + let two = Gen.getSeqWithSideEffect variant |
| 307 | + let mutable count = 0 |
| 308 | + do! TaskSeq.iter2 (fun _ _ -> count <- count + 1) one two |
| 309 | + count |> should equal 10 |
| 310 | + } |
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