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TreeBuildingTest.fs
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// This file was created manually and its version is 2.0.0.
module TreeBuildingTest
open System
open FsUnit.Xunit
open Xunit
open TreeBuildingTypes
open TreeBuilding
[<Fact>]
let ``One node`` () =
let input =
[
{ RecordId = 0; ParentId = 0 }
]
let tree = buildTree input
isBranch tree |> should equal false
recordId tree |> should equal 0
children tree |> should be Empty
[<Fact>]
let ``Three nodes in order`` () =
let input =
[
{ RecordId = 0; ParentId = 0 };
{ RecordId = 1; ParentId = 0 };
{ RecordId = 2; ParentId = 0 };
]
let tree = buildTree input
isBranch tree |> should equal true
recordId tree |> should equal 0
children tree |> List.length |> should equal 2
children tree |> List.item 0 |> isBranch |> should equal false
children tree |> List.item 0 |> recordId |> should equal 1
children tree |> List.item 1 |> isBranch |> should equal false
children tree |> List.item 1 |> recordId |> should equal 2
[<Fact>]
let ``Three nodes in reverse order`` () =
let input =
[
{ RecordId = 2; ParentId = 0 };
{ RecordId = 1; ParentId = 0 };
{ RecordId = 0; ParentId = 0 };
]
let tree = buildTree input
isBranch tree |> should equal true
recordId tree |> should equal 0
children tree |> List.length |> should equal 2
children tree |> List.item 0 |> isBranch |> should equal false
children tree |> List.item 0 |> recordId |> should equal 1
children tree |> List.item 1 |> isBranch |> should equal false
children tree |> List.item 1 |> recordId |> should equal 2
[<Fact>]
let ``More than two children`` () =
let input =
[
{ RecordId = 3; ParentId = 0 };
{ RecordId = 2; ParentId = 0 };
{ RecordId = 1; ParentId = 0 };
{ RecordId = 0; ParentId = 0 };
]
let tree = buildTree input
isBranch tree |> should equal true
recordId tree |> should equal 0
children tree |> List.length |> should equal 3
children tree |> List.item 0 |> isBranch |> should equal false
children tree |> List.item 0 |> recordId |> should equal 1
children tree |> List.item 1 |> isBranch |> should equal false
children tree |> List.item 1 |> recordId |> should equal 2
children tree |> List.item 2 |> isBranch |> should equal false
children tree |> List.item 2 |> recordId |> should equal 3
[<Fact>]
let ``Binary tree`` () =
let input =
[
{ RecordId = 5; ParentId = 1 };
{ RecordId = 3; ParentId = 2 };
{ RecordId = 2; ParentId = 0 };
{ RecordId = 4; ParentId = 1 };
{ RecordId = 1; ParentId = 0 };
{ RecordId = 0; ParentId = 0 };
{ RecordId = 6; ParentId = 2 }
]
let tree = buildTree input
isBranch tree |> should equal true
recordId tree |> should equal 0
children tree |> List.length |> should equal 2
children tree |> List.item 0 |> isBranch |> should equal true
children tree |> List.item 0 |> recordId |> should equal 1
children tree |> List.item 0 |> children |> List.length |> should equal 2
children tree |> List.item 0 |> children |> List.item 0 |> isBranch |> should equal false
children tree |> List.item 0 |> children |> List.item 0 |> recordId |> should equal 4
children tree |> List.item 0 |> children |> List.item 1 |> isBranch |> should equal false
children tree |> List.item 0 |> children |> List.item 1 |> recordId |> should equal 5
children tree |> List.item 1 |> isBranch |> should equal true
children tree |> List.item 1 |> recordId |> should equal 2
children tree |> List.item 1 |> children |> List.length |> should equal 2
children tree |> List.item 1 |> children |> List.item 0 |> isBranch |> should equal false
children tree |> List.item 1 |> children |> List.item 0 |> recordId |> should equal 3
children tree |> List.item 1 |> children |> List.item 1 |> isBranch |> should equal false
children tree |> List.item 1 |> children |> List.item 1 |> recordId |> should equal 6
[<Fact>]
let ``Unbalanced tree`` () =
let input =
[
{ RecordId = 5; ParentId = 2 };
{ RecordId = 3; ParentId = 2 };
{ RecordId = 2; ParentId = 0 };
{ RecordId = 4; ParentId = 1 };
{ RecordId = 1; ParentId = 0 };
{ RecordId = 0; ParentId = 0 };
{ RecordId = 6; ParentId = 2 }
]
let tree = buildTree input
isBranch tree |> should equal true
recordId tree |> should equal 0
children tree |> List.length |> should equal 2
children tree |> List.item 0 |> isBranch |> should equal true
children tree |> List.item 0 |> recordId |> should equal 1
children tree |> List.item 0 |> children |> List.length |> should equal 1
children tree |> List.item 0 |> children |> List.item 0 |> isBranch |> should equal false
children tree |> List.item 0 |> children |> List.item 0 |> recordId |> should equal 4
children tree |> List.item 1 |> isBranch |> should equal true
children tree |> List.item 1 |> recordId |> should equal 2
children tree |> List.item 1 |> children |> List.length |> should equal 3
children tree |> List.item 1 |> children |> List.item 0 |> isBranch |> should equal false
children tree |> List.item 1 |> children |> List.item 0 |> recordId |> should equal 3
children tree |> List.item 1 |> children |> List.item 1 |> isBranch |> should equal false
children tree |> List.item 1 |> children |> List.item 1 |> recordId |> should equal 5
children tree |> List.item 1 |> children |> List.item 2 |> isBranch |> should equal false
children tree |> List.item 1 |> children |> List.item 2 |> recordId |> should equal 6
[<Fact>]
let ``Empty input`` () =
let input = []
(fun () -> buildTree input |> ignore) |> should throw typeof<Exception>
[<Fact>]
let ``Root node has parent`` () =
let input =
[ { RecordId = 0; ParentId = 1 };
{ RecordId = 1; ParentId = 0 } ]
(fun () -> buildTree input |> ignore) |> should throw typeof<Exception>
[<Fact>]
let ``No root node`` () =
let input = [ { RecordId = 1; ParentId = 0 } ]
(fun () -> buildTree input |> ignore) |> should throw typeof<Exception>
[<Fact>]
let ``Non-continuous`` () =
let input =
[
{ RecordId = 2; ParentId = 0 };
{ RecordId = 4; ParentId = 2 };
{ RecordId = 1; ParentId = 0 };
{ RecordId = 0; ParentId = 0 }
]
(fun () -> buildTree input |> ignore) |> should throw typeof<Exception>
[<Fact>]
let ``Cycle directly`` () =
let input =
[
{ RecordId = 5; ParentId = 2 };
{ RecordId = 3; ParentId = 2 };
{ RecordId = 2; ParentId = 2 };
{ RecordId = 4; ParentId = 1 };
{ RecordId = 1; ParentId = 0 };
{ RecordId = 0; ParentId = 0 };
{ RecordId = 6; ParentId = 3 }
]
(fun () -> buildTree input |> ignore) |> should throw typeof<Exception>
[<Fact>]
let ``Cycle indirectly`` () =
let input =
[
{ RecordId = 5; ParentId = 2 };
{ RecordId = 3; ParentId = 2 };
{ RecordId = 2; ParentId = 6 };
{ RecordId = 4; ParentId = 1 };
{ RecordId = 1; ParentId = 0 };
{ RecordId = 0; ParentId = 0 };
{ RecordId = 6; ParentId = 3 }
]
(fun () -> buildTree input |> ignore) |> should throw typeof<Exception>
[<Fact>]
let ``Higher id parent of lower id`` () =
let input =
[
{ RecordId = 0; ParentId = 0 };
{ RecordId = 2; ParentId = 0 };
{ RecordId = 1; ParentId = 2 }
]
(fun () -> buildTree input |> ignore) |> should throw typeof<Exception>