Add stock buy to holdings minimal vertical slice (3d-21)

2 files changed, 167 insertions, 0 deletions

diff --git a/tests/FundLab.Api.Tests/FundLab.Api.Tests.fsproj b/tests/FundLab.Api.Tests/FundLab.Api.Tests.fsproj
index 83c96bc..65352a7 100644
--- a/tests/FundLab.Api.Tests/FundLab.Api.Tests.fsproj
+++ b/tests/FundLab.Api.Tests/FundLab.Api.Tests.fsproj
@@ -34,6 +34,7 @@
         <Compile Include="BondQuoteProbeTests.fs" />
         <Compile Include="StockQuoteProbeTests.fs" />
         <Compile Include="StockDailyProbeTests.fs" />
+        <Compile Include="StockTradeTests.fs" />
     <Compile Include="Program.fs" />
   </ItemGroup>
 </Project>
diff --git a/tests/FundLab.Api.Tests/StockTradeTests.fs b/tests/FundLab.Api.Tests/StockTradeTests.fs
new file mode 100644
index 0000000..a2269a1
--- /dev/null
+++ b/tests/FundLab.Api.Tests/StockTradeTests.fs
@@ -0,0 +1,166 @@
+namespace FundLab.Api.Tests
+
+open System
+open System.Threading
+open Xunit
+open FundLab.Api
+
+module StockTradeSupport =
+    let stubQuoteProbe (quote: StockQuote) =
+        { new IStockQuoteProbe with
+            member _.GetQuote(_, _) = Ok quote }
+
+    let failingQuoteProbe (failure: MarketDataFailure) =
+        { new IStockQuoteProbe with
+            member _.GetQuote(_, _) = Error failure }
+
+    let quote600519 =
+        {
+            Code = "600519"
+            Name = Some "贵州茅台"
+            Price = Some 1252.57m
+            Currency = "CNY"
+        }
+
+    let appWithQuote (probe: IStockQuoteProbe) =
+        { NavDates = NavDateProbeSupport.stubNavDateProbe
+          NavSeries = NavDateProbeSupport.stubNavSeriesProbe
+          BondQuotes = NavDateProbeSupport.stubBondQuoteProbe
+          StockQuotes = probe
+          StockDaily = NavDateProbeSupport.stubStockDailyProbe }
+
+[<Collection("postgres")>]
+type StockTradeTests(fixture: PostgresFixture) =
+    let sharedRepository =
+        lazy
+            let value = FundRepository(fixture.ConnectionString)
+            value.EnsureSchema()
+            value
+
+    let repository () = sharedRepository.Value
+
+    let createFund () =
+        let command =
+            {
+                Name = "股票闭环测试 FOF"
+                InitialCash = 100000.00m
+                InitialUnitNav = 1.00000000m
+                IsSynthetic = true
+            }
+
+        let key = fixture.Key(sprintf "stock-trade-fund-%s" (Guid.NewGuid().ToString("N")))
+
+        match repository().CreateFund(key, command) with
+        | FundWriteResult.Created fund -> fund.Id
+        | other -> failwithf "unexpected fund creation result: %A" other
+
+    let app probe =
+        let probes = StockTradeSupport.appWithQuote probe
+        App.createApplicationWithProbes (repository ()) probes
+
+    let buy (probe: IStockQuoteProbe) fundId body idempotencyKey =
+        PersistenceTestHelpers.invoke
+            (app probe)
+            "POST"
+            (sprintf "/api/funds/%O/stock-trades" fundId)
+            [ "Authorization", "Bearer test-token"; "Idempotency-Key", idempotencyKey ]
+            body
+
+    let readPositions (probe: IStockQuoteProbe) fundId =
+        PersistenceTestHelpers.invoke
+            (app probe)
+            "GET"
+            (sprintf "/api/funds/%O/stock-positions" fundId)
+            [ "Authorization", "Bearer test-token" ]
+            ""
+
+    [<Fact>]
+    member _.``buying a stock with a live quote records a trade and a position``() =
+        let fundId = createFund ()
+        let probe = StockTradeSupport.stubQuoteProbe StockTradeSupport.quote600519
+
+        let status, body =
+            buy probe fundId """{"instrumentCode":"600519","quantity":"100"}""" (fixture.Key "stock-trade-buy-ok")
+
+        Assert.Equal(201, status)
+        Assert.Contains("\"instrumentCode\":\"600519\"", body)
+        Assert.Contains("贵州茅台", body)
+        Assert.Contains("1252.57", body)
+        Assert.Contains("125257.00", body)
+
+        let status, positionsBody = readPositions probe fundId
+        Assert.Equal(200, status)
+        Assert.Contains("\"instrumentCode\":\"600519\"", positionsBody)
+        Assert.Contains("\"quantity\":\"100.00000000\"", positionsBody)
+        Assert.Contains("125257.00", positionsBody)
+
+    [<Fact>]
+    member _.``buying an unknown code with an unavailable quote does not create a position``() =
+        let fundId = createFund ()
+
+        let probe =
+            StockTradeSupport.failingQuoteProbe (
+                MarketDataCollectorUnavailable "AKShare collector failed: no valid quote for 999999"
+            )
+
+        let status, body =
+            buy probe fundId """{"instrumentCode":"999999","quantity":"100"}""" (fixture.Key "stock-trade-unknown")
+
+        Assert.Equal(503, status)
+        Assert.Contains("MARKET_DATA_UNAVAILABLE", body)
+
+        let status, positionsBody = readPositions probe fundId
+        Assert.Equal(200, status)
+        Assert.DoesNotContain("999999", positionsBody)
+        Assert.Contains("\"positions\":[]", positionsBody)
+
+    [<Fact>]
+    member _.``buying with a non-positive quantity is rejected without a position``() =
+        let fundId = createFund ()
+        let probe = StockTradeSupport.stubQuoteProbe StockTradeSupport.quote600519
+
+        let status, body =
+            buy probe fundId """{"instrumentCode":"600519","quantity":"0"}""" (fixture.Key "stock-trade-zero")
+
+        Assert.Equal(400, status)
+        Assert.Contains("INVALID_STOCK_TRADE_REQUEST", body)
+
+        let _, positionsBody = readPositions probe fundId
+        Assert.Contains("\"positions\":[]", positionsBody)
+
+    [<Fact>]
+    member _.``buying with a malformed code is rejected``() =
+        let fundId = createFund ()
+        let probe = StockTradeSupport.stubQuoteProbe StockTradeSupport.quote600519
+
+        let status, body =
+            buy probe fundId """{"instrumentCode":"abc","quantity":"100"}""" (fixture.Key "stock-trade-badcode")
+
+        Assert.Equal(400, status)
+        Assert.Contains("six digits", body)
+
+    [<Fact>]
+    member _.``replaying a buy with the same idempotency key does not double the position``() =
+        let fundId = createFund ()
+        let probe = StockTradeSupport.stubQuoteProbe StockTradeSupport.quote600519
+        let key = fixture.Key "stock-trade-replay"
+
+        let status, _ = buy probe fundId """{"instrumentCode":"600519","quantity":"100"}""" key
+        Assert.Equal(201, status)
+
+        let status, _ = buy probe fundId """{"instrumentCode":"600519","quantity":"100"}""" key
+        Assert.Equal(200, status)
+
+        let _, positionsBody = readPositions probe fundId
+        Assert.Contains("\"quantity\":\"100.00000000\"", positionsBody)
+        Assert.DoesNotContain("\"quantity\":\"200.00000000\"", positionsBody)
+
+    [<Fact>]
+    member _.``buying a fund that does not exist answers 404``() =
+        let probe = StockTradeSupport.stubQuoteProbe StockTradeSupport.quote600519
+
+        let status, body =
+            buy probe (Guid.NewGuid()) """{"instrumentCode":"600519","quantity":"100"}""" (fixture.Key "stock-trade-missing")
+
+        Assert.Equal(404, status)
+        Assert.Contains("FUND_NOT_FOUND", body)