test(integration): pagination edge cases (prd-003-prices-pagination)
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@@ -440,6 +440,77 @@ public class ProductPriceRepositoryIntegrationTests : IAsyncLifetime
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page2.Total.Should().Be(6);
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}
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// §B3.2 — 30 prices: page 1 and page 2 (pageSize=10) are fully disjoint,
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// union = 20 distinct items, each page is ordered DESC by PriceValidFrom.
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[Fact]
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public async Task GetByProductIdAsync_ThirtyPrices_TwoPages_AreDisjointAndOrderedDesc()
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{
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await using var seedConn = new SqlConnection(TestConnectionStrings.AppTestDb);
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await seedConn.OpenAsync();
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// Insert 30 prices directly (bypass SP to avoid forward-only complexity).
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// All rows get an explicit PriceValidTo so no unique-index violation.
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// PVF: 2026-01-01 to 2026-01-30 (ascending), all closed (PVT = PVF + 1 day).
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// Except row 30 which has PVT = NULL (the single active row).
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for (var i = 1; i <= 30; i++)
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{
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DateTime? pvt = i < 30
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? (DateTime?)new DateTime(2026, 1, i + 1)
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: null;
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await seedConn.ExecuteAsync("""
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INSERT INTO dbo.ProductPrices (ProductId, Price, PriceValidFrom, PriceValidTo, FechaCreacion)
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VALUES (@ProductId, @Price, @PriceValidFrom, @PriceValidTo, SYSUTCDATETIME())
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""",
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new
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{
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ProductId = _defaultProductId,
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Price = (decimal)(i * 10),
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PriceValidFrom = new DateTime(2026, 1, i),
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PriceValidTo = pvt
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});
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}
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var repo = BuildRepository();
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var page1 = await repo.GetByProductIdAsync(_defaultProductId, page: 1, pageSize: 10);
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var page2 = await repo.GetByProductIdAsync(_defaultProductId, page: 2, pageSize: 10);
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// Both pages must reflect the full dataset
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page1.Total.Should().Be(30);
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page2.Total.Should().Be(30);
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// Each page must have exactly 10 items
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page1.Items.Should().HaveCount(10);
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page2.Items.Should().HaveCount(10);
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// Page meta
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page1.Page.Should().Be(1);
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page1.PageSize.Should().Be(10);
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page2.Page.Should().Be(2);
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page2.PageSize.Should().Be(10);
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// The two ID sets must be fully disjoint
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var ids1 = page1.Items.Select(p => p.PriceValidFrom).ToHashSet();
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var ids2 = page2.Items.Select(p => p.PriceValidFrom).ToHashSet();
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ids1.Intersect(ids2).Should().BeEmpty("pages must not share any items");
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// Union covers exactly 20 distinct items
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ids1.Union(ids2).Should().HaveCount(20, "union of two pages of 10 must yield 20 distinct items");
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// Page 1 must be ordered DESC — first item is PVF Jan 30 (most recent)
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page1.Items[0].PriceValidFrom.Should().Be(new DateOnly(2026, 1, 30),
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"page 1 rank-1 must be the most recent price (DESC)");
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page1.Items[9].PriceValidFrom.Should().Be(new DateOnly(2026, 1, 21),
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"page 1 rank-10 must be Jan 21");
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// Page 2 must continue DESC — first item is PVF Jan 20
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page2.Items[0].PriceValidFrom.Should().Be(new DateOnly(2026, 1, 20),
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"page 2 rank-1 must be Jan 20 (rank 11 globally in DESC order)");
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page2.Items[9].PriceValidFrom.Should().Be(new DateOnly(2026, 1, 11),
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"page 2 rank-10 must be Jan 11");
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}
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// §REQ-4.4 — GetActiveAsync: exact boundary PriceValidFrom = query date → returns row
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[Fact]
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public async Task GetActiveAsync_ExactBoundaryPvf_ReturnsRow()
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