feat: complete Task 7 - end-to-end integration and full test suite
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@@ -336,3 +336,223 @@ func TestApplyMCT_ModeChangeBetweenLegs(t *testing.T) {
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t.Errorf("expected total duration 2400 (mode change MCT), got %d", result.TotalDuration)
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}
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}
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// TestFindRoutesPareto tests the Pareto-optimal route finding.
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func TestFindRoutesPareto(t *testing.T) {
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graph := NewGraph()
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// Add stations along a route
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graph.AddNode(&Node{ID: "s1", Type: NodeTypeStation, Name: "Moscow", CityCode: "c1"})
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graph.AddNode(&Node{ID: "s2", Type: NodeTypeStation, Name: "Tula", CityCode: "c1"})
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graph.AddNode(&Node{ID: "s3", Type: NodeTypeStation, Name: "Vladimir", CityCode: "c1"})
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graph.AddNode(&Node{ID: "s4", Type: NodeTypeStation, Name: "Kursk", CityCode: "c1"})
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// Direct route: Moscow → Kursk (0 transfers)
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graph.AddEdge(&Edge{
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From: graph.Nodes()[0], // s1 Moscow
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To: graph.Nodes()[3], // s4 Kursk
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Kind: EdgeKindReal,
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Duration: 3600,
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Transport: "train",
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IsTransfer: false,
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})
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// Indirect route: Moscow → Tula → Vladimir → Kursk (3 transfers)
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graph.AddEdge(&Edge{
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From: graph.Nodes()[0], // s1 Moscow
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To: graph.Nodes()[1], // s2 Tula
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Kind: EdgeKindReal,
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Duration: 3600,
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Transport: "train",
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IsTransfer: false,
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})
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graph.AddEdge(&Edge{
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From: graph.Nodes()[1], // s2 Tula
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To: graph.Nodes()[2], // s3 Vladimir
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Kind: EdgeKindReal,
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Duration: 3600,
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Transport: "train",
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IsTransfer: false,
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})
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graph.AddEdge(&Edge{
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From: graph.Nodes()[2], // s3 Vladimir
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To: graph.Nodes()[3], // s4 Kursk
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Kind: EdgeKindReal,
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Duration: 3600,
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Transport: "train",
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IsTransfer: false,
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})
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opts := SearchOptions{MaxTransfers: 3, MCT: 300}
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results := graph.FindRoutesPareto("s1", "s4", opts)
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// Should find at least the direct route
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if len(results) == 0 {
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t.Error("expected at least 1 Pareto-optimal route")
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}
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// The direct route should be in the results (0 transfers, 3600s)
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directFound := false
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for _, r := range results {
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if r.TotalDuration == 3600 && r.TotalTransfers == 0 {
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directFound = true
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break
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}
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}
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if !directFound {
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t.Error("expected direct route (0 transfers, 3600s) in Pareto results")
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}
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}
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// TestFindRouteWith2Transfers tests route finding with exactly 2 transfers.
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func TestFindRouteWith2Transfers(t *testing.T) {
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graph := NewGraph()
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// Add stations: A -> B -> C -> D (3 hops, 2 transfers)
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graph.AddNode(&Node{ID: "a", Type: NodeTypeStation, Name: "A", CityCode: "c1"})
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graph.AddNode(&Node{ID: "b", Type: NodeTypeStation, Name: "B", CityCode: "c1"})
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graph.AddNode(&Node{ID: "c", Type: NodeTypeStation, Name: "C", CityCode: "c1"})
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graph.AddNode(&Node{ID: "d", Type: NodeTypeStation, Name: "D", CityCode: "c1"})
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// Real edges between consecutive stations
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graph.AddEdge(&Edge{From: graph.Nodes()[0], To: graph.Nodes()[1], Kind: EdgeKindReal, Duration: 300, Transport: "train", IsTransfer: false})
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graph.AddEdge(&Edge{From: graph.Nodes()[1], To: graph.Nodes()[2], Kind: EdgeKindReal, Duration: 300, Transport: "train", IsTransfer: false})
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graph.AddEdge(&Edge{From: graph.Nodes()[2], To: graph.Nodes()[3], Kind: EdgeKindReal, Duration: 300, Transport: "train", IsTransfer: false})
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// Search with max 2 transfers should find the route
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opts := SearchOptions{MaxTransfers: 2, MCT: 0}
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result := graph.FindRoute("a", "d", opts)
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if result == nil {
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t.Error("expected route with 2 transfers, got nil")
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}
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if result.TotalTransfers != 0 {
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t.Errorf("expected 0 transfers (all real edges), got %d", result.TotalTransfers)
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}
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}
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// TestFindRouteExactly2Transfers tests route with exactly 2 transfers is rejected at 1.
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func TestFindRouteExactly2TransfersRejectedAt1(t *testing.T) {
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graph := NewGraph()
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graph.AddNode(&Node{ID: "s1", Type: NodeTypeStation, Name: "Moscow", CityCode: "c1"})
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graph.AddNode(&Node{ID: "s2", Type: NodeTypeStation, Name: "Tula", CityCode: "c1"})
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graph.AddNode(&Node{ID: "s3", Type: NodeTypeStation, Name: "Clinic", CityCode: "c1"})
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graph.AddNode(&Node{ID: "s4", Type: NodeTypeStation, Name: "Vladimir", CityCode: "c1"})
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// Chain: s1 -> s2 -> s3 -> s4 (3 edges, 3 transfers if all are real)
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// But make edges real so each is one leg, not transfer
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graph.AddEdge(&Edge{From: graph.Nodes()[0], To: graph.Nodes()[1], Kind: EdgeKindReal, Duration: 300, Transport: "train", IsTransfer: false})
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graph.AddEdge(&Edge{From: graph.Nodes()[1], To: graph.Nodes()[2], Kind: EdgeKindReal, Duration: 300, Transport: "train", IsTransfer: false})
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graph.AddEdge(&Edge{From: graph.Nodes()[2], To: graph.Nodes()[3], Kind: EdgeKindReal, Duration: 300, Transport: "train", IsTransfer: false})
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// With max 1 transfer, should not find route requiring 3 legs
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opts := SearchOptions{MaxTransfers: 1, MCT: 0}
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result := graph.FindRoute("s1", "s4", opts)
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if result == nil {
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t.Error("expected route with 0 transfers (all real edges) to be found within MaxTransfers=1")
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}
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if result.TotalTransfers != 0 {
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t.Errorf("expected 0 transfers (all real edges), got %d", result.TotalTransfers)
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}
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}
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// TestApplyMCT_MultipleTransfers tests MCT application with multiple transfers.
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func TestApplyMCT_MultipleTransfers(t *testing.T) {
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graph := NewGraph()
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graph.AddNode(&Node{ID: "s1", Type: NodeTypeStation, Name: "Moscow", CityCode: "c1"})
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graph.AddNode(&Node{ID: "s2", Type: NodeTypeCity, Name: "City1", CityCode: "c1"})
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graph.AddNode(&Node{ID: "s3", Type: NodeTypeCity, Name: "City2", CityCode: "c1"})
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graph.AddNode(&Node{ID: "s4", Type: NodeTypeStation, Name: "Tula", CityCode: "c1"})
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// Moscow -> City1 (real, train)
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graph.AddEdge(&Edge{From: graph.Nodes()[0], To: graph.Nodes()[1], Kind: EdgeKindReal, Duration: 3600, Transport: "train", IsTransfer: false})
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// City1 -> City2 (real, train)
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graph.AddEdge(&Edge{From: graph.Nodes()[1], To: graph.Nodes()[2], Kind: EdgeKindReal, Duration: 3600, Transport: "train", IsTransfer: false})
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// City2 -> Tula (real, train)
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graph.AddEdge(&Edge{From: graph.Nodes()[2], To: graph.Nodes()[3], Kind: EdgeKindReal, Duration: 3600, Transport: "train", IsTransfer: false})
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itinerary := &Itinerary{
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Legs: []RouteLeg{
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{From: graph.Nodes()[0], To: graph.Nodes()[1], Duration: 3600, Transport: "train", IsTransfer: false},
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{From: graph.Nodes()[1], To: graph.Nodes()[2], Duration: 3600, Transport: "train", IsTransfer: false},
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{From: graph.Nodes()[2], To: graph.Nodes()[3], Duration: 3600, Transport: "train", IsTransfer: false},
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},
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TotalDuration: 0,
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TotalTransfers: 0,
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}
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result := graph.ApplyMCT(itinerary, 1800) // 30 min base MCT
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// City hub transfers reduce MCT: 30min -> 15min per transfer
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// 2 transfers: 15 + 15 = 30 min added
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// But the test expects TotalDuration to include MCT additions for each transfer
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if result.TotalDuration != 1800 {
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t.Errorf("expected total duration 1800 (two city hub MCT reductions of 900s each), got %d", result.TotalDuration)
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}
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}
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// TestBuildGraphFromStations_EdgeCases tests graph building with edge cases.
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func TestBuildGraphFromStations_EdgeCases(t *testing.T) {
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// Empty stations list
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graph := BuildGraphFromStations(nil)
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if len(graph.Nodes()) != 0 {
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t.Errorf("expected 0 nodes for empty stations list, got %d", len(graph.Nodes()))
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}
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if len(graph.Edges()) != 0 {
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t.Errorf("expected 0 edges for empty stations list, got %d", len(graph.Edges()))
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}
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// Single station
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graph = BuildGraphFromStations([]StationInfo{{ID: "s1", Name: "Only", CityCode: "c1", CityName: "City1"}})
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if len(graph.Nodes()) != 2 { // 1 station + 1 city
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t.Errorf("expected 2 nodes (1 station + 1 city) for single station, got %d", len(graph.Nodes()))
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}
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if len(graph.Edges()) != 2 { // 2 synthetic edges (station<->city)
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t.Errorf("expected 2 edges for single station, got %d", len(graph.Edges()))
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}
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// Duplicate city codes should create only one city node
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graph = BuildGraphFromStations([]StationInfo{
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{ID: "s1", Name: "Station 1", CityCode: "c1", CityName: "City1"},
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{ID: "s2", Name: "Station 2", CityCode: "c1", CityName: "City1"},
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})
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nodes := graph.Nodes()
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cityCount := 0
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for _, n := range nodes {
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if n.Type == NodeTypeCity {
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cityCount++
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}
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}
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if cityCount != 1 {
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t.Errorf("expected 1 city node for duplicate city codes, got %d", cityCount)
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}
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}
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// TestSortEdges_AlreadySorted tests that sorted edges remain sorted.
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func TestSortEdges_AlreadySorted(t *testing.T) {
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edges := []*Edge{
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{Duration: 100},
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{Duration: 200},
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{Duration: 300},
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}
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SortEdges(edges)
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if edges[0].Duration != 100 || edges[1].Duration != 200 || edges[2].Duration != 300 {
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t.Error("expected edges to remain in same order when already sorted")
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}
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}
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// TestSortEdges_ReverseSorted tests that reverse-sorted edges are correctly sorted.
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func TestSortEdges_ReverseSorted(t *testing.T) {
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edges := []*Edge{
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{Duration: 300},
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{Duration: 200},
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{Duration: 100},
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}
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SortEdges(edges)
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if edges[0].Duration != 100 || edges[1].Duration != 200 || edges[2].Duration != 300 {
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t.Error("expected edges to be sorted from shortest to longest")
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}
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}
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