| 1 | package agent |
| 2 | |
| 3 | import ( |
| 4 | "strings" |
| 5 | "testing" |
| 6 | |
| 7 | "reasonix/internal/provider" |
| 8 | ) |
| 9 | |
| 10 | // partitionCoversRegion is the invariant that makes a lost user turn impossible: |
| 11 | // every provider-visible message in the region lands in exactly one group. |
| 12 | func partitionCoversRegion(t *testing.T, a *Agent, region []provider.Message) (kept, fold []provider.Message) { |
| 13 | t.Helper() |
| 14 | kept, fold, retention := a.partitionFoldForProjection(region) |
| 15 | userTurns := 0 |
| 16 | for _, m := range region { |
| 17 | if m.Role == provider.RoleUser && !m.LocalOnly && !isCompactionSummary(m) { |
| 18 | userTurns++ |
| 19 | } |
| 20 | } |
| 21 | if got := retention.Kept + retention.Dropped; got != userTurns { |
| 22 | t.Errorf("retention accounts for %d user turns, region has %d", got, userTurns) |
| 23 | } |
| 24 | seen := map[string]int{} |
| 25 | for _, group := range [][]provider.Message{kept, fold} { |
| 26 | for _, m := range group { |
| 27 | seen[m.Content]++ |
| 28 | } |
| 29 | } |
| 30 | for _, m := range region { |
| 31 | if m.LocalOnly { |
| 32 | if seen[m.Content] != 0 { |
| 33 | t.Errorf("display-only message %q reached the projection", m.Content) |
| 34 | } |
| 35 | continue |
| 36 | } |
| 37 | switch seen[m.Content] { |
| 38 | case 1: |
| 39 | case 0: |
| 40 | t.Errorf("message %q is in no group — it would vanish from the projection", m.Content) |
| 41 | default: |
| 42 | t.Errorf("message %q is in %d groups — it would be duplicated", m.Content, seen[m.Content]) |
| 43 | } |
| 44 | } |
| 45 | return kept, fold |
| 46 | } |
| 47 | |
| 48 | func TestPartitionFoldsSmallUserTurns(t *testing.T) { |
| 49 | a := &Agent{} |
| 50 | region := []provider.Message{ |
| 51 | {Role: provider.RoleUser, Content: "small turn 0"}, |
| 52 | {Role: provider.RoleUser, Content: "small turn 1"}, |
| 53 | {Role: provider.RoleUser, Content: "small turn 2"}, |
| 54 | {Role: provider.RoleAssistant, Content: "work"}, |
| 55 | } |
| 56 | kept, fold := partitionCoversRegion(t, a, region) |
| 57 | if len(kept) != 0 || len(fold) != 4 { |
| 58 | t.Fatalf("kept=%d fold=%d, want 0/4", len(kept), len(fold)) |
| 59 | } |
| 60 | if got := renderTranscript(fold); !strings.Contains(got, "small turn") { |
| 61 | t.Fatalf("old user turns must reach the summarizer: %s", got) |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | func TestPartitionFoldsLargeUserTurns(t *testing.T) { |
| 66 | a := &Agent{} |
| 67 | oversize := provider.Message{ |
| 68 | Role: provider.RoleUser, |
| 69 | Content: strings.Repeat("y", 12_000), |
| 70 | } |
| 71 | region := []provider.Message{ |
| 72 | {Role: provider.RoleUser, Content: "small and kept"}, |
| 73 | oversize, |
| 74 | } |
| 75 | kept, fold := partitionCoversRegion(t, a, region) |
| 76 | if len(kept) != 0 || len(fold) != 2 { |
| 77 | t.Fatalf("kept=%d fold=%d, want both turns folded", len(kept), len(fold)) |
| 78 | } |
| 79 | if !strings.Contains(renderTranscript(fold), "small and kept") { |
| 80 | t.Fatal("the small turn should be summarized with the oversize one") |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | func TestPartitionMergesUserTurnsAcrossPriorDigest(t *testing.T) { |
| 85 | a := &Agent{} |
| 86 | region := []provider.Message{ |
| 87 | {Role: provider.RoleUser, Content: "constraint from before the digest"}, |
| 88 | {Role: provider.RoleUser, Content: summaryTagOpen + "\nprior digest\n" + summaryTagClose}, |
| 89 | {Role: provider.RoleAssistant, Content: "work"}, |
| 90 | } |
| 91 | kept, fold := partitionCoversRegion(t, a, region) |
| 92 | if len(kept) != 0 || !strings.Contains(renderTranscript(fold), "constraint from before") { |
| 93 | t.Fatalf("pre-digest user turn must enter the merged summary; fold=%v", renderTranscript(fold)) |
| 94 | } |
| 95 | if !strings.Contains(renderTranscript(fold), "prior digest") { |
| 96 | t.Fatal("the digest itself must still fold into the next one") |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | func TestPartitionFoldsPriorDigests(t *testing.T) { |
| 101 | // Any digest in the region is merged into the next one, so the model |
| 102 | // never sees a chain of digests. |
| 103 | a := &Agent{} |
| 104 | region := []provider.Message{ |
| 105 | {Role: provider.RoleUser, Content: summaryTagOpen + "\nolder digest\n" + summaryTagClose}, |
| 106 | {Role: provider.RoleUser, Content: summaryTagOpen + "\nnewer digest\n" + summaryTagClose}, |
| 107 | {Role: provider.RoleAssistant, Content: "work"}, |
| 108 | } |
| 109 | kept, fold := partitionCoversRegion(t, a, region) |
| 110 | if len(kept) != 0 || len(fold) != 3 { |
| 111 | t.Fatalf("kept=%d fold=%d, want every digest folded", len(kept), len(fold)) |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | func TestPartitionIgnoresDeprecatedKeepPolicy(t *testing.T) { |
| 116 | a := &Agent{keepPolicy: KeepErrors} |
| 117 | region := []provider.Message{ |
| 118 | {Role: provider.RoleAssistant, Content: "unrelated prose"}, |
| 119 | {Role: provider.RoleAssistant, Content: "call", ToolCalls: []provider.ToolCall{{ID: "t1", Name: "bash"}}}, |
| 120 | {Role: provider.RoleTool, ToolCallID: "t1", Name: "bash", Content: "error: boom"}, |
| 121 | } |
| 122 | kept, fold := partitionCoversRegion(t, a, region) |
| 123 | if len(kept) != 0 || len(fold) != 3 { |
| 124 | t.Fatalf("kept=%d fold=%d, want every old message folded", len(kept), len(fold)) |
| 125 | } |
| 126 | if got := renderTranscript(fold); !strings.Contains(got, "error: boom") || !strings.Contains(got, "call") { |
| 127 | t.Fatalf("the failing call and its result must enter the summary together: %s", got) |
| 128 | } |
| 129 | } |
| 130 |