| 1 | package anthropic |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "errors" |
| 6 | "io" |
| 7 | "net/http" |
| 8 | "strings" |
| 9 | "testing" |
| 10 | "time" |
| 11 | |
| 12 | "reasonix/internal/provider" |
| 13 | ) |
| 14 | |
| 15 | // Compatible Anthropic gateways often omit message_stop after message_delta |
| 16 | // the same way OpenAI-compatible gateways omit [DONE] after finish_reason. |
| 17 | // A stop_reason is the provider's commit signal; EOF after that must finalize. |
| 18 | |
| 19 | func TestReadStreamAcceptsStopReasonWithoutMessageStop(t *testing.T) { |
| 20 | sse := `event: message_start |
| 21 | data: {"type":"message_start","message":{"id":"msg_1","usage":{"input_tokens":5}}} |
| 22 | |
| 23 | event: content_block_delta |
| 24 | data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"hello"}} |
| 25 | |
| 26 | event: message_delta |
| 27 | data: {"type":"message_delta","delta":{"stop_reason":"end_turn"},"usage":{"output_tokens":1}} |
| 28 | ` |
| 29 | c := &client{name: "cc"} |
| 30 | resp := &http.Response{Body: io.NopCloser(strings.NewReader(sse))} |
| 31 | ch := make(chan provider.Chunk) |
| 32 | go c.readStream(context.Background(), resp, ch) |
| 33 | |
| 34 | var text strings.Builder |
| 35 | var sawDone, sawErr bool |
| 36 | var usage *provider.Usage |
| 37 | for ck := range ch { |
| 38 | switch ck.Type { |
| 39 | case provider.ChunkText: |
| 40 | text.WriteString(ck.Text) |
| 41 | case provider.ChunkUsage: |
| 42 | usage = ck.Usage |
| 43 | case provider.ChunkDone: |
| 44 | sawDone = true |
| 45 | case provider.ChunkError: |
| 46 | sawErr = true |
| 47 | t.Fatalf("stop_reason without message_stop should complete cleanly: %v", ck.Err) |
| 48 | } |
| 49 | } |
| 50 | if text.String() != "hello" || !sawDone || sawErr { |
| 51 | t.Fatalf("text=%q done=%v err=%v", text.String(), sawDone, sawErr) |
| 52 | } |
| 53 | if usage == nil || usage.FinishReason != "stop" { |
| 54 | t.Fatalf("usage = %+v, want finish_reason=stop", usage) |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | func TestReadStreamAcceptsToolUseStopReasonWithoutMessageStop(t *testing.T) { |
| 59 | sse := `event: message_start |
| 60 | data: {"type":"message_start","message":{"id":"msg_1","usage":{"input_tokens":10}}} |
| 61 | |
| 62 | event: content_block_start |
| 63 | data: {"type":"content_block_start","index":0,"content_block":{"type":"tool_use","id":"toolu_1","name":"bash"}} |
| 64 | |
| 65 | event: content_block_delta |
| 66 | data: {"type":"content_block_delta","index":0,"delta":{"type":"input_json_delta","partial_json":"{\"cmd\":\"ls\"}"}} |
| 67 | |
| 68 | event: content_block_stop |
| 69 | data: {"type":"content_block_stop","index":0} |
| 70 | |
| 71 | event: message_delta |
| 72 | data: {"type":"message_delta","delta":{"stop_reason":"tool_use"},"usage":{"output_tokens":8}} |
| 73 | ` |
| 74 | c := &client{name: "cc"} |
| 75 | resp := &http.Response{Body: io.NopCloser(strings.NewReader(sse))} |
| 76 | ch := make(chan provider.Chunk) |
| 77 | go c.readStream(context.Background(), resp, ch) |
| 78 | |
| 79 | var sawDone, sawErr bool |
| 80 | var call *provider.ToolCall |
| 81 | var usage *provider.Usage |
| 82 | for ck := range ch { |
| 83 | switch ck.Type { |
| 84 | case provider.ChunkToolCall: |
| 85 | call = ck.ToolCall |
| 86 | case provider.ChunkUsage: |
| 87 | usage = ck.Usage |
| 88 | case provider.ChunkDone: |
| 89 | sawDone = true |
| 90 | case provider.ChunkError: |
| 91 | sawErr = true |
| 92 | t.Fatalf("tool_use stop_reason without message_stop should complete: %v", ck.Err) |
| 93 | } |
| 94 | } |
| 95 | if sawErr || !sawDone { |
| 96 | t.Fatalf("done=%v err=%v", sawDone, sawErr) |
| 97 | } |
| 98 | if call == nil || call.ID != "toolu_1" || call.Name != "bash" || call.Arguments != `{"cmd":"ls"}` { |
| 99 | t.Fatalf("tool call = %+v", call) |
| 100 | } |
| 101 | if usage == nil || usage.FinishReason != "tool_calls" { |
| 102 | t.Fatalf("usage = %+v, want finish_reason=tool_calls", usage) |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | func TestStreamScanEndErrorClassifiesTerminal(t *testing.T) { |
| 107 | if err := streamScanEndError("cc", time.Second, false, nil, "end_turn"); err != nil { |
| 108 | t.Fatalf("stop_reason must commit: %v", err) |
| 109 | } |
| 110 | err := streamScanEndError("cc", time.Second, false, nil, "") |
| 111 | if !provider.IsStreamInterrupted(err) { |
| 112 | t.Fatalf("empty stop_reason = %v, want interrupt", err) |
| 113 | } |
| 114 | if !strings.Contains(err.Error(), "stream ended before message_stop") { |
| 115 | t.Fatalf("interrupt = %v", err) |
| 116 | } |
| 117 | if err := streamScanEndError("cc", time.Second, true, nil, ""); !provider.IsStreamInterrupted(err) || |
| 118 | provider.StreamInterruptReason(err) != provider.StreamInterruptIdleTimeout { |
| 119 | t.Fatalf("stall = %v", err) |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | func TestReadStreamStillInterruptsWithoutStopReasonOrMessageStop(t *testing.T) { |
| 124 | sse := `event: message_start |
| 125 | data: {"type":"message_start","message":{"id":"msg_1","usage":{"input_tokens":5}}} |
| 126 | |
| 127 | event: content_block_delta |
| 128 | data: {"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"partial"}} |
| 129 | ` |
| 130 | c := &client{name: "cc"} |
| 131 | resp := &http.Response{Body: io.NopCloser(strings.NewReader(sse))} |
| 132 | ch := make(chan provider.Chunk) |
| 133 | go c.readStream(context.Background(), resp, ch) |
| 134 | |
| 135 | var gotInterrupted, sawDone bool |
| 136 | for ck := range ch { |
| 137 | switch ck.Type { |
| 138 | case provider.ChunkDone: |
| 139 | sawDone = true |
| 140 | case provider.ChunkError: |
| 141 | var interrupted *provider.StreamInterruptedError |
| 142 | gotInterrupted = errors.As(ck.Err, &interrupted) |
| 143 | } |
| 144 | } |
| 145 | if sawDone { |
| 146 | t.Fatal("must not emit ChunkDone without message_stop or stop_reason") |
| 147 | } |
| 148 | if !gotInterrupted { |
| 149 | t.Fatal("EOF without stop_reason must stay StreamInterruptedError") |
| 150 | } |
| 151 | } |
| 152 |