github.com/apache/beam/sdks/v2@v2.48.2/python/apache_beam/testing/data/trigger_transcripts.yaml

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name: fixed_default
window_fn: FixedWindows(10)       # Python names/syntax, unless otherwise noted.
trigger_fn: Default               # Same. Empty () may be omitted.
transcript:                       # Ordered list of events.
  - input: [1, 2, 3, 10, 11]      # The elements are the timestamps.
  - watermark: 25
  - expect:                       # Every expected output from the last action.
      - {window: [0, 9], values: [1, 2, 3], index: 0}
      - {window: [10, 19], values: [10, 11]}   # Partial match on attributes OK.

---
name: fixed_default_late_data
window_fn: FixedWindows(10)
trigger_fn: Default
timestamp_combiner: OUTPUT_AT_EOW
allowed_lateness: 100
transcript:
  - input: [1, 2, 3, 10, 11, 25]
  - watermark: 100
  - expect:
      - {window: [0, 9], values: [1, 2, 3], timestamp: 9, final: false}
      - {window: [10, 19], values: [10, 11], timestamp: 19}
      - {window: [20, 29], values: [25], timestamp: 29, late: false}
  - input: [7]
  - expect:
      - {window: [0, 9], values: [1, 2, 3, 7], timestamp: 9, late: true}

---
name: fixed_drop_late_data_after_allowed_lateness
window_fn: FixedWindows(10)
trigger_fn: AfterWatermark(early=AfterCount(3), late=AfterCount(1))
timestamp_combiner: OUTPUT_AT_EOW
allowed_lateness: 20
accumulation_mode: accumulating
transcript:
  - input: [1, 2, 10, 11, 80, 81]
  - watermark: 100
  - expect:
      - {window: [0, 9], values: [1, 2], timestamp: 9}
      - {window: [10, 19], values: [10, 11], timestamp: 19}
      - {window: [80, 89], values: [80, 81], timestamp: 89, late: false}
  - input: [7, 8] # no output
  - input: [17, 18] # no output
  - input: [82]
  - expect:
      - {window: [80, 89], values: [80, 81, 82], timestamp: 89, late: true}

---
name: timestamp_combiner_earliest
window_fn: FixedWindows(10)
trigger_fn: Default
timestamp_combiner: OUTPUT_AT_EARLIEST
transcript:
  - input: [1, 2, 3, 10, 11, 25]
  - watermark: 100
  - expect:
      - {window: [0, 9], values: [1, 2, 3], timestamp: 1}
      - {window: [10, 19], values: [10, 11], timestamp: 10}
      - {window: [20, 29], values: [25], timestamp: 25, late: false}

---
name: timestamp_combiner_latest
window_fn: FixedWindows(10)
trigger_fn: Default
timestamp_combiner: OUTPUT_AT_LATEST
transcript:
  - input: [1, 2, 3, 10, 11, 25]
  - watermark: 100
  - expect:
      - {window: [0, 9], values: [1, 2, 3], timestamp: 3}
      - {window: [10, 19], values: [10, 11], timestamp: 11}
      - {window: [20, 29], values: [25], timestamp: 25, late: false}

---
# Test that custom timestamping is not invoked.
name: timestamp_combiner_custom_timestamping_eow
window_fn: CustomTimestampingFixedWindowsWindowFn(10)
trigger_fn: Default
timestamp_combiner: OUTPUT_AT_EOW
transcript:
  - input: [1, 2, 3, 10, 11, 25]
  - watermark: 100
  - expect:
      - {window: [0, 9], values: [1, 2, 3], timestamp: 9}
      - {window: [10, 19], values: [10, 11], timestamp: 19}
      - {window: [20, 29], values: [25], timestamp: 29, late: false}

---
# Test that custom timestamping is not invoked.
name: timestamp_combiner_custom_timestamping_earliest
window_fn: CustomTimestampingFixedWindowsWindowFn(10)
trigger_fn: Default
timestamp_combiner: OUTPUT_AT_EARLIEST
transcript:
  - input: [1, 2, 3, 10, 11, 25]
  - watermark: 100
  - expect:
      - {window: [0, 9], values: [1, 2, 3], timestamp: 1}
      - {window: [10, 19], values: [10, 11], timestamp: 10}
      - {window: [20, 29], values: [25], timestamp: 25, late: false}

---
# Test that custom timestamping is in fact invoked.
name: timestamp_combiner_custom_timestamping_earliest
broken_on:
  - SwitchingDirectRunner  # unsupported OUTPUT_AT_EARLIEST_TRANSFORMED
window_fn: CustomTimestampingFixedWindowsWindowFn(10)
trigger_fn: Default
timestamp_combiner: OUTPUT_AT_EARLIEST_TRANSFORMED
transcript:
  - input: [1, 2, 3, 10, 11, 25]
  - watermark: 100
  - expect:
      - {window: [0, 9], values: [1, 2, 3], timestamp: 101}
      - {window: [10, 19], values: [10, 11], timestamp: 110}
      - {window: [20, 29], values: [25], timestamp: 125, late: false}

---
name: early_late_sessions
broken_on:
  # Watermark regresses, causing what should be late data to not be late.
  - SwitchingDirectRunner
window_fn: Sessions(10)
trigger_fn: AfterWatermark(early=AfterCount(2), late=AfterCount(3))
allowed_lateness: 100
timestamp_combiner: OUTPUT_AT_EOW
transcript:
    - input: [1, 2]
    - expect:
        - {window: [1, 11], values: [1, 2], timestamp: 11, early: true, index: 0}
    - input: [3]    # no output
    - input: [4]
    - expect:
        - {window: [1, 13], values: [1, 2, 3, 4], timestamp: 13, early: true, index: 0}
    - input: [5]
    - watermark: 100
    - expect:
        - {window: [1, 14], values:[1, 2, 3, 4, 5], timestamp: 14,
           index: 0, nonspeculative_index: 0}
    - input: [1]
    - input: [3, 4]
    - expect:
        - {window: [1, 14], values: [1, 1, 2, 3, 3, 4, 4, 5], timestamp: 14,
           final: false, index: 1, nonspeculative_index: 1}

---
name: discarding_early_fixed
window_fn: FixedWindows(10)
trigger_fn: AfterWatermark(early=AfterCount(2))
timestamp_combiner: OUTPUT_AT_EOW
accumulation_mode: discarding
transcript:
- input: [1, 2]
- expect:
  - {window: [0, 9], values: [1, 2], timestamp: 9, early: true, index: 0}
- input: [4]    # no output
- input: [14]   # no output
- input: [5]
- expect:
  - {window: [0, 9], values: [4, 5], timestamp: 9, early: true, index: 1}
- input: [18]
- expect:
  - {window: [10, 19], values: [14, 18], timestamp: 19, early: true, index: 0}
- input: [6]
- watermark: 100
- expect:
  - {window: [0, 9], values: [6], timestamp: 9, early: false, late: false,
     final: true, index: 2, nonspeculative_index: 0}
  - {window: [10, 19], values: [], timestamp: 19, early: false, late: false,
     final: true, index: 1, nonspeculative_index: 0}

---
name: garbage_collection
broken_on:
  - SwitchingDirectRunner  # claims pipeline stall
window_fn: FixedWindows(10)
trigger_fn: AfterCount(2)
timestamp_combiner: OUTPUT_AT_EOW
allowed_lateness: 10
accumulation_mode: discarding
transcript:
  - input: [1, 2, 3, 10, 11, 25]
  - expect:
      - {window: [0, 9], timestamp: 9}
      - {window: [10, 19], timestamp: 19}
  - state:
      present: [[20, 29]]
      absent: [[0, 9]]
      tombstone: [[10, 19]]

---
name: known_late_data_watermark
broken_on:
  - SwitchingDirectRunner  # bad timestamp
window_fn: FixedWindows(10)
trigger_fn: Default
timestamp_combiner: OUTPUT_AT_EARLIEST
transcript:
  - watermark: 5
  - input: [2, 3, 7, 8]
  - watermark: 11
  - expect:
      - {window: [0, 9], values: [2, 3, 7, 8], timestamp: 7}

---
name: known_late_data_no_watermark_hold_possible
broken_on:
  - SwitchingDirectRunner  # bad timestamp
window_fn: FixedWindows(10)
trigger_fn: Default
timestamp_combiner: OUTPUT_AT_EARLIEST
transcript:
  - watermark: 8
  - input: [2, 3, 7]
  - watermark: 11
  - expect:
      - {window: [0, 9], values: [2, 3, 7], timestamp: 9}

# These next examples test that bad/incomplete transcripts are rejected.
---
name: bad_output
error: Unmatched output
windowfn: FixedWindows(10)
transcript:
  - input: [1, 2, 3]
  - expect:
      - {window: [0, 9], values: [1, 2, 3]}  # bad
  - watermark: 100

---
name: bad_expected_values
error: Unmatched output
window_fn: FixedWindows(10)
transcript:
  - input: [1, 2, 3]
  - watermark: 100
  - expect:
      - {window: [0, 9], values: [1, 2]}  # bad values

---
name: bad_expected_window
error: Unmatched output
window_fn: FixedWindows(10)
transcript:
  - input: [1, 2, 3]
  - watermark: 100
  - expect:
      - {window: [0, 19], values: [1, 2, 3]}  # bad window

---
name: missing_output
error: Unexpected output
window_fn: FixedWindows(10)
transcript:
   - input: [1, 2, 3]
   - watermark: 100
   # missing output
   - watermark: 200

---
name: missing_output_at_end
error: Unexpected output
window_fn: FixedWindows(10)
transcript:
   - input: [1, 2, 3]
   - watermark: 100
   # missing output