Add tests

.gitignore

@@ -7,3 +7,8 @@ build
 dist
 fatamorgana.egg-info
 docs
+
+*.gds
+*.gds.gz
+*.oas
+*.oas.gz

fatamorgana/test/__init__.py

@@ -0,0 +1,7 @@
+"""
+Tests (run with `python3 -m pytest -rxPXs | tee results.txt`)
+
+
+  The test_files_* modules are meant to mimic the test cases used by KLayout,
+in order to provide a secondary validation mechanism.
+"""

fatamorgana/test/build_testfiles.py

@@ -0,0 +1,96 @@
+'''
+Build files equivalent to the test cases used by KLayout.
+'''
+# type: ignore
+
+from typing import Callable
+from io import BufferedIOBase
+
+
+from . import (
+    test_files_properties, test_files_cblocks, test_files_layernames,
+    test_files_circles, test_files_ctrapezoids, test_files_trapezoids,
+    test_files_placements, test_files_paths, test_files_modals,
+    test_files_polygons, test_files_rectangles, test_files_empty,
+    test_files_texts, test_files_cells)
+
+
+def build_file(num: str, func: Callable[[BufferedIOBase], BufferedIOBase]) -> None:
+    with open('t' + num + '.oas', 'wb') as f:
+        func(f)
+
+
+def write_all_files() -> None:
+    build_file('1.1', test_files_empty.write_file_1)
+    build_file('1.2', test_files_empty.write_file_2)
+    build_file('1.3', test_files_empty.write_file_3)
+    build_file('1.4', test_files_empty.write_file_4)
+    build_file('1.5', test_files_empty.write_file_5)
+
+    build_file('2.1', test_files_cells.write_file_1)
+    build_file('2.2', test_files_cells.write_file_2)
+    build_file('2.3', test_files_cells.write_file_3)
+    build_file('2.4', test_files_cells.write_file_4)
+    build_file('2.5', test_files_cells.write_file_5)
+    build_file('2.6', test_files_cells.write_file_6)
+    build_file('2.7', test_files_cells.write_file_7)
+
+    build_file('3.1', lambda f: test_files_texts.write_file_common(f, 1))
+    build_file('3.2', lambda f: test_files_texts.write_file_common(f, 2))
+    build_file('3.3', test_files_texts.write_file_3)
+    build_file('3.4', test_files_texts.write_file_4)
+    build_file('3.5', lambda f: test_files_texts.write_file_common(f, 5))
+    build_file('3.6', test_files_texts.write_file_6)
+    build_file('3.7', test_files_texts.write_file_7)
+    build_file('3.8', test_files_texts.write_file_8)
+    build_file('3.9', test_files_texts.write_file_9)
+    build_file('3.10', test_files_texts.write_file_10)
+    build_file('3.11', test_files_texts.write_file_11)
+
+    build_file('4.1', lambda f: test_files_rectangles.write_file_common(f, 1))
+    build_file('4.2', lambda f: test_files_rectangles.write_file_common(f, 2))
+
+    build_file('5.1', lambda f: test_files_polygons.write_file_common(f, 1))
+    build_file('5.2', test_files_polygons.write_file_2)
+    build_file('5.3', lambda f: test_files_polygons.write_file_common(f, 3))
+
+    build_file('6.1', test_files_paths.write_file_1)
+
+    build_file('7.1', test_files_trapezoids.write_file_1)
+
+    build_file('8.1', test_files_placements.write_file_1)
+    build_file('8.2', lambda f: test_files_placements.write_file_common(f, 2))
+    build_file('8.3', lambda f: test_files_placements.write_file_common(f, 3))
+    build_file('8.4', test_files_placements.write_file_4)
+    build_file('8.5', lambda f: test_files_placements.write_file_common(f, 5))
+    build_file('8.6', test_files_placements.write_file_6)
+    build_file('8.7', lambda f: test_files_placements.write_file_common(f, 7))
+    build_file('8.8', test_files_placements.write_file_8)
+
+    build_file('9.1', test_files_ctrapezoids.write_file_1)
+    build_file('9.2', test_files_ctrapezoids.write_file_2)
+
+    build_file('10.1', test_files_modals.write_file_1)
+
+    build_file('11.1', lambda f: test_files_properties.write_file_common(f, 1))
+    build_file('11.2', lambda f: test_files_properties.write_file_common(f, 2))
+    build_file('11.3', test_files_properties.write_file_3)
+    build_file('11.4', lambda f: test_files_properties.write_file_4_6(f, 4))
+    build_file('11.5', lambda f: test_files_properties.write_file_common(f, 5))
+    build_file('11.6', lambda f: test_files_properties.write_file_4_6(f, 6))
+    build_file('11.7', lambda f: test_files_properties.write_file_7_8_9(f, 7))
+    build_file('11.8', lambda f: test_files_properties.write_file_7_8_9(f, 8))
+    build_file('11.9', lambda f: test_files_properties.write_file_7_8_9(f, 9))
+
+    build_file('12.1', test_files_circles.write_file_1)
+
+    build_file('13.1', test_files_layernames.write_file_1)
+    build_file('13.2', test_files_layernames.write_file_2)
+    build_file('13.3', test_files_layernames.write_file_3)
+    build_file('13.4', test_files_layernames.write_file_4)
+
+    build_file('14.1', test_files_cblocks.write_file_1)
+
+
+if __name__ == '__main__':
+    write_all_files()

fatamorgana/test/test_files_cblocks.py

@@ -0,0 +1,183 @@
+# type: ignore
+
+from typing import List, Tuple, Iterable
+from itertools import chain
+from io import BytesIO, BufferedIOBase
+import struct
+
+import pytest       # type: ignore
+import numpy
+from numpy.testing import assert_equal
+
+from .utils import HEADER, FOOTER
+from ..basic import write_uint, write_sint, read_uint, read_sint, write_bstring, write_byte, PathExtensionScheme
+from ..basic import InvalidRecordError, InvalidDataError
+from ..main import OasisLayout
+
+
+def base_tests(layout: OasisLayout) -> None:
+    assert layout.version.string == '1.0'
+    assert layout.unit == 1000
+    assert layout.validation.checksum_type == 0
+
+    assert not layout.properties
+    assert not layout.propnames
+    assert not layout.xnames
+    assert not layout.textstrings
+    assert not layout.cellnames
+    assert not layout.layers
+
+    assert len(layout.cells) == 1
+    assert layout.cells[0].name.string == 'ABCDH'
+    assert not layout.cells[0].properties
+
+
+def write_file_1(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    '''
+    buf.write(HEADER)
+
+    write_uint(buf, 14)          # CELL record (explicit)
+    write_bstring(buf, b'ABCDH')   # Cell name
+
+    cblock_data = bytes.fromhex('''
+        22 00 b0 02 b2 02 13
+        a9 66 60 98 c3 32 89 e5 0e e3 1b 61 91 4a c6 15
+        ac 8f 58 3a f8 be f0 8a 5a b0 30 57 5f 64 6d e4
+        4f bd c8 7a 87 ed 81 f8 02 79 a0 88 68 f5 42 b6
+        4e be 80 99 4c 3b 99 35 97 30 4f 14 d7 3c 14 f4
+        52 50 e4 24 e3 0b f6 9b c2 1a 9a 27 18 57 4b 8a
+        04 ae 65 3f 12 04 24 36 0b 8b 2c f2 e9 14 16 3d
+        c6 73 92 4d 64 21 e3 0b 9e cf 9a 15 4f 59 6f 08
+        83 cc 5d c8 f8 91 7b 25 7f ea 4e e6 03 3c 5b a4
+        66 88 01 85 d8 37 b2 fc 64 bd c8 25 5a 79 92 b1
+        99 4b a3 93 65 26 7b 33 bf e6 69 b6 39 7c a9 4b
+        40 2e e1 3b 28 a6 79 82 69 41 98 f6 14 ae 60 9b
+        d7 4c a2 9a 3d 8c 37 f9 6c 03 3f 32 b6 68 2c 64
+        5c cb f3 9a 49 f3 33 e3 0c a6 dd da 29 2f 98 76
+        80 d4 73 df 64 f9 cb b3 58 33 60 36 d3 13 d6 9b
+        9c b6 9a 3b 98 5f b2 07 2e 64 dc c9 7c 91 4b 24
+        f8 08 cb 6e 45 8d 47 32 1d 12 77 b8 81 4a 59 17
+        68 6a 1f 60 df 28 ac a9 3d 85 b5 5b b6 62 0a ff
+        0c 69 90 7b 36 b3 6c 65 d3 9c c9 f4 40 b1 93 a5
+        47 e0 32 7f 8a e6 54 d6 93 6c a2 0f 14 17 c8 03
+        00''')
+    for byte in cblock_data:
+        write_byte(buf, byte)
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_1() -> None:
+    buf = write_file_1(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+
+    geometry = layout.cells[0].geometry
+    assert len(geometry) == 10
+
+    for ii, gg in enumerate(geometry):
+        msg = f'Failed on geometry {ii}'
+        assert gg.x == [110, 900, 1520, -370, 1690, -50, 180, 1540, 970, 2160][ii], msg
+        assert gg.y == [1270, 890, 2000, 1260, 1420, 850, 860, 750, 1740, 2000][ii], msg
+        if ii == 0:
+            assert gg.layer == 0, msg
+        else:
+            assert gg.layer == 1, msg
+        assert gg.datatype == 0, msg
+
+        assert not gg.properties, msg
+        assert gg.repetition is None, msg
+
+    assert geometry[0].height == 530
+    assert geometry[0].width == 540
+    assert geometry[1].height == 610
+    assert geometry[1].width == 680
+
+    assert_equal(geometry[2].point_list,
+        [[-30, -360], [480, -50], [180, 430], [-630, -20]])
+
+    assert_equal(geometry[3].point_list,
+        [[-30, -400],
+         [450, 40],
+         [70, -220],
+         [10, 210],
+         [740, -20],
+         [0, 660],
+         [570, 10],
+         [50, 500],
+         [630, 20],
+         [10, 100],
+         [-810, 10],
+         [20, -470],
+         [-660, 0],
+         [20, -470],
+         [-620, 10],
+         [0, 610],
+         [610, -10],
+         [0, -100],
+         [210, 10],
+         [40, 820],
+         [-1340, 60],
+         [30, -1370]])
+
+    assert_equal(geometry[4].point_list,
+        [[40, -760], [490, -50], [110, 800], [-640, 10]])
+
+    assert_equal(geometry[5].point_list,
+        [[140, -380],
+         [340, -10],
+         [30, -100],
+         [-320, 20],
+         [130, -460],
+         [-480, -20],
+         [-210, 910],
+         [370, 40]])
+
+    assert_equal(geometry[6].point_list,
+        [[720, -20],
+         [20, 20],
+         [690, 0],
+         [-10, 650],
+         [-20, 30],
+         [-90, -10],
+         [10, 70],
+         [470, -30],
+         [20, -120],
+         [-320, 0],
+         [40, -790],
+         [-90, -20],
+         [-60, 140],
+         [-1390, 50],
+         [10, 30]])
+
+    assert_equal(geometry[7].point_list,
+        [[150, -830],
+         [-1320, 40],
+         [-70, 370],
+         [310, -30],
+         [10, 220],
+         [250, -40],
+         [40, -220],
+         [340, 10],
+         [-20, 290],
+         [-1070, 20],
+         [0, 230],
+         [1380, -60]])
+
+    assert_equal(geometry[8].point_list,
+        [[330, 0], [-10, 480], [620, -20], [-10, 330], [-930, 60], [0, -850]])
+
+    assert_equal(geometry[9].point_list,
+        [[-140, -410],
+         [10, -140],
+         [270, 0],
+         [130, 1030],
+         [-500, 50],
+         [10, -330],
+         [210, -10],
+         [10, -190]])

fatamorgana/test/test_files_cells.py

@@ -0,0 +1,275 @@
+# type: ignore
+
+from typing import List, Tuple, Iterable
+from itertools import chain
+from io import BytesIO, BufferedIOBase
+import struct
+
+import pytest       # type: ignore
+
+from .utils import HEADER, FOOTER
+from ..basic import write_uint, write_sint, read_uint, read_sint, write_bstring
+from ..basic import InvalidRecordError, InvalidDataError
+from ..main import OasisLayout
+
+
+def base_tests(layout: OasisLayout) -> None:
+    assert layout.version.string == '1.0'
+    assert layout.unit == 1000
+    assert layout.validation.checksum_type == 0
+
+    assert not layout.properties
+    assert not layout.propnames
+    assert not layout.xnames
+    assert not layout.textstrings
+    assert not layout.propstrings
+    assert not layout.layers
+
+
+def write_file_1(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    Single cell with explicit name 'XYZ'
+    '''
+    buf.write(HEADER)
+
+    write_uint(buf, 14)          # CELL record (explicit)
+    write_bstring(buf, b'XYZ')   # Cell name
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_1() -> None:
+    buf = write_file_1(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+    assert len(layout.cells) == 1
+    assert layout.cells[0].name.string == 'XYZ'
+    assert not layout.cellnames
+
+
+def write_file_2(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    Two cellnames ('XYZ', 'ABC') and two cells with name references.
+    '''
+    buf.write(HEADER)
+
+    write_uint(buf, 3)           # CELLNAME record (implicit id 0)
+    write_bstring(buf, b'XYZ')
+
+    write_uint(buf, 3)           # CELLNAME record (implicit id 1)
+    write_bstring(buf, b'ABC')
+
+    write_uint(buf, 13)          # CELL record (name ref.)
+    write_uint(buf, 0)           # Cell name 0 (XYZ)
+
+    write_uint(buf, 13)          # CELL record (name ref.)
+    write_uint(buf, 1)           # Cell name 1 (ABC)
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_2() -> None:
+    buf = write_file_2(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+    assert len(layout.cellnames) == 2
+    assert len(layout.cells) == 2
+    assert layout.cellnames[0].nstring.string == 'XYZ'
+    assert layout.cellnames[1].nstring.string == 'ABC'
+    assert layout.cells[0].name == 0
+    assert layout.cells[1].name == 1
+
+
+def write_file_3(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    Invalid file, contains a mix of explicit and implicit cellnames
+    '''
+    buf.write(HEADER)
+
+    write_uint(buf, 4)           # CELLNAME record (explicit id)
+    write_bstring(buf, b'ABC')
+    write_uint(buf, 1)           # id 1
+
+    write_uint(buf, 3)           # CELLNAME record (implicit id 0) -- Expect failure due to mix of explicit/implicit ids
+    write_bstring(buf, b'XYZ')
+
+    write_uint(buf, 13)          # CELL record (name ref.)
+    write_uint(buf, 0)           # Cell name 0 (XYZ)
+
+    write_uint(buf, 13)          # CELL record (name ref.)
+    write_uint(buf, 1)           # Cell name 1 (ABC)
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_3() -> None:
+    buf = write_file_3(BytesIO())
+
+    buf.seek(0)
+    with pytest.raises(InvalidRecordError):
+        layout = OasisLayout.read(buf)
+
+
+def write_file_4(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    Two cells referencing two names with explicit ids (unsorted)
+    '''
+    buf.write(HEADER)
+
+    write_uint(buf, 4)           # CELLNAME record (explicit id)
+    write_bstring(buf, b'ABC')
+    write_uint(buf, 1)           # id 1
+
+    write_uint(buf, 4)           # CELLNAME record (explicit id)
+    write_bstring(buf, b'XYZ')
+    write_uint(buf, 0)           # id 0
+
+    write_uint(buf, 13)          # CELL record (name ref.)
+    write_uint(buf, 0)           # Cell name 0 (XYZ)
+
+    write_uint(buf, 13)          # CELL record (name ref.)
+    write_uint(buf, 1)           # Cell name 1 (ABC)
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_4() -> None:
+    buf = write_file_4(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+    assert len(layout.cellnames) == 2
+    assert len(layout.cells) == 2
+    assert layout.cellnames[0].nstring.string == 'XYZ'
+    assert layout.cellnames[1].nstring.string == 'ABC'
+    assert layout.cells[0].name == 0
+    assert layout.cells[1].name == 1
+
+
+def write_file_5(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    Reference to non-existent cell name.
+    '''
+    buf.write(HEADER)
+
+    write_uint(buf, 4)           # CELLNAME record (explicit id)
+    write_bstring(buf, b'ABC')
+    write_uint(buf, 1)           # id 1
+
+    write_uint(buf, 4)           # CELLNAME record (explicit id)
+    write_bstring(buf, b'XYZ')
+    write_uint(buf, 0)           # id 0
+
+    write_uint(buf, 13)          # CELL record (name ref.)
+    write_uint(buf, 0)           # Cell name 0 (XYZ)
+
+    write_uint(buf, 13)          # CELL record (name ref.)
+    write_uint(buf, 2)           # Cell name 2 -- Reference to non-existent CELLNAME!!!
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_5() -> None:
+    buf = write_file_5(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+    assert len(layout.cellnames) == 2
+    assert len(layout.cells) == 2
+    assert layout.cellnames[0].nstring.string == 'XYZ'
+    assert layout.cellnames[1].nstring.string == 'ABC'
+    assert layout.cells[0].name == 0
+    assert layout.cells[1].name == 2
+
+    #TODO add optional error checking for this case
+
+
+def write_file_6(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    Cellname with invalid n-string.
+    '''
+    buf.write(HEADER)
+
+    write_uint(buf, 4)           # CELLNAME record (explicit id)
+    write_bstring(buf, b'ABC')
+    write_uint(buf, 1)           # id 1
+
+    write_uint(buf, 4)           # CELLNAME record (explicit id)
+    write_bstring(buf, b' XYZ')
+    write_uint(buf, 0)           # id 0
+
+    write_uint(buf, 13)          # CELL record (name ref.)
+    write_uint(buf, 0)           # Cell name 0 (XYZ)
+
+    write_uint(buf, 13)          # CELL record (name ref.)
+    write_uint(buf, 1)           # Cell name 1
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_6() -> None:
+    buf = write_file_6(BytesIO())
+
+    buf.seek(0)
+
+    with pytest.raises(InvalidDataError):
+        layout = OasisLayout.read(buf)
+
+    #base_tests(layout)
+    #assert len(layout.cellnames) == 2
+    #assert len(layout.cells) == 2
+    #assert layout.cellnames[0].nstring.string == ' XYZ'
+    #assert layout.cellnames[1].nstring.string == 'ABC'
+    #assert layout.cells[0].name == 0
+    #assert layout.cells[1].name == 1
+
+
+def write_file_7(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    Unused cellname.
+    '''
+    buf.write(HEADER)
+
+    write_uint(buf, 4)           # CELLNAME record (explicit id)
+    write_bstring(buf, b'ABC')
+    write_uint(buf, 1)           # id 1
+
+    write_uint(buf, 4)           # CELLNAME record (explicit id)
+    write_bstring(buf, b'XYZ')
+    write_uint(buf, 0)           # id 0
+
+    write_uint(buf, 13)          # CELL record (name ref.)
+    write_uint(buf, 0)           # Cell name 0 (XYZ)
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_7() -> None:
+    buf = write_file_7(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+    assert len(layout.cellnames) == 2
+    assert len(layout.cells) == 1
+    assert layout.cellnames[0].nstring.string == 'XYZ'
+    assert layout.cellnames[1].nstring.string == 'ABC'
+    assert layout.cells[0].name == 0

fatamorgana/test/test_files_circles.py

@@ -0,0 +1,117 @@
+# type: ignore
+
+from typing import List, Tuple, Iterable
+from itertools import chain
+from io import BytesIO, BufferedIOBase
+import struct
+
+import pytest       # type: ignore
+import numpy
+from numpy.testing import assert_equal
+
+from .utils import HEADER, FOOTER
+from ..basic import write_uint, write_sint, read_uint, read_sint, write_bstring, write_byte, PathExtensionScheme
+from ..basic import InvalidRecordError, InvalidDataError
+from ..main import OasisLayout
+
+
+def base_tests(layout: OasisLayout) -> None:
+    assert layout.version.string == '1.0'
+    assert layout.unit == 1000
+    assert layout.validation.checksum_type == 0
+
+    assert not layout.properties
+    assert not layout.propnames
+    assert not layout.xnames
+    assert not layout.textstrings
+    assert not layout.cellnames
+    assert not layout.layers
+
+    assert len(layout.cells) == 1
+    assert layout.cells[0].name.string == 'A'
+    assert not layout.cells[0].properties
+
+
+def write_file_1(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    '''
+    buf.write(HEADER)
+
+    write_uint(buf, 14)          # CELL record (explicit)
+    write_bstring(buf, b'A')     # Cell name
+
+    write_uint(buf, 27)          # CIRCLE record
+    write_byte(buf, 0b0011_1011) # 00rX_YRDL
+    write_uint(buf, 1)           # layer
+    write_uint(buf, 2)           # datatype
+    write_uint(buf, 150)         # radius
+    write_sint(buf, -100)        # geometry-x (absolute)
+    write_sint(buf, 200)         # geometry-y (absolute)
+
+    write_uint(buf, 16)          # XYRELATIVE record
+
+    write_uint(buf, 27)          # CIRCLE record
+    write_byte(buf, 0b0000_1000) # 00rX_YRDL
+    write_sint(buf, 400)         # geometry-y (relative)
+
+    write_uint(buf, 27)          # CIRCLE record
+    write_byte(buf, 0b0010_1000) # 00rX_YRDL
+    write_uint(buf, 0)           # radius
+    write_sint(buf, 400)         # geometry-y (relative)
+
+    write_uint(buf, 27)          # CIRCLE record
+    write_byte(buf, 0b0010_1000) # 00rX_YRDL
+    write_uint(buf, 1)           # radius
+    write_sint(buf, 400)         # geometry-y (relative)
+
+    write_uint(buf, 27)          # CIRCLE record
+    write_byte(buf, 0b0010_1000) # 00rX_YRDL
+    write_uint(buf, 6)           # radius
+    write_sint(buf, 400)         # geometry-y (relative)
+
+    write_uint(buf, 27)          # CIRCLE record
+    write_byte(buf, 0b0010_1000) # 00rX_YRDL
+    write_uint(buf, 20)          # radius
+    write_sint(buf, 400)         # geometry-y (relative)
+
+    write_uint(buf, 27)          # CIRCLE record
+    write_byte(buf, 0b0010_1100) # 00rX_YRDL
+    write_uint(buf, 100)         # radius
+    write_sint(buf, 400)         # geometry-y (relative)
+    write_uint(buf, 1)           # repetition (3x4 matrix)
+    write_uint(buf, 1)           # (repetition) x-dimension
+    write_uint(buf, 2)           # (repetition) y-dimension
+    write_uint(buf, 400)         # (repetition) x-spacing
+    write_uint(buf, 300)         # (repetition) y-spacing
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_1() -> None:
+    buf = write_file_1(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+
+    geometry = layout.cells[0].geometry
+    assert len(geometry) == 7
+    for ii, gg in enumerate(geometry):
+        msg = f'Failed on circle {ii}'
+        assert gg.x == -100, msg
+        assert gg.y == 200 + 400 * ii, msg
+
+        assert gg.layer == 1, msg
+        assert gg.datatype == 2, msg
+        assert not gg.properties, msg
+        assert gg.radius == [150, 150, 0, 1, 6, 20, 100][ii], msg
+
+        if ii != 6:
+            assert gg.repetition is None, msg
+
+    assert geometry[6].repetition.a_count == 3, msg
+    assert geometry[6].repetition.b_count == 4, msg
+    assert geometry[6].repetition.a_vector == [400, 0], msg
+    assert geometry[6].repetition.b_vector == [0, 300], msg

fatamorgana/test/test_files_ctrapezoids.py

@@ -0,0 +1,247 @@
+# type: ignore
+
+from typing import List, Tuple, Iterable
+from itertools import chain
+from io import BytesIO, BufferedIOBase
+import struct
+
+import pytest       # type: ignore
+import numpy
+from numpy.testing import assert_equal
+
+from .utils import HEADER, FOOTER
+from ..basic import write_uint, write_sint, read_uint, read_sint, write_bstring, write_byte, PathExtensionScheme
+from ..basic import InvalidRecordError, InvalidDataError
+from ..main import OasisLayout
+
+
+def base_tests(layout: OasisLayout) -> None:
+    assert layout.version.string == '1.0'
+    assert layout.unit == 1000
+    assert layout.validation.checksum_type == 0
+
+    assert not layout.properties
+    assert not layout.propnames
+    assert not layout.xnames
+    assert not layout.textstrings
+    assert not layout.cellnames
+    assert not layout.layers
+
+
+def write_file_1(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    '''
+    buf.write(HEADER)
+
+    write_uint(buf, 14)          # CELL record (explicit)
+    write_bstring(buf, b'A')     # Cell name
+
+    write_uint(buf, 26)          # CTRAPEZOID record
+    write_byte(buf, 0b1111_1011) # TWHX_YRDL
+    write_uint(buf, 1)           # layer
+    write_uint(buf, 2)           # datatype
+    write_uint(buf, 24)          # ctrapezoid type
+    write_uint(buf, 100)         # width
+    write_uint(buf, 200)         # height
+    write_sint(buf, -100)        # geometry-x (absolute)
+    write_sint(buf, 200)         # geometry-y (absolute)
+
+    write_uint(buf, 16)          # XYRELATIVE record
+
+    write_uint(buf, 26)          # CTRAPEZOID record
+    write_byte(buf, 0b0000_1000) # TWHX_YRDL
+    write_sint(buf, 400)         # geometry-y (relative)
+
+    write_uint(buf, 20)          # RECTANGLE record
+    write_byte(buf, 0b0000_0011) # SWHX_YRDL
+    write_uint(buf, 2)           # layer
+    write_uint(buf, 3)           # datatype
+
+    h = [250, 100]
+    v = [100, 250]
+
+    wh = [h] * 8 + [v] * 8 + [h] * 6 + [v] * 2 + [h] * 2
+
+    wh_en = ([0b11] * 16
+           + [0b10] * 4
+           + [0b01] * 2
+           + [0b10] * 2
+           + [0b11, 0b10])
+
+    for t, (x, x_en) in enumerate(zip(wh, wh_en)):
+        write_uint(buf, 26)          # CTRAPEZOID record
+        write_byte(buf, 0b1000_1011 | (x_en << 5))    # TWHX_YRDL
+        write_uint(buf, 1)           # layer
+        write_uint(buf, 2)           # datatype
+        write_uint(buf, t)           # ctrapezoid type
+        if x_en & 0b10:
+            write_uint(buf, x[0])    # width
+        if x_en & 0b01:
+            write_uint(buf, x[1])    # height
+        write_sint(buf, 400)         # geometry-y (relative)
+
+        write_uint(buf, 20)          # RECTANGLE record
+        write_byte(buf, 0b0000_0011) # SWHX_YRDL
+        write_uint(buf, 2)           # layer
+        write_uint(buf, 3)           # datatype
+
+    write_uint(buf, 26)          # CTRAPEZOID record
+    write_byte(buf, 0b0000_1100) # TWHX_YRDL
+    write_sint(buf, 400)         # geometry-y (relative)
+    write_uint(buf, 1)           # repetition (3x4 matrix)
+    write_uint(buf, 1)           # (repetition) x-dimension
+    write_uint(buf, 2)           # (repetition) y-dimension
+    write_uint(buf, 400)         # (repetition) x-spacing
+    write_uint(buf, 300)         # (repetition) y-spacing
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_1() -> None:
+    buf = write_file_1(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+
+    assert len(layout.cells) == 1
+    assert layout.cells[0].name.string == 'A'
+    assert not layout.cells[0].properties
+
+    geometry = layout.cells[0].geometry
+    assert len(geometry) == 3 + 26 * 2 + 1
+
+    for ii, gg in enumerate(geometry):
+        msg = f'Failed on shape {ii}'
+        assert gg.x == -100, msg
+        assert gg.y == 200 + 400 * ((ii + 1) // 2), msg
+
+        if ii < 2 or (3 <= ii < 55 and ii % 2 == 1):
+            assert gg.layer == 1, msg
+            assert gg.datatype == 2, msg
+        else:
+            assert gg.layer == 2, msg
+            assert gg.datatype == 3, msg
+
+        if ii < 3:
+            assert gg.width == 100, msg
+            assert gg.height == 200, msg
+
+        assert not gg.properties, msg
+
+        if 3 <= ii < 55:
+            ct_type = (ii - 3) // 2
+            is_ctrapz = ii % 2 == 1
+            if is_ctrapz:
+                assert gg.ctrapezoid_type == ct_type, msg
+            if ct_type in range(16, 20):
+                assert gg.height == [250, None][is_ctrapz], msg
+            elif ct_type in (20, 21):
+                assert gg.width == [250, None][is_ctrapz], msg
+            elif ct_type in range(22, 24) or ct_type == 25:
+                assert gg.height == [100, None][is_ctrapz], msg
+            else:
+                if ct_type < 8 or 16 <= ct_type < 25 or 26 <= ct_type :
+                    assert gg.width == 250, msg
+                    assert gg.height == 100, msg
+                else:
+                    assert gg.width == 100, msg
+                    assert gg.height == 250, msg
+        elif ii < 3 and ii % 2:
+            assert gg.ctrapezoid_type == 24, msg
+        elif ii == 55:
+            assert gg.ctrapezoid_type == 25, msg
+
+    assert geometry[55].repetition.a_count == 3
+    assert geometry[55].repetition.b_count == 4
+    assert geometry[55].repetition.a_vector == [400, 0]
+    assert geometry[55].repetition.b_vector == [0, 300]
+
+
+def write_file_2(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    '''
+    buf.write(HEADER)
+
+    write_uint(buf, 14)          # CELL record (explicit)
+    write_bstring(buf, b'A')     # Cell name
+
+    # Shouldn't access (undefined) height modal, despite not having a height.
+    write_uint(buf, 26)          # CTRAPEZOID record
+    write_byte(buf, 0b1101_1011) # TWHX_YRDL
+    write_uint(buf, 1)           # layer
+    write_uint(buf, 2)           # datatype
+    write_uint(buf, 16)          # ctrapezoid type
+    write_uint(buf, 200)         # width
+    write_sint(buf, -100)        # geometry-x (absolute)
+    write_sint(buf, 200)         # geometry-y (absolute)
+
+    write_uint(buf, 16)          # XYRELATIVE record
+
+    write_uint(buf, 26)          # CTRAPEZOID record
+    write_byte(buf, 0b0000_1000) # TWHX_YRDL
+    write_sint(buf, 400)         # geometry-y (relative)
+
+    write_uint(buf, 14)          # CELL record (explicit)
+    write_bstring(buf, b'B')     # Cell name
+
+    # Shouldn't access (undefined) width modal, despite not having a width.
+    write_uint(buf, 26)          # CTRAPEZOID record
+    write_byte(buf, 0b1011_1011) # TWHX_YRDL
+    write_uint(buf, 1)           # layer
+    write_uint(buf, 2)           # datatype
+    write_uint(buf, 20)          # ctrapezoid type
+    write_uint(buf, 200)         # height
+    write_sint(buf, -100)        # geometry-x (absolute)
+    write_sint(buf, 200)         # geometry-y (absolute)
+
+    write_uint(buf, 16)          # XYRELATIVE record
+
+    write_uint(buf, 26)          # CTRAPEZOID record
+    write_byte(buf, 0b0000_1000) # TWHX_YRDL
+    write_sint(buf, 400)         # geometry-y (relative)
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_2() -> None:
+    buf = write_file_2(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+
+    assert len(layout.cells) == 2
+    assert layout.cells[0].name.string == 'A'
+    assert layout.cells[1].name.string == 'B'
+    assert not layout.cells[0].properties
+    assert not layout.cells[1].properties
+
+    for ii, cc in enumerate(layout.cells):
+        for jj, gg in enumerate(cc.geometry):
+            msg = f'Fail in cell {ii}, ctrapezoid {jj}'
+            assert not gg.properties, msg
+            assert gg.layer == 1, msg
+            assert gg.datatype == 2, msg
+            assert gg.x == -100, msg
+
+    geometry = layout.cells[0].geometry
+    assert geometry[0].width == 200
+    assert geometry[1].width == 200
+    assert geometry[0].ctrapezoid_type == 16
+    assert geometry[1].ctrapezoid_type == 16
+    assert geometry[0].y == 200
+    assert geometry[1].y == 600
+
+    geometry = layout.cells[1].geometry
+    assert geometry[0].height == 200
+    assert geometry[1].height == 200
+    assert geometry[0].ctrapezoid_type == 20
+    assert geometry[1].ctrapezoid_type == 20
+    assert geometry[0].y == 200
+    assert geometry[1].y == 600
+

fatamorgana/test/test_files_empty.py

@@ -0,0 +1,185 @@
+# type: ignore
+
+from typing import List, Tuple, Iterable
+from itertools import chain
+from io import BytesIO, BufferedIOBase
+import struct
+
+import pytest       # type: ignore
+
+from .utils import MAGIC_BYTES, FOOTER
+from ..basic import write_uint, write_sint, read_uint, read_sint, write_bstring
+from ..main import OasisLayout
+
+
+def base_tests(layout: OasisLayout) -> None:
+    assert layout.version.string == '1.0'
+    assert layout.validation.checksum_type == 0
+
+    assert not layout.properties
+    assert not layout.cells
+    assert not layout.cellnames
+    assert not layout.propnames
+    assert not layout.xnames
+    assert not layout.textstrings
+    assert not layout.propstrings
+    assert not layout.layers
+
+
+def write_file_1(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    File contains one PAD record.
+    1000 units/micron
+    Offset table inside START.
+    '''
+    buf.write(MAGIC_BYTES)
+
+    write_uint(buf, 1)           # START record
+    write_bstring(buf, b'1.0')   # version
+    write_uint(buf, 0)           # dbu real type: uint
+    write_uint(buf, 1000)        # dbu value: 1000 per micron
+    write_uint(buf, 0)           # offset table is present here
+    for _ in range(6):
+        write_uint(buf, 0)       # offset table (0: not strict)
+        write_uint(buf, 0)       # offset table (0: no entry present)
+
+    write_uint(buf, 0)           # PAD record
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_1() -> None:
+    buf = write_file_1(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+    assert layout.unit == 1000
+
+
+
+def write_file_2(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    File contains no records.
+    1/2 unit/micron
+    Offset table inside START.
+    '''
+    buf.write(MAGIC_BYTES)
+
+    write_uint(buf, 1)           # START record
+    write_bstring(buf, b'1.0')   # version
+    write_uint(buf, 2)           # dbu real type: fraction 1/x
+    write_uint(buf, 2)           # dbu value: 1/2 per micron
+    write_uint(buf, 0)           # offset table is present here
+    for _ in range(6):
+        write_uint(buf, 0)       # offset table (0: not strict)
+        write_uint(buf, 0)       # offset table (0: no entry present)
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_2() -> None:
+    buf = write_file_2(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+    assert layout.unit == 0.5
+
+
+def write_file_3(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    File contains no records.
+    10/4 unit/micron
+    Offset table inside START.
+    '''
+    buf.write(MAGIC_BYTES)
+
+    write_uint(buf, 1)           # START record
+    write_bstring(buf, b'1.0')   # version
+    write_uint(buf, 4)           # dbu real type: fraction a/b
+    write_uint(buf, 10)           # dbu value a
+    write_uint(buf, 4)           # dbu value b: 10/4 per micron
+    write_uint(buf, 0)           # offset table is present here
+    for _ in range(6):
+        write_uint(buf, 0)       # offset table (0: not strict)
+        write_uint(buf, 0)       # offset table (0: no entry present)
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_3() -> None:
+    buf = write_file_3(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+    assert layout.unit == 10 / 4
+
+
+def write_file_4(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    File contains no records.
+    12.5 unit/micron (float32)
+    Offset table inside START.
+    '''
+    buf.write(MAGIC_BYTES)
+
+    write_uint(buf, 1)           # START record
+    write_bstring(buf, b'1.0')   # version
+    write_uint(buf, 6)           # dbu real type: float32
+    buf.write(struct.pack("<f", 12.5))   # dbu value: 12.5
+    write_uint(buf, 0)           # offset table is present here
+    for _ in range(6):
+        write_uint(buf, 0)       # offset table (0: not strict)
+        write_uint(buf, 0)       # offset table (0: no entry present)
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_4() -> None:
+    buf = write_file_4(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+    assert layout.unit == 12.5
+
+
+def write_file_5(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    File contains no records.
+    12.5 unit/micron (float64)
+    Offset table inside START.
+    '''
+    buf.write(MAGIC_BYTES)
+
+    write_uint(buf, 1)           # START record
+    write_bstring(buf, b'1.0')   # version
+    write_uint(buf, 7)           # dbu real type: float64
+    buf.write(struct.pack("<d", 12.5))   # dbu value: 12.5
+    write_uint(buf, 0)           # offset table is present here
+    for _ in range(6):
+        write_uint(buf, 0)       # offset table (0: not strict)
+        write_uint(buf, 0)       # offset table (0: no entry present)
+
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_5() -> None:
+    buf = write_file_5(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+    assert layout.unit == 12.5

fatamorgana/test/test_files_layernames.py

@@ -0,0 +1,338 @@
+# type: ignore
+
+from typing import List, Tuple, Iterable, Sequence
+from itertools import chain
+from io import BytesIO, BufferedIOBase
+
+import pytest       # type: ignore
+import numpy
+from numpy.testing import assert_equal
+
+from .utils import HEADER, FOOTER
+from ..basic import write_uint, write_sint, read_uint, read_sint, write_bstring, write_byte, PathExtensionScheme
+from ..basic import InvalidRecordError, InvalidDataError
+from ..main import OasisLayout
+
+
+LAYERS = [(1, 2), (1, 5), (1, 6), (1, 8),
+          (5, 2), (5, 5), (5, 6), (5, 8),
+          (6, 2), (6, 5), (6, 6), (6, 8),
+          (7, 2), (7, 5), (7, 6), (7, 8),
+          ]
+
+def base_tests(layout: OasisLayout) -> None:
+    assert layout.version.string == '1.0'
+    assert layout.unit == 1000
+    assert layout.validation.checksum_type == 0
+
+    assert not layout.properties
+    assert not layout.propnames
+    assert not layout.xnames
+    assert not layout.textstrings
+    assert not layout.cellnames
+
+    assert len(layout.cells) == 1
+    assert layout.cells[0].name.string == 'A'
+    assert not layout.cells[0].properties
+
+
+def write_names_geom(buf: BufferedIOBase, short: bool = False) -> BufferedIOBase:
+    write_uint(buf, 11)         # LAYERNAME record (geometry)
+    write_bstring(buf, b'AA')   # name
+    write_uint(buf, 0)          # all layers
+    write_uint(buf, 0)          # all datatypes
+
+    write_uint(buf, 11)         # LAYERNAME record (geometry)
+    write_bstring(buf, b'L5A')  # name
+    write_uint(buf, 1)          # layer <=5
+    write_uint(buf, 5)          # (...)
+    write_uint(buf, 0)          # all datatypes
+
+    write_uint(buf, 11)         # LAYERNAME record (geometry)
+    write_bstring(buf, b'H5A')  # name
+    write_uint(buf, 2)          # layer >=5
+    write_uint(buf, 5)          # (...)
+    write_uint(buf, 0)          # all datatypes
+
+    write_uint(buf, 11)         # LAYERNAME record (geometry)
+    write_bstring(buf, b'E5A')  # name
+    write_uint(buf, 3)          # layer ==5
+    write_uint(buf, 5)          # (...)
+    write_uint(buf, 0)          # all datatypes
+
+    write_uint(buf, 11)         # LAYERNAME record (geometry)
+    write_bstring(buf, b'I56A') # name
+    write_uint(buf, 4)          # layer 5 to 6
+    write_uint(buf, 5)          # (...)
+    write_uint(buf, 6)          # (...)
+    write_uint(buf, 0)          # all datatypes
+
+    if short:
+        return buf
+
+    write_uint(buf, 11)         # LAYERNAME record (geometry)
+    write_bstring(buf, b'E5L4') # name
+    write_uint(buf, 3)          # layer ==5
+    write_uint(buf, 5)          # (...)
+    write_uint(buf, 1)          # datatype <=4
+    write_uint(buf, 4)          # (...)
+
+    write_uint(buf, 11)         # LAYERNAME record (geometry)
+    write_bstring(buf, b'E5H4') # name
+    write_uint(buf, 3)          # layer ==5
+    write_uint(buf, 5)          # (...)
+    write_uint(buf, 2)          # datatype >=4
+    write_uint(buf, 4)          # (...)
+
+    write_uint(buf, 11)         # LAYERNAME record (geometry)
+    write_bstring(buf, b'E5E4') # name
+    write_uint(buf, 3)          # layer ==5
+    write_uint(buf, 5)          # (...)
+    write_uint(buf, 3)          # datatype ==4
+    write_uint(buf, 4)          # (...)
+
+    write_uint(buf, 11)         # LAYERNAME record (geometry)
+    write_bstring(buf, b'E5I47') # name
+    write_uint(buf, 3)          # layer ==5
+    write_uint(buf, 5)          # (...)
+    write_uint(buf, 4)          # datatype 4 to 7
+    write_uint(buf, 4)          # (...)
+    write_uint(buf, 7)          # (...)
+
+    return buf
+
+
+def write_names_text(buf: BufferedIOBase, prefix: bytes = b'') -> BufferedIOBase:
+    write_uint(buf, 12)         # LAYERNAME record (geometry)
+    write_bstring(buf, prefix + b'AA')   # name
+    write_uint(buf, 0)          # all layers
+    write_uint(buf, 0)          # all datatypes
+
+    write_uint(buf, 12)         # LAYERNAME record (geometry)
+    write_bstring(buf, prefix + b'L5A')  # name
+    write_uint(buf, 1)          # layer <=5
+    write_uint(buf, 5)          # (...)
+    write_uint(buf, 0)          # all datatypes
+
+    write_uint(buf, 12)         # LAYERNAME record (geometry)
+    write_bstring(buf, prefix + b'H5A')  # name
+    write_uint(buf, 2)          # layer >=5
+    write_uint(buf, 5)          # (...)
+    write_uint(buf, 0)          # all datatypes
+
+    write_uint(buf, 12)         # LAYERNAME record (geometry)
+    write_bstring(buf, prefix + b'E5A')  # name
+    write_uint(buf, 3)          # layer ==5
+    write_uint(buf, 5)          # (...)
+    write_uint(buf, 0)          # all datatypes
+
+    write_uint(buf, 12)         # LAYERNAME record (geometry)
+    write_bstring(buf, prefix + b'I56A') # name
+    write_uint(buf, 4)          # layer 5 to 6
+    write_uint(buf, 5)          # (...)
+    write_uint(buf, 6)          # (...)
+    write_uint(buf, 0)          # all datatypes
+    return buf
+
+def write_geom(buf: BufferedIOBase) -> BufferedIOBase:
+    for ll, dt in LAYERS:
+        write_uint(buf, 27)           # CIRCLE record
+        write_byte(buf, 0b0011_1011)  # 00rX_YRDL
+        write_uint(buf, ll)           # layer
+        write_uint(buf, dt)           # datatype
+        write_uint(buf, 150)          # radius
+        write_sint(buf, ll * 1000)    # geometry-x (absolute)
+        write_sint(buf, dt * 1000)    # geometry-y (absolute)
+    return buf
+
+
+def write_text(buf: BufferedIOBase) -> BufferedIOBase:
+    for ll, dt in LAYERS:
+        write_uint(buf, 19)              # TEXT record
+        write_byte(buf, 0b0101_1011)     # 0CNX_YRTL
+        write_bstring(buf, b'A')         # text-string
+        write_uint(buf, ll)              # text-layer
+        write_uint(buf, dt)              # text-datatype
+        write_sint(buf, ll * 1000)       # geometry-x
+        write_sint(buf, dt * 1000)       # geometry-y
+    return buf
+
+
+def name_test(layers: Sequence, is_textlayer: bool) -> None:
+    for ii, nn in enumerate(layers):
+        assert is_textlayer == nn.is_textlayer, f'Fail on layername {ii}'
+
+        assert nn.nstring.string == ['AA', 'L5A', 'H5A', 'E5A', 'I56A',
+                                     'E5L4', 'E5H4', 'E5E4', 'E5I47'][ii], msg
+        assert nn.layer_interval[0] == [None, None, 5, 5, 5, 5, 5, 5, 5][ii], msg
+        assert nn.layer_interval[1] == [None, 5, None, 5, 6, 5, 5, 5, 5][ii], msg
+        assert nn.type_interval[0] == [None, None, None, None, None, None, 4, 4, 4][ii], msg
+        assert nn.type_interval[1] == [None, None, None, None, None, 4, None, 4, 7][ii], msg
+
+
+def name_test_text(layers: Sequence) -> None:
+    for ii, nn in enumerate(layers):
+        assert nn.is_textlayer, f'Fail on layername {ii}'
+
+        assert nn.nstring.string == ['TAA', 'TL5A', 'TH5A', 'TE5A', 'TI56A'][ii], msg
+        assert nn.layer_interval[0] == [None, None, 5, 5, 5][ii], msg
+        assert nn.layer_interval[1] == [None, 5, None, 5, 6][ii], msg
+        assert nn.type_interval[0] == [None, None, None, None, None][ii], msg
+        assert nn.type_interval[1] == [None, None, None, None, None][ii], msg
+
+
+def elem_test_geom(geometry: Sequence) -> None:
+    for ii, gg in enumerate(geometry):
+        msg = f'Failed on circle ({ii})'
+        assert gg.x == 1000 * LAYERS[ii][0], msg
+        assert gg.y == 1000 * LAYERS[ii][1], msg
+        assert gg.radius == 150, msg
+
+        assert gg.layer == LAYERS[ii][0], msg
+        assert gg.datatype == LAYERS[ii][1], msg
+
+        assert gg.repetition is None, msg
+        assert not gg.properties, msg
+
+
+def elem_test_text(geometry: Sequence) -> None:
+    for ii, gg in enumerate(geometry):
+        msg = f'Failed on text ({ii})'
+        assert gg.x == 1000 * LAYERS[ii][0], msg
+        assert gg.y == 1000 * LAYERS[ii][1], msg
+        assert gg.string.string == 'A', msg
+
+        assert gg.layer == LAYERS[ii][0], msg
+        assert gg.datatype == LAYERS[ii][1], msg
+
+        assert gg.repetition is None, msg
+        assert not gg.properties, msg
+
+
+def write_file_1(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    '''
+    buf.write(HEADER)
+    write_names_geom(buf)
+
+    write_uint(buf, 14)          # CELL record (explicit)
+    write_bstring(buf, b'A')     # Cell name
+
+    write_geom(buf)
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_1() -> None:
+    buf = write_file_1(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+
+    geometry = layout.cells[0].geometry
+    assert len(geometry) == len(LAYERS)
+    elem_test_geom(geometry)
+
+    assert len(layout.layers) == 9
+    name_test(layout.layers, is_textlayer=False)
+
+
+def write_file_2(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    '''
+    buf.write(HEADER)
+    write_names_text(buf)
+
+    write_uint(buf, 14)          # CELL record (explicit)
+    write_bstring(buf, b'A')     # Cell name
+
+    write_text(buf)
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_2() -> None:
+    buf = write_file_2(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+
+    geometry = layout.cells[0].geometry
+    assert len(geometry) == len(LAYERS)
+    elem_test_text(geometry)
+
+    assert len(layout.layers) == 5
+    name_test(layout.layers, is_textlayer=True)
+
+
+def write_file_3(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    '''
+    buf.write(HEADER)
+    write_names_text(buf, prefix=b'T')
+    write_names_geom(buf, short=True)
+
+    write_uint(buf, 14)          # CELL record (explicit)
+    write_bstring(buf, b'A')     # Cell name
+
+    write_text(buf)
+    write_geom(buf)
+    buf.write(FOOTER)
+    return buf
+
+
+def write_file_4(buf: BufferedIOBase) -> BufferedIOBase:
+    '''
+    '''
+    buf.write(HEADER)
+
+    write_uint(buf, 14)          # CELL record (explicit)
+    write_bstring(buf, b'A')     # Cell name
+
+    write_text(buf)
+    write_geom(buf)
+
+    write_names_text(buf, prefix=b'T')
+    write_names_geom(buf, short=True)
+    buf.write(FOOTER)
+    return buf
+
+
+def test_file_3() -> None:
+    buf = write_file_3(BytesIO())
+
+    buf.seek(0)
+    layout = OasisLayout.read(buf)
+
+    base_tests(layout)
+
+    geometry = layout.cells[0].geometry
+    assert len(geometry) == 2 * len(LAYERS)
+    elem_test_text(geometry[:len(LAYERS)])