pythonnative/tests/test_extended_components.py at v0.41.0 · pythonnative/pythonnative · GitHub

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"""Unit tests for the breadth expansion: new components and the new

props added to existing components.

These assert the Element shape produced by each factory (type, props,

children, dropped ``None`` defaults), which is the platform-agnostic

contract the native handlers consume.

"""

from __future__ import annotations

from pythonnative.components import (

ActivityIndicator,

Checkbox,

DatePicker,

FlatList,

ImageBackground,

Modal,

ProgressBar,

ScrollView,

SegmentedControl,

Text,

TextInput,

TouchableOpacity,

WebView,

)

# ======================================================================

# TouchableOpacity

# ======================================================================

def test_touchable_opacity_is_pressable_with_active_opacity() -> None:

cb = lambda: None # noqa: E731

el = TouchableOpacity(Text("Tap"), on_press=cb, active_opacity=0.3)

assert el.type == "Pressable"

assert el.props["pressed_opacity"] == 0.3

assert el.props["on_press"] is cb

assert el.props["accessibility_role"] == "button"

assert len(el.children) == 1

def test_touchable_opacity_disabled_drops_callbacks_and_dims() -> None:

cb = lambda: None # noqa: E731

el = TouchableOpacity(Text("Tap"), on_press=cb, disabled=True)

assert "on_press" not in el.props

assert el.props["opacity"] == 0.4

# ======================================================================

# ImageBackground

# ======================================================================

def test_image_background_layers_image_then_content() -> None:

el = ImageBackground(Text("Overlay"), source="bg.png")

assert el.type == "View"

assert len(el.children) == 2

background, content = el.children

assert background.type == "Image"

assert background.props["source"] == "bg.png"

assert background.props["scale_type"] == "cover"

assert background.props["position"] == "absolute"

assert background.props["top"] == 0

assert content.type == "View"

assert content.children[0].props["text"] == "Overlay"

def test_image_background_respects_explicit_scale_type() -> None:

el = ImageBackground(source="bg.png", scale_type="contain")

assert el.children[0].props["scale_type"] == "contain"

# ======================================================================

# Checkbox

# ======================================================================

def test_checkbox_props_and_default_role() -> None:

cb = lambda _v: None # noqa: E731

el = Checkbox(value=True, on_change=cb, label="Accept", color="#FF0000")

assert el.type == "Checkbox"

assert el.props["value"] is True

assert el.props["on_change"] is cb

assert el.props["label"] == "Accept"

assert el.props["color"] == "#FF0000"

assert el.props["accessibility_role"] == "checkbox"

def test_checkbox_disabled_flag_dropped_when_false() -> None:

el = Checkbox(value=False)

assert "disabled" not in el.props

assert el.props["value"] is False

# ======================================================================

# SegmentedControl

# ======================================================================

def test_segmented_control_props() -> None:

cb = lambda _i: None # noqa: E731

el = SegmentedControl(segments=["Day", "Week", "Month"], selected_index=1, on_change=cb)

assert el.type == "SegmentedControl"

assert el.props["segments"] == ["Day", "Week", "Month"]

assert el.props["selected_index"] == 1

assert el.props["on_change"] is cb

def test_segmented_control_defaults_empty() -> None:

el = SegmentedControl()

assert el.props["segments"] == []

assert el.props["selected_index"] == 0

# ======================================================================

# DatePicker

# ======================================================================

def test_date_picker_props_and_default_role() -> None:

cb = lambda _v: None # noqa: E731

el = DatePicker(value="2026-05-31", mode="date", on_change=cb, minimum="2026-01-01")

assert el.type == "DatePicker"

assert el.props["value"] == "2026-05-31"

assert el.props["mode"] == "date"

assert el.props["on_change"] is cb

assert el.props["minimum"] == "2026-01-01"

assert el.props["accessibility_role"] == "button"

def test_date_picker_time_mode() -> None:

el = DatePicker(mode="time")

assert el.props["mode"] == "time"

# ======================================================================

# Enriched existing components

# ======================================================================

def test_progress_bar_color_and_indeterminate() -> None:

el = ProgressBar(value=0.5, color="#00FF00", track_color="#EEEEEE", indeterminate=True)

assert el.props["value"] == 0.5

assert el.props["color"] == "#00FF00"

assert el.props["track_color"] == "#EEEEEE"

assert el.props["indeterminate"] is True

def test_progress_bar_indeterminate_dropped_when_false() -> None:

el = ProgressBar(value=0.25)

assert "indeterminate" not in el.props

def test_activity_indicator_color_and_size() -> None:

el = ActivityIndicator(color="#123456", size="large")

assert el.props["color"] == "#123456"

assert el.props["size"] == "large"

def test_web_view_html_and_callbacks() -> None:

on_load = lambda _u: None # noqa: E731

on_message = lambda _m: None # noqa: E731

el = WebView(html="<h1>Hi</h1>", on_load=on_load, on_message=on_message, inject_javascript="1;")

assert el.props["html"] == "<h1>Hi</h1>"

assert el.props["on_load"] is on_load

assert el.props["on_message"] is on_message

assert el.props["inject_javascript"] == "1;"

def test_web_view_scroll_enabled_dropped_when_true() -> None:

el = WebView(url="https://example.com")

assert "scroll_enabled" not in el.props

el2 = WebView(url="https://example.com", scroll_enabled=False)

assert el2.props["scroll_enabled"] is False

def test_text_input_new_props() -> None:

on_focus = lambda: None # noqa: E731

on_blur = lambda: None # noqa: E731

el = TextInput(

value="x",

editable=False,

clear_button=True,

on_focus=on_focus,

on_blur=on_blur,

selection_color="#FF00FF",

text_content_type="password",

)

assert el.props["editable"] is False

assert el.props["clear_button"] is True

assert el.props["on_focus"] is on_focus

assert el.props["on_blur"] is on_blur

assert el.props["selection_color"] == "#FF00FF"

assert el.props["text_content_type"] == "password"

def test_text_input_editable_dropped_when_true() -> None:

el = TextInput(value="x")

assert "editable" not in el.props

assert "clear_button" not in el.props

def test_scroll_view_new_props() -> None:

on_scroll = lambda _payload: None # noqa: E731

el = ScrollView(

Text("body"),

on_scroll=on_scroll,

shows_scroll_indicator=False,

paging_enabled=True,

bounces=False,

keyboard_dismiss_mode="on_drag",

content_container_style={"padding": 8},

)

assert el.props["on_scroll"] is on_scroll

assert el.props["shows_scroll_indicator"] is False

assert el.props["paging_enabled"] is True

assert el.props["bounces"] is False

assert el.props["keyboard_dismiss_mode"] == "on_drag"

assert el.props["content_container_style"] == {"padding": 8}

def test_scroll_view_defaults_drop_noise() -> None:

el = ScrollView(Text("body"))

for noisy in ("shows_scroll_indicator", "paging_enabled", "bounces", "content_container_style"):

assert noisy not in el.props

def test_modal_new_props() -> None:

on_show = lambda: None # noqa: E731

el = Modal(

Text("content"), visible=True, on_show=on_show, presentation_style="form_sheet", dismiss_on_backdrop=False

)

assert el.props["on_show"] is on_show

assert el.props["presentation_style"] == "form_sheet"

assert el.props["dismiss_on_backdrop"] is False

# ======================================================================

# FlatList: grid, horizontal, header/footer, empty, on_end_reached

# ======================================================================

def _mount(el): # type: ignore[no-untyped-def]

from pythonnative.reconciler import Reconciler

from pythonnative.testing import FakeBackend

backend = FakeBackend()

rec = Reconciler(backend)

rec.on_render_requested = lambda: None

root = rec.mount(el)

return root, rec, backend

def test_flatlist_grid_chunks_into_rows() -> None:

el = FlatList(

data=list(range(5)),

num_columns=2,

render_item=lambda item, _i: Text(str(item)),

)

# 3 virtual rows: [0,1], [2,3], [4]

assert len(el.props["rows"]) == 3

root, _rec, _backend = _mount(el)

rows = root.find_all("Row")

assert len(rows) == 3

assert len(rows[0].children) == 2

assert len(rows[2].children) == 1

def test_flatlist_horizontal_scrolls_on_x_axis() -> None:

el = FlatList(data=[1, 2, 3], horizontal=True, render_item=lambda i, _i: Text(str(i)))

assert el.props["horizontal"] is True

root, _rec, _backend = _mount(el)

assert root.type_name == "ScrollView"

assert root.props["scroll_axis"] == "horizontal"

# The content wrapper lays rows out horizontally.

assert root.find_first("Row") is not None

def test_flatlist_header_and_footer() -> None:

el = FlatList(

data=[1, 2],

item_height=20,

render_item=lambda i, _i: Text(str(i)),

list_header=Text("HEADER"),

list_footer=Text("FOOTER"),

)

root, _rec, _backend = _mount(el)

texts = [v.props["text"] for v in root.find_all("Text")]

assert texts[0] == "HEADER"

assert texts[-1] == "FOOTER"

assert texts[1:-1] == ["1", "2"]

def test_flatlist_empty_state() -> None:

el = FlatList(

data=[],

item_height=20,

render_item=lambda i, _i: Text(str(i)),

list_empty=Text("Nothing here"),

)

root, _rec, _backend = _mount(el)

texts = [v.props["text"] for v in root.find_all("Text")]

assert texts == ["Nothing here"]

def test_flatlist_on_end_reached_fires_near_the_end() -> None:

from pythonnative.events import dispatch_event

fired: list = []

el = FlatList(

data=list(range(100)),

item_height=30,

on_end_reached=lambda: fired.append(1),

on_end_reached_threshold=0.5,

)

assert el.props["on_end_reached_threshold"] == 0.5

_root, rec, _backend = _mount(el)

tag = rec.root_tag

# Far from the end: no callback.

dispatch_event(tag, "on_scroll", {"x": 0.0, "y": 0.0})

assert fired == []

# Content extent is 100 * 30 = 3000; the default viewport estimate is

# 800, so an offset near the bottom crosses the 0.5-viewport line.

dispatch_event(tag, "on_scroll", {"x": 0.0, "y": 3000.0 - 800.0 - 100.0})

assert fired == [1]

# The latch prevents refiring while still near the end.

dispatch_event(tag, "on_scroll", {"x": 0.0, "y": 3000.0 - 800.0 - 50.0})

assert fired == [1]

pythonnative/tests/test_extended_components.py at v0.41.0 · pythonnative/pythonnative · GitHub

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