chore(meter): add vrt coverage

2nd-gen/packages/swc/components/meter/test/vrt/meter-custom-properties.vrt.ts

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+/**
+ * Copyright 2026 Adobe. All rights reserved.
+ * This file is licensed to you under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License. You may obtain a copy
+ * of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under
+ * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
+ * OF ANY KIND, either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+
+import { html, nothing } from 'lit';
+import type { Meta, StoryObj as Story } from '@storybook/web-components';
+
+import '@adobe/spectrum-wc/components/meter/swc-meter.js';
+
+import type { CustomPropertyCase } from '../../../../.storybook/helpers/index.js';
+import {
+  coveredCustomProperties,
+  customPropertyRows,
+  theme,
+  verifyCustomPropertyCoverage,
+  vrtParameters,
+} from '../../../../.storybook/helpers/index.js';
+import customElementsManifest from '../../../../dist/custom-elements.json';
+
+// Metadata
+
+const meta: Meta = {
+  title: 'Meter/Meter VRT',
+  component: 'swc-meter',
+  tags: ['dev'],
+};
+
+export default meta;
+
+// Helpers
+
+// Every `--swc-linear-progress-*` custom property documented on
+// `<swc-meter>` (see Meter.ts's `@cssprop` list) is a public contract that
+// `<swc-meter>` shares with the not-yet-migrated `<swc-progress-bar>`. One
+// row per property: a reference meter next to the same meter with that one
+// property overridden to an obviously different value, so a real difference
+// confirms the override still works.
+type MeterPropertyCase = CustomPropertyCase<`--swc-linear-progress-${string}`>;
+
+const MOD_PROPERTY_CASES: readonly MeterPropertyCase[] = [
+  { property: '--swc-linear-progress-fill-color', value: 'magenta' },
+  { property: '--swc-linear-progress-track-color', value: 'magenta' },
+  // `magenta` text on the default light background fails WCAG contrast
+  // (~2.3:1, well under the 4.5:1 AA minimum for normal text), which the
+  // axe check run against this `dev`-tagged story would flag. `darkmagenta`
+  // (~7.5:1 on white) stays obviously different from the default subdued
+  // gray while passing contrast. `fill-color`/`track-color` above aren't
+  // text colors, so they aren't subject to this check.
+  { property: '--swc-linear-progress-text-color', value: 'darkmagenta' },
+  { property: '--swc-linear-progress-thickness', value: '40px' },
+  { property: '--swc-linear-progress-font-size', value: '32px' },
+  { property: '--swc-linear-progress-top-to-text', value: '40px' },
+];
+
+const modPropertyMeter = (_case: MeterPropertyCase, style?: string) => html`
+  <swc-meter value="60" style=${style ?? nothing}>
+    <span slot="label">Storage used</span>
+  </swc-meter>
+`;
+
+const modPropertiesContent = () =>
+  customPropertyRows(MOD_PROPERTY_CASES, modPropertyMeter);
+
+const coveredMeterCustomProperties =
+  coveredCustomProperties(MOD_PROPERTY_CASES);
+
+const verifyCoverage = async () => {
+  await verifyCustomPropertyCoverage({
+    customElementsManifest,
+    modulePath: 'components/meter/Meter.ts',
+    declarationName: 'Meter',
+    coveredProperties: coveredMeterCustomProperties,
+  });
+};
+
+// VRT stories
+
+export const CustomProperties: Story = {
+  render: () => theme(modPropertiesContent(), 'light', 'ltr'),
+  parameters: vrtParameters,
+  play: verifyCoverage,
+};

2nd-gen/packages/swc/components/meter/test/vrt/meter.vrt.ts

@@ -0,0 +1,269 @@
+/**
+ * Copyright 2026 Adobe. All rights reserved.
+ * This file is licensed to you under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License. You may obtain a copy
+ * of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under
+ * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
+ * OF ANY KIND, either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+
+import { html, nothing } from 'lit';
+import type { Meta, StoryObj as Story } from '@storybook/web-components';
+
+import {
+  METER_VARIANTS,
+  type MeterVariant,
+} from '@adobe/spectrum-wc-core/components/meter';
+import {
+  LINEAR_PROGRESS_LABEL_POSITIONS,
+  LINEAR_PROGRESS_STATIC_COLORS,
+  LINEAR_PROGRESS_VALID_SIZES,
+  type LinearProgressLabelPosition,
+  type LinearProgressSize,
+  type LinearProgressStaticColor,
+} from '@adobe/spectrum-wc-core/mixins/index.js';
+
+import '@adobe/spectrum-wc/components/meter/swc-meter.js';
+
+import {
+  forcedColorsVrtParameters,
+  row,
+  staticColorBackground,
+  theme,
+  vrtParameters,
+} from '../../../../.storybook/helpers/index.js';
+
+// Metadata
+
+const meta: Meta = {
+  title: 'Meter/Meter VRT',
+  component: 'swc-meter',
+  tags: ['dev'],
+};
+
+export default meta;
+
+// Helpers
+
+const sizeLabels = {
+  s: 'Small',
+  m: 'Medium',
+  l: 'Large',
+  xl: 'Extra-large',
+} as const satisfies Record<LinearProgressSize, string>;
+
+const variantLabels = {
+  informative: 'Informative',
+  positive: 'Positive',
+  notice: 'Notice',
+  negative: 'Negative',
+} as const satisfies Record<MeterVariant, string>;
+
+const labelPositionLabels = {
+  top: 'Top label',
+  side: 'Side label',
+} as const satisfies Record<LinearProgressLabelPosition, string>;
+
+const staticColorLabels = {
+  white: 'Static white',
+  black: 'Static black',
+} as const satisfies Record<LinearProgressStaticColor, string>;
+
+type MeterCase = {
+  size?: LinearProgressSize;
+  variant?: MeterVariant;
+  value?: number;
+  minValue?: number;
+  maxValue?: number;
+  labelPosition?: LinearProgressLabelPosition;
+  staticColor?: LinearProgressStaticColor;
+  label?: string;
+  description?: string;
+  accessibleLabel?: string;
+  valueLabel?: string;
+  formatOptions?: Intl.NumberFormatOptions;
+  lang?: string;
+  style?: string;
+};
+
+// `formatOptions` is a JS-only property (no attribute), so it's set via a
+// `.formatOptions=` property binding rather than an attribute like the rest
+// of these cases.
+const renderMeter = ({
+  size,
+  variant,
+  value = 50,
+  minValue,
+  maxValue,
+  labelPosition,
+  staticColor,
+  label,
+  description,
+  accessibleLabel,
+  valueLabel,
+  formatOptions,
+  lang,
+  style,
+}: MeterCase) => html`
+  <swc-meter
+    size=${size ?? nothing}
+    variant=${variant ?? nothing}
+    value=${value}
+    min-value=${minValue ?? nothing}
+    max-value=${maxValue ?? nothing}
+    label-position=${labelPosition ?? nothing}
+    static-color=${staticColor ?? nothing}
+    accessible-label=${accessibleLabel ?? nothing}
+    value-label=${valueLabel ?? nothing}
+    lang=${lang ?? nothing}
+    style=${style ?? nothing}
+    .formatOptions=${formatOptions}
+  >
+    ${label
+      ? html`
+          <span slot="label">${label}</span>
+        `
+      : nothing}
+    ${description
+      ? html`
+          <span slot="description">${description}</span>
+        `
+      : nothing}
+  </swc-meter>
+`;
+
+// Every size and variant (each independent of the other, since size only
+// scales thickness/font-size and variant only swaps the fill color — no
+// interaction effect to cross-check), both label positions, the CSS-visible
+// range edges (0 %, midpoint, 100 %), an over-range value clamped to a full
+// bar while `value-label` still reports the real underlying number, every
+// anatomy combination from the docs Anatomy story (label only, label +
+// description, accessible-label-only fallback, custom value text), the
+// custom-range and format-options behaviors, label wrapping, CJK label
+// rendering (line-height differs under linear-progress-base.css's
+// `:lang(ja/zh/ko)` rule), and static colors on their contrast backgrounds.
+const permutationContent = () => html`
+  ${row(
+    LINEAR_PROGRESS_VALID_SIZES.map((size) =>
+      renderMeter({ size, label: sizeLabels[size] })
+    ),
+    'Sizes'
+  )}
+  ${row(
+    METER_VARIANTS.map((variant) =>
+      renderMeter({ variant, label: variantLabels[variant] })
+    ),
+    'Variants'
+  )}
+  ${row(
+    LINEAR_PROGRESS_LABEL_POSITIONS.map((labelPosition) =>
+      renderMeter({
+        labelPosition,
+        label: labelPositionLabels[labelPosition],
+      })
+    ),
+    'Label position'
+  )}
+  ${row(
+    [
+      renderMeter({ value: 0, label: '0%' }),
+      renderMeter({ value: 25, label: '25%' }),
+      renderMeter({ value: 50, label: '50%' }),
+      renderMeter({ value: 75, label: '75%' }),
+      renderMeter({ value: 100, label: '100%' }),
+      renderMeter({
+        value: 150,
+        maxValue: 100,
+        label: 'Over 100%',
+        valueLabel: '150%',
+      }),
+    ],
+    'Values'
+  )}
+  ${row(
+    [
+      renderMeter({ value: 40, label: 'Label only' }),
+      renderMeter({
+        value: 40,
+        label: 'Label and description',
+        description: 'Additional context below the bar',
+      }),
+      renderMeter({ value: 40, accessibleLabel: 'Screen-reader-only label' }),
+      renderMeter({
+        value: 40,
+        label: 'Custom value text',
+        valueLabel: '1 of 4',
+      }),
+    ],
+    'Anatomy'
+  )}
+  ${row(
+    [
+      renderMeter({
+        minValue: 0,
+        maxValue: 10,
+        value: 3,
+        label: 'Custom range',
+        valueLabel: '3 of 10',
+      }),
+      renderMeter({
+        value: 42,
+        label: 'Format options',
+        formatOptions: { style: 'currency', currency: 'USD' },
+      }),
+    ],
+    'Behaviors'
+  )}
+  ${row(
+    [
+      renderMeter({
+        label:
+          'A label long enough to wrap onto multiple lines within the available inline space',
+        style: 'max-inline-size: 200px;',
+      }),
+    ],
+    'Wrapping'
+  )}
+  ${row(
+    [
+      renderMeter({ lang: 'ja', label: '承認ワークフローの進行状況' }),
+      renderMeter({ lang: 'ko', label: '승인 워크플로 진행 상황' }),
+      renderMeter({ lang: 'zh', label: '审批工作流进度' }),
+    ],
+    'CJK language'
+  )}
+  ${LINEAR_PROGRESS_STATIC_COLORS.map((staticColor) =>
+    staticColorBackground(
+      row(
+        [
+          renderMeter({ staticColor, label: staticColorLabels[staticColor] }),
+          renderMeter({
+            staticColor,
+            labelPosition: 'side',
+            label: `${staticColorLabels[staticColor]} · side label`,
+          }),
+        ],
+        staticColorLabels[staticColor]
+      ),
+      staticColor
+    )
+  )}
+`;
+
+// VRT stories
+
+export const Permutations: Story = {
+  render: () => html`
+    ${theme(permutationContent(), 'light', 'ltr')}
+    ${theme(permutationContent(), 'dark', 'rtl')}
+  `,
+  parameters: vrtParameters,
+};
+
+export const ForcedColors: Story = {
+  render: () => theme(permutationContent(), 'light', 'ltr'),
+  parameters: forcedColorsVrtParameters,
+};