fix(theme): complete color and component contrast contracts (#1417)

2026-09-30 21:14:56 +03:00
1 parent 9529a7e32c
commit 56bb3a88c2
@@ -0,0 +1,64 @@
+package com.m57.hermescontrol.theme
+
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.luminance
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/** Enabled-state contract for the pinned Material 3 defaults, verified again by the device gallery. */
+class ThemeComponentContrastTest {
+    @Test
+    fun everyResolvedPresetSupportsEnabledComponentStates() {
+        ThemeRegistry.forEach { (preset, _) ->
+            listOf(true, false).forEach { dark ->
+                val c = resolveColorScheme(preset, dark)
+                // PR #1417: these are component-state combinations, not just on-color pairs.
+                val graphics =
+                    listOf(
+                        "switch on thumb/track" to (c.onPrimary to c.primary),
+                        "switch on track/surface" to (c.primary to c.surface),
+                        "switch off thumb/track" to (c.outline to c.surfaceContainerHighest),
+                        "switch off border/surface" to (c.outline to c.surface),
+                        "radio selected/surface" to (c.primary to c.surface),
+                        "radio unselected/surface" to (c.onSurfaceVariant to c.surface),
+                        "checkbox selected/surface" to (c.primary to c.surface),
+                        "checkbox checkmark/box" to (c.onPrimary to c.primary),
+                        "checkbox unselected/surface" to (c.onSurfaceVariant to c.surface),
+                        "slider active/inactive" to (c.primary to c.secondaryContainer),
+                        "field normal border/surface" to (c.outline to c.surface),
+                        "field focused border/surface" to (c.primary to c.surface),
+                        "field error border/surface" to (c.error to c.surface),
+                        "segment selected border/container" to (c.outline to c.secondaryContainer),
+                        "segment unselected border/surface" to (c.outline to c.surface),
+                    )
+                val text =
+                    listOf(
+                        "primary foreground/surface" to (c.primary to c.surface),
+                        "primary foreground/background" to (c.primary to c.background),
+                        "error foreground/surface" to (c.error to c.surface),
+                        "error foreground/background" to (c.error to c.background),
+                        "field normal label/surface" to (c.onSurfaceVariant to c.surface),
+                        "field focused label/surface" to (c.primary to c.surface),
+                        "field error label/surface" to (c.error to c.surface),
+                        "segment selected content/container" to (c.onSecondaryContainer to c.secondaryContainer),
+                        "segment unselected content/surface" to (c.onSurface to c.surface),
+                    )
+                graphics.forEach { (name, pair) -> checkPair(preset, dark, name, pair, 3f) }
+                text.forEach { (name, pair) -> checkPair(preset, dark, name, pair, 4.5f) }
+            }
+        }
+    }
+
+    private fun checkPair(
+        preset: ThemePreset,
+        dark: Boolean,
+        name: String,
+        pair: Pair<Color, Color>,
+        minimum: Float,
+    ) {
+        val a = pair.first.luminance()
+        val b = pair.second.luminance()
+        val ratio = (maxOf(a, b) + 0.05f) / (minOf(a, b) + 0.05f)
+        assertTrue("$preset dark=$dark $name is $ratio, expected >= $minimum", ratio >= minimum)
+    }
+}