package com.peachpasswords

import androidx.compose.ui.unit.dp
import org.junit.Assert.assertEquals
import org.junit.Test

class MainActivityTest {

    @Test fun auto_scaling_keeps_phone_and_foldable_behavior() {
        assertEquals(1f, wideScreenScaleFor("auto", 411.dp, 800.dp), 0f)
        assertEquals(1.35f, wideScreenScaleFor("auto", 673.dp, 841.dp), 0f)
    }

    @Test fun auto_scaling_does_not_inflate_tablet_controls() {
        assertEquals(1f, wideScreenScaleFor("auto", 800.dp, 1280.dp), 0f)
        assertEquals(1f, wideScreenScaleFor("auto", 600.dp, 960.dp), 0f)
    }

    @Test fun scale_presets_override_auto_layout_choice() {
        assertEquals(1f, wideScreenScaleFor("compact", 673.dp, 841.dp), 0f)
        assertEquals(1.35f, wideScreenScaleFor("large", 800.dp, 1280.dp), 0f)
    }

    /**
     * On a phone-width window every preset lands on the same scale, so the
     * persisted preference arriving after the default cannot change it. Only a
     * tablet-like window makes "auto" and "large" disagree, which is what let
     * the re-scale tear down the nav host on a foldable's inner screen.
     */
    @Test fun every_preset_agrees_on_a_phone_screen() {
        assertEquals(
            wideScreenScaleFor("auto", 385.dp, 914.dp),
            wideScreenScaleFor("large", 385.dp, 914.dp),
            0f,
        )
        assertEquals(1f, wideScreenScaleFor("large", 385.dp, 914.dp), 0f)
    }
}