feat: surface /api/status memory+disk pressure on connect/status screens (#903) (#908)

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

app/src/test/java/com/m57/hermescontrol/ui/common/PressureBannerTest.kt

@@ -0,0 +1,108 @@
+package com.m57.hermescontrol.ui.common
+
+import com.m57.hermescontrol.data.model.DiskPressureStatus
+import com.m57.hermescontrol.data.model.MemoryPressureStatus
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Test
+
+class PressureBannerTest {
+    private fun mem(
+        pressure: String? = null,
+        suspectedOom: Boolean? = null,
+    ) = MemoryPressureStatus(
+        pressure = pressure,
+        last_boot_suspected_oom = suspectedOom,
+    )
+
+    private fun disk(pressure: String? = null) = DiskPressureStatus(pressure = pressure)
+
+    @Test
+    fun noTrigger_whenOkUnknownOrNull() {
+        assertNull(selectPressureTrigger(null, null))
+        assertNull(selectPressureTrigger(mem("ok"), disk("ok")))
+        assertNull(selectPressureTrigger(mem("unknown"), disk("unknown")))
+        assertNull(selectPressureTrigger(mem(), disk()))
+    }
+
+    @Test
+    fun diskCritical_outranksEverything() {
+        assertEquals(
+            PressureTrigger.DISK_CRITICAL,
+            selectPressureTrigger(mem("critical"), disk("critical")),
+        )
+        assertEquals(
+            PressureTrigger.DISK_CRITICAL,
+            selectPressureTrigger(mem("critical", suspectedOom = true), disk("critical")),
+        )
+        assertEquals(
+            PressureTrigger.DISK_CRITICAL,
+            selectPressureTrigger(mem("elevated"), disk("critical")),
+        )
+    }
+
+    @Test
+    fun memoryCritical_outranksOomAndElevated() {
+        assertEquals(
+            PressureTrigger.MEMORY_CRITICAL,
+            selectPressureTrigger(mem("critical", suspectedOom = true), disk("elevated")),
+        )
+        assertEquals(
+            PressureTrigger.MEMORY_CRITICAL,
+            selectPressureTrigger(mem("critical"), disk("elevated")),
+        )
+    }
+
+    @Test
+    fun oomRestart_shownEvenWhenPressureOk() {
+        assertEquals(
+            PressureTrigger.OOM_RESTART,
+            selectPressureTrigger(mem("ok", suspectedOom = true), disk("ok")),
+        )
+        assertEquals(
+            PressureTrigger.OOM_RESTART,
+            selectPressureTrigger(mem("unknown", suspectedOom = true), disk("unknown")),
+        )
+    }
+
+    @Test
+    fun oomRestart_outranksElevatedButNotCritical() {
+        assertEquals(
+            PressureTrigger.OOM_RESTART,
+            selectPressureTrigger(mem("elevated", suspectedOom = true), disk("elevated")),
+        )
+        assertEquals(
+            PressureTrigger.MEMORY_CRITICAL,
+            selectPressureTrigger(mem("critical", suspectedOom = true), disk("elevated")),
+        )
+        assertEquals(
+            PressureTrigger.DISK_CRITICAL,
+            selectPressureTrigger(mem("elevated", suspectedOom = true), disk("critical")),
+        )
+    }
+
+    @Test
+    fun diskElevated_outranksMemoryElevated() {
+        assertEquals(
+            PressureTrigger.DISK_ELEVATED,
+            selectPressureTrigger(mem("elevated"), disk("elevated")),
+        )
+    }
+
+    @Test
+    fun memoryElevated_shownWhenOnlyTrigger() {
+        assertEquals(
+            PressureTrigger.MEMORY_ELEVATED,
+            selectPressureTrigger(mem("elevated"), disk("ok")),
+        )
+        assertEquals(
+            PressureTrigger.DISK_ELEVATED,
+            selectPressureTrigger(mem("ok"), disk("elevated")),
+        )
+    }
+
+    @Test
+    fun oomFlagFalse_doesNotTrigger() {
+        assertNull(selectPressureTrigger(mem("ok", suspectedOom = false), disk("ok")))
+    }
+}