guided scan zone

app/src/test/java/com/clean/scanner/ui/ScannerViewModelTest.kt

@@ -50,7 +50,7 @@ class ScannerViewModelTest {
         viewModel.onScan(result)
         viewModel.resumeScanning()
 
-        now = 2_000L
+        now = 4_000L
         viewModel.onScan(result)
         advanceUntilIdle()
 
@@ -75,7 +75,7 @@ class ScannerViewModelTest {
         now = 2_000L
         viewModel.onScan(ScanResult(content = "B", type = "Text"))
 
-        now = 3_000L
+        now = 3_600L
         viewModel.onScan(ScanResult(content = "A", type = "Text"))
         advanceUntilIdle()
 
@@ -92,4 +92,27 @@ class ScannerViewModelTest {
         assertTrue(viewModel.uiState.value.batchResults.isEmpty())
         assertEquals(3, saved.size)
     }
+
+    @Test
+    fun sameCodeWithinHoldoff_isIgnored() = runTest {
+        val saved = mutableListOf<Pair<String, String>>()
+        var now = 1_000L
+        val viewModel = ScannerViewModel(
+            saveScan = { content, type -> saved += content to type },
+            nowProvider = { now }
+        )
+
+        val result = ScanResult(content = "HOLD", type = "Text")
+        viewModel.setBatchMode(true)
+        viewModel.onScan(result)
+
+        now = 2_000L
+        viewModel.onScan(result)
+        advanceUntilIdle()
+
+        val state = viewModel.uiState.value
+        assertEquals(1, state.scanFeedbackNonce)
+        assertEquals(1, saved.size)
+        assertEquals(1, state.batchResults.size)
+    }
 }