elimu-ai#1396 Created CsvSoundExtractionHelperTest with basic test cases

src/test/java/ai/elimu/util/csv/CsvSoundExtractionHelperTest.java

@@ -0,0 +1,50 @@
+package ai.elimu.util.csv;
+
+import ai.elimu.model.content.Sound;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.util.List;
+
+import static ai.elimu.util.csv.CsvSoundExtractionHelper.getSoundsFromCsvBackup;
+import static java.util.Collections.emptyList;
+import static org.junit.Assert.assertEquals;
+
+public class CsvSoundExtractionHelperTest {
+
+    private static final String HEADERS_LINE = "id,value_ipa,audio_id,diacritic,sound_type,usage_count";
+
+    @Rule
+    public TemporaryFolder folder = new TemporaryFolder();
+
+    private File soundsCsv;
+
+    @Before
+    public void setUp() throws Exception {
+        soundsCsv = folder.newFile("sounds.csv");
+    }
+
+    @Test
+    public void extracted_empty_sounds_for_csv_file_with_empty_content() {
+        List<Sound> soundsFromCsvBackup = getSoundsFromCsvBackup(soundsCsv);
+
+        assertEquals(emptyList(), soundsFromCsvBackup);
+    }
+
+    @Test
+    public void extracted_empty_sounds_for_csv_file_only_with_headers() throws Exception {
+        Files.writeString(
+            soundsCsv.toPath(),
+            HEADERS_LINE
+        );
+
+        List<Sound> soundsFromCsvBackup = getSoundsFromCsvBackup(soundsCsv);
+
+        assertEquals(emptyList(), soundsFromCsvBackup);
+    }
+
+}