Fix a bug where no tags would return an empty tag while searching

search/src/main/kotlin/FieldConverters.kt

@@ -22,5 +22,5 @@ internal object UuidFieldConverter : FieldConverter<UUID> {
 
 internal object TagsFieldConverter : FieldConverter<List<String>> {
     override fun toDoc(value: List<String>): String = value.joinToString(" ")
-    override fun fromDoc(value: String): List<String> = value.split(" ")
+    override fun fromDoc(value: String): List<String> = value.split(" ").filter(String::isNotEmpty)
 }

search/src/test/kotlin/TagsFieldConverterTest.kt

@@ -0,0 +1,26 @@
+package be.simplenotes.search
+
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.MethodSource
+import java.util.stream.Stream
+
+internal class TagsFieldConverterTest {
+
+    @Suppress("unused")
+    fun tags(): Stream<List<String>> = Stream.of(
+        listOf("example"),
+        listOf("example", "second"),
+        listOf(),
+    )
+
+    @ParameterizedTest
+    @MethodSource("tags")
+    fun `tags should stay the same`(input: List<String>) {
+        val doc = TagsFieldConverter.toDoc(input)
+        val out = TagsFieldConverter.fromDoc(doc)
+        assertThat(out)
+            .hasSameSizeAs(input)
+            .containsExactlyInAnyOrderElementsOf(input)
+    }
+}