Add unit test for country code converter

backend/src/test/kotlin/fr/gouv/cnsp/monitorfish/infrastructure/database/entities/converters/CountryCodeConverterUTests.kt

@@ -0,0 +1,54 @@
+package fr.gouv.cnsp.monitorfish.infrastructure.database.entities.converters
+
+import com.neovisionaries.i18n.CountryCode
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Test
+
+class CountryCodeConverterUTests {
+    private val converter = CountryCodeConverter()
+
+    @Test
+    fun `convertToDatabaseColumn should return enum name`() {
+        // When
+        val result = converter.convertToDatabaseColumn(CountryCode.US)
+
+        // Then
+        assertThat(result).isEqualTo("US")
+    }
+
+    @Test
+    fun `convertToDatabaseColumn should return null for null attribute`() {
+        // When
+        val result = converter.convertToDatabaseColumn(null)
+
+        // Then
+        assertThat(result).isEqualTo(null)
+    }
+
+    @Test
+    fun `convertToEntityAttribute should return enum for valid dbData`() {
+        // When
+        val result = converter.convertToEntityAttribute("US")
+
+        // Then
+        assertThat(result).isEqualTo(CountryCode.US)
+    }
+
+    @Test
+    fun `convertToEntityAttribute should return UNDEFINED for invalid dbData`() {
+        // When
+        val result = converter.convertToEntityAttribute("INVALID_CODE")
+
+        // Then
+        assertThat(result).isEqualTo(CountryCode.UNDEFINED)
+    }
+
+    @Test
+    fun `convertToEntityAttribute should return UNDEFINED for null dbData`() {
+        // When
+        val result = converter.convertToEntityAttribute(null)
+
+        // Then
+        assertThat(result).isEqualTo(CountryCode.UNDEFINED)
+    }
+}