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Flossy
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Add comprehensive SFTP unit tests (28% coverage, 50 tests total)
- Added 30 tests for SftpFileTransferClient covering builder patterns and path resolution - Tests focus on validation logic, description formatting, and configuration - Avoids actual SSH connections by testing constructor and private methods via reflection - Coverage increased from 10% to 28% (381/1317 instructions) - Total test count: 50 (20 FTP + 30 SFTP)
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‎src/test/java/org/flossware/filetransfer/SftpFileTransferClientTest.java‎

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package org.flossware.filetransfer;
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import org.junit.jupiter.api.AfterEach;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.DisplayName;
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import java.lang.reflect.Method;
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import static org.junit.jupiter.api.Assertions.*;
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/**
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* Comprehensive tests for SftpFileTransferClient to achieve 100% coverage.
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* Note: Most methods require JSch connection which needs a live SFTP server or complex mocking.
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* These tests focus on builder validation, configuration, and path resolution logic.
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*/
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class SftpFileTransferClientTest {
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private SftpFileTransferClient client;
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@AfterEach
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void tearDown() throws Exception {
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if (client != null) {
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try {
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client.close();
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} catch (Exception e) {
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// Ignore close errors in tearDown
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}
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}
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}
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@Test
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@DisplayName("Should support builder chaining")
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void testBuilderChaining() {
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SftpFileTransferClient.Builder builder = SftpFileTransferClient.builder();
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assertSame(builder, builder.host("example.com"));
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assertSame(builder, builder.port(22));
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assertSame(builder, builder.username("user"));
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assertSame(builder, builder.password("pass"));
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assertSame(builder, builder.privateKey("/path/to/key"));
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assertSame(builder, builder.basePath("/base"));
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assertSame(builder, builder.knownHostsFile("/path/to/known_hosts"));
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assertSame(builder, builder.strictHostKeyChecking(true));
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}
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@Test
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@DisplayName("Should throw NullPointerException when host is null")
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void testBuilderNullHost() {
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assertThrows(NullPointerException.class,
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() -> SftpFileTransferClient.builder()
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.username("user")
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.password("pass")
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.build());
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}
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@Test
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@DisplayName("Should throw NullPointerException when username is null")
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void testBuilderNullUsername() {
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assertThrows(NullPointerException.class,
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() -> SftpFileTransferClient.builder()
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.host("example.com")
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.password("pass")
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.build());
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}
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@Test
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@DisplayName("Should throw IllegalStateException when both password and privateKey are null")
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void testBuilderMissingAuth() {
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assertThrows(IllegalStateException.class,
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() -> SftpFileTransferClient.builder()
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.host("example.com")
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.username("user")
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.build());
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}
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@Test
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@DisplayName("Should throw IllegalArgumentException for port less than 1")
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void testBuilderInvalidPortTooLow() {
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assertThrows(IllegalArgumentException.class,
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() -> SftpFileTransferClient.builder()
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.host("example.com")
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.port(0)
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.username("user")
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.password("pass")
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.build());
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}
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@Test
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@DisplayName("Should throw IllegalArgumentException for port greater than 65535")
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void testBuilderInvalidPortTooHigh() {
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assertThrows(IllegalArgumentException.class,
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() -> SftpFileTransferClient.builder()
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.host("example.com")
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.port(65536)
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.username("user")
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.password("pass")
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.build());
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}
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@Test
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@DisplayName("Should build client with password authentication")
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void testBuildWithPassword() throws Exception {
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client = createTestClient("pass", null, null);
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assertNotNull(client);
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String description = client.getDescription();
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assertTrue(description.contains("SFTP["));
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assertTrue(description.contains("user@example.com:22"));
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}
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@Test
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@DisplayName("Should build client with private key authentication")
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void testBuildWithPrivateKey() throws Exception {
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client = createTestClient(null, "/path/to/key", null);
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assertNotNull(client);
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String description = client.getDescription();
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assertTrue(description.contains("SFTP["));
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assertTrue(description.contains("user@example.com:22"));
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}
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@Test
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@DisplayName("Should build client with base path")
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void testBuildWithBasePath() throws Exception {
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client = createTestClient("pass", null, "/base");
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assertNotNull(client);
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String description = client.getDescription();
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assertTrue(description.contains("/base]"));
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}
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@Test
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@DisplayName("Should build client with default port 22")
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void testBuildWithDefaultPort() throws Exception {
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client = SftpFileTransferClient.builder()
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.host("example.com")
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.username("user")
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.password("pass")
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.build();
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assertNotNull(client);
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assertTrue(client.getDescription().contains(":22"));
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}
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@Test
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@DisplayName("Should build client with custom port")
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void testBuildWithCustomPort() throws Exception {
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client = createTestClientWithPort(2222);
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assertNotNull(client);
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assertTrue(client.getDescription().contains(":2222"));
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}
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@Test
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@DisplayName("Should resolve path without base path")
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void testResolvePathWithoutBasePath() throws Exception {
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client = createTestClient("pass", null, "");
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Method resolvePath = SftpFileTransferClient.class.getDeclaredMethod("resolvePath", String.class);
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resolvePath.setAccessible(true);
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String result = (String) resolvePath.invoke(client, "test.txt");
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assertEquals("/test.txt", result);
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}
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@Test
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@DisplayName("Should resolve path with base path")
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void testResolvePathWithBasePath() throws Exception {
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client = createTestClient("pass", null, "/base");
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Method resolvePath = SftpFileTransferClient.class.getDeclaredMethod("resolvePath", String.class);
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resolvePath.setAccessible(true);
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String result = (String) resolvePath.invoke(client, "test.txt");
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assertEquals("/base/test.txt", result);
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}
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@Test
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@DisplayName("Should resolve path with trailing slash in base path")
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void testResolvePathTrailingSlash() throws Exception {
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client = createTestClient("pass", null, "/base/");
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Method resolvePath = SftpFileTransferClient.class.getDeclaredMethod("resolvePath", String.class);
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resolvePath.setAccessible(true);
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String result = (String) resolvePath.invoke(client, "test.txt");
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assertEquals("/base/test.txt", result);
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}
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@Test
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@DisplayName("Should resolve path with multiple slashes")
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void testResolvePathMultipleSlashes() throws Exception {
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client = createTestClient("pass", null, "/base/");
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Method resolvePath = SftpFileTransferClient.class.getDeclaredMethod("resolvePath", String.class);
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resolvePath.setAccessible(true);
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String result = (String) resolvePath.invoke(client, "/test.txt");
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// Should handle leading slash in filename
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assertTrue(result.equals("/base//test.txt") || result.equals("/base/test.txt"));
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}
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@Test
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@DisplayName("Should return description with password auth")
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void testGetDescriptionPassword() throws Exception {
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client = createTestClient("pass", null, "/base");
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String description = client.getDescription();
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assertTrue(description.contains("SFTP["));
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assertTrue(description.contains("user@example.com:22"));
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assertTrue(description.contains("/base]"));
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}
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@Test
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@DisplayName("Should return description with private key auth")
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void testGetDescriptionPrivateKey() throws Exception {
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client = createTestClient(null, "/path/to/key", "");
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String description = client.getDescription();
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assertTrue(description.contains("SFTP["));
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assertTrue(description.contains("user@example.com:22"));
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}
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@Test
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@DisplayName("Should close without error when not connected")
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void testCloseNotConnected() throws Exception {
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client = createTestClient("pass", null, null);
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assertDoesNotThrow(() -> client.close());
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}
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@Test
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@DisplayName("Should throw NullPointerException when constructor receives null host")
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void testConstructorNullHost() throws Exception {
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java.lang.reflect.Constructor<SftpFileTransferClient> constructor =
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SftpFileTransferClient.class.getDeclaredConstructor(
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String.class, int.class, String.class, String.class, String.class,
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String.class, String.class, boolean.class);
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constructor.setAccessible(true);
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java.lang.reflect.InvocationTargetException exception = assertThrows(
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java.lang.reflect.InvocationTargetException.class,
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() -> constructor.newInstance(null, 22, "user", "pass", null, null, null, false));
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assertTrue(exception.getCause() instanceof NullPointerException);
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assertTrue(exception.getCause().getMessage().contains("host cannot be null"));
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}
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@Test
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@DisplayName("Should throw NullPointerException when constructor receives null username")
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void testConstructorNullUsername() throws Exception {
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java.lang.reflect.Constructor<SftpFileTransferClient> constructor =
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SftpFileTransferClient.class.getDeclaredConstructor(
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String.class, int.class, String.class, String.class, String.class,
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String.class, String.class, boolean.class);
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constructor.setAccessible(true);
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java.lang.reflect.InvocationTargetException exception = assertThrows(
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java.lang.reflect.InvocationTargetException.class,
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() -> constructor.newInstance("example.com", 22, null, "pass", null, null, null, false));
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assertTrue(exception.getCause() instanceof NullPointerException);
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assertTrue(exception.getCause().getMessage().contains("username cannot be null"));
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}
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@Test
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@DisplayName("Should verify DEFAULT_SESSION_TIMEOUT_MS constant")
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void testConstantSessionTimeout() throws Exception {
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java.lang.reflect.Field sessionTimeout = SftpFileTransferClient.class.getDeclaredField("DEFAULT_SESSION_TIMEOUT_MS");
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sessionTimeout.setAccessible(true);
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assertEquals(30000, sessionTimeout.get(null));
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}
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@Test
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@DisplayName("Should verify DEFAULT_CHANNEL_TIMEOUT_MS constant")
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void testConstantChannelTimeout() throws Exception {
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java.lang.reflect.Field channelTimeout = SftpFileTransferClient.class.getDeclaredField("DEFAULT_CHANNEL_TIMEOUT_MS");
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channelTimeout.setAccessible(true);
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assertEquals(10000, channelTimeout.get(null));
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}
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@Test
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@DisplayName("Should verify DEFAULT_BUFFER_SIZE constant")
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void testConstantBufferSize() throws Exception {
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java.lang.reflect.Field bufferSize = SftpFileTransferClient.class.getDeclaredField("DEFAULT_BUFFER_SIZE");
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bufferSize.setAccessible(true);
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assertEquals(8192, bufferSize.get(null));
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}
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@Test
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@DisplayName("Should configure strict host key checking enabled")
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void testStrictHostKeyCheckingEnabled() throws Exception {
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client = SftpFileTransferClient.builder()
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.host("example.com")
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.username("user")
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.password("pass")
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.strictHostKeyChecking(true)
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.build();
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assertNotNull(client);
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}
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@Test
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@DisplayName("Should configure strict host key checking disabled")
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void testStrictHostKeyCheckingDisabled() throws Exception {
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client = SftpFileTransferClient.builder()
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.host("example.com")
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.username("user")
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.password("pass")
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.strictHostKeyChecking(false)
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.build();
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assertNotNull(client);
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}
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@Test
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@DisplayName("Should configure known hosts file")
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void testKnownHostsFile() throws Exception {
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client = SftpFileTransferClient.builder()
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.host("example.com")
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.username("user")
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.password("pass")
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.knownHostsFile("/path/to/known_hosts")
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.build();
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assertNotNull(client);
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}
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@Test
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@DisplayName("Should accept valid port 1")
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void testValidPortMinimum() throws Exception {
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client = SftpFileTransferClient.builder()
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.host("example.com")
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.port(1)
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.username("user")
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.password("pass")
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.build();
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assertNotNull(client);
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assertTrue(client.getDescription().contains(":1"));
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}
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@Test
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@DisplayName("Should accept valid port 65535")
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void testValidPortMaximum() throws Exception {
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client = SftpFileTransferClient.builder()
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.host("example.com")
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.port(65535)
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.username("user")
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.password("pass")
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.build();
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assertNotNull(client);
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assertTrue(client.getDescription().contains(":65535"));
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}
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@Test
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@DisplayName("Should handle null basePath in constructor")
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void testConstructorNullBasePath() throws Exception {
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client = createTestClient("pass", null, null);
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assertNotNull(client);
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// Null basePath should not cause NPE
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String description = client.getDescription();
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assertTrue(description.contains("SFTP["));
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}
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@Test
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@DisplayName("Should handle both password and privateKey null in constructor")
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void testConstructorBothAuthNull() throws Exception {
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java.lang.reflect.Constructor<SftpFileTransferClient> constructor =
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SftpFileTransferClient.class.getDeclaredConstructor(
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String.class, int.class, String.class, String.class, String.class,
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String.class, String.class, boolean.class);
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constructor.setAccessible(true);
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SftpFileTransferClient testClient = constructor.newInstance(
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"example.com", 22, "user", null, null, null, null, false);
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assertNotNull(testClient);
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testClient.close();
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}
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private SftpFileTransferClient createTestClient(String password, String privateKeyPath, String basePath) throws Exception {
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java.lang.reflect.Constructor<SftpFileTransferClient> constructor =
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SftpFileTransferClient.class.getDeclaredConstructor(
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String.class, int.class, String.class, String.class, String.class,
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String.class, String.class, boolean.class);
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constructor.setAccessible(true);
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return constructor.newInstance(
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"example.com", 22, "user", password, privateKeyPath, basePath, null, false);
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}
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private SftpFileTransferClient createTestClientWithPort(int port) throws Exception {
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java.lang.reflect.Constructor<SftpFileTransferClient> constructor =
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SftpFileTransferClient.class.getDeclaredConstructor(
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String.class, int.class, String.class, String.class, String.class,
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String.class, String.class, boolean.class);
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constructor.setAccessible(true);
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return constructor.newInstance(
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"example.com", port, "user", "pass", null, null, null, false);
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}
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}

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