Create FileExtensionFilterTest.java

Author: mercyblitz

microsphere-java-core/src/test/java/io/microsphere/io/filter/FileExtensionFilterTest.java

@@ -0,0 +1,52 @@
+package io.microsphere.io.filter;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.io.IOException;
+
+import static io.microsphere.io.filter.DirectoryFileFilter.INSTANCE;
+import static io.microsphere.io.filter.FileExtensionFilter.of;
+import static io.microsphere.util.SystemUtils.JAVA_HOME;
+import static io.microsphere.util.SystemUtils.JAVA_IO_TMPDIR;
+import static io.microsphere.util.SystemUtils.USER_DIR;
+import static java.io.File.createTempFile;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * {@link FileExtensionFilter} Test
+ *
+ * @author <a href="mailto:mercyblitz@gmail.com">Mercy</a>
+ * @see FileExtensionFilter
+ * @since 1.0.0
+ */
+class FileExtensionFilterTest {
+
+    private FileExtensionFilter instance;
+
+    @BeforeEach
+    public void init() {
+        instance = of("txt");
+    }
+
+    @Test
+    public void testAcceptOnNull() {
+        assertFalse(instance.accept(null));
+    }
+
+    @Test
+    public void testAcceptOnDirectory() {
+        assertFalse(instance.accept(new File(JAVA_HOME)));
+        assertFalse(instance.accept(new File(USER_DIR)));
+        assertFalse(instance.accept(new File(JAVA_IO_TMPDIR)));
+    }
+
+    @Test
+    public void testAcceptOnFile() throws IOException {
+        File testFile = createTempFile("test", ".txt");
+        assertTrue(instance.accept(testFile));
+        testFile.deleteOnExit();
+    }
+}