testCommandWhenNoADRsCreated

src/test/java/org/doble/adr/CommandGenerateTocTest.java

@@ -3,6 +3,8 @@
 import java.nio.file.FileSystems;
 import java.nio.file.Files;
 import java.nio.file.Path;
+
+import org.hamcrest.Matcher;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -222,8 +224,56 @@ void testCommandWithNonExistingTemplateFile() {
 	}
 
 	@Test
-	void testCommandWhenNoADRsCreated() {
-		fail("TO DO");
+	void testCommandWhenNoADRsCreated() throws Exception {
+
+		// Remove all ADRS
+		Path adrPath = tempDir.resolve("project/doc/adr");
+		TestUtilities.removeAllFilesInDirectory(adrPath);
+
+		// Create a template for test
+		String testTemplateContent = """
+				# ADR files
+				Test empty TOC
+
+				## Entries
+				{{#entries}}
+				* ADR {{id}} : {{filename}}
+				{{/entries}}
+				End of entries
+				""";
+
+		Path testTemplatePath = tempDir.resolve(templatesPath).resolve("test_template.md");
+		Files.createFile(testTemplatePath);
+		Files.writeString(testTemplatePath, testTemplateContent);
+
+		String[] args = { "generate", "toc", "-t", testTemplatePath.toString() };
+
+		int exitCode = ADR.run(args, env);
+		assertEquals(0, exitCode);
+
+		Path tocPath = tempDir.resolve("project/doc/adr/toc.md");
+
+		// Check if the TOC file has been created
+		assertTrue(Files.exists(tocPath));
+
+		// Sample check the expected contents
+		String expectedSample1 = "Test empty TOC";
+		String actual = Files.readString(tocPath);
+
+		assert (actual.contains(expectedSample1));
+
+		// Use a regex to extract the content between the string "##Entries" and "End of
+		// entries"
+		String regex = "## Entries(.*?)End of entries";
+		java.util.regex.Pattern pattern = java.util.regex.Pattern.compile(regex, java.util.regex.Pattern.DOTALL);
+		java.util.regex.Matcher matcher = pattern.matcher(actual);
+
+		if (matcher.find()) {
+			assertEquals("", matcher.group(1).trim()); // Extract the content between the markers
+		} else {
+			fail("TOC entries is not empty: " + matcher.group(1).trim());
+		}
+
 	}
 
 }

src/test/java/org/doble/adr/TestUtilities.java

@@ -3,14 +3,14 @@
 import static org.junit.jupiter.api.Assertions.fail;
 
 import java.io.IOException;
-import java.nio.file.FileSystem;
-import java.nio.file.Files;
-import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
+import java.io.IOException;
+import java.nio.file.*;
+import java.nio.file.attribute.BasicFileAttributes;
 
 public class TestUtilities {
 
@@ -179,4 +179,37 @@ public static String trimContent(String input) {
 
 		return result.toString();
 	}
+
+	/**
+	 * 
+	 * Removes all files (and NOT directories) in a specified directory.
+	 * The function throws an exception if the provided path is not a valid
+	 * directory.
+	 */
+
+	public static void removeAllFilesInDirectory(Path directory) throws IOException {
+
+		// Ensure the directory exists
+		if (!Files.isDirectory(directory)) {
+			throw new IllegalArgumentException("The provided path is not a directory.");
+		}
+
+		// Use Files.walkFileTree to iterate over the files
+		Files.walkFileTree(directory, new SimpleFileVisitor<Path>() {
+			@Override
+			public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+				// Delete each file
+				Files.delete(file);
+				return FileVisitResult.CONTINUE;
+			}
+
+			@Override
+			public FileVisitResult visitFileFailed(Path file, IOException exc) throws IOException {
+				// Handle file visit failure (e.g., permission issues)
+				System.err.println("Failed to access file: " + file + " due to " + exc.getMessage());
+				return FileVisitResult.CONTINUE;
+			}
+		});
+	}
+
 }