Fix Book tests

Additionally:
- add `chapter` argument to `test.book` command in `Makefile`

Makefile

@@ -105,15 +105,17 @@ endif
 # Run Rust tests of Book.
 #
 # Usage:
-#	make test.book [clean=(no|yes)]
+#	make test.book [chapter=<name>] [clean=(no|yes)]
 
 test.book:
 ifeq ($(clean),yes)
 	cargo clean
 endif
 	$(eval target := $(strip $(shell cargo -vV | sed -n 's/host: //p')))
 	cargo build --all-features --tests
-	OUT_DIR=target mdbook test book -L target/debug/deps $(strip \
+	OUT_DIR='$(realpath .)/target' \
+	mdbook test book $(if $(call eq,$(chapter),),,-c '$(chapter)') \
+		-L target/debug/deps $(strip \
 		$(if $(call eq,$(findstring windows,$(target)),),,\
 			$(shell cargo metadata -q \
 			        | jq -r '.packages[] | select(.name == "windows_$(word 1,$(subst -, ,$(target)))_$(word 4,$(subst -, ,$(target)))") | .manifest_path' \

book/src/output/json.md

@@ -21,7 +21,7 @@ use cucumber::{writer, World as _};
 #
 # #[tokio::main]
 # async fn main() -> io::Result<()> {
-let file = fs::File::create(dbg!(format!("{}/report.json", env!("OUT_DIR"))))?;
+let file = fs::File::create(format!("{}/report.json", env!("OUT_DIR")))?;
 World::cucumber()
     .with_writer(writer::Json::new(file))
     .run("tests/features/book")

book/src/output/junit.md

@@ -21,7 +21,7 @@ use cucumber::{writer, World as _};
 #
 # #[tokio::main]
 # async fn main() -> io::Result<()> {
-let file = fs::File::create(dbg!(format!("{}/junit.xml", env!("OUT_DIR"))))?;
+let file = fs::File::create(format!("{}/junit.xml", env!("OUT_DIR")))?;
 World::cucumber()
     .with_writer(writer::JUnit::new(file, 0))
     .run("tests/features/book")

book/src/output/multiple.md

@@ -109,13 +109,13 @@ World::cucumber()
             writer::Coloring::Auto,
             writer::Verbosity::Default,
         )
-            .tee::<World, _>(writer::Basic::raw(
-                file,
-                writer::Coloring::Never,
-                2,
-            ))
-            .summarized()
-            .normalized(),
+        .tee::<World, _>(writer::Basic::raw(
+            file,
+            writer::Coloring::Never,
+            2,
+        ))
+        .summarized()
+        .normalized(),
     )
     .with_cli(cli) // Supply the parsed `cli::Opts`.
     .run_and_exit("tests/features/book")