Move the logic from main.rs to make it testable

3 files changed, 82 insertions, 30 deletions

diff --git a/src/cli.rs b/src/cli.rs
index 4525781..b9f30fa 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -71,9 +71,9 @@ mod tests {
     use std::path::PathBuf;
 
     use clap::Parser;
-    use repo2markdown::logger::Verbosity;
+    use repo2markdown::{logger::Verbosity, renderer::RenderOptions};
 
-    use super::{Cli, RenderOptions};
+    use super::Cli;
 
     #[test]
     fn cli_uses_default_paths_and_normal_verbosity() {
diff --git a/src/main.rs b/src/main.rs
index 0cb672f..3a89188 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,14 +1,11 @@
 mod cli;
+mod run;
 
 use std::io;
 
 use clap::Parser;
-use repo2markdown::{
-    fenced_md_generator::generate_fenced_markdown, logger::Logger,
-    md_generator::generate_markdown_from_paths,
-};
 
-use crate::cli::Cli;
+use crate::{cli::Cli, run::run};
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let cli = Cli::parse();
@@ -16,27 +13,5 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     let stdin = io::stdin();
     let stdout = io::stdout();
 
-    let logger = Logger::new(cli.verbosity());
-
-    if cli.fenced {
-        generate_fenced_markdown(
-            stdin.lock(),
-            stdout.lock(),
-            cli.render_options(),
-            &cli.root,
-            &cli.origin,
-            cli.name.as_deref(),
-            logger,
-        )
-    } else {
-        generate_markdown_from_paths(
-            stdin.lock(),
-            stdout.lock(),
-            cli.render_options(),
-            &cli.root,
-            &cli.origin,
-            cli.name.as_deref(),
-            logger,
-        )
-    }
+    run(&cli, stdin.lock(), stdout.lock())
 }
diff --git a/src/run.rs b/src/run.rs
new file mode 100644
index 0000000..e9a32c2
--- /dev/null
+++ b/src/run.rs
@@ -0,0 +1,77 @@
+use std::io::{Read, Write};
+
+use repo2markdown::{
+    fenced_md_generator::generate_fenced_markdown, logger::Logger,
+    md_generator::generate_markdown_from_paths,
+};
+
+use crate::cli::Cli;
+
+pub fn run<R: Read, W: Write>(
+    cli: &Cli,
+    input: R,
+    output: W,
+) -> Result<(), Box<dyn std::error::Error>> {
+    let logger = Logger::new(cli.verbosity());
+
+    if cli.fenced {
+        generate_fenced_markdown(
+            input,
+            output,
+            cli.render_options(),
+            &cli.root,
+            &cli.origin,
+            cli.name.as_deref(),
+            logger,
+        )
+    } else {
+        generate_markdown_from_paths(
+            input,
+            output,
+            cli.render_options(),
+            &cli.root,
+            &cli.origin,
+            cli.name.as_deref(),
+            logger,
+        )
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::io::Cursor;
+
+    use clap::Parser;
+
+    use crate::cli::Cli;
+
+    use super::run;
+
+    #[test]
+    fn run_does_not_fence_output_by_default() {
+        let cli = Cli::try_parse_from(["repo2markdown", "--name", "Project name"]).unwrap();
+
+        let input = Cursor::new(b"");
+        let mut output = Vec::new();
+
+        run(&cli, input, &mut output).unwrap();
+
+        assert_eq!(String::from_utf8(output).unwrap(), "# Project name\n");
+    }
+
+    #[test]
+    fn run_uses_fenced_output_when_requested() {
+        let cli =
+            Cli::try_parse_from(["repo2markdown", "--fenced", "--name", "Project name"]).unwrap();
+
+        let input = Cursor::new(b"");
+        let mut output = Vec::new();
+
+        run(&cli, input, &mut output).unwrap();
+
+        assert_eq!(
+            String::from_utf8(output).unwrap(),
+            "```markdown\n# Project name\n```\n"
+        );
+    }
+}