From 93b9abaf983b71997e30600513cdda82bc6430ed Mon Sep 17 00:00:00 2001
From: glowcoil <micahrjohnston@gmail.com>
Date: Mon, 1 Apr 2024 20:06:15 -0500
Subject: [PATCH] clap: tests for entry point

---
 src/format/clap/mod.rs   |   3 +
 src/format/clap/tests.rs | 133 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 136 insertions(+)
 create mode 100644 src/format/clap/tests.rs

diff --git a/src/format/clap/mod.rs b/src/format/clap/mod.rs
index fbce96c..2966039 100644
--- a/src/format/clap/mod.rs
+++ b/src/format/clap/mod.rs
@@ -7,6 +7,9 @@ mod gui;
 mod host;
 mod instance;
 
+#[cfg(test)]
+mod tests;
+
 #[doc(hidden)]
 pub use factory::Factory;
 
diff --git a/src/format/clap/tests.rs b/src/format/clap/tests.rs
new file mode 100644
index 0000000..9515f6b
--- /dev/null
+++ b/src/format/clap/tests.rs
@@ -0,0 +1,133 @@
+use std::ffi::{c_char, CStr};
+use std::io::{self, Read, Write};
+
+use crate::buffers::Buffers;
+use crate::editor::{Editor, Parent, Size};
+use crate::events::Events;
+
+use clap_sys::plugin_factory::{clap_plugin_factory, CLAP_PLUGIN_FACTORY_ID};
+use clap_sys::version::CLAP_VERSION;
+
+use crate::host::Host;
+use crate::params::{ParamId, ParamValue};
+use crate::plugin::{Plugin, PluginInfo};
+use crate::process::{Config, Processor};
+
+use super::{ClapInfo, ClapPlugin, Factory};
+
+const NAME: &str = "test plugin";
+const VERSION: &str = "1.2.3";
+const VENDOR: &str = "test vendor";
+const URL: &str = "https://example.com/";
+const EMAIL: &str = "example@example.com";
+const ID: &str = "com.example.plugin";
+
+struct TestPlugin;
+
+impl Plugin for TestPlugin {
+    type Processor = TestProcessor;
+    type Editor = TestEditor;
+
+    fn info() -> PluginInfo {
+        PluginInfo {
+            name: NAME.to_string(),
+            version: VERSION.to_string(),
+            vendor: VENDOR.to_string(),
+            url: URL.to_string(),
+            email: EMAIL.to_string(),
+            buses: Vec::new(),
+            layouts: vec![],
+            params: Vec::new(),
+            has_editor: false,
+        }
+    }
+    fn new(_host: Host) -> Self {
+        TestPlugin
+    }
+    fn set_param(&mut self, _id: ParamId, _value: ParamValue) {}
+    fn get_param(&self, _id: ParamId) -> ParamValue {
+        0.0
+    }
+    fn save(&self, _output: &mut impl Write) -> io::Result<()> {
+        Ok(())
+    }
+    fn load(&mut self, _input: &mut impl Read) -> io::Result<()> {
+        Ok(())
+    }
+    fn processor(&mut self, _config: Config) -> Self::Processor {
+        TestProcessor
+    }
+    fn editor(&mut self, _parent: Parent) -> Self::Editor {
+        TestEditor
+    }
+
+    #[allow(unused_variables)]
+    fn latency(&self, _config: &Config) -> u64 {
+        0
+    }
+}
+
+impl ClapPlugin for TestPlugin {
+    fn clap_info() -> ClapInfo {
+        ClapInfo { id: ID.to_string() }
+    }
+}
+
+struct TestProcessor;
+
+impl Processor for TestProcessor {
+    fn reset(&mut self) {}
+    fn process(&mut self, _buffers: Buffers, _events: Events) {}
+}
+
+struct TestEditor;
+
+impl Editor for TestEditor {
+    fn size(&self) -> Size {
+        Size {
+            width: 0.0,
+            height: 0.0,
+        }
+    }
+    fn param_changed(&mut self, _id: ParamId, _value: ParamValue) {}
+}
+
+unsafe fn str_from_ptr<'a>(ptr: *const c_char) -> Result<&'a str, std::str::Utf8Error> {
+    CStr::from_ptr(ptr).to_str()
+}
+
+#[test]
+fn factory() {
+    let factory = Factory::<TestPlugin>::new();
+
+    let result = unsafe { factory.init() };
+    assert!(result);
+
+    let plugin_factory =
+        unsafe { factory.get(CLAP_PLUGIN_FACTORY_ID.as_ptr()) as *const clap_plugin_factory };
+
+    let plugin_count = unsafe { ((*plugin_factory).get_plugin_count).unwrap()(plugin_factory) };
+    assert_eq!(plugin_count, 1);
+
+    let desc_ptr = unsafe { ((*plugin_factory).get_plugin_descriptor).unwrap()(plugin_factory, 1) };
+    assert!(desc_ptr.is_null());
+
+    let desc_ptr = unsafe { ((*plugin_factory).get_plugin_descriptor).unwrap()(plugin_factory, 0) };
+    assert!(!desc_ptr.is_null());
+
+    let desc = unsafe { &*desc_ptr };
+    assert_eq!(desc.clap_version.major, CLAP_VERSION.major);
+    assert_eq!(desc.clap_version.minor, CLAP_VERSION.minor);
+    assert_eq!(desc.clap_version.revision, CLAP_VERSION.revision);
+    assert_eq!(unsafe { str_from_ptr(desc.id).unwrap() }, ID);
+    assert_eq!(unsafe { str_from_ptr(desc.name).unwrap() }, NAME);
+    assert_eq!(unsafe { str_from_ptr(desc.vendor).unwrap() }, VENDOR);
+    assert_eq!(unsafe { str_from_ptr(desc.url).unwrap() }, URL);
+    assert_eq!(unsafe { str_from_ptr(desc.manual_url).unwrap() }, "");
+    assert_eq!(unsafe { str_from_ptr(desc.support_url).unwrap() }, "");
+    assert_eq!(unsafe { str_from_ptr(desc.version).unwrap() }, VERSION);
+    assert_eq!(unsafe { str_from_ptr(desc.description).unwrap() }, "");
+    assert!(unsafe { *desc.features }.is_null());
+
+    unsafe { factory.deinit() };
+}