From 822dcf858a254f05b35bd42afdf5fcd236354713 Mon Sep 17 00:00:00 2001
From: Nao Pross <np@0hm.ch>
Date: Wed, 10 Mar 2021 01:13:14 +0100
Subject: Make tests runnable

---
 lua/demo.lua     |  4 +++
 src/testbench.rs | 90 +++++++++++++++++++++++++++++++++++++++++++++++++++-----
 2 files changed, 86 insertions(+), 8 deletions(-)

diff --git a/lua/demo.lua b/lua/demo.lua
index 31cb2be..a5d76b4 100644
--- a/lua/demo.lua
+++ b/lua/demo.lua
@@ -1,3 +1,7 @@
+-- ui.print("hello world")
+
 function do_something()
     return 1
 end
+
+return 10
diff --git a/src/testbench.rs b/src/testbench.rs
index ed0a2c1..9de4db1 100644
--- a/src/testbench.rs
+++ b/src/testbench.rs
@@ -1,8 +1,8 @@
+use std::ffi::OsStr;
 use std::fs;
 use std::io;
 use std::option::Option;
 use std::path::{Path, PathBuf};
-use std::ffi::OsStr;
 
 use imgui;
 use rlua::Lua;
@@ -10,21 +10,59 @@ use rlua::Lua;
 #[derive(Default, PartialEq)]
 pub struct Test {
     pub path: PathBuf,
+    text: Option<String>,
+}
+
+impl Test {
+    pub fn new(path: PathBuf) -> Test {
+        Test {
+            path: path,
+            text: None,
+        }
+    }
+
+    pub fn read(&mut self) -> &str {
+        if self.text.is_none() {
+            self.text = Some(fs::read_to_string(&self.path).expect("Failed to read file"));
+        }
+
+        return self.text.as_ref().unwrap();
+    }
 }
 
 #[derive(Default)]
 pub struct Bench {
     lua: Lua,
     tests: Vec<Test>,
+    tests_path: PathBuf,
     selected_test: Option<usize>,
+    console: Vec<imgui::ImString>,
 }
 
 impl Bench {
     pub fn new() -> Bench {
+        /* Prepare lua environment */
+        let lua = Lua::new();
+        let lua_setup = lua.context(|context| -> rlua::Result<()> {
+            use rlua::{String, Variadic};
+
+            let ui_table = context.create_table()?;
+            let ui_print = context.create_function(|_, strings: Variadic<String>| Ok(()))?;
+
+            ui_table.set("print", ui_print)?;
+
+            Ok(())
+        });
+
+        // TODO: handle errors
+        // if let Err(e) = lua_setup {}
+
         let mut b = Bench {
-            lua: Lua::new(),
+            lua: lua,
             tests: Vec::new(),
+            tests_path: PathBuf::from("lua"),
             selected_test: None,
+            console: Vec::new(),
         };
 
         // TODO: set graphically and use RV
@@ -48,7 +86,7 @@ impl Bench {
                     .into_iter()
                     .filter(|f| f.is_file())
                     .filter(|f| f.extension().unwrap_or(OsStr::new("")) == "lua")
-                    .map(|f| Test { path: f })
+                    .map(|f| Test::new(f))
                     .collect();
 
                 return Ok(());
@@ -84,17 +122,53 @@ impl Bench {
                     ui.text_wrapped(&imstr);
                     ui.same_line(0.);
                     if ui.button(im_str!("Run"), [0., 0.]) {
+                        self.run_test(index);
                     }
+
                     ui.same_line(0.);
-                    if ui.button(im_str!("Show"), [0., 0.]) {}
+                    if ui.button(im_str!("Show"), [0., 0.]) {
+                        self.show_test(index);
+                    }
                 }
             }
+
+            ui.separator();
+            ChildWindow::new("console")
+                .size([0., 0.])
+                .scrollable(true)
+                .build(&ui, || {
+                    for line in &self.console {
+                        ui.text(line);
+                    }
+                });
         });
     }
 
-    fn run_test(&self, index: usize) {
-        self.lua.context(|context| {
-            
-        });
+    fn run_test(&mut self, index: usize) {
+        if let Some(test) = self.tests.get_mut(index) {
+            let text = test.read();
+            let mut output = imgui::ImString::new("");
+
+            self.lua.context(
+                |context| match context.load(text).eval::<rlua::MultiValue>() {
+                    Ok(values) => {
+                        output.push_str(
+                            &values
+                                .iter()
+                                .map(|value| format!("{:?}", value))
+                                .collect::<Vec<_>>()
+                                .join("\t"),
+                        );
+                    }
+                    Err(e) => {
+                        output.push_str(&e.to_string());
+                    }
+                },
+            );
+
+            self.console.push(output);
+        }
     }
+
+    fn show_test(&self, index: usize) {}
 }
-- 
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