Setup a testing bench

Signed-off-by: Marcel Müller <neikos@neikos.email>

tests/file_tests.rs

@@ -0,0 +1,46 @@
+use std::collections::HashMap;
+
+use temple::Context;
+
+#[test]
+fn check_cases() {
+    insta::glob!("cases/*.temple", |path| {
+        let mut settings = insta::Settings::clone_current();
+        settings.set_snapshot_path("cases");
+        settings.set_snapshot_suffix(path.file_stem().unwrap().display().to_string());
+        settings.set_prepend_module_to_snapshot(false);
+        let _guard = settings.bind_to_scope();
+
+        let input = std::fs::read_to_string(path).unwrap();
+
+        let (context, input) = input.split_once("\n---\n").unwrap_or_else(|| ("", &input));
+
+        let map = if !context.is_empty() {
+            serde_json::from_str::<HashMap<String, serde_json::Value>>(context).unwrap()
+        } else {
+            HashMap::new()
+        };
+
+        let mut context = Context::new();
+
+        for (k, v) in map {
+            context.insert(k, v);
+        }
+
+        let parsed = temple::parser::parse(input.into()).unwrap();
+
+        insta::assert_debug_snapshot!("parsed", parsed);
+
+        let ast = temple::ast::parse(parsed.tokens()).unwrap();
+
+        insta::assert_debug_snapshot!("ast", ast);
+
+        let emit = temple::emit::emit_machine(ast);
+
+        insta::assert_debug_snapshot!("instructions", emit);
+
+        let output = temple::eval::execute(&emit, &context).unwrap();
+
+        insta::assert_debug_snapshot!("output", output);
+    });
+}