added expression tests

nac3core/src/expression.rs

@@ -383,3 +383,641 @@ fn infer_list_comprehension(
     }
 }
 
+#[cfg(test)]
+mod test {
+    use super::*;
+    use crate::typedef::*;
+    use rustpython_parser::parser::parse_expression;
+
+    #[test]
+    fn test_constants() {
+        let ctx = basic_ctx();
+        let sym_table = HashMap::new();
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("123").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(INT32_TYPE).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("2147483647").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(INT32_TYPE).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("2147483648").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(INT64_TYPE).into());
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("9223372036854775807").unwrap(),
+        );
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(INT64_TYPE).into());
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("9223372036854775808").unwrap(),
+        );
+        assert_eq!(result, Err("integer out of range".into()));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("123.456").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(FLOAT_TYPE).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("True").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(BOOL_TYPE).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("False").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(BOOL_TYPE).into());
+    }
+
+    #[test]
+    fn test_identifier() {
+        let ctx = basic_ctx();
+        let mut sym_table = HashMap::new();
+        sym_table.insert("abc", Rc::new(PrimitiveType(INT32_TYPE)));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("abc").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(INT32_TYPE).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("ab").unwrap());
+        assert_eq!(result, Err("unbounded variable".into()));
+    }
+
+    #[test]
+    fn test_list() {
+        let mut ctx = basic_ctx();
+        ctx.add_fn(
+            "foo",
+            FnDef {
+                args: vec![],
+                result: None,
+            },
+        );
+        let mut sym_table = HashMap::new();
+        sym_table.insert("abc", Rc::new(PrimitiveType(INT32_TYPE)));
+        // def is reserved...
+        sym_table.insert("efg", Rc::new(PrimitiveType(INT32_TYPE)));
+        sym_table.insert("xyz", Rc::new(PrimitiveType(FLOAT_TYPE)));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("[]").unwrap());
+        assert_eq!(
+            result.unwrap().unwrap(),
+            ParametricType(LIST_TYPE, vec![BotType.into()]).into()
+        );
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("[abc]").unwrap());
+        assert_eq!(
+            result.unwrap().unwrap(),
+            ParametricType(LIST_TYPE, vec![PrimitiveType(INT32_TYPE).into()]).into()
+        );
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("[abc, efg]").unwrap());
+        assert_eq!(
+            result.unwrap().unwrap(),
+            ParametricType(LIST_TYPE, vec![PrimitiveType(INT32_TYPE).into()]).into()
+        );
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("[abc, efg, xyz]").unwrap(),
+        );
+        assert_eq!(result, Err("inhomogeneous list is not allowed".into()));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("[foo()]").unwrap());
+        assert_eq!(result, Err("list elements must have some type".into()));
+    }
+
+    #[test]
+    fn test_tuple() {
+        let mut ctx = basic_ctx();
+        ctx.add_fn(
+            "foo",
+            FnDef {
+                args: vec![],
+                result: None,
+            },
+        );
+        let mut sym_table = HashMap::new();
+        sym_table.insert("abc", Rc::new(PrimitiveType(INT32_TYPE)));
+        sym_table.insert("efg", Rc::new(PrimitiveType(FLOAT_TYPE)));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("(abc, efg)").unwrap());
+        assert_eq!(
+            result.unwrap().unwrap(),
+            ParametricType(
+                TUPLE_TYPE,
+                vec![
+                    PrimitiveType(INT32_TYPE).into(),
+                    PrimitiveType(FLOAT_TYPE).into()
+                ]
+            )
+            .into()
+        );
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("(abc, efg, foo())").unwrap(),
+        );
+        assert_eq!(result, Err("tuple elements must have some type".into()));
+    }
+
+    #[test]
+    fn test_attribute() {
+        let mut ctx = basic_ctx();
+        ctx.add_fn(
+            "none",
+            FnDef {
+                args: vec![],
+                result: None,
+            },
+        );
+
+        let foo = ctx.add_class(ClassDef {
+            base: TypeDef {
+                name: "Foo",
+                fields: HashMap::new(),
+                methods: HashMap::new(),
+            },
+            parents: vec![],
+        });
+        let foo_def = ctx.get_class_mut(foo);
+        foo_def
+            .base
+            .fields
+            .insert("a", PrimitiveType(INT32_TYPE).into());
+        foo_def.base.fields.insert("b", ClassType(foo).into());
+        foo_def
+            .base
+            .fields
+            .insert("c", PrimitiveType(INT32_TYPE).into());
+
+        let bar = ctx.add_class(ClassDef {
+            base: TypeDef {
+                name: "Bar",
+                fields: HashMap::new(),
+                methods: HashMap::new(),
+            },
+            parents: vec![],
+        });
+        let bar_def = ctx.get_class_mut(bar);
+        bar_def
+            .base
+            .fields
+            .insert("a", PrimitiveType(INT32_TYPE).into());
+        bar_def.base.fields.insert("b", ClassType(bar).into());
+        bar_def
+            .base
+            .fields
+            .insert("c", PrimitiveType(FLOAT_TYPE).into());
+
+        let v0 = ctx.add_variable(VarDef {
+            name: "v0",
+            bound: vec![],
+        });
+
+        let v1 = ctx.add_variable(VarDef {
+            name: "v1",
+            bound: vec![ClassType(foo).into(), ClassType(bar).into()],
+        });
+
+        let mut sym_table = HashMap::new();
+        sym_table.insert("foo", Rc::new(ClassType(foo)));
+        sym_table.insert("bar", Rc::new(ClassType(bar)));
+        sym_table.insert("foobar", Rc::new(VirtualClassType(foo)));
+        sym_table.insert("v0", Rc::new(TypeVariable(v0)));
+        sym_table.insert("v1", Rc::new(TypeVariable(v1)));
+        sym_table.insert("bot", Rc::new(BotType));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("foo.a").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(INT32_TYPE).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("foo.d").unwrap());
+        assert_eq!(result, Err("no such field".into()));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("foobar.a").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(INT32_TYPE).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("v0.a").unwrap());
+        assert_eq!(result, Err("no fields on unbounded type variable".into()));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("v1.a").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(INT32_TYPE).into());
+
+        // shall we support this?
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("v1.b").unwrap());
+        assert_eq!(
+            result,
+            Err("unknown field (type mismatch between variants)".into())
+        );
+        // assert_eq!(result.unwrap().unwrap(), TypeVariable(v1).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("v1.c").unwrap());
+        assert_eq!(
+            result,
+            Err("unknown field (type mismatch between variants)".into())
+        );
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("v1.d").unwrap());
+        assert_eq!(result, Err("unknown field".into()));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("none().a").unwrap());
+        assert_eq!(result, Err("no value".into()));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("bot.a").unwrap());
+        assert_eq!(result, Err("this object has no fields".into()));
+    }
+
+    #[test]
+    fn test_bool_ops() {
+        let mut ctx = basic_ctx();
+        ctx.add_fn(
+            "none",
+            FnDef {
+                args: vec![],
+                result: None,
+            },
+        );
+        let sym_table = HashMap::new();
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("True and False").unwrap(),
+        );
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(BOOL_TYPE).into());
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("True and none()").unwrap(),
+        );
+        assert_eq!(result, Err("no value".into()));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("True and 123").unwrap());
+        assert_eq!(result, Err("bool operands must be bool".into()));
+    }
+
+    #[test]
+    fn test_bin_ops() {
+        let mut ctx = basic_ctx();
+        let v0 = ctx.add_variable(VarDef {
+            name: "v0",
+            bound: vec![
+                PrimitiveType(INT32_TYPE).into(),
+                PrimitiveType(INT64_TYPE).into(),
+            ],
+        });
+        let mut sym_table = HashMap::new();
+        sym_table.insert("a", TypeVariable(v0).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("1 + 2 + 3").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(INT32_TYPE).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("a + a + a").unwrap());
+        assert_eq!(result.unwrap().unwrap(), TypeVariable(v0).into());
+    }
+
+    #[test]
+    fn test_unary_ops() {
+        let mut ctx = basic_ctx();
+        let v0 = ctx.add_variable(VarDef {
+            name: "v0",
+            bound: vec![
+                PrimitiveType(INT32_TYPE).into(),
+                PrimitiveType(INT64_TYPE).into(),
+            ],
+        });
+        let mut sym_table = HashMap::new();
+        sym_table.insert("a", TypeVariable(v0).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("-(123)").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(INT32_TYPE).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("-a").unwrap());
+        assert_eq!(result.unwrap().unwrap(), TypeVariable(v0).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("not True").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(BOOL_TYPE).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("not (1)").unwrap());
+        assert_eq!(result, Err("logical not must be applied to bool".into()));
+    }
+
+    #[test]
+    fn test_compare() {
+        let mut ctx = basic_ctx();
+        let v0 = ctx.add_variable(VarDef {
+            name: "v0",
+            bound: vec![
+                PrimitiveType(INT32_TYPE).into(),
+                PrimitiveType(INT64_TYPE).into(),
+            ],
+        });
+        let mut sym_table = HashMap::new();
+        sym_table.insert("a", TypeVariable(v0).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("a == a == a").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(BOOL_TYPE).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("a == a == 1").unwrap());
+        assert_eq!(result, Err("not equal".into()));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("True > False").unwrap());
+        assert_eq!(result, Err("no such function".into()));
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("True in False").unwrap(),
+        );
+        assert_eq!(result, Err("unsupported comparison".into()));
+    }
+
+    #[test]
+    fn test_call() {
+        let mut ctx = basic_ctx();
+        ctx.add_fn(
+            "none",
+            FnDef {
+                args: vec![],
+                result: None,
+            },
+        );
+
+        let foo = ctx.add_class(ClassDef {
+            base: TypeDef {
+                name: "Foo",
+                fields: HashMap::new(),
+                methods: HashMap::new(),
+            },
+            parents: vec![],
+        });
+        let foo_def = ctx.get_class_mut(foo);
+        foo_def.base.methods.insert(
+            "a",
+            FnDef {
+                args: vec![],
+                result: Some(Rc::new(ClassType(foo))),
+            },
+        );
+
+        let bar = ctx.add_class(ClassDef {
+            base: TypeDef {
+                name: "Bar",
+                fields: HashMap::new(),
+                methods: HashMap::new(),
+            },
+            parents: vec![],
+        });
+        let bar_def = ctx.get_class_mut(bar);
+        bar_def.base.methods.insert(
+            "a",
+            FnDef {
+                args: vec![],
+                result: Some(Rc::new(ClassType(bar))),
+            },
+        );
+
+        let v0 = ctx.add_variable(VarDef {
+            name: "v0",
+            bound: vec![],
+        });
+        let v1 = ctx.add_variable(VarDef {
+            name: "v1",
+            bound: vec![ClassType(foo).into(), ClassType(bar).into()],
+        });
+        let v2 = ctx.add_variable(VarDef {
+            name: "v2",
+            bound: vec![
+                ClassType(foo).into(),
+                ClassType(bar).into(),
+                PrimitiveType(INT32_TYPE).into(),
+            ],
+        });
+        let mut sym_table = HashMap::new();
+        sym_table.insert("foo", Rc::new(ClassType(foo)));
+        sym_table.insert("bar", Rc::new(ClassType(bar)));
+        sym_table.insert("foobar", Rc::new(VirtualClassType(foo)));
+        sym_table.insert("v0", Rc::new(TypeVariable(v0)));
+        sym_table.insert("v1", Rc::new(TypeVariable(v1)));
+        sym_table.insert("v2", Rc::new(TypeVariable(v2)));
+        sym_table.insert("bot", Rc::new(BotType));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("foo.a()").unwrap());
+        assert_eq!(result.unwrap().unwrap(), ClassType(foo).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("v1.a()").unwrap());
+        assert_eq!(result.unwrap().unwrap(), TypeVariable(v1).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("foobar.a()").unwrap());
+        assert_eq!(result.unwrap().unwrap(), ClassType(foo).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("none().a()").unwrap());
+        assert_eq!(result, Err("no value".into()));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("bot.a()").unwrap());
+        assert_eq!(result, Err("not supported".into()));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("[][0].a()").unwrap());
+        assert_eq!(result, Err("not supported".into()));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("v0.a()").unwrap());
+        assert_eq!(result, Err("unbounded type var".into()));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("v2.a()").unwrap());
+        assert_eq!(result, Err("no such function".into()));
+    }
+
+    #[test]
+    fn infer_subscript() {
+        let mut ctx = basic_ctx();
+        ctx.add_fn(
+            "none",
+            FnDef {
+                args: vec![],
+                result: None,
+            },
+        );
+        let sym_table = HashMap::new();
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("[1, 2, 3][0]").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(INT32_TYPE).into());
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("[[1]][0][0]").unwrap());
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(INT32_TYPE).into());
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("[1, 2, 3][1:2]").unwrap(),
+        );
+        assert_eq!(
+            result.unwrap().unwrap(),
+            ParametricType(LIST_TYPE, vec![PrimitiveType(INT32_TYPE).into()]).into()
+        );
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("[1, 2, 3][1:2:2]").unwrap(),
+        );
+        assert_eq!(
+            result.unwrap().unwrap(),
+            ParametricType(LIST_TYPE, vec![PrimitiveType(INT32_TYPE).into()]).into()
+        );
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("[1, 2, 3][1:1.2]").unwrap(),
+        );
+        assert_eq!(result, Err("slice must be int32 type".into()));
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("[1, 2, 3][1:none()]").unwrap(),
+        );
+        assert_eq!(result, Err("slice must have type".into()));
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("[1, 2, 3][1.2]").unwrap(),
+        );
+        assert_eq!(result, Err("index must be either slice or int32".into()));
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("[1, 2, 3][none()]").unwrap(),
+        );
+        assert_eq!(result, Err("no value".into()));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("none()[1.2]").unwrap());
+        assert_eq!(result, Err("no value".into()));
+
+        let result = infer_expr(&ctx, &sym_table, &parse_expression("123[1]").unwrap());
+        assert_eq!(
+            result,
+            Err("subscript is not supported for types other than list".into())
+        );
+    }
+
+    #[test]
+    fn test_if_expr() {
+        let mut ctx = basic_ctx();
+        ctx.add_fn(
+            "none",
+            FnDef {
+                args: vec![],
+                result: None,
+            },
+        );
+        let sym_table = HashMap::new();
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("1 if True else 0").unwrap(),
+        );
+        assert_eq!(result.unwrap().unwrap(), PrimitiveType(INT32_TYPE).into());
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("none() if True else none()").unwrap(),
+        );
+        assert_eq!(result.unwrap(), None);
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("none() if 1 else none()").unwrap(),
+        );
+        assert_eq!(result, Err("test should be bool".into()));
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("1 if True else none()").unwrap(),
+        );
+        assert_eq!(result, Err("divergent type".into()));
+    }
+
+    #[test]
+    fn test_list_comp() {
+        let mut ctx = basic_ctx();
+        ctx.add_fn(
+            "none",
+            FnDef {
+                args: vec![],
+                result: None,
+            },
+        );
+        let int32 = Rc::new(PrimitiveType(INT32_TYPE));
+        let mut sym_table = HashMap::new();
+        sym_table.insert("z", int32.clone());
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("[x for x in [(1, 2), (2, 3), (3, 4)]][0]").unwrap(),
+        );
+        assert_eq!(
+            result.unwrap().unwrap(),
+            ParametricType(TUPLE_TYPE, vec![int32.clone(), int32.clone()]).into()
+        );
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("[x for (x, y) in [(1, 2), (2, 3), (3, 4)]][0]").unwrap(),
+        );
+        assert_eq!(result.unwrap().unwrap(), int32.clone());
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("[x for (x, y) in [(1, 2), (2, 3), (3, 4)] if x > 0][0]").unwrap(),
+        );
+        assert_eq!(result.unwrap().unwrap(), int32.clone());
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("[x for (x, y) in [(1, 2), (2, 3), (3, 4)] if x][0]").unwrap(),
+        );
+        assert_eq!(result, Err("test must be bool".into()));
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("[y for x in []][0]").unwrap(),
+        );
+        assert_eq!(result, Err("unbounded variable".into()));
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("[none() for x in []][0]").unwrap(),
+        );
+        assert_eq!(result, Err("no value".into()));
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("[z for z in []][0]").unwrap(),
+        );
+        assert_eq!(result, Err("duplicated naming".into()));
+
+        let result = infer_expr(
+            &ctx,
+            &sym_table,
+            &parse_expression("[x for x in [] for y in []]").unwrap(),
+        );
+        assert_eq!(
+            result,
+            Err("only 1 generator statement is supported".into())
+        );
+    }
+}