Merge branch 'feature/clojure.string' [#41]

Author: Tko1

src/clojure_string.rs

@@ -0,0 +1,12 @@
+pub(crate) mod blank_qmark_;
+pub(crate) mod ends_with_qmark_;
+pub(crate) mod includes_qmark_;
+pub(crate) mod join;
+pub(crate) mod lower_case;
+pub(crate) mod reverse;
+pub(crate) mod starts_with_qmark_;
+pub(crate) mod trim;
+pub(crate) mod trim_newline;
+pub(crate) mod triml;
+pub(crate) mod trimr;
+pub(crate) mod upper_case;

src/clojure_string/blank_qmark_.rs

@@ -0,0 +1,90 @@
+use crate::ifn::IFn;
+use crate::value::{ToValue, Value};
+use std::rc::Rc;
+
+use crate::error_message;
+use crate::type_tag::TypeTag;
+
+/// clojure.string/blank? ; returns true if nil, empty or whitespace
+#[derive(Debug, Clone)]
+pub struct BlankFn {}
+impl ToValue for BlankFn {
+    fn to_value(&self) -> Value {
+        Value::IFn(Rc::new(self.clone()))
+    }
+}
+impl IFn for BlankFn {
+    fn invoke(&self, args: Vec<Rc<Value>>) -> Value {
+        if args.len() != 1 {
+            return error_message::wrong_arg_count(1, args.len());
+        } else {
+            match args.get(0).unwrap().to_value() {
+                Value::Nil => Value::Boolean(true),
+                Value::String(s) => {
+                    if s.len() == 0 {
+                        Value::Boolean(true)
+                    } else {
+                        return Value::Boolean(
+                            s.chars()
+                                .filter(|c| !c.is_whitespace())
+                                .collect::<Vec<char>>()
+                                .len()
+                                == 0,
+                        );
+                    }
+                }
+                Value::String(s) => Value::String(s.chars().rev().collect()),
+                _a => error_message::type_mismatch(TypeTag::String, &_a.to_value()),
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    mod reverse_tests {
+        use crate::clojure_string::blank_qmark_::BlankFn;
+        use crate::ifn::IFn;
+        use crate::value::Value;
+        use std::rc::Rc;
+
+        #[test]
+        fn is_non_empty_string_blank() {
+            let blank = BlankFn {};
+            let s = "hello";
+            let args = vec![Rc::new(Value::String(String::from(s)))];
+            assert_eq!(Value::Boolean(false), blank.invoke(args));
+        }
+
+        #[test]
+        fn is_empty_string_blank() {
+            let blank = BlankFn {};
+            let s = "";
+            let args = vec![Rc::new(Value::String(String::from(s)))];
+            assert_eq!(Value::Boolean(true), blank.invoke(args));
+        }
+
+        #[test]
+        fn is_string_with_whitespace_only_blank() {
+            let blank = BlankFn {};
+            let s = " \t \n   \r ";
+            let args = vec![Rc::new(Value::String(String::from(s)))];
+            assert_eq!(Value::Boolean(true), blank.invoke(args));
+        }
+
+        #[test]
+        fn is_string_with_whitespace_and_text_blank() {
+            let blank = BlankFn {};
+            let s = " \thello \n   \r ";
+            let args = vec![Rc::new(Value::String(String::from(s)))];
+            assert_eq!(Value::Boolean(false), blank.invoke(args));
+        }
+
+        #[test]
+        fn is_nil_blank() {
+            let blank = BlankFn {};
+            let args = vec![Rc::new(Value::Nil)];
+            assert_eq!(Value::Boolean(true), blank.invoke(args));
+        }
+    }
+}

src/clojure_string/ends_with_qmark_.rs

@@ -0,0 +1,78 @@
+use crate::ifn::IFn;
+use crate::value::{ToValue, Value};
+use std::rc::Rc;
+
+use crate::error_message;
+use crate::type_tag::TypeTag;
+
+/// clojure.string/ends-with? ; returns true if string ends with substring
+#[derive(Debug, Clone)]
+pub struct EndsWithFn {}
+impl ToValue for EndsWithFn {
+    fn to_value(&self) -> Value {
+        Value::IFn(Rc::new(self.clone()))
+    }
+}
+impl IFn for EndsWithFn {
+    fn invoke(&self, args: Vec<Rc<Value>>) -> Value {
+        if args.len() != 2 {
+            return error_message::wrong_arg_count(2, args.len());
+        } else {
+            match (
+                args.get(0).unwrap().to_value(),
+                args.get(1).unwrap().to_value(),
+            ) {
+                (Value::String(s), Value::String(substring)) => {
+                    Value::Boolean(s.ends_with(&substring))
+                }
+                _a => error_message::type_mismatch(TypeTag::String, &_a.1.to_value()),
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    mod reverse_tests {
+        use crate::clojure_string::ends_with_qmark_::EndsWithFn;
+        use crate::ifn::IFn;
+        use crate::value::Value;
+        use std::rc::Rc;
+
+        #[test]
+        fn hello_ends_with_lo() {
+            let ends_with = EndsWithFn {};
+            let s = "hello";
+            let substring = "lo";
+            let args = vec![
+                Rc::new(Value::String(String::from(s))),
+                Rc::new(Value::String(String::from(substring))),
+            ];
+            assert_eq!(Value::Boolean(true), ends_with.invoke(args));
+        }
+
+        #[test]
+        fn hello_does_not_end_with_klo() {
+            let ends_with = EndsWithFn {};
+            let s = "hello";
+            let substring = "klo";
+            let args = vec![
+                Rc::new(Value::String(String::from(s))),
+                Rc::new(Value::String(String::from(substring))),
+            ];
+            assert_eq!(Value::Boolean(false), ends_with.invoke(args));
+        }
+
+        #[test]
+        fn hello_ends_with_empty_string() {
+            let ends_with = EndsWithFn {};
+            let s = "hello";
+            let substring = "";
+            let args = vec![
+                Rc::new(Value::String(String::from(s))),
+                Rc::new(Value::String(String::from(substring))),
+            ];
+            assert_eq!(Value::Boolean(true), ends_with.invoke(args));
+        }
+    }
+}

src/clojure_string/includes_qmark_.rs

@@ -0,0 +1,78 @@
+use crate::ifn::IFn;
+use crate::value::{ToValue, Value};
+use std::rc::Rc;
+
+use crate::error_message;
+use crate::type_tag::TypeTag;
+
+/// clojure.string/includes? ; returns true if string contains substring
+#[derive(Debug, Clone)]
+pub struct IncludesFn {}
+impl ToValue for IncludesFn {
+    fn to_value(&self) -> Value {
+        Value::IFn(Rc::new(self.clone()))
+    }
+}
+impl IFn for IncludesFn {
+    fn invoke(&self, args: Vec<Rc<Value>>) -> Value {
+        if args.len() != 2 {
+            return error_message::wrong_arg_count(2, args.len());
+        } else {
+            match (
+                args.get(0).unwrap().to_value(),
+                args.get(1).unwrap().to_value(),
+            ) {
+                (Value::String(s), Value::String(substring)) => {
+                    Value::Boolean(s.contains(&substring))
+                }
+                _a => error_message::type_mismatch(TypeTag::String, &_a.1.to_value()),
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    mod reverse_tests {
+        use crate::clojure_string::includes_qmark_::IncludesFn;
+        use crate::ifn::IFn;
+        use crate::value::Value;
+        use std::rc::Rc;
+
+        #[test]
+        fn hello_includes_ell() {
+            let includes = IncludesFn {};
+            let s = "hello";
+            let substring = "ell";
+            let args = vec![
+                Rc::new(Value::String(String::from(s))),
+                Rc::new(Value::String(String::from(substring))),
+            ];
+            assert_eq!(Value::Boolean(true), includes.invoke(args));
+        }
+
+        #[test]
+        fn hello_does_not_include_leh() {
+            let includes = IncludesFn {};
+            let s = "hello";
+            let substring = "leh";
+            let args = vec![
+                Rc::new(Value::String(String::from(s))),
+                Rc::new(Value::String(String::from(substring))),
+            ];
+            assert_eq!(Value::Boolean(false), includes.invoke(args));
+        }
+
+        #[test]
+        fn hello_includes_empty_string() {
+            let includes = IncludesFn {};
+            let s = "hello";
+            let substring = "";
+            let args = vec![
+                Rc::new(Value::String(String::from(s))),
+                Rc::new(Value::String(String::from(substring))),
+            ];
+            assert_eq!(Value::Boolean(true), includes.invoke(args));
+        }
+    }
+}