test: add basic tests for inline lexer

inline/src/lexer/tests.rs

@@ -0,0 +1,127 @@
+use crate::lexer::Lexer;
+use crate::{Spacing, Token, TokenKind};
+
+#[test]
+fn lexer_plain() {
+    let input = r#"This is some text"#;
+    let mut lexer = Lexer::new(input);
+
+    let expected = Token::new(TokenKind::Plain(String::from(input)), Spacing::Neither);
+
+    assert_eq!(lexer.next(), Some(expected));
+    assert_eq!(lexer.next(), None);
+}
+
+#[test]
+fn lexer_empty_bold() {
+    let input = r#"****"#;
+    let mut lexer = Lexer::new(input);
+
+    assert_eq!(
+        lexer.next(),
+        Some(Token::new(TokenKind::Bold, Spacing::Neither))
+    );
+
+    assert_eq!(
+        lexer.next(),
+        Some(Token::new(TokenKind::Bold, Spacing::Neither))
+    );
+}
+
+#[test]
+fn lexer_bold_plain() {
+    let input = r#"**Some text in bold**"#;
+    let mut lexer = Lexer::new(input);
+
+    assert_eq!(
+        lexer.next(),
+        Some(Token::new(TokenKind::Bold, Spacing::Neither))
+    );
+
+    assert_eq!(
+        lexer.next(),
+        Some(Token::new(
+            TokenKind::Plain(String::from("Some text in bold")),
+            Spacing::Neither
+        ))
+    );
+
+    assert_eq!(
+        lexer.next(),
+        Some(Token::new(TokenKind::Bold, Spacing::Neither))
+    );
+}
+
+#[test]
+fn lexer_italic_plain() {
+    let input = r#"*Some text in italic*"#;
+    let mut lexer = Lexer::new(input);
+
+    assert_eq!(
+        lexer.next(),
+        Some(Token::new(TokenKind::Italic, Spacing::Neither))
+    );
+
+    assert_eq!(
+        lexer.next(),
+        Some(Token::new(
+            TokenKind::Plain(String::from("Some text in italic")),
+            Spacing::Neither
+        ))
+    );
+
+    assert_eq!(
+        lexer.next(),
+        Some(Token::new(TokenKind::Italic, Spacing::Neither))
+    );
+}
+
+#[test]
+fn lexer_italic_bold_plain() {
+    let input = r#"*Some text in italic **with bold** inside*"#;
+    let mut lexer = Lexer::new(input);
+
+    assert_eq!(
+        lexer.next(),
+        Some(Token::new(TokenKind::Italic, Spacing::Neither))
+    );
+
+    assert_eq!(
+        lexer.next(),
+        Some(Token::new(
+            TokenKind::Plain(String::from("Some text in italic ")),
+            Spacing::Neither
+        ))
+    );
+
+    assert_eq!(
+        lexer.next(),
+        Some(Token::new(TokenKind::Bold, Spacing::Pre))
+    );
+
+    assert_eq!(
+        lexer.next(),
+        Some(Token::new(
+            TokenKind::Plain(String::from("with bold")),
+            Spacing::Neither
+        ))
+    );
+
+    assert_eq!(
+        lexer.next(),
+        Some(Token::new(TokenKind::Bold, Spacing::Post))
+    );
+
+    assert_eq!(
+        lexer.next(),
+        Some(Token::new(
+            TokenKind::Plain(String::from(" inside")),
+            Spacing::Neither
+        ))
+    );
+
+    assert_eq!(
+        lexer.next(),
+        Some(Token::new(TokenKind::Italic, Spacing::Neither))
+    )
+}