feature/coverage

lykiadb-server/src/engine/error.rs

@@ -38,24 +38,23 @@ impl From<ScanError> for ExecutionError {
     }
 }
 
-pub fn report_error(filename: &str, source: &str, error: ExecutionError) {
+pub fn report_error(source_name: &str, source: &str, error: ExecutionError, mut writer: impl std::io::Write) {
     use ariadne::{Color, Label, Report, ReportKind, Source};
 
     // Generate & choose some colours for each of our elements
     let out = Color::Fixed(81);
 
-    let print = |message: &str, hint: &str, span: Span| {
-        Report::build(ReportKind::Error, filename, 12)
+    let mut print = |message: &str, hint: &str, span: Span| {
+        Report::build(ReportKind::Error, source_name, 12)
             .with_code(3)
             .with_message(format!("{} at line {}", message, span.line + 1))
             .with_label(
-                Label::new((filename, span.start..span.end))
+                Label::new((source_name, span.start..span.end))
                     .with_message(hint)
                     .with_color(out),
             )
             .finish()
-            .print((filename, Source::from(&source)))
-            .unwrap();
+            .write((source_name, Source::from(&source)), &mut writer).unwrap();
     };
 
     match error {
@@ -89,8 +88,8 @@ pub fn report_error(filename: &str, source: &str, error: ExecutionError) {
         }
         ExecutionError::Parse(ParseError::NoTokens) => {
             print(
-                "There is nothing to parse.",
-                "What about adding some tokens?",
+                "There is nothing to parse",
+                "",
                 Span::default(),
             );
         }
@@ -153,7 +152,6 @@ pub fn report_error(filename: &str, source: &str, error: ExecutionError) {
             );
         }
         ExecutionError::Plan(PlannerError::SubqueryNotAllowed(span)) => {
-            println!("{:?}", span);
             print(
                 "Subquery not allowed",
                 "Subqueries are not allowed in this context.",
@@ -165,5 +163,274 @@ pub fn report_error(filename: &str, source: &str, error: ExecutionError) {
             print(&message, "", Span::default());
         }
         _ => {}
+    };
+}
+#[cfg(test)]
+mod tests {
+    use core::panic;
+
+    use super::*;
+    use lykiadb_lang::{kw, sym, tokenizer::token::{Keyword, Symbol, Token, TokenType}, Identifier, Literal};
+
+    fn capture_error_output(filename: &str, source: &str, error: ExecutionError) -> String {
+        let mut output = Vec::new();
+        report_error(filename, source, error, &mut output);
+        String::from_utf8(output).unwrap()
+    }
+
+
+    // Scanner Error Tests
+    #[test]
+    fn test_scanner_unterminated_string() {
+        let source = r#"let x = "unterminated"#;
+        let error = ExecutionError::Scan(ScanError::UnterminatedString {
+            span: Span {
+                start: 8,
+                end: 21,
+                line: 0,
+                line_end: 0,
+            },
+        });
+
+        let output = capture_error_output("test.txt", source, error);
+        assert!(output.contains("Unterminated string"));
+        assert!(output.contains("Terminate the string with a double quote"));
+    }
+
+    #[test]
+    fn test_scanner_malformed_number() {
+        let source = "let x = 123.456.789";
+        let error = ExecutionError::Scan(ScanError::MalformedNumberLiteral {
+            span: Span {
+                start: 8,
+                end: 19,
+                line: 0,
+                line_end: 0,
+            },
+        });
+
+        let output = capture_error_output("test.txt", source, error);
+        assert!(output.contains("Malformed number literal"));
+        assert!(output.contains("Make sure that number literal is up to spec"));
+    }
+
+    // Parser Error Tests
+    #[test]
+    fn test_parser_missing_token() {
+        let source = "var x = ";
+        let error = ExecutionError::Parse(ParseError::MissingToken {
+            token: Token {
+                tok_type: kw!(Keyword::Var),
+                lexeme: Some("var".to_string()),
+                span: Span {
+                    start: 0,
+                    end: 3,
+                    line: 0,
+                    line_end: 0,
+                },
+                literal: None,
+            },
+            expected: TokenType::Identifier { dollar: true }
+        });
+
+        let output = capture_error_output("test.txt", source, error);
+        assert!(output.contains("Missing token"));
+        assert!(output.contains("Add a Identifier { dollar: true } token after \"var\"."));
+    }
+
+    #[test]
+    fn test_parser_no_tokens() {
+        let source = "";
+        let error = ExecutionError::Parse(ParseError::NoTokens);
+
+        let output = capture_error_output("test.txt", source, error);
+
+        assert!(output.contains("There is nothing to parse"));
+    }
+
+    #[test]
+    fn test_parser_unexpected_token() {
+        let source = "let x = ;";
+        let error = ExecutionError::Parse(ParseError::UnexpectedToken {
+            token: Token {
+                tok_type: sym!(Symbol::Semicolon),
+                lexeme: Some(";".to_string()),
+                span: Span {
+                    start: 8,
+                    end: 9,
+                    line: 0,
+                    line_end: 0,
+                },
+                literal: None,
+            },
+        });
+
+        let output = capture_error_output("test.txt", source, error);
+        assert!(output.contains("Unexpected token"));
+        assert!(output.contains("Unexpected token ;"));
+    }
+
+    #[test]
+    fn test_interpreter_unexpected_statement() {
+        let source = "break;";
+        let error = ExecutionError::Interpret(InterpretError::UnexpectedStatement {
+            span: Span {
+                start: 0,
+                end: 5,
+                line: 0,
+                line_end: 0,
+            },
+        });
+
+        let output = capture_error_output("test.txt", source, error);
+        assert!(output.contains("Unexpected statement"));
+        assert!(output.contains("Remove this"));
+    }
+
+    #[test]
+    fn test_parser_invalid_assignment() {
+        let source = "5 = 10";
+        let error = ExecutionError::Parse(ParseError::InvalidAssignmentTarget {
+            left: Token {
+                tok_type: TokenType::Num,
+                lexeme: Some("5".to_string()),
+                span: Span {
+                    start: 0,
+                    end: 1,
+                    line: 0,
+                    line_end: 0,
+                },
+                literal: Some(Literal::Num(5.0)),
+            },
+        });
+
+        let output = capture_error_output("test.txt", source, error);
+        assert!(output.contains("Invalid assignment target"));
+        assert!(output.contains("No values can be assigned to 5"));
+    }
+
+    // Planner Error Tests
+    #[test]
+    fn test_planner_duplicate_object() {
+        let source = "Select * from users, users;";
+        let error = ExecutionError::Plan(PlannerError::DuplicateObjectInScope {
+            previous: Identifier::new("users", false),
+            ident: Identifier::new("users", false),
+        });
+
+        let output = capture_error_output("test.txt", source, error);
+        assert!(output.contains("Duplicate object in scope"));
+        assert!(output.contains("Object users is already defined in the scope"));
+    }
+
+    #[test]
+    fn test_planner_subquery_not_allowed() {
+        let source = "SELECT * FROM users inner join orders on users.id = (SELECT id FROM users);";
+        let error = ExecutionError::Plan(PlannerError::SubqueryNotAllowed(Span {
+            start: 47,
+            end: 70,
+            line: 0,
+            line_end: 0,
+        }));
+
+        let output = capture_error_output("test.txt", source, error);
+        assert!(output.contains("Subquery not allowed"));
+        assert!(output.contains("Subqueries are not allowed in this context"));
+    }
+
+    // Interpreter Error Tests
+    #[test]
+    fn test_interpreter_arity_mismatch() {
+        let source = "function test(a, b) {}; test(1);";
+        let error = ExecutionError::Interpret(InterpretError::ArityMismatch {
+            span: Span {
+                start: 24,
+                end: 29,
+                line: 0,
+                line_end: 0,
+            },
+            expected: 2,
+            found: 1,
+        });
+
+        let output = capture_error_output("test.txt", source, error);
+        assert!(output.contains("Function arity mismatch"));
+        assert!(output.contains("Function expects 2 arguments, while provided 1"));
+    }
+
+    #[test]
+    fn test_interpreter_not_callable() {
+        let source = "let x = 5; x();";
+        let error = ExecutionError::Interpret(InterpretError::NotCallable {
+            span: Span {
+                start: 12,
+                end: 15,
+                line: 0,
+                line_end: 0,
+            },
+        });
+
+        let output = capture_error_output("test.txt", source, error);
+        assert!(output.contains("Not callable"));
+        assert!(output.contains("Expression does not yield a callable"));
+    }
+
+    // Environment Error Tests
+    #[test]
+    fn test_environment_variable_not_found() {
+        let source = "io::print(undefined_var);";
+        let error = ExecutionError::Environment(EnvironmentError::Other {
+            message: "Variable 'undefined_var' not found in current scope".to_string(),
+        });
+
+        let output = capture_error_output("test.txt", source, error);
+        assert!(output.contains("Variable 'undefined_var' not found in current scope"));
+    }
+
+    #[test]
+    fn test_scan_error_reporting() {
+        let source = "let x = @";
+        let error = ExecutionError::Scan(ScanError::UnexpectedCharacter {
+            span: Span {
+                start: 8,
+                end: 9,
+                line: 0,
+                line_end: 0,
+            },
+        });
+
+        let output = capture_error_output("test.txt", source, error);
+        assert!(output.contains("Unexpected character"));
+        assert!(output.contains("Remove this character"));
+        assert!(output.contains("at line 1"));
+    }
+
+    #[test]
+    fn test_interpret_error_reporting() {
+        let source = "obj.nonexistent";
+        let error = ExecutionError::Interpret(InterpretError::PropertyNotFound {
+            property: "nonexistent".to_string(),
+            span: Span {
+                start: 4,
+                end: 14,
+                line: 0,
+                line_end: 0,
+            },
+        });
+
+        let output = capture_error_output("test.txt", source, error);
+        assert!(output.contains("Property nonexistent not found"));
+        assert!(output.contains("Check if that field is present"));
+    }
+
+    #[test]
+    fn test_environment_error_reporting() {
+        let source = "";
+        let error = ExecutionError::Environment(EnvironmentError::Other {
+            message: "Variable not found".to_string(),
+        });
+
+        let output = capture_error_output("test.txt", source, error);
+        assert!(output.contains("Variable not found"));
     }
 }

lykiadb-shell/src/main.rs

@@ -71,7 +71,9 @@ impl Shell {
             Message::Response(Response::Program(value)) => {
                 println!("{}", serde_json::to_string_pretty(&value).unwrap())
             }
-            Message::Response(Response::Error(err)) => report_error(filename, content, err.clone()),
+            Message::Response(Response::Error(err)) => {
+                report_error(filename, content, err.clone(), &mut stdout())
+            }
             _ => panic!(""),
         }
     }