[#145] parse_insert_columns 테스트코드 작성

src/parser/test/insert.rs

@@ -437,3 +437,62 @@ fn test_insert_query() {
         }
     }
 }
+
+#[test]
+fn test_parse_insert_columns() {
+    struct TestCase {
+        name: String,
+        input: Vec<Token>,
+        expected: Vec<String>,
+        want_error: bool,
+    }
+
+    let test_cases = vec![
+        TestCase {
+            name: "a, b, c)".into(),
+            input: vec![
+                Token::Identifier("a".into()),
+                Token::Comma,
+                Token::Identifier("b".into()),
+                Token::Comma,
+                Token::Identifier("c".into()),
+                Token::RightParentheses,
+            ],
+            expected: vec!["a".into(), "b".into(), "c".into()],
+            want_error: false,
+        },
+        TestCase {
+            name: "a, b, SELECT)".into(),
+            input: vec![
+                Token::Identifier("a".into()),
+                Token::Comma,
+                Token::Identifier("b".into()),
+                Token::Comma,
+                Token::Select,
+                Token::RightParentheses,
+            ],
+            expected: vec![],
+            want_error: true,
+        },
+
+    ];
+
+    for t in test_cases {
+        let mut parser = Parser::new(t.input);
+
+        let got = parser.parse_insert_columns(Default::default());
+
+        assert_eq!(
+            got.is_err(),
+            t.want_error,
+            "{}: want_error: {}, error: {:?}",
+            t.name,
+            t.want_error,
+            got.err()
+        );
+
+        if let Ok(statements) = got {
+            assert_eq!(statements, t.expected, "TC: {}", t.name);
+        }
+    }
+}