Fix invalid board

games/linkedin-1-partial.txt

@@ -9,7 +9,7 @@ GGGGMMMM
 
 ...Q....
 .....Q..
-Q.......
+.Q......
 ........
 Q.......
 ..Q.....

tests/reads_all_text_files.rs

@@ -0,0 +1,25 @@
+use std::{ffi::OsStr, fs};
+
+use anyhow::Result;
+
+use qsolve::{file::QueensFile, solvestate::SolveState};
+
+#[test]
+fn reads_all_text_files() -> Result<()> {
+    for dir_entry in fs::read_dir("games/")? {
+        let dir_entry = dir_entry?;
+        let path = dir_entry.path();
+        let extension = path.extension().and_then(OsStr::to_str);
+        if extension != Some("txt") {
+            continue;
+        }
+        let queens_file = QueensFile::try_from_text_file(&path)?;
+        let solve_state = SolveState::from(&queens_file);
+        assert!(
+            solve_state.is_valid(),
+            "Testing initial state validity for {:?}",
+            dir_entry.path()
+        );
+    }
+    Ok(())
+}