New upstream version 1.52.1+dfsg1

[rustc.git] / vendor / rustc-ap-rustc_span / src / tests.rs

diff --git a/vendor/rustc-ap-rustc_span/src/tests.rs b/vendor/rustc-ap-rustc_span/src/tests.rs
new file mode 100644 (file)
index 0000000..3c8eb8b
--- /dev/null
+++ b/vendor/rustc-ap-rustc_span/src/tests.rs
@@ -0,0 +1,40 @@
+use super::*;
+
+#[test]
+fn test_lookup_line() {
+    let lines = &[BytePos(3), BytePos(17), BytePos(28)];
+
+    assert_eq!(lookup_line(lines, BytePos(0)), -1);
+    assert_eq!(lookup_line(lines, BytePos(3)), 0);
+    assert_eq!(lookup_line(lines, BytePos(4)), 0);
+
+    assert_eq!(lookup_line(lines, BytePos(16)), 0);
+    assert_eq!(lookup_line(lines, BytePos(17)), 1);
+    assert_eq!(lookup_line(lines, BytePos(18)), 1);
+
+    assert_eq!(lookup_line(lines, BytePos(28)), 2);
+    assert_eq!(lookup_line(lines, BytePos(29)), 2);
+}
+
+#[test]
+fn test_normalize_newlines() {
+    fn check(before: &str, after: &str, expected_positions: &[u32]) {
+        let mut actual = before.to_string();
+        let mut actual_positions = vec![];
+        normalize_newlines(&mut actual, &mut actual_positions);
+        let actual_positions: Vec<_> = actual_positions.into_iter().map(|nc| nc.pos.0).collect();
+        assert_eq!(actual.as_str(), after);
+        assert_eq!(actual_positions, expected_positions);
+    }
+    check("", "", &[]);
+    check("\n", "\n", &[]);
+    check("\r", "\r", &[]);
+    check("\r\r", "\r\r", &[]);
+    check("\r\n", "\n", &[1]);
+    check("hello world", "hello world", &[]);
+    check("hello\nworld", "hello\nworld", &[]);
+    check("hello\r\nworld", "hello\nworld", &[6]);
+    check("\r\nhello\r\nworld\r\n", "\nhello\nworld\n", &[1, 7, 13]);
+    check("\r\r\n", "\r\n", &[2]);
+    check("hello\rworld", "hello\rworld", &[]);
+}