1 files changed, 70 insertions, 0 deletions
diff --git a/src/librustdoc/clean/types/tests.rs b/src/librustdoc/clean/types/tests.rs
new file mode 100644
index 000000000..71eddf434
--- /dev/null
+++ b/src/librustdoc/clean/types/tests.rs
@@ -0,0 +1,70 @@
+use super::*;
+
+use crate::clean::collapse_doc_fragments;
+
+use rustc_span::create_default_session_globals_then;
+use rustc_span::source_map::DUMMY_SP;
+use rustc_span::symbol::Symbol;
+
+fn create_doc_fragment(s: &str) -> Vec<DocFragment> {
+    vec![DocFragment {
+        span: DUMMY_SP,
+        parent_module: None,
+        doc: Symbol::intern(s),
+        kind: DocFragmentKind::SugaredDoc,
+        indent: 0,
+    }]
+}
+
+#[track_caller]
+fn run_test(input: &str, expected: &str) {
+    create_default_session_globals_then(|| {
+        let mut s = create_doc_fragment(input);
+        unindent_doc_fragments(&mut s);
+        assert_eq!(collapse_doc_fragments(&s), expected);
+    });
+}
+
+#[test]
+fn should_unindent() {
+    run_test("    line1\n    line2", "line1\nline2");
+}
+
+#[test]
+fn should_unindent_multiple_paragraphs() {
+    run_test("    line1\n\n    line2", "line1\n\nline2");
+}
+
+#[test]
+fn should_leave_multiple_indent_levels() {
+    // Line 2 is indented another level beyond the
+    // base indentation and should be preserved
+    run_test("    line1\n\n        line2", "line1\n\n    line2");
+}
+
+#[test]
+fn should_ignore_first_line_indent() {
+    run_test("line1\n    line2", "line1\n    line2");
+}
+
+#[test]
+fn should_not_ignore_first_line_indent_in_a_single_line_para() {
+    run_test("line1\n\n    line2", "line1\n\n    line2");
+}
+
+#[test]
+fn should_unindent_tabs() {
+    run_test("\tline1\n\tline2", "line1\nline2");
+}
+
+#[test]
+fn should_trim_mixed_indentation() {
+    run_test("\t    line1\n\t    line2", "line1\nline2");
+    run_test("    \tline1\n    \tline2", "line1\nline2");
+}
+
+#[test]
+fn should_not_trim() {
+    run_test("\t    line1  \n\t    line2", "line1  \nline2");
+    run_test("    \tline1  \n    \tline2", "line1  \nline2");
+}