Add test.

tests/ui/collapsible_span_lint_calls.rs

@@ -0,0 +1,43 @@
+ #![deny(clippy::internal)]
+ #![feature(rustc_private)]
+
+ extern crate rustc_session;
+ extern crate rustc_errors;
+ extern crate rustc_lint;
+ extern crate syntax;
+ extern crate clippy_lints;
+
+use rustc_session::{declare_tool_lint, declare_lint_pass};
+use rustc_errors::Applicability;
+use rustc_lint::{EarlyContext, EarlyLintPass};
+use syntax::ast::Expr;
+use clippy_lints::utils::span_lint_and_then;
+
+declare_tool_lint!{
+    pub clippy::TEST_LINT,
+    Warn,
+    "",
+    report_in_external_macro: true
+}
+
+declare_lint_pass!(Pass => [TEST_LINT]);
+
+impl EarlyLintPass for Pass {
+    fn check_expr(&mut self, cx: &EarlyContext, expr: &Expr)  {
+        let lint_msg = "lint message";
+        let help_msg = "help message";
+        let note_msg = "note message";
+        let sugg = "new_call()";
+        span_lint_and_then(cx, expr.span, lint_msg, |db| {
+            db.span_suggestion(expr.span, help_msg, sugg, Applicability::MachineApplicable);
+        });
+        span_lint_and_then(cx, expr.span, lint_msg, |db| {
+            db.span_help(expr.span, help_msg);
+        });
+        span_lint_and_then(cx, expr.span, lint_msg, |db| {
+            db.span_note(expr.span, note_msg);
+        });
+    }
+}
+
+fn main() {}