1 files changed, 24 insertions, 0 deletions
diff --git a/build/clang-plugin/tests/TestNANTestingExpr.cpp b/build/clang-plugin/tests/TestNANTestingExpr.cpp
new file mode 100644
index 0000000000..9aac46d036
--- /dev/null
+++ b/build/clang-plugin/tests/TestNANTestingExpr.cpp
@@ -0,0 +1,24 @@
+#line 1 "tests/SkScalar.h"
+// This checks that the whitelist accounts for #line directives and such. If you
+// remove SkScalar from the whitelist, please change the filename here instead
+// of adding expected diagnostics.
+inline int headerSays(double x) {
+  return x != x;
+}
+#line 9 "TestNANTestingExpr.cpp"
+void test(bool x);
+void foo() {
+  float f, f2;
+  typedef double mydouble;
+  mydouble d;
+  double d2;
+  test(f == f); // expected-error{{comparing a floating point value to itself for NaN checking can lead to incorrect results}} expected-note{{consider using std::isnan instead}}
+  test(d == d); // expected-error{{comparing a floating point value to itself for NaN checking can lead to incorrect results}} expected-note{{consider using std::isnan instead}}
+  test(f != f); // expected-error{{comparing a floating point value to itself for NaN checking can lead to incorrect results}} expected-note{{consider using std::isnan instead}}
+  test(d != d); // expected-error{{comparing a floating point value to itself for NaN checking can lead to incorrect results}} expected-note{{consider using std::isnan instead}}
+  test(f != d);
+  test(d == (d - f));
+  test(f == f2);
+  test(d == d2);
+  test(d + 1 == d);
+}