Add simple test for nullability warnings

mcimadamore · Aug 23, 2024 · 43e5a7e · 43e5a7e
1 parent dbf4f49
commit 43e5a7e
Show file tree

Hide file tree

Showing 2 changed files with 63 additions and 0 deletions.
diff --git a/test/langtools/tools/javac/nullability/NullabilityWarningsTest.java b/test/langtools/tools/javac/nullability/NullabilityWarningsTest.java
@@ -0,0 +1,53 @@
+/*
+ * @test /nodynamiccopyright/
+ * @summary Smoke test for nullability warnings
+ * @enablePreview
+ * @compile/fail/ref=NullabilityWarningsTest.out -XDrawDiagnostics -Werror -Xlint:null NullabilityWarningsTest.java
+ */
+
+public class NullabilityWarningsTest {
+    static class Box<T> {
+        T t;
+        Box(T t) {
+            this.t = t;
+        }
+        T get() { return t; }
+        void set(T t) { this.t = t; }
+    }
+
+    void test() {
+        String? s_null = null;
+        String! s_nonnull = "";
+        String s_unknown = null;
+        s_null = s_nonnull;
+        s_nonnull = s_null; //warn
+        s_unknown = s_null;
+        s_unknown = s_nonnull;
+
+        Box<String?> bs_null = null;
+        Box<String!> bs_nonnull = null;
+        Box<String> bs_unknown = null;
+        bs_null = bs_nonnull; //warn
+        bs_nonnull = bs_null; //warn
+        bs_unknown = bs_null;
+        bs_unknown = bs_nonnull;
+
+        Box<? super String?> bss_null = null;
+        Box<? super String!> bss_nonnull = null;
+        Box<? super String!> bss_unknown = null;
+
+        bss_nonnull = bss_null;
+        bss_null = bss_nonnull; //warn
+        bss_unknown = bss_null;
+        bss_unknown = bss_nonnull;
+
+        Box<? extends String?> bes_null = null;
+        Box<? extends String!> bes_nonnull = null;
+        Box<? extends String> bes_unknown = null;
+
+        bes_nonnull = bes_null; //warn
+        bes_null = bes_nonnull;
+        bes_unknown = bes_null;
+        bes_unknown = bes_nonnull;
+    }
+}
diff --git a/test/langtools/tools/javac/nullability/NullabilityWarningsTest.out b/test/langtools/tools/javac/nullability/NullabilityWarningsTest.out
@@ -0,0 +1,10 @@
+NullabilityWarningsTest.java:23:21: compiler.warn.unchecked.nullness.conversion
+NullabilityWarningsTest.java:30:19: compiler.warn.unchecked.nullness.conversion
+NullabilityWarningsTest.java:31:22: compiler.warn.unchecked.nullness.conversion
+NullabilityWarningsTest.java:40:20: compiler.warn.unchecked.nullness.conversion
+NullabilityWarningsTest.java:48:23: compiler.warn.unchecked.nullness.conversion
+- compiler.err.warnings.and.werror
+- compiler.note.preview.filename: NullabilityWarningsTest.java, DEFAULT
+- compiler.note.preview.recompile
+1 error
+5 warnings