Add negative test cases for AlwaysThrows with non-literal arguments.

PiperOrigin-RevId: 837246366

Author: graememorgan

core/src/test/java/com/google/errorprone/bugpatterns/AlwaysThrowsTest.java

@@ -45,6 +45,23 @@ void f() {
         .doTest();
   }
 
+  @Test
+  public void negative_nonLiteral() {
+    testHelper
+        .addSourceLines(
+            "Test.java",
+            """
+            import java.time.Instant;
+
+            class T {
+              void f() {
+                Instant.parse(toString() + "foo");
+              }
+            }
+            """)
+        .doTest();
+  }
+
   @Test
   public void immutableMapThrows() {
     testHelper
@@ -218,4 +235,19 @@ class Test {
             """)
         .doTest();
   }
+
+  @Test
+  public void uuidFromString_withNonLiteral() {
+    testHelper
+        .addSourceLines(
+            "Test.java",
+            """
+            import java.util.UUID;
+
+            class Test {
+              private final UUID uuid = UUID.fromString(toString());
+            }
+            """)
+        .doTest();
+  }
 }