Add a test that synchronous module execution errors are not treated as unhandled promise rejections.

(cherry picked from commit 60ca7d7)

Author: woess

graal-js/src/com.oracle.truffle.js.test/src/com/oracle/truffle/js/test/regress/GR61889.java

@@ -0,0 +1,169 @@
+/*
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+ * The above copyright notice and either this complete permission notice or at a
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+ * portions of the Software.
+ *
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+ */
+package com.oracle.truffle.js.test.regress;
+
+import static com.oracle.truffle.js.runtime.JSContextOptions.UNHANDLED_REJECTIONS_NAME;
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.CoreMatchers.not;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+
+import org.graalvm.polyglot.Context;
+import org.graalvm.polyglot.PolyglotException;
+import org.graalvm.polyglot.Source;
+import org.graalvm.polyglot.io.IOAccess;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameter;
+import org.junit.runners.Parameterized.Parameters;
+
+import com.oracle.truffle.js.test.JSTest;
+import com.oracle.truffle.js.test.polyglot.MockFileSystem;
+
+@RunWith(Parameterized.class)
+public class GR61889 {
+
+    @Parameters(name = "unhandled-rejections={0}")
+    public static Iterable<String> data() {
+        return List.of("none", "throw", "warn");
+    }
+
+    @Parameter(0) public String unhandledRejections;
+
+    /**
+     * Do not treat rejected module evaluation promises as unhandled rejections.
+     */
+    @Test
+    public void testRejectedModulePromiseIsHandled() throws IOException {
+        var fs = new MockFileSystem(Map.of(
+                        "eval-throws-error.mjs", """
+                                        export function foo() {return 42}
+                                        throw new Error("Thrown from within the library");
+                                        """,
+                        "eval-throws-non-error.mjs", """
+                                        export function foo() {return 42}
+                                        throw "Thrown from within the library";
+                                        """));
+
+        try (var out = new ByteArrayOutputStream();
+                        Context c = JSTest.newContextBuilder().//
+                                        option(UNHANDLED_REJECTIONS_NAME, unhandledRejections).//
+                                        allowIO(IOAccess.newBuilder().fileSystem(fs).build()).//
+                                        out(out).err(out).build()) {
+            // Error thrown from another synchronously executed module.
+            for (String moduleCode : List.of(
+                            "import * as throws from './eval-throws-error.mjs';",
+                            "import * as throws from './eval-throws-non-error.mjs';")) {
+                try {
+                    c.eval(Source.newBuilder("js", moduleCode, "main.mjs").buildLiteral());
+                    fail("should have thrown");
+                } catch (PolyglotException e) {
+                    assertFalse(e.getMessage(), e.isSyntaxError());
+                    assertTrue(e.getMessage(), e.isGuestException());
+                    assertThat(e.getMessage(), containsString("Thrown from within the library"));
+                    assertThat(e.getMessage(), not(containsString("Unhandled promise rejection")));
+                }
+            }
+            assertThat("No unhandled rejection warnings", out.toString(), equalTo(""));
+        }
+
+        try (var out = new ByteArrayOutputStream();
+                        Context c = JSTest.newContextBuilder().//
+                                        option(UNHANDLED_REJECTIONS_NAME, unhandledRejections).//
+                                        allowIO(IOAccess.newBuilder().fileSystem(fs).build()).//
+                                        out(out).err(out).build()) {
+            // Error object thrown from the main module.
+            for (String moduleCode : List.of("""
+                            export function foo() {return 42}
+                            throw new Error("Thrown from within main module");
+                            """, """
+                            export function foo() {return 42}
+                            throw "Thrown from within main module";
+                            """)) {
+                try {
+                    c.eval(Source.newBuilder("js", moduleCode, "main.mjs").buildLiteral());
+                    fail("should have thrown");
+                } catch (PolyglotException e) {
+                    assertFalse(e.getMessage(), e.isSyntaxError());
+                    assertTrue(e.getMessage(), e.isGuestException());
+                    assertThat(e.getMessage(), containsString("Thrown from within main module"));
+                    assertThat(e.getMessage(), not(containsString("Unhandled promise rejection")));
+                }
+                assertThat("No unhandled rejection warnings", out.toString(), equalTo(""));
+            }
+        }
+    }
+
+    /**
+     * Do not treat rejected module loading promises as unhandled rejections.
+     */
+    @Test
+    public void testRejectedLoadRequestedModulesPromiseIsHandled() throws IOException {
+        var fs = new MockFileSystem(Map.of());
+        try (var out = new ByteArrayOutputStream();
+                        Context c = JSTest.newContextBuilder().//
+                                        option(UNHANDLED_REJECTIONS_NAME, unhandledRejections).//
+                                        allowIO(IOAccess.newBuilder().fileSystem(fs).build()).//
+                                        out(out).err(out).build()) {
+            try {
+                c.eval(Source.newBuilder("js", """
+                                import * as throws from "./does_not_exist.mjs";
+                                """, "./throws-during-load.mjs").buildLiteral());
+                fail("should have thrown");
+            } catch (PolyglotException e) {
+                assertFalse(e.getMessage(), e.isSyntaxError());
+                assertTrue(e.getMessage(), e.isGuestException());
+                assertThat(e.getMessage(), containsString("Cannot find module"));
+                assertThat(e.getMessage(), not(containsString("Unhandled promise rejection")));
+            }
+            assertThat(out.toString(), equalTo(""));
+        }
+    }
+}