Jest support: List fuzz test names if 'JAZZER_LIST_FUZZTEST_NAMES' is set

Futhermore will filter the list by regex if 'JAZZER_LIST_FUZZTEST_NAMES_PATTERN' is set.

Author: zgtm

packages/jest-runner/fuzz.ts

@@ -49,6 +49,26 @@ export const skip: (globals: Global.Global) => FuzzTest =
 
 export type JestTestMode = "skip" | "only" | "standard";
 
+function printTestNameIfRequested(testStatePath: string[]) {
+	const full_name: string = testStatePath.join(" ");
+	if (process.env.JAZZER_LIST_FUZZTEST_NAMES) {
+		if (
+			process.env.JAZZER_LIST_FUZZTEST_NAMES_PATTERN == undefined ||
+			full_name.match(process.env.JAZZER_LIST_FUZZTEST_NAMES_PATTERN)
+		) {
+			if (process.env.JAZZER_LIST_FUZZTEST_NAMES == "short") {
+				const short_name: string = testStatePath.pop() || "";
+				console.log(short_name);
+			} else if (process.env.JAZZER_LIST_FUZZTEST_NAMES == "split") {
+				const split_name: string = testStatePath.join(" / ");
+				console.log(split_name);
+			} else {
+				console.log(full_name);
+			}
+		}
+	}
+}
+
 export function fuzz(
 	globals: Global.Global,
 	testFile: string,
@@ -72,6 +92,9 @@ export function fuzz(
 		// only the requested tests are executed.
 		const testStatePath = currentTestStatePath(toTestName(name), state);
 		const testNamePattern = originalTestNamePattern();
+
+		printTestNameIfRequested(testStatePath);
+
 		const skip =
 			testStatePath !== undefined &&
 			testNamePattern != undefined &&

tests/jest_integration/integration.test.js

@@ -354,6 +354,66 @@ describe("Jest integration", () => {
 			});
 		});
 	});
+
+	describe("List all fuzz tests", () => {
+		const listFuzzTestNamesTestBuilder = new FuzzTestBuilder()
+			.dir(projectDir)
+			.listFuzzTestNames()
+			.jestTestFile(jestTestFile + ".js");
+
+		it("lists fuzz tests", () => {
+			const listFuzzTestNames = listFuzzTestNamesTestBuilder.build();
+
+			listFuzzTestNames.execute();
+
+			expect(listFuzzTestNames.stdout).toContain(
+				"Jest Integration execute sync test",
+			);
+			expect(listFuzzTestNames.stdout).toContain(
+				"Run mode skip and standard standard test",
+			);
+		});
+
+		it("filters fuzz tests by name", () => {
+			const listFuzzTestNames = listFuzzTestNamesTestBuilder
+				.listFuzzTestNamesPattern("sync test")
+				.build();
+
+			listFuzzTestNames.execute();
+
+			expect(listFuzzTestNames.stdout).toContain(
+				"Jest Integration execute sync test",
+			);
+			expect(listFuzzTestNames.stdout).not.toContain(
+				"Run mode skip and standard standard test",
+			);
+		});
+
+		it("filters fuzz tests by describe name", () => {
+			const listFuzzTestNames = listFuzzTestNamesTestBuilder
+				.listFuzzTestNamesPattern("Jest")
+				.build();
+
+			listFuzzTestNames.execute();
+
+			expect(listFuzzTestNames.stdout).toContain(
+				"Jest Integration execute sync test",
+			);
+			expect(listFuzzTestNames.stdout).not.toContain(
+				"Run mode skip and standard standard test",
+			);
+		});
+
+		it("prints nothing else on stdout", () => {
+			const listFuzzTestNames = listFuzzTestNamesTestBuilder
+				.listFuzzTestNamesPattern("__NOT_AN_ACTUAL_TESTNAME__")
+				.build();
+
+			listFuzzTestNames.execute();
+
+			expect(listFuzzTestNames.stdout).toBe("");
+		});
+	});
 });
 
 // Deflake the "timeout after N seconds" test to be more tolerant to small variations of N (+-1).