1 files changed, 32 insertions, 0 deletions
diff --git a/cli/js/test_util.ts b/cli/js/test_util.ts
index 4115bb5de..a546fa5c5 100644
--- a/cli/js/test_util.ts
+++ b/cli/js/test_util.ts
@@ -296,3 +296,35 @@ testPerm({ read: true }, async function parsingUnitTestOutput(): Promise<void> {
   assertEquals(result.actual, undefined);
   assertEquals(result.expected, undefined);
 });
+
+/*
+ * Ensure all unit test files (e.g. xxx_test.ts) are present as imports in
+ * cli/js/unit_tests.ts as it is easy to miss this out
+ */
+testPerm(
+  { read: true },
+  async function assertAllUnitTestFilesImported(): Promise<void> {
+    const directoryTestFiles = Deno.readDirSync("./cli/js")
+      .map(k => k.name)
+      .filter(file => file.endsWith("_test.ts"));
+    const unitTestsFile: Uint8Array = Deno.readFileSync(
+      "./cli/js/unit_tests.ts"
+    );
+    const importLines = new TextDecoder("utf-8")
+      .decode(unitTestsFile)
+      .split("\n")
+      .filter(line => line.startsWith("import") && line.includes("_test.ts"));
+    const importedTestFiles = importLines.map(
+      relativeFilePath => relativeFilePath.match(/\/([^\/]+)";/)[1]
+    );
+
+    directoryTestFiles.forEach(dirFile => {
+      if (!importedTestFiles.includes(dirFile)) {
+        throw new Error(
+          "cil/js/unit_tests.ts is missing import of test file: cli/js/" +
+            dirFile
+        );
+      }
+    });
+  }
+);