test: additional tests

Author: Shestakov Aleksandr

test/helpers.js

@@ -13,7 +13,7 @@ export function resolveExpectedFile(testName) {
   return resolvePath(testName, "expected.html");
 }
 
-export async function bundleWithRollup({ plugin, pluginOptions, testName, output }) {
+export async function bundleWithRollup({ plugin, pluginOptions, testName, output, format = "cjs" }) {
   const bundle = await rollup({
     input: resolvePath(testName, "App.svelte"),
     plugins: [
@@ -30,7 +30,7 @@ export async function bundleWithRollup({ plugin, pluginOptions, testName, output
   });
 
   await bundle.write({
-    format: "cjs",
+    format,
     file: output,
   });
 }

test/it-throws-error-for-non-cjs-format/App.svelte

@@ -0,0 +1 @@
+<div>Hello</div>

test/it-throws-error-if-no-filename-passed/App.svelte

@@ -0,0 +1 @@
+<div>Hello</div>

test/tests.js

@@ -165,11 +165,11 @@ describe("plugin tests", () => {
     const pluginOptions = {
       fileName: ssrOutputFile,
       preprocessHtml: function(html) {
-        return "<pre>replaced</pre>"
+        return "<pre>replaced</pre>";
       },
       preprocessCss: function(css) {
         return "body { opacity: 0; }";
-      }
+      },
     };
 
     await bundleWithRollup({ plugin, pluginOptions, testName, output: ssrBundleFile });
@@ -183,6 +183,47 @@ describe("plugin tests", () => {
     expectHtmlEqual(actual, expected);
 
     // cleanup
-    // await del(resolvePath(testName, "dist"));
+    await del(resolvePath(testName, "dist"));
+  });
+
+  it("should throw error for non-cjs format", async () => {
+    const pluginOptions = {
+      fileName: "doesnt-matter.html",
+      skipEmit: true,
+    };
+
+    let error;
+    try {
+      await bundleWithRollup({
+        format: "esm",
+        plugin,
+        pluginOptions,
+        testName: "it-throws-error-for-non-cjs-format",
+        output: "doesnt-matter.html",
+      });
+    } catch (e) {
+      error = e;
+    }
+    expect(error).toEqual(new Error("rollup-plugin-svelte-ssr can only be used with 'cjs'-format"));
+  });
+
+  it("should throw error if no filename option has been passed", async () => {
+    const pluginOptions = {
+      skipEmit: true,
+    };
+
+    let error;
+    try {
+      await bundleWithRollup({
+        format: "esm",
+        plugin,
+        pluginOptions,
+        testName: "it-throws-error-if-no-filename-passed",
+        output: "doesnt-matter.html",
+      });
+    } catch (e) {
+      error = e;
+    }
+    expect(error).toEqual(new Error("options.fileName should be string or function"));
   });
 });