1 files changed, 94 insertions, 0 deletions
diff --git a/prettier/main_test.ts b/prettier/main_test.ts
index 718b716af..0d6015080 100644
--- a/prettier/main_test.ts
+++ b/prettier/main_test.ts
@@ -37,6 +37,10 @@ function normalizeOutput(output: string): string {
     .join("\n");
 }
 
+function normalizeSourceCode(source: string): string {
+  return source.replace(/\r/g, "");
+}
+
 async function clearTestdataChanges(): Promise<void> {
   await xrun({ args: ["git", "checkout", testdata] }).status();
 }
@@ -90,3 +94,93 @@ Formatting ./prettier/testdata/foo/1.js`
 
   await clearTestdataChanges();
 });
+
+test(async function testPrettierOptions() {
+  await clearTestdataChanges();
+
+  const file0 = join(testdata, "opts", "0.ts");
+  const file1 = join(testdata, "opts", "1.ts");
+  const file2 = join(testdata, "opts", "2.ts");
+  const file3 = join(testdata, "opts", "3.md");
+
+  const getSourceCode = async f => decoder.decode(await Deno.readFile(f));
+
+  await run([...cmd, "--no-semi", file0]);
+  assertEquals(
+    normalizeSourceCode(await getSourceCode(file0)),
+    `console.log(0)
+console.log([function foo() {}, function baz() {}, a => {}])
+`
+  );
+
+  await run([...cmd, "--print-width", "30", "--tab-width", "4", file0]);
+  assertEquals(
+    normalizeSourceCode(await getSourceCode(file0)),
+    `console.log(0);
+console.log([
+    function foo() {},
+    function baz() {},
+    a => {}
+]);
+`
+  );
+
+  await run([...cmd, "--print-width", "30", "--use-tabs", file0]);
+  assertEquals(
+    normalizeSourceCode(await getSourceCode(file0)),
+    `console.log(0);
+console.log([
+	function foo() {},
+	function baz() {},
+	a => {}
+]);
+`
+  );
+
+  await run([...cmd, "--single-quote", file1]);
+  assertEquals(
+    normalizeSourceCode(await getSourceCode(file1)),
+    `console.log('1');
+`
+  );
+
+  await run([...cmd, "--print-width", "30", "--trailing-comma", "all", file0]);
+  assertEquals(
+    normalizeSourceCode(await getSourceCode(file0)),
+    `console.log(0);
+console.log([
+  function foo() {},
+  function baz() {},
+  a => {},
+]);
+`
+  );
+
+  await run([...cmd, "--no-bracket-spacing", file2]);
+  assertEquals(
+    normalizeSourceCode(await getSourceCode(file2)),
+    `console.log({a: 1});
+`
+  );
+
+  await run([...cmd, "--arrow-parens", "always", file0]);
+  assertEquals(
+    normalizeSourceCode(await getSourceCode(file0)),
+    `console.log(0);
+console.log([function foo() {}, function baz() {}, (a) => {}]);
+`
+  );
+
+  await run([...cmd, "--prose-wrap", "always", file3]);
+  assertEquals(
+    normalizeSourceCode(await getSourceCode(file3)),
+    `Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor
+incididunt ut labore et dolore magna aliqua.
+`
+  );
+
+  await run([...cmd, "--end-of-line", "crlf", file2]);
+  assertEquals(await getSourceCode(file2), "console.log({ a: 1 });\r\n");
+
+  await clearTestdataChanges();
+});