refactor(std/example): Inconsistencies in the example tests (#7684)

1 files changed, 91 insertions, 0 deletions

diff --git a/std/examples/catj_test.ts b/std/examples/catj_test.ts
new file mode 100644
index 000000000..031a161c9
--- /dev/null
+++ b/std/examples/catj_test.ts
@@ -0,0 +1,91 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+import { assertStrictEquals } from "../testing/asserts.ts";
+import { dirname, fromFileUrl } from "../path/mod.ts";
+
+const moduleDir = dirname(fromFileUrl(import.meta.url));
+
+Deno.test("[examples/catj] print an array", async () => {
+  const decoder = new TextDecoder();
+  const process = catj("testdata/catj/array.json");
+  try {
+    const output = await process.output();
+    const actual = decoder.decode(output).trim();
+    const expected = [
+      '.[0] = "string"',
+      ".[1] = 100",
+      '.[2].key = "value"',
+      '.[2].array[0] = "foo"',
+      '.[2].array[1] = "bar"',
+    ].join("\n");
+
+    assertStrictEquals(actual, expected);
+  } finally {
+    process.stdin.close();
+    process.close();
+  }
+});
+
+Deno.test("[examples/catj] print an object", async () => {
+  const decoder = new TextDecoder();
+  const process = catj("testdata/catj/object.json");
+  try {
+    const output = await process.output();
+    const actual = decoder.decode(output).trim();
+    const expected = [
+      '.string = "foobar"',
+      ".number = 123",
+      '.array[0].message = "hello"',
+    ].join("\n");
+
+    assertStrictEquals(actual, expected);
+  } finally {
+    process.stdin.close();
+    process.close();
+  }
+});
+
+Deno.test("[examples/catj] print multiple files", async () => {
+  const decoder = new TextDecoder();
+  const process = catj(
+    "testdata/catj/simple-object.json",
+    "testdata/catj/simple-array.json",
+  );
+  try {
+    const output = await process.output();
+    const actual = decoder.decode(output).trim();
+    const expected = ['.message = "hello"', ".[0] = 1", ".[1] = 2"].join("\n");
+
+    assertStrictEquals(actual, expected);
+  } finally {
+    process.stdin.close();
+    process.close();
+  }
+});
+
+Deno.test("[examples/catj] read from stdin", async () => {
+  const decoder = new TextDecoder();
+  const process = catj("-");
+  const input = `{ "foo": "bar" }`;
+  try {
+    await process.stdin.write(new TextEncoder().encode(input));
+    process.stdin.close();
+    const output = await process.output();
+    const actual = decoder.decode(output).trim();
+
+    assertStrictEquals(actual, '.foo = "bar"');
+  } finally {
+    process.close();
+  }
+});
+
+function catj(
+  ...files: string[]
+): Deno.Process<Deno.RunOptions & { stdin: "piped"; stdout: "piped" }> {
+  return Deno.run({
+    cmd: [Deno.execPath(), "run", "--allow-read", "catj.ts", ...files],
+    cwd: moduleDir,
+    stdin: "piped",
+    stdout: "piped",
+    env: { NO_COLOR: "true" },
+  });
+}