1 files changed, 262 insertions, 0 deletions
diff --git a/cli/js/test_util.ts b/cli/js/test_util.ts
new file mode 100644
index 000000000..2f2916e11
--- /dev/null
+++ b/cli/js/test_util.ts
@@ -0,0 +1,262 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+//
+// We want to test many ops in deno which have different behavior depending on
+// the permissions set. These tests can specify which permissions they expect,
+// which appends a special string like "permW1N0" to the end of the test name.
+// Here we run several copies of deno with different permissions, filtering the
+// tests by the special string. permW1N0 means allow-write but not allow-net.
+// See tools/unit_tests.py for more details.
+
+import * as testing from "../../std/testing/mod.ts";
+import { assert, assertEquals } from "../../std/testing/asserts.ts";
+export {
+  assert,
+  assertThrows,
+  assertEquals,
+  assertMatch,
+  assertNotEquals,
+  assertStrictEq,
+  assertStrContains,
+  unreachable
+} from "../../std/testing/asserts.ts";
+
+interface TestPermissions {
+  read?: boolean;
+  write?: boolean;
+  net?: boolean;
+  env?: boolean;
+  run?: boolean;
+  hrtime?: boolean;
+}
+
+const processPerms = Deno.permissions();
+
+function permissionsMatch(
+  processPerms: Deno.Permissions,
+  requiredPerms: Deno.Permissions
+): boolean {
+  for (const permName in processPerms) {
+    if (processPerms[permName] !== requiredPerms[permName]) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+export const permissionCombinations: Map<string, Deno.Permissions> = new Map();
+
+function permToString(perms: Deno.Permissions): string {
+  const r = perms.read ? 1 : 0;
+  const w = perms.write ? 1 : 0;
+  const n = perms.net ? 1 : 0;
+  const e = perms.env ? 1 : 0;
+  const u = perms.run ? 1 : 0;
+  const h = perms.hrtime ? 1 : 0;
+  return `permR${r}W${w}N${n}E${e}U${u}H${h}`;
+}
+
+function registerPermCombination(perms: Deno.Permissions): void {
+  const key = permToString(perms);
+  if (!permissionCombinations.has(key)) {
+    permissionCombinations.set(key, perms);
+  }
+}
+
+function normalizeTestPermissions(perms: TestPermissions): Deno.Permissions {
+  return {
+    read: !!perms.read,
+    write: !!perms.write,
+    net: !!perms.net,
+    run: !!perms.run,
+    env: !!perms.env,
+    hrtime: !!perms.hrtime
+  };
+}
+
+export function testPerm(
+  perms: TestPermissions,
+  fn: testing.TestFunction
+): void {
+  const normalizedPerms = normalizeTestPermissions(perms);
+
+  registerPermCombination(normalizedPerms);
+
+  if (!permissionsMatch(processPerms, normalizedPerms)) {
+    return;
+  }
+
+  testing.test(fn);
+}
+
+export function test(fn: testing.TestFunction): void {
+  testPerm(
+    {
+      read: false,
+      write: false,
+      net: false,
+      env: false,
+      run: false,
+      hrtime: false
+    },
+    fn
+  );
+}
+
+function extractNumber(re: RegExp, str: string): number | undefined {
+  const match = str.match(re);
+
+  if (match) {
+    return Number.parseInt(match[1]);
+  }
+}
+
+export function parseUnitTestOutput(
+  rawOutput: Uint8Array,
+  print: boolean
+): { actual?: number; expected?: number; resultOutput?: string } {
+  const decoder = new TextDecoder();
+  const output = decoder.decode(rawOutput);
+
+  let expected, actual, result;
+
+  for (const line of output.split("\n")) {
+    if (!expected) {
+      // expect "running 30 tests"
+      expected = extractNumber(/running (\d+) tests/, line);
+    } else if (line.indexOf("test result:") !== -1) {
+      result = line;
+    }
+
+    if (print) {
+      console.log(line);
+    }
+  }
+
+  // Check that the number of expected tests equals what was reported at the
+  // bottom.
+  if (result) {
+    // result should be a string like this:
+    // "test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; ..."
+    actual = extractNumber(/(\d+) passed/, result);
+  }
+
+  return { actual, expected, resultOutput: result };
+}
+
+test(function permissionsMatches(): void {
+  assert(
+    permissionsMatch(
+      {
+        read: true,
+        write: false,
+        net: false,
+        env: false,
+        run: false,
+        hrtime: false
+      },
+      normalizeTestPermissions({ read: true })
+    )
+  );
+
+  assert(
+    permissionsMatch(
+      {
+        read: false,
+        write: false,
+        net: false,
+        env: false,
+        run: false,
+        hrtime: false
+      },
+      normalizeTestPermissions({})
+    )
+  );
+
+  assertEquals(
+    permissionsMatch(
+      {
+        read: false,
+        write: true,
+        net: true,
+        env: true,
+        run: true,
+        hrtime: true
+      },
+      normalizeTestPermissions({ read: true })
+    ),
+    false
+  );
+
+  assertEquals(
+    permissionsMatch(
+      {
+        read: true,
+        write: false,
+        net: true,
+        env: false,
+        run: false,
+        hrtime: false
+      },
+      normalizeTestPermissions({ read: true })
+    ),
+    false
+  );
+
+  assert(
+    permissionsMatch(
+      {
+        read: true,
+        write: true,
+        net: true,
+        env: true,
+        run: true,
+        hrtime: true
+      },
+      {
+        read: true,
+        write: true,
+        net: true,
+        env: true,
+        run: true,
+        hrtime: true
+      }
+    )
+  );
+});
+
+testPerm({ read: true }, async function parsingUnitTestOutput(): Promise<void> {
+  const cwd = Deno.cwd();
+  const testDataPath = `${cwd}/tools/testdata/`;
+
+  let result;
+
+  // This is an example of a successful unit test output.
+  result = parseUnitTestOutput(
+    await Deno.readFile(`${testDataPath}/unit_test_output1.txt`),
+    false
+  );
+  assertEquals(result.actual, 96);
+  assertEquals(result.expected, 96);
+
+  // This is an example of a silently dying unit test.
+  result = parseUnitTestOutput(
+    await Deno.readFile(`${testDataPath}/unit_test_output2.txt`),
+    false
+  );
+  assertEquals(result.actual, undefined);
+  assertEquals(result.expected, 96);
+
+  // This is an example of compiling before successful unit tests.
+  result = parseUnitTestOutput(
+    await Deno.readFile(`${testDataPath}/unit_test_output3.txt`),
+    false
+  );
+  assertEquals(result.actual, 96);
+  assertEquals(result.expected, 96);
+
+  // Check what happens on empty output.
+  result = parseUnitTestOutput(new TextEncoder().encode("\n\n\n"), false);
+  assertEquals(result.actual, undefined);
+  assertEquals(result.expected, undefined);
+});