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-rw-r--r--devtools/shared/tests/xpcshell/test_fetch-file.js113
1 files changed, 113 insertions, 0 deletions
diff --git a/devtools/shared/tests/xpcshell/test_fetch-file.js b/devtools/shared/tests/xpcshell/test_fetch-file.js
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+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Tests for DevToolsUtils.fetch on file:// URI's.
+
+const { FileUtils } = ChromeUtils.importESModule(
+ "resource://gre/modules/FileUtils.sys.mjs"
+);
+
+const TEST_CONTENT = "aéd";
+
+// The TEST_CONTENT encoded as UTF-8.
+const UTF8_TEST_BUFFER = new Uint8Array([0x61, 0xc3, 0xa9, 0x64]);
+
+// The TEST_CONTENT encoded as ISO 8859-1.
+const ISO_8859_1_BUFFER = new Uint8Array([0x61, 0xe9, 0x64]);
+
+/**
+ * Tests that URLs with arrows pointing to an actual source are handled properly
+ * (bug 808960). For example 'resource://gre/modules/XPIProvider.jsm ->
+ * file://l10n.js' should load 'file://l10n.js'.
+ */
+add_task(async function test_arrow_urls() {
+ const { path } = createTemporaryFile(".js");
+ const url = "resource://gre/modules/XPIProvider.jsm -> file://" + path;
+
+ await IOUtils.writeUTF8(path, TEST_CONTENT);
+ const { content } = await DevToolsUtils.fetch(url);
+
+ deepEqual(content, TEST_CONTENT, "The file contents were correctly read.");
+});
+
+/**
+ * Tests that empty files are read correctly.
+ */
+add_task(async function test_empty() {
+ const { path } = createTemporaryFile();
+ const { content } = await DevToolsUtils.fetch("file://" + path);
+ deepEqual(content, "", "The empty file was read correctly.");
+});
+
+/**
+ * Tests that UTF-8 encoded files are correctly read.
+ */
+add_task(async function test_encoding_utf8() {
+ const { path } = createTemporaryFile();
+ await IOUtils.write(path, UTF8_TEST_BUFFER);
+
+ const { content } = await DevToolsUtils.fetch(path);
+ deepEqual(
+ content,
+ TEST_CONTENT,
+ "The UTF-8 encoded file was correctly read."
+ );
+});
+
+/**
+ * Tests that ISO 8859-1 (Latin-1) encoded files are correctly read.
+ */
+add_task(async function test_encoding_iso_8859_1() {
+ const { path } = createTemporaryFile();
+ await IOUtils.write(path, ISO_8859_1_BUFFER);
+
+ const { content } = await DevToolsUtils.fetch(path);
+ deepEqual(
+ content,
+ TEST_CONTENT,
+ "The ISO 8859-1 encoded file was correctly read."
+ );
+});
+
+/**
+ * Test that non-existent files are handled correctly.
+ */
+add_task(async function test_missing() {
+ await DevToolsUtils.fetch("file:///file/not/found.right").then(
+ result => {
+ info(result);
+ ok(false, "Fetch resolved unexpectedly when the file was not found.");
+ },
+ () => {
+ ok(true, "Fetch rejected as expected because the file was not found.");
+ }
+ );
+});
+
+/**
+ * Test that URLs without file:// scheme work.
+ */
+add_task(async function test_schemeless_files() {
+ const { path } = createTemporaryFile();
+
+ await IOUtils.writeUTF8(path, TEST_CONTENT);
+
+ const { content } = await DevToolsUtils.fetch(path);
+ deepEqual(content, TEST_CONTENT, "The content was correct.");
+});
+
+/**
+ * Creates a temporary file that is removed after the test completes.
+ */
+function createTemporaryFile(extension) {
+ const name = "test_fetch-file-" + Math.random() + (extension || "");
+ const file = FileUtils.getFile("TmpD", [name]);
+ file.create(Ci.nsIFile.NORMAL_FILE_TYPE, parseInt("0755", 8));
+
+ registerCleanupFunction(() => {
+ file.remove(false);
+ });
+
+ return file;
+}