1 files changed, 75 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/warp/string-trim.js b/js/src/jit-test/tests/warp/string-trim.js
new file mode 100644
index 0000000000..0ca05be8ac
--- /dev/null
+++ b/js/src/jit-test/tests/warp/string-trim.js
@@ -0,0 +1,75 @@
+const whitespace = [
+  // Ascii whitespace
+  " ",
+  "\t",
+
+  // Latin-1 whitespace
+  "\u{a0}",
+
+  // Two-byte whitespace
+  "\u{1680}",
+];
+
+const strings = [
+  // Empty string
+  "",
+
+  // Ascii strings
+  "a",
+  "abc",
+
+  // Latin-1 strings
+  "á",
+  "áèô",
+
+  // Two-byte strings
+  "\u{100}",
+  "\u{100}\u{101}\u{102}",
+].flatMap(x => [
+  x,
+
+  // Leading whitespace
+  ...whitespace.flatMap(w => [w + x, w + w + x]),
+
+  // Trailing whitespace
+  ...whitespace.flatMap(w => [x + w, x + w + w]),
+
+  // Leading and trailing whitespace
+  ...whitespace.flatMap(w => [w + x + w, w + w + x + w + w]),
+
+  // Interspersed whitespace
+  ...whitespace.flatMap(w => [x + w + x, x + w + w + x]),
+]);
+
+function trim(strings) {
+  // Compute expected values using RegExp.
+  let expected = strings.map(x => x.replace(/(^\s+)|(\s+$)/g, ""));
+
+  for (let i = 0; i < 1000; ++i) {
+    let index = i % strings.length;
+    assertEq(strings[index].trim(), expected[index]);
+  }
+}
+for (let i = 0; i < 2; ++i) trim(strings);
+
+function trimStart(strings) {
+  // Compute expected values using RegExp.
+  let expected = strings.map(x => x.replace(/(^\s+)/g, ""));
+
+  for (let i = 0; i < 1000; ++i) {
+    let index = i % strings.length;
+    assertEq(strings[index].trimStart(), expected[index]);
+  }
+}
+for (let i = 0; i < 2; ++i) trimStart(strings);
+
+function trimEnd(strings) {
+  // Compute expected values using RegExp.
+  let expected = strings.map(x => x.replace(/(\s+$)/g, ""));
+
+  for (let i = 0; i < 1000; ++i) {
+    let index = i % strings.length;
+    assertEq(strings[index].trimEnd(), expected[index]);
+  }
+}
+for (let i = 0; i < 2; ++i) trimEnd(strings);