1 files changed, 64 insertions, 0 deletions
diff --git a/browser/extensions/formautofill/test/unit/test_toOneLineAddress.js b/browser/extensions/formautofill/test/unit/test_toOneLineAddress.js
new file mode 100644
index 0000000000..ee04c8d1d5
--- /dev/null
+++ b/browser/extensions/formautofill/test/unit/test_toOneLineAddress.js
@@ -0,0 +1,64 @@
+"use strict";
+
+var FormAutofillUtils;
+add_setup(async () => {
+  ({ FormAutofillUtils } = ChromeUtils.importESModule(
+    "resource://gre/modules/shared/FormAutofillUtils.sys.mjs"
+  ));
+});
+
+add_task(async function test_getCategoriesFromFieldNames() {
+  const TEST_CASES = [
+    {
+      strings: ["A", "B", "C", "D"],
+      expectedValue: "A B C D",
+    },
+    {
+      strings: ["A", "B", "", "D"],
+      expectedValue: "A B D",
+    },
+    {
+      strings: ["", "B", "", "D"],
+      expectedValue: "B D",
+    },
+    {
+      strings: [null, "B", " ", "D"],
+      expectedValue: "B D",
+    },
+    {
+      strings: "A B C",
+      expectedValue: "A B C",
+    },
+    {
+      strings: "A\nB\n\n\nC",
+      expectedValue: "A B C",
+    },
+    {
+      strings: "A B \nC",
+      expectedValue: "A B C",
+    },
+    {
+      strings: "A-B-C",
+      expectedValue: "A B C",
+      delimiter: "-",
+    },
+    {
+      strings: "A B\n \nC",
+      expectedValue: "A B C",
+    },
+    {
+      strings: null,
+      expectedValue: "",
+    },
+  ];
+
+  for (let tc of TEST_CASES) {
+    let result;
+    if (tc.delimiter) {
+      result = FormAutofillUtils.toOneLineAddress(tc.strings, tc.delimiter);
+    } else {
+      result = FormAutofillUtils.toOneLineAddress(tc.strings);
+    }
+    Assert.equal(result, tc.expectedValue);
+  }
+});