Share base style syntax between rendering and editor validation

packages/email-renderer/test/style-values.test.ts

@@ -0,0 +1,13 @@
+import { expect, test } from "bun:test";
+import { emailStyleValue, validateEmailStyleValue } from "../src/style-values.ts";
+
+test("base style syntax rejects ignored or injected values and accepts supported units", () => {
+  for (const [key, value] of [["padding","12"],["padding","1px 2px 3px 4px 5px"],["color","#12345"],["fontWeight","heavy"],["fontSize","12px;color:red"],["position","fixed"],["constructor","x"]]) {
+    expect(emailStyleValue(key!, value)).toBe("");
+    expect(() => validateEmailStyleValue(key!, value!)).toThrow();
+  }
+  for (const [key, value] of [["padding","0 12px"],["margin","1rem 2%"],["color","#1234"],["fontWeight","700"],["fontSize","16px"],["borderRadius","0"],["textAlign","end"]]) {
+    expect(emailStyleValue(key!, value)).toBe(value!);
+    expect(() => validateEmailStyleValue(key!, value!)).not.toThrow();
+  }
+});