Ts all the tests (#1998)

* Convert tests to TypeScript

* Add types for tests

* Rename files to TS

* Fix up test imports

* Fix TSC errors

* Liiiint

* Add types to util method signatures

* Some more types

test-mocha/common/entity/attribute_class_names_test.ts

@@ -0,0 +1,48 @@
+import { assert } from "chai";
+
+import attributeClassNames from "../../../src/common/entity/attribute_class_names";
+
+describe("attributeClassNames", () => {
+  const attrs = ["mock_attr1", "mock_attr2"];
+
+  it("Skips null states", () => {
+    const stateObj: any = null;
+    assert.strictEqual(attributeClassNames(stateObj, attrs), "");
+  });
+
+  it("Matches no attrbutes", () => {
+    const stateObj: any = {
+      attributes: {
+        other_attr_1: 1,
+        other_attr_2: 2,
+      },
+    };
+    assert.strictEqual(attributeClassNames(stateObj, attrs), "");
+  });
+
+  it("Matches one attrbute", () => {
+    const stateObj: any = {
+      attributes: {
+        other_attr_1: 1,
+        other_attr_2: 2,
+        mock_attr1: 3,
+      },
+    };
+    assert.strictEqual(attributeClassNames(stateObj, attrs), "has-mock_attr1");
+  });
+
+  it("Matches two attrbutes", () => {
+    const stateObj: any = {
+      attributes: {
+        other_attr_1: 1,
+        other_attr_2: 2,
+        mock_attr1: 3,
+        mock_attr2: null,
+      },
+    };
+    assert.strictEqual(
+      attributeClassNames(stateObj, attrs),
+      "has-mock_attr1 has-mock_attr2"
+    );
+  });
+});