Write runtime test for spacing

Author: garronej

src/lib/spacing.ts

@@ -102,10 +102,10 @@ export function spacing(
                           "bottom": topBottom
                       };
             })(),
-            "top": params.top,
-            "right": params.right,
-            "bottom": params.bottom,
-            "left": params.left
+            ...(params.top === undefined ? undefined : { "top": params.top }),
+            ...(params.right === undefined ? undefined : { "right": params.right }),
+            ...(params.bottom === undefined ? undefined : { "bottom": params.bottom }),
+            ...(params.left === undefined ? undefined : { "left": params.left })
         };
 
         (["top", "right", "bottom", "left"] as const).forEach(p => {

test/behavior/lib/spacing.test.ts

@@ -9,4 +9,49 @@ describe("Testing the replacer function", () => {
 
         expect(got).toBe(expected);
     });
+
+    it("Works with margin topBottom", () => {
+        const got = spacing("margin", { "topBottom": "13w" });
+
+        const expected = {
+            "marginTop": "6.5rem",
+            "marginBottom": "6.5rem"
+        };
+
+        expect(got).toStrictEqual(expected);
+    });
+
+    it("Works with margin topBottom and left", () => {
+        const got = spacing("margin", { "topBottom": "13w", "left": 3 });
+
+        const expected = {
+            "marginTop": "6.5rem",
+            "marginBottom": "6.5rem",
+            "marginLeft": 3
+        };
+
+        expect(got).toStrictEqual(expected);
+    });
+
+    it("Works with margin topBottom overwriting bottom", () => {
+        const got = spacing("margin", { "topBottom": "13w", "bottom": 3 });
+
+        const expected = {
+            "marginTop": "6.5rem",
+            "marginBottom": 3
+        };
+
+        expect(got).toStrictEqual(expected);
+    });
+
+    it("Works with padding and rightLeft", () => {
+        const got = spacing("padding", { "rightLeft": "1v" });
+
+        const expected = {
+            "paddingRight": "0.25rem",
+            "paddingLeft": "0.25rem"
+        };
+
+        expect(got).toStrictEqual(expected);
+    });
 });