[IMP] jest: add toBeCloseTo to object Matcher

Part-of: #7376
Signed-off-by: Lucas Lefèvre (lul) <[email protected]>

Author: fdamhaut

tests/setup/jest_extend.ts

@@ -45,6 +45,7 @@ declare global {
     interface Expect {
       toBeBetween(lower: number, upper: number): ExpectResult;
       toBeSameColorAs(expected: string, tolerance?: number): ExpectResult;
+      toBeCloseTo(expected: number, closeDigit?: number): ExpectResult;
     }
   }
 }
@@ -190,6 +191,20 @@ CancelledReasons: ${this.utils.printReceived(dispatchResult.reasons)}
     }
     return { pass: true, message: () => "" };
   },
+  toBeCloseTo(received: number, expected: number, numDigits?: number) {
+    numDigits = numDigits ?? -2;
+    const pass = Math.abs(expected - received) < 10 ** numDigits / 2;
+    if (pass) {
+      return { pass: true, message: () => "" };
+    }
+    return {
+      pass: false,
+      message: () =>
+        `Expected ${received} to be close to ${expected} with a tolerance of ${
+          10 ** numDigits / 2
+        }`,
+    };
+  },
   toBeSameColorAs(received: string, expected: string, tolerance: number = 0) {
     let pass = false;
     if (received.startsWith("light-dark") || expected.startsWith("light-dark")) {