first commit

5 files changed, 63 insertions, 0 deletions

diff --git a/node_modules/exponential-backoff/src/jitter/full/full.jitter.spec.ts b/node_modules/exponential-backoff/src/jitter/full/full.jitter.spec.ts
new file mode 100644
index 0000000..003d08d
--- /dev/null
+++ b/node_modules/exponential-backoff/src/jitter/full/full.jitter.spec.ts
@@ -0,0 +1,31 @@
+import { fullJitter } from './full.jitter';
+
+describe(`Testing ${fullJitter.name}`, () => {
+    const delay = 100;
+    
+    function arrayWith5FullJitterDelays() {
+        return Array(5).fill(delay).map(fullJitter)
+    }
+
+    describe(`when calling #fullJitter on the same delay multiple times`, () => {
+        it('all the delays are greater than or equal to 0', () => {
+            arrayWith5FullJitterDelays()
+            .forEach(value => expect(value).toBeGreaterThanOrEqual(0));
+        })
+
+        it('all the delays are less than or equal to the original delay', () => {
+            arrayWith5FullJitterDelays()
+            .forEach(value => expect(value).toBeLessThanOrEqual(delay));
+        })
+
+        it('the delays are not equal to one another', () => {
+            const delays = arrayWith5FullJitterDelays();
+            expect(new Set(delays).size).not.toBe(1);
+        })
+
+        it('the delays are integers', () => {
+            arrayWith5FullJitterDelays()
+            .forEach(value => expect(Number.isInteger(value)).toBe(true))
+        })
+    })
+})
\ No newline at end of file
diff --git a/node_modules/exponential-backoff/src/jitter/full/full.jitter.ts b/node_modules/exponential-backoff/src/jitter/full/full.jitter.ts
new file mode 100644
index 0000000..b3c447b
--- /dev/null
+++ b/node_modules/exponential-backoff/src/jitter/full/full.jitter.ts
@@ -0,0 +1,4 @@
+export function fullJitter(delay: number) {
+    const jitteredDelay = Math.random() * delay;
+    return Math.round(jitteredDelay);
+}
\ No newline at end of file
diff --git a/node_modules/exponential-backoff/src/jitter/jitter.factory.ts b/node_modules/exponential-backoff/src/jitter/jitter.factory.ts
new file mode 100644
index 0000000..b549887
--- /dev/null
+++ b/node_modules/exponential-backoff/src/jitter/jitter.factory.ts
@@ -0,0 +1,16 @@
+import { IBackOffOptions } from "../options";
+import { fullJitter } from "./full/full.jitter";
+import { noJitter } from "./no/no.jitter";
+
+export type Jitter = (delay: number) => number;
+
+export function JitterFactory(options: IBackOffOptions): Jitter {
+  switch (options.jitter) {
+    case "full":
+      return fullJitter;
+
+    case "none":
+    default:
+      return noJitter;
+  }
+}
diff --git a/node_modules/exponential-backoff/src/jitter/no/no.jitter.spec.ts b/node_modules/exponential-backoff/src/jitter/no/no.jitter.spec.ts
new file mode 100644
index 0000000..1d56524
--- /dev/null
+++ b/node_modules/exponential-backoff/src/jitter/no/no.jitter.spec.ts
@@ -0,0 +1,9 @@
+import { noJitter } from './no.jitter';
+
+describe(`Testing ${noJitter.name}`, () => {
+    it(`when calling #noJitter with a delay,
+    it returns the same delay`, () => {
+        const delay = 100;
+        expect(noJitter(delay)).toBe(delay);
+    })
+})
\ No newline at end of file
diff --git a/node_modules/exponential-backoff/src/jitter/no/no.jitter.ts b/node_modules/exponential-backoff/src/jitter/no/no.jitter.ts
new file mode 100644
index 0000000..bc1b56f
--- /dev/null
+++ b/node_modules/exponential-backoff/src/jitter/no/no.jitter.ts
@@ -0,0 +1,3 @@
+export function noJitter(delay: number) {
+    return delay;
+}
\ No newline at end of file