fix: fetchFromMultipleSources returns errorOccurred only if all sources fail

src/libs/fetchFromMultipleSources.spec.ts

@@ -21,8 +21,8 @@ describe("fetchFromMultipleSources", () => {
     expect(result).toEqual(2);
   });
 
-  it("has promises with valid responses, contains no errors", async () => {
-    const { errors } = await fetchFromMultipleSources<number>([
+  it("has promises with valid responses, no error occurred", async () => {
+    const { errorOccurred } = await fetchFromMultipleSources<number>([
       () => Promise.resolve(undefined),
       () => Promise.resolve(null),
       () => Promise.reject(),
@@ -30,28 +30,25 @@ describe("fetchFromMultipleSources", () => {
       () => Promise.resolve(3),
     ]);
 
-    expect(errors).toBeNull();
+    expect(errorOccurred).toBeFalse();
   });
 
-  it("has promises with no valid responses, returns null", async () => {
+  it("has promises that all throw, returns null", async () => {
     const { result } = await fetchFromMultipleSources<number>([
-      () => Promise.resolve(null),
       () => Promise.reject("error"),
-      () => Promise.resolve(undefined),
+      () => Promise.reject(new Error("error")),
     ]);
 
     expect(result).toBeNull();
   });
 
-  it("has promises with no valid responses, contains error", async () => {
-    const { errors } = await fetchFromMultipleSources<number>([
-      () => Promise.resolve(null),
+  it("has promises that all throw, contains error", async () => {
+    const { errorOccurred } = await fetchFromMultipleSources<number>([
       () => Promise.reject("error"),
       () => Promise.reject(new Error("error")),
-      () => Promise.resolve(undefined),
     ]);
 
-    expect(errors).toEqual(["error", new Error("error")]);
+    expect(errorOccurred).toBeTrue();
   });
 
   it("has promises but cache has value, returns cached value", async () => {
@@ -71,7 +68,7 @@ describe("fetchFromMultipleSources", () => {
   });
 
   it("has promises but cache has value, contains no errors", async () => {
-    const { errors } = await fetchFromMultipleSources<number>(
+    const { errorOccurred } = await fetchFromMultipleSources<number>(
       [
         () => Promise.resolve(null),
         () => Promise.reject("error"),
@@ -83,7 +80,7 @@ describe("fetchFromMultipleSources", () => {
       },
     );
 
-    expect(errors).toBeNull();
+    expect(errorOccurred).toBeFalse();
   });
 
   it("has promises, no cached value, no valid response, should not save in cache", async () => {