feat: add fromMaybe, toMaybe tests

src/either/utils/index.ts

@@ -1 +1,3 @@
 export * from './from-throwable'
+export * from './from-maybe'
+export * from './to-maybe'

src/either/utils/to-maybe.ts

@@ -1,4 +1,4 @@
-import { Maybe, none, of } from 'src/maybe'
+import { Maybe, none, of } from '../../maybe'
 import { Either } from '../either'
 
 /**

tests/either.test.ts

@@ -1,4 +1,4 @@
-import { E } from '../src'
+import { E, M } from '../src'
 
 const eitherExampleString = 'cannot work with 0'
 const eitherExampleError = new Error(eitherExampleString)
@@ -135,7 +135,7 @@ describe('either.ts', () => {
       )
       .fold(
         () => {
-          throw new Error('shouldnt be called')
+          throw new Error('should not be called')
         },
         (user) =>
           expect(user).toMatchObject({
@@ -144,4 +144,31 @@ describe('either.ts', () => {
           }),
       )
   })
+
+  it('fromMaybe', () => {
+    E.fromMaybe(M.of(42), '!').fold(
+      () => {
+        throw new Error('should not be called')
+      },
+      (v) => expect(v).toBe(42),
+    )
+
+    E.fromMaybe(M.none<number>(), 'maybe is none').fold(
+      (e) => expect(e).toBe('maybe is none'),
+      () => {
+        throw new Error('should not be called')
+      },
+    )
+  })
+
+  it('toMaybe', () => {
+    const eitherRight: E.Either<string, number> = E.right(5)
+    const eitherLeft: E.Either<string, number> =
+      E.left('string')
+
+    E.toMaybe(eitherRight).map((value) =>
+      expect(value).toBe(5),
+    )
+    expect(E.toMaybe(eitherLeft).value).toBeNull()
+  })
 })